Architectural Precast
Content
SECTION 03450 Architectural Precast Concrete Guide Specification
This Guide Specification is intended to be used as a basis in the preparation of specifications for a particular project. This Guide Specification must e edited to fit the conditions of use! Particular attention should be given to the deletion of inapplicable provisions or inclusion of appropriate requirements. Coordinate the specifications with with the information shown on the contract drawings to avoid duplication or conflicts. Shaded portions are Notes to the Specification Writer. Writer.
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PA"T # $ GENE"A% 1.1 RELATED RELATED DOCUMENTS DOCUMENTS
'. ,rawings ,rawings and general provisions provisions of the ContractContract- including General General and Supplementar Supplementar Conditions Conditions and ,ivision / Specification Sections- appl to this Section. 1.2 SUMMAR SUMMARY Y
'. This section includes the performance criteriacriteria- materials- production- and erection erection of architectural precast concrete for the entire project. The wor0 performed under this section includes all laborlabormaterial- equipment- related services- and supervision required for the manufacture and erection of the architectural precast concrete wor0 shown on the contract drawings. 'djust list below to suit Project. ,elete paragraph below if not listing listing tpe of units. 1. This Section Section include includess tthe he follow following2 ing2 /. 'rchitectural precast concrete cladding and loadbearing units. 3. !nsulated- architectural precast concrete units. $. 1ric04faced- archit architectural ectural precast concrete units. %. Stone4faced- architectural precast concrete units. C. (elated Sections include the following2 +ist below onl products and construction that the reader might e5pect to find in this Section but are specified elsewhere. "ther sections of the specifications not referenced belowbelow- shall also appl to the e5tent required for proper performance of this wor0. /
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,ivisi ,ivision on $ Section Section 6Cast 6Cast4in 4in4Pl 4Place ace Concr Concrete ete77 for placi placing ng connect connection ion anchor anchorss in concre concrete. te. ,i ,ivi visi sion on $ Sectio Section n 6Glas 6Glass4 s48i 8ibe ber4 r4(e (ein info forc rced ed Concr Concret ete. e.77 ,ivisi ,ivision on % Section Section 6,im 6,imens ension ion Stone Stone Claddi Cladding7 ng7 for for furnis furnishin hing g stone stone facing facingss and anchor anchorages ages.. ,ivisi ,ivision on % Sectio Section n 6Cast 6Cast Stone7 Stone7 for for wet wet or dr dr cast cast stone stone facin facingsgs- trim trim-- and acces accessor sories ies..
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,ivisi ,ivision on & Section Section 6Struc 6Structur tural al Steel7 Steel7 for for connect connection ion attac attachme hment nt to struct structura ural4s l4stee teell framing framing.. ,ivisi ,ivision on : Section Section 6Wat 6Water er (epell (epellent ents7 s7 for wate water4 r4rep repell ellent ent finis finish h treatm treatment ents. s. ,ivisi ,ivision on : Section Section 6Sheet 6Sheet ;eta ;etall 8lashin 8lashing g and Trim Trim77 for flash flashing ing recei receiver verss and regle reglets. ts. ,ivisi ,ivision on : Section Section 6=oin 6=ointt Sealant Sealants7 s7 for elas elastom tomeri ericc joint joint sealan sealants ts and seal sealant ant bac0i bac0ings ngs.. ,ivisi ,ivision on < Section Section 6'lumi 6'luminum num Win Window dows7 s7 for window windowss set into into architec architectur tural al precast precast concr concrete ete units and tiebac0s for window washing equipment.
1.3 DEFINITIO DEFINITIONS NS
(etain paragraph below if a design reference sample has been pre4approved and is available for review. '. ,esign (eferen (eference ce Sample2 Sample2 Sample Sample of approved architec architectural tural precast precast concrete concrete colorcolor- finish finish and te5ture- pre4approved b 'rchitect. 1.4 PERFORMANCE PERFORMANCE REQUIREMEN REQUIREMENTS TS
'lwas include the governing building code including the ear or edition of the code. This will establish the edition edition of design specifications that are appropriate. 8or e5ample- a specific edition edition of the 'C! code is associated with each edition of the !nternational 1uilding Code. '. Gove Governing rning building code2 &Insert 'o(ernin' uildin' code includin' edition date) 1. Structural Performance2 Performance2 Provide architectural precast concrete units and connections capable of withstanding design loads within limits and under conditions indicated. (etain paragraph above if placing design loads on ,rawings? retain paragraph and applicable subparagraphs below if including including design loads here. (evise requirements below to suit Project- and add other performance and design criteria if applicable. C. Structural Performance2 Performance2 Provide architectural precast concrete units and connections capable of withstanding the following design loads within limits and under conditions indicated2 's a minimum dead loads include panel weight and the weight@sA of the materials that bear bea r on them. /. ,ead +oa +oad ds2 &Insert applicale dead loads!) 3. +ive +o +oads2 &Insert applicale li(e loads!) $. Wind +oad +oads2 s2 &Insert applicale *ind loads or *ind+loadin' criteria, positi(e and ne'ati(e for (arious parts of the uildin' as re-uired . applicale uildin' code or ASCE /, includin' asic *ind speed, importance factor, eposure cate'or., and pressure coefficient!)
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%. Seis Seismi micc +oad +oads2 s2 &Insert applicale seismic desi'n data includin' seismic performance cate'or., importance factor, use 'roup, seismic desi'n cate'or., seismic 1one, site classification, site coefficient and drift criteria!) &. Pr Proj ojec ectt Spe Speci cifi ficc +oad +oads2 s2 &Insert applicale loads!) Show locations here or on ,rawings if different movement is anticipated for different building elements. 9. ,esign ,esign framing framing sstem sstem and connections connections to maintain maintain clearances clearances at openingsopenings- to allow allow for fabricat fabrication ion and construction tolerances- to accommodate live load deflection- shrin0age and creep of primar building structure- and other building movements. Temperature Temperature value in first subparagraph below is suitable for most of the *.S. *.S . based on assumed design temperature of :# deg. 8. (evise to suit local conditions. Temperature Temperature data is is available from National "ceanic and 'tmospheric 'tmospheric 'dministration 'dministration at www.ncdc.noaa.gov. www.ncdc.noaa.gov. :. Thermal Thermal ;ovements2 ;ovements2 Provide Provide for in4pla in4plane ne thermal thermal movements movements resulting resulting from from annual annual ambient ambient temperature changes of <# deg 8 &Insert temperature). *se other values- greater or smallersmallerwhenever justified b climatic conditions at the project site. ,elete paragraph below if fire fire resistance rating is is not required. 8ire ratings depend on occupanc and building construction tpe- and are generall a building code requirement. When required- fire4rated products should be clearl identified on the design drawings. <. 8ire (esis (esistance tance (ating (ating22 Select material material and minimum minimum thic0ness thic0nesses es to provide provide &one hour) &t*o hour) fire rating. ,elete paragraph below if window washing sstem is not required. Specif forces on drawings when resistance is required. >. Window Window Was Washing hing Sstem2 Sstem2 ,esign ,esign panels for for window window washing washing sstem sstem indicated indicated to resist resist forces forces transmitted from window washing equipment pull4out and horiBontal shear. shear. 'll design criteria criteria for window washing sstem- including material and equipment- furnished b "wner. (etain paragraph below if stone faced precast concrete are used on project. /#. Stone to Precast 'nchorages2 Provide anchors- as determined through "wners or stone supplier testing- in numbers- tpes and locations as required to satisf the performance criteria specified- but not less than the following. a. ;inimum ;inimum 'nchora 'nchorage ge (equirement (equirement22 Not less less than than 3 anchors anchors per stone stone unit unit of less less than than 3 sq. ft. in area and % anchors per unit of less than /3 sq. ft.in area and for units larger than /3 sq. ft.in area- provide anchors spaced not more than 3% inches o.c. both horiBontall and verticall- all located a minimum of 9 inches from stone edge. ,elete paragraph below if units are not used u sed in par0ing structure to resist impact load.
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//. Dehicular Dehicular !mpact +oads2 ,esign spandrel beams acting as vehicular barrier for passenger cars to to resist a single load of 9-### lbs service load and /#-### lbs ultimate load applied horiBontall in an direction to the spandrel beam- with anchorages or attachments capable of transferring this load to the structure. 8or design of these beamsbeams- assume the load to act at a height of /< inches above the floor or ramp surface on an area not to e5ceed / sq. ft. 1.5 SUBMITTA SUBMITTALS LS
'. Product ,ata2 8or each each tpe tpe of product product indicated. indicated. (etain (etain qualit qualit control control records records and certi certificat ficates es of compliance for & ears or period of warrant- whichever is greater. 1. ,esign ;i5es2 ;i5es2 8or each concrete mi5 mi5 along with compressive strength and water4absorption water4absorption tests. C. Shop @rectionA @rectionA ,rawings2 ,etail fabrication and installation installation of architectural precast concrete units. !ndicate member locations- plans- elevationselevations- dimensions- shapes and cros crosss sections. !ndicate aesthetic intent including jointsjoints- reveals- and e5tent and location of each surface finish. !ndicate details at building corners. /. !ndicate !ndicate separate separate face and bac0up bac0up mi5 locationslocations- and thic0nes thic0nesses. ses. 3. !ndicate welded connections b 'WS standard smbols. smbols. ,etail loose loose and cast4in hardware- and connections. $. !ndicate !ndicate locationslocations- tolerances tolerances and details details of anchorage devices devices to be embedded in or attached attached to structure or other construction. %. !ndicate locations- e5tent and treatment treatment of dr joints if two4stage two4stage casting is proposed. &. !ndicate !ndicate plans- andEor andEor elevation elevationss showing showing unit location. location. 9. !ndicate location of each ar architectural chitectural precast concrete unit b same identification mar0 mar0 placed on panel. :. !ndicate !ndicate relationship relationship of architectural architectural precast precast concrete units to adjacent materials. materials. <. !ndicate !ndicate locations locations and details details of bric0 bric0 units and joint joint treatment. treatment. >. !ndicate !ndicate locations locations and details details of stone facingsfacings- stone and joint widths. widths. /#. ,esign ,esign ;odificatio ;odifications2 ns2 a. !f design design modificati modifications ons are necessar necessar to meet the the performance performance requirem requirements ents and field field conditionsdesign calculations calculations and drawings. ,omaterials not adversel affect thethe appearancedurabilit orsubmit strength of units when modifing details or and maintain general design concept. (etain subparagraph below if 6Performance (equirements7 'rticle 'rticle is retained. ,elete or modif if 'rchitect assumes or is required b law to assume design responsibilit. //.Comprehensive engineering design signed and sealed b the qualified professional engineer responsible for its preparation registered in the the state in which the project project is located. Show governing panel tpes- connections- and a nd tpes of reinforcement- including special reinforcement. Coordinate the location- tpe- magnitude and direction of all imposed loadings from the precast sstem to the building structural frame with the ngineer of (ecord. (eco rd. (etain paragraph below if finishes- colors- and te5tures are preselectedp reselected- specified- or scheduled.
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,. Samples2 ,esign reference samples for for initial initial verification verification of design intentintent- appro5imatel /3 b /3 b 3 inches- representative of finishes- color- and te5tures te5tures of e5posed surfaces of architectural precast concrete units. /. When bac0 face face of precast precast concrete concrete unit unit is to be e5posede5posed- show show samples samples of the the wor0manship wor0manship-color- and te5ture of the bac0up concrete as well as the facing. . Samples Samples for each bric0 bric0 unit requir requireded- showing showing the full full range of color color and te5tur te5turee e5pected. e5pected. Suppl s0etch of each corner or special shape with dimensions. Suppl sample showing color and te5ture of joint treatment. (etain first paragraph below if procedures for welder certification are retained in 6Fualit 6 Fualit 'ssurance7 'rticle. 8. Welding Welding Certific Certificates2 ates2 Copies of certi certificat ficates es for welding welding procedure procedure specificatio specifications ns @WPSA and personnel. ;anufacturer should have a minimum of 3 ears of production e5perience in architectural p precast recast concrete wor0 comparable to that shown and specified- in not less than three projects of similar scope with the "wner or 'rchitect determining the suitabilit of the e5perience. G. Fualification ,ata2 ,ata2 8or firms firms and persons specified specified in 6Fualit 'ssurance7 'rticle 'rticle to demonstrate their capabilities and e5perience. !nclude list of complet completed ed projects with project names names and addresses- names and addresses of architects and ownersown ers- and other information specified. ,elete test reports below if not required. ). ;aterial Test Test (eports2 8rom a qualified testing testing agenc indicating and interpreting test test results results of the following for compliance with requirements indicated2 (etain paragraph above or below. !. ;aterial ;aterial Certif Certificate icates2 s2 Signed b manufact manufacturers urers certifin certifing g that each of the follow following ing items items complies with requirements. (etain list below with with either paragraph above. dit to suit Project. /. 3. $. %. &. 9. :. <.
Conc Concre rete te mate materi rial als. s. (einforcin (einforcing g materia materials ls and prestress prestressing ing tendons. tendons. 'dm 'dmi5tur 5tures es.. 1ear 1eariing pads pads.. Structural Structural4steel 4steel shapes and hollow hollow structura structurall sections sections.. !ns nsu ulation 1r 1ric ic0 0 uni units. ts. Ston Stonee anc ancho horrs.
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QUALIT QUALITY Y ASSUR ASSURANC ANCE E
'. recto rectorr Fualifi Fualificat cation ions2 s2 rector should have a minimum of 3 ears of e5perience in architectural precast concrete wor0 comparable to that shown and specified in not less than three projects of similar scope with the owner or 'rchitect 'rchitect determining the suitabilit of the e5perience. The inclusion of erection in the precast concrete contract should should be governed b local practices. See www.pci.org www.pci.org for for current PC!4Fualified rectors. /. ' precast precast concrete concrete erector erector Fualified Fualified b the PrecastEPres PrecastEPrestres tressed sed Concrete Concrete !nstitute !nstitute @PC!A prior prior to beginning wor0 at the project site. Submit a current Certificate of Compliance furnished b PC! designating qualification in 2Cate'or. A Architectural S.stems for non+load+earin' memers 2Cate'or. S6 Comple Structural S.stems for load+earin' memers! (etain paragraph below if PC!4Fualified rector is not available for Project. 3. 'n erector erector with a minimum minimum of of 3 ears of e5perience e5perience who has complet completed ed architectu architectural ral precast precast concrete wor0 similar in material- design- and e5tent to that indicated for this Project and whose wor0 has resulted in construction with a record of successful in4service performance and who meets the following requirements2 a. (etains (etains a PC! Certified Certified 8ield 8ield 'uditor 'uditor-- at erectors erectors e5pensee5pense- to conduct conduct a field field audit of a project in the same categor as this Project prior to start of erection. erection. Submits rectors Post 'udit ,eclaration. b. The basis of the audit is the 6PC! rectors ;anual 4 Standards and Guidelines for the rection of Precast Concrete Products7 ;N+ /3:. 1. 8abricator Fualifications2 Fualifications2 ' firm that complies complies with the following following requirements and is e5perienced in producing architectural precast concrete units similar to those indicated for this Project and with a record of successful in4service performance. /. Participate Participatess in PC!s PC!s Plant Certif Certificati ication on program at the the time of bidding bidding and is designated designated a PC!4 certified plant for Group '- Categor '/4 'rchitectural Cladding and +oad 1earing *nits. 3. )as sufficien sufficientt production production capacit to produce produce requir required ed units without without delaing delaing the Wor0. Wor0. ,elete subparagraph below if fabricators are not required to be registered with and approved b b authorities having jurisdiction. jurisdiction. +ist approved fabricators in in Part 3 if required. required. $. !s registe registered red with with and approved approved b authori authorities ties having having jurisdi jurisdiction ction.. (etain first paragraph below if PC! Certification Program provides qualit assurance testing- and additional qualit assurance testing is required. Testing Testing agenc is normall engaged b "wner. C. Te Testing sting 'genc 'genc Fualificat Fualifications2 ions2 'n independe independent nt testing testing agencagenc- 2acceptale to authorities ha(in' 7urisdiction 7urisdict ion qualified according to 'ST; C /#:: and 'ST; $3> to conduct the testing indicated- as documented according to 'ST; &%<.
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,. ,esign Standards Standards22 Compl with with 'C! 'C! $/< and the design design recommendati recommendations ons of PC! ;N+ /3#- 6PC! ,esign )andboo0 Precast and an d Prestressed Concrete-7 applicable to tpes of architectural precast concrete units indicated. . Fualit4Con Fualit4Control trol Standard2 Standard2 8or manufacturi manufacturing ng procedures procedures and testing testing requirement requirementss- qualit4 qualit4 control control recommendations- and dimensional tolerances for tpes of units required- compl with PC! ;N+ //:- 6;anual for Fualit Control for Plants and Production of 'rchitectural Precast Concrete Products.7 ,elete paragraph below if no welding is required. (etain 6We 6Welding lding Certificates7 Paragraph in 7Submittals7 'rticle 'rticle if paragraph below is retained. 'WS states that welding qualifications remain in effect indefinitel unless welding personnel have not welded for more than si5 months or there is a specific reason to question their abilit. 8. Welding2 Welding2 Fualif procedures and personnel according to 'WS ,/./- 6Structural Welding Welding Code Steel7? and 'WS 'WS ,/.%- 6Structural Welding Welding Code (einforcing Steel.7 (etain paragraph below if fire4rated units or assemblies assemblies are required. Select either PC! ;N+ /3% or 'C! 3/9./ET;S #3/9./ or retain both if acceptable to authorities having jurisdiction. G. Calculated 8ire4Test4(esponse 8ire4Test4(esponse Characteristics2 Where indicated- provide architectural precast concrete units whose fire resistance has been calculated according to 2PCI 8N% #64, 9:esi'n for ;ire "esistance of Precast Prestressed Concrete,< 2ACI 6#=!#>T8S 06#=!#, 9Standard 8ethod for :eterminin' ;ire "esistance of Concrete and 8asonr. Construction Assemlies,< and is acceptable to authorities having jurisdiction. PC! recommends review of preproduction preproduction sample panels or fir first st production unit. (evise siBe and number of sample panels to suit Project. ). Sample Panels2 'fter sample approval and before fabricating fabricating architectural architectural precast concrete unitsunits produce a minimum of two sample panels appro5imatel /9 square feet in siBe for review b 'rchitect. !ncorporate full scale details details of architectural featuresfeatures- finishes- te5tures- and transitions in the sample panels. /. +ocate +ocate panels where where indicated indicated oror- if not indicat indicateded- as directed directed b 'rchitec 'rchitect. t. 3. ,amage part part of an e5posed4face e5posed4face surface surface for each each finishfinish- colorcolor- and te5turete5ture- and demonstra demonstrate te adequac of repair techniques proposed propo sed for repair of surface blemishes. $. 'fter acceptan acceptance ce of repair techniqu techniquee- maintain maintain one sample sample panel at the manufactur manufacturers ers plant plant and one at the project site in an undisturbed condition as a standard for judging the completed Wor0. %. ,emolish ,emolish and remove remove sample sample panels panels when directed. directed. PC! recommends production of finish and te5ture range samples when color and te5ture uniformit concerns could be an issue- the 'rchi 'rchitect tect or precaster has not had previous e5perience with the specified mi5 and finish- or a large project has multiple approving authorities.
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!. (ange Sample Samples2 s2 'fter 'fter sample sample panel panel approval approval and and before before production production of architec architectural tural precast precast concrete units- produce a minimum of &three) &fi(e) samples- appro5imatel /9 square feet in siBe- representing anticipated range of color and te5ture on projects units. 8ollowing range sample acceptance b the 'rchitect- maintain samples at the manufacturers plant as color and te5ture acceptabilit reference. ,elete paragraph and subparagraphs below if sample panels above will suffice and the added e5pense of moc0ups is not required. required. !f retaining- indicate locationlocation- siBe- and other details of moc0ups on ,rawings or b inserts. inserts. (evise wording if onl one moc0up is required. =. ;oc0ups2 ;oc0ups2 'fter 'fter sample sample approval approval but but before before production production of of architectur architectural al precast precast concrete concrete unitsunitsconstruct full siBed moc0ups to verif selections made under sample Submittals and to demonstrate aesthetic effects and qualities qualities of materials and e5ecution. ;oc0up to be representative of the the finished wor0 in all respects including glass- aluminum framing- sealants and architectural precast concrete complete with all anchors- connectionsconn ections- flashings- and joint fillers as accepted on the final shop drawings. 1uild moc0ups to compl with with the following requirements- us using ing materials indicated for the completed wor02 (evise or delete subparagraphs below to suit Project. /. 1uild moc0ups moc0ups in in the location location and of the the siBe indicate indicated d or- if if not indicatedindicated- as directed directed b 'rchitect. 3. Notif Notif 'rchit 'rchitect ect in advance advance of dates dates and times times when moc0ups moc0ups will will be constructe constructed. d. $. "btain "btain 'rchite 'rchitect ctss approval approval of moc0ups moc0ups before starti starting ng fabrication fabrication.. %. !n presence presence of 'rchit 'rchitectect- damage damage part of an e5posed face face for each finishfinish- colorcolor- and and te5turete5ture- and demonstrate materials and techniques proposed for repairs to match adjacent undamaged surfaces. &. ;aintain ;aintain moc0ups moc0ups during construc construction tion in an undisturb undisturbed ed condition condition as a standard standard for judging judging the completed Wor0. 9. ,emoli ,emolish sh and remo remove ve moc0ups moc0ups when when direc directed ted.. (etain subparagraph below if moc0ups are erected as part of building rather than separatel and the intention is to ma0e an e5ception e5c eption to the default requirement in ,ivision / Section- 7Fualit (equirements7 for demolishing and removing moc0ups. :. 'pproved 'pproved moc0ups moc0ups ma become become part of the the completed completed Wor Wor0 0 if undamaged undamaged at the time time of Substantial Completion. ,elete paragraph below if moc0up above is to be used for Testing ;oc0up. H. Testing Testing ;oc0up2 Provide a single full siBed moc0up for testing b others to the e5tent shown shown or indicated to simulate the precast and window wall assembl. assembl. (efer to ,ivision < W!N,"W 'N, C*(T'!N C*(T '!N W'+ W'++S +S for requirements applicable to testing architectural precast concrete sstems in conjunction with windows and window wall. ,elete below if Wor0 of this Section is not e5tensive or comple5 enough to justif a pre4installation conference. !f retainingretaining- coordinate with with ,ivision /. <
+. Preinstall Preinstallation ation Conferen Conference2 ce2 Conduct Conduct conference conference at Project Project site site to compl compl with require requirements ments in in ,ivision / Section 6Project ;anagement and Coordination.7 1.7 PRODUCT DELIVERY, DELIVERY, STORAGE AND HANDLING
'. Store units units with adequate adequate dunnage and bracing and protect protect units to prevent prevent contact with with soilstaining- and to prevent crac0ing- distortion- warping or other phsical damage. 1. Store unitsunits- unless otherwise otherwise specifiedspecified- with non4staini non4stainingng- resilient resilient supports. supports. C. Place stored stored units so identific identification ation mar0s mar0s are clearl visiblevisible- and product product can be inspected. inspected. ,. ,eliver all architectural architectural precast concrete units to the the project site site in such quantities quantities and at such times to assure compliance with the agreed project schedule and proper setting sequence so as to limit unloading units temporaril on the ground. . )andle and transpor transportt units in a position position consiste consistent nt with their their shape and design design in order to to avoid e5cessive stresses which would cause crac0ing or damage. 8. +ift and and support support units onl onl at designat designated ed points shown on the the Shop ,rawings ,rawings.. G. Place non4staini non4staining ng resilient resilient spacers spacers of even thic0ness thic0ness between each unit. unit. ). Support units units during shipment shipment on non4staini non4staining ng shoc0 absorbing absorbing material. material. 1. SEQUEN SEQUENCIN CING G
Coordination and responsibilit for suppl of items to be placed on or in the structure to allow place4 ment of precast concrete units depends on tpe of structure and vari varies es with local practice. Clearl specif responsibilit for for suppl and installation installation of hardware. !f not supplied b precast concrete fabricator- supplier supplier should be listed and requirements included in related trade sections. When the building frame is structural steelsteel- erection hardware welded to the steel frame should be supplied and installed as part of the structural steel. steel. nsure that tpe and quantit of hardware items to be cast into precast concrete units for use of other trades are specified specified or detailed in contract drawings and furnished to fabricator- with instructions- in a timel manner in order not to dela the Wor0. Wor0. '. 8urnish 8urnish loose connection connection hardware hardware and anchorage items items to be embedded in or attached to other construction without delaing the Wor0. Wor0. Provide setting diagrams- templates- instructionsinstructions- and directions- as required- for installation. PA"T 6 $ P"O:?CTS 2.1 FABRICAT FABRICATORS ORS
,elete this 'rticle 'rticle unless naming fabricators. See www.pci.org www.pci.org for current PC!4certified plant listings. '.'vailable 8abricators2 Subject to compliance with requirements- fabricators offering '.'vailable offering products that ma be incorporated into the Wor0 include- but are not limited to- the following2 >
(etain above for nonproprietar or below for semiproprietar semiproprietar specification. !f above is retainedinclude procedure for approval of other fabricators in !ns !nstructions tructions to 1idders. (efer to ,ivision / Section 6Product (equirements.7 1. 8abricators 8abricators22 Subject Subject to compliance compliance with requirem requirementsents- provide provide products products b one of the followin following2 g2 /. &Insert faricators@ names and product desi'nations for acceptale manufacturers!) 2.2 MOLD MATERIAL MATERIALS S
'. ;olds2 (igid- dimensionall dimensionall stablestable- nonabsorptive nonabsorptive materialmaterial- warp and buc0le free- that that will will provide continuous and true precast concrete surfaces within fabrication tolerances indicated? non4 reactive with concrete and suitable for producing required finishes. /. ;old4(elea ;old4(elease se 'gent2 'gent2 Commercial Commerciall l produced produced liquid4r liquid4releas eleasee agent that that will will not bond bond withwithstain or adversel affect precast concrete surfaces and will not impair subsequent surface or joint treatments of precast concrete. ,elete below if form liners are not used. 8orm liners ma be used to achieve a special off4the4form finish or to act as a template for thin or half bric0 bric0 facings. (evise to add description if particular form liner is selected. 1. 8orm +iners2 +iners2 *nits of face face designdesign- te5turete5ture- arrangem arrangementent- and configurati configuration on 2indicated 2to match bac0ing and form supports to ensure precast concrete desi'n reference sample! Provide solid bac0ing that form liners remain in place during concrete placement. *se with manufacturers recommended liquid4release agent that will not bond with- stain- or adversel affect precast concrete surfaces and will not impair subsequent surface or o r joint treatments of precast concrete. ,elete below if not using retarder to help obtain o btain e5posed aggregate finish. C. Surface Surface (etarder2 (etarder2 Chemical Chemical set retarde retarderr capable of tempor temporaril aril delai delaing ng hardening hardening of newl placed concrete mi5 to depth of reveal specified.
2.3 REINFORCIN REINFORCING G MATERIAL MATERIALS S
Select onl one of the paragraphs and subparagraphs below to suit steel reinforcement requirements. !f retaining 6Performance (equirements7 'rticle- consider reviewing selections with fabricators. '. (einforcing (einforcing 1ars2 'ST; 'ST; ' 9/&- Grade Grade 9#9#- deformed. deformed. (etain paragraph below for reinforcement that is welded or if added ductilit is sought. 1.+ow4'llo4Steel 1. +ow4'llo4Steel (einforcing 1ars2 'ST; ' :#9- deformed. The presence of chromate film on the surface of the galvaniBed coating is usuall visible as a light ellow tint on the surface. 'ST; 1 3#/ describes a test m method ethod for determining the presence of /#
chromate coatings. *se galvaniBing where corrosive corrosive environment or severe e5posure conditions conditions justif e5tra cost. C.GalvaniBed C. GalvaniBed (einforcing 1ars2 'ST; ' :9:- Class !! Binc coatedcoated- hot4dip galvaniBed and chromate wash treated after fabrication and bending- as follows2 Select tpe of reinforcement to be galvaniBed from subparagraph below. /. St Stee eell (ein (einfo forc rcem ement ent22 2AST8 A =#5, Grade =0 2AST8 A /0=, deformed. *se epo5 coating where corrosive environment or severe e5posure conditions justif e5tra cost. 'ST; '::& '::& is a bendable coating while 'ST; '>$% is a non4bendable coating. po5 coated reinforcement is not recommended as crac0 control reinforcement. ,.po54Coated (einforcing 1ars2 'ST; ' ::& or 'ST; ' >$%- as follows2 Select tpe of reinforcement to be epo5 coated from subparagraph below. /. St Stee eell (ein (einfo forc rcem ement ent22 2AST8 A =#5, Grade =0 2AST8 A /0=, deformed. . Steel 1ar ;ats2 'ST; ' /<%- assembled with clips- as follows2 Select tpe of reinforcement for mat fabrication from subparagraph below. /. St Stee eell (ein (einfo forc rcem ement ent22 2AST8 A =#5, Grade =0 2AST8 A /0=, deformed bars. Select onl one of the paragraphs and subparagraphs below to suit steel reinforcement requirements. !f retaining 6Performance (equirements7 'rticle- consider reviewing selections with fabricators. 8. Plain4Steel Welded Welded Wire Wire (einforcement2 'ST; ' /<&- fabricated from 2as+dra*n 2'al(ani1ed and chromate *ash treated steel wire into flat sheets. G.,eformed4Steel Welded Welded Wir Wiree (einforcement2 'ST; ' %>:- flat sheet. ).po54Coated4Steel Welded Welded Wire (einforcement2 'ST; ' <<% Class ' coated- 2plain 2deformed- flat sheet- 2T.pe # endale coatin' 2T.pe 6 non+endale coatin'! !. Supports2 Suspend reinforcement from bac0 of mold mold or use bolstersbolsters- chairschairs- spacers- and other devices for spacing- supporting- and fastening reinforcing bars and welded wire reinforcement in place according to PC! ;N+ //:. //:.
2.4 PRESTRESSIN PRESTRESSING G TENDONS TENDONS
(etain this 'rticle if precast concrete units will be prestressed- either pre4tensioned or post4 tensioned. 'ST; ' %/9 establishes low4rela5ation strand as the standard //
'. Prestressing Strand2 'ST; ' %/9- Grade 3:#- uncoated- :4wire- low4rela5ation low4rela5ation strand. strand. 1. *nbonded Post4Tension Post4Tension Strand2 'ST; '%/9 with corrosion corrosion inhibitor inhibitor conforming to 'ST; ,/:%$- Grade 3:#- :4wire: 4wire- low4rela5ation strand with polproplene conduit sheath. 2.5 CONCRETE CONCRETE MATERIAL MATERIALS S
,elete materials below not required. required. (evise to suit suit Project. '. Portland Portland Cement2 Cement2 'ST; 'ST; C/&#C/&#- T Tpe ! or or !!!. !!!. Select portland cement color from options in subparagraph below. ;i5ing with white cement will improve color uniformit of gra cement. White cement has greater color color consistenc than gra cement and should be used for pastel pastel colors. 8or dar0er colors- the variations variations of gra cement have less effect on the final color hue. /. 8or surface surfacess e5posed e5posed to view in finishe finished d structure structure-- use 2'ra. 2and 2*hite- same tpe- brandand mill source throughout the precast concrete production. 3. Standard Standard gra Portl Portland and cement cement ma be used for for non4e5posed non4e5posed bac0up bac0up concrete concrete.. 1. Supplementar Supplementar Cementiti Cementitious ous ;aterials. ;aterials. Select mineral or cementitious admi5tures from four paragraphs paragraphs below. Where appearance is an important factor- it is recommended that fl ash- silica fume and ground slag not be permitted. /. 3. $. %.
8l 'sh 'sh 'dmi5t 'dmi5ture2 ure2 'ST; 'ST; C 9/<- Class Class C or 8 with with ma5imum ma5imum loss on igniti ignition on of $ percent. percent. ;eta0ao ;eta0aoli lin n 'dmi 'dmi5tu 5ture2 re2 'ST; 'ST; C 9/<- Class Class N. N. Silica Silica 8ume 'dmi5tur 'dmi5ture2 e2 'ST; C /3%# with with optional optional chemica chemicall and phsical phsical requir requirement ement.. Ground Granulated Granulated 1last48urna 1last48urnace ce Slag2 Slag2 'ST; 'ST; C><>C><>- Grade Grade /## or /3#. /3#.
'ST; $$ limits deleteriousClass substances in coarse aggregate depen ding for depending on climate severit and in4 service C location of concrete. &S is the most most restrictive restricti ve designation architectural concrete e5posed to severe weathering. PC! ;N+ //: //: establishes stricter limits limits on deleterious substances for fine and coarse aggregates. 1. Normal4Weight Normal4Weight 'ggregates2 'ggregates2 5cept as modified b PC! PC! ;N+ //:- 'ST; C $$- with coarse aggregates compling with Class &S. Provide and stoc0pile fine and coarse aggregat aggregates es for each tpe of e5posed finish from a single source @pit or quarrA for entire project. (evise subparagraph below and add descriptions of selected coarse4 and fine4face mi5 aggregate colors- siBes- and sources if required. /. 8ace4;i5 8ace4;i5 Coarse Coarse 'ggrega 'ggregates2 tes2 SelectedSelected- hardhard- and durable? durable? free free of materi material al that reacts reacts with cement or causes staining? to match selected finish sample.
/3
(etain one option from first subparagraph below or insert gradation and a nd ma5imum aggregate siBe if 0nown. 8ine and coarse aggregates are not alwas alwas from same same source. a. Gradati ation2 2?niforml. 'raded 2Gap 'raded 2To match desi'n reference sample. 3. 8ace4;i5 8ace4;i5 8ine 'ggregates 'ggregates22 SelectedSelected- natural natural or manufac manufactured tured sand sand of the the same same material material as coarse aggregate- unless otherwise approved b 'rchitect. ,elete paragraph below when architectural requirements dictate that face4mi5 be used throughout. C. 1ac0up Concrete Concrete 'ggregat 'ggregates2 es2 'ST; 'ST; C$$ C$$ or or C$$#. +ightweight aggregates in a face4mi5 are not recommended in cold or humid climates @if e5posed to the weatherA unless their performance has been verified v erified b tests or records of previous satisfactor usage in similar environments. environments. !f normal4weight aggregates are are used in face4mi5- lightweight lightweight aggregates in bac0up are not recommended due to bowing potential. ,. +ightweight 'ggregates2 'ggregates2 5cept as modified b PC! ;N+ //:- 'ST; C $$# with with absorption less than // percent. ,elete first paragraph below if coloring admi5ture is not required. required. 'dd color selection if 0nown. . Coloring Coloring 'dmi5 'dmi5ture2 ture2 'ST; C >:>>:>- snthetic snthetic or natural natural mineral4o5i mineral4o5ide de pigments pigments or colored colored water4 water4 reducing admi5tures- temperature stable and non4fading. 8. Water2 Water2 Potable? free from deleterious deleterious material material that ma affect affect color stabilitstabilit- settingsetting- or strength of concrete and compling with chemical che mical limits of PC! ;N+ // //:. :. ,elete paragraph below if air entrainment is not required. 'ir entrainment entrainment should be required to increase resistance to freeBing and thawing where environmental conditions dictate. G. 'ir ntraining ntraining 'dmi5ture2 'dmi5ture2 'ST; C 39#- certified b manufacturer to to be compatible with other required admi5tures. 'dd tpes of chemical admi5tures- if 0nown- or limit tpes if required. required. Water4reducing Water4reducing admi5turesTpes T pes '- - and ,- or a high4range water reducer- Tpe Tpe 8- predominate. ). Water4 Water4(educi (educing ng 'dmi5ture2 'dmi5ture2 'ST; 'ST; C %>%- Tpe Tpe '. !. (etard (etarding ing 'dmi 'dmi5tu 5ture2 re2 'ST; 'ST; C %>%%>%- T Tpe 1. =. Water4 Water4(educi (educing ng and (etarding (etarding 'dmi5tur 'dmi5ture2 e2 'ST; 'ST; C %>%- Tp Tpee ,. H. )igh4(ange- Water4 Water4(educing (educing 'dmi5ture2 'dmi5ture2 'ST; 'ST; C %>%- Tpe Tpe 8. +. )igh4(ange)igh4(ange- Wat Water4 er4(educi (educing ng and (etarding (etarding 'dmi5t 'dmi5ture2 ure2 'ST; 'ST; C %>%- Tpe Tpe G. ;. PlasticiBing 'dmi5ture for 8lowable Concrete2 'ST; C /#/:. /$
N. 'dmi5tures containing calcium chloride or more than #./& percent chloride ions or other salts b weight of admi5ture are not permitted. 2.6 STEEL CONNECTION MAT MATERIALS ERIALS
dit this 'rticle 'rticle to suit Project. 'dd other materials as required. required. '. Carbon4Steel Shapes and Plates2 'ST; ' $9 e5cept silicon silicon @SiA content in the range of # to #.#$I or #./& to #.3&I for materials materials to be galvaniBed. Steel with chemistr conforming to the formula formula Si J 3.&P K #.#> is also acceptable. 1. Carbon4Steel Carbon4Steel )eaded )eaded Studs2 Studs2 'ST; 'ST; ' /#<- Grades Grades /#/< through through /#3#- cold finishe finished d and bearing the minimum mechanical properties for studs as indicated under ;N+ //:- Table $.3.$.? 'WS 'WS ,/./- Tpe ' or 1- with arc shields. C.
Carbon4Steel Plate2 'S 'ST; ' 3<$.
,.
;alleable !ron Castings2 'ST; ' %:. Grade $3&/# or $<.
.
Carbon4Steel Castings2 'ST; ' 3:- Grade *49#4$#.
8.
)igh4Strength- +ow4'llo Structural Ste Steel2 'ST; ' &: &:3 3 e5ce cep pt silico con n @SiA con onttent in the range of # to #.#$I or #./& to #.3&I for materials materials to be galvaniBed. Steel with chemistr conforming to the formula Si J 3.&P K #.#> is also acceptable.
G.
Carbon4Steel Structural Tubing2 'ST; ' &##- Grade 1.
).
Wrought Carbon4Steel 1ars2 'ST; ' 9:&- Grade 9&.
!.
,eformed4Steel Wire or 1ar 'nchors2 'ST; ' %>9 or 'ST; ' :#9.
'ST; ' $#: defines the term 6studs7 to include stud stoc0 and threaded rods. =. Carbon4Steel Carbon4Steel 1olts 1olts and and Studs2 'ST; ' $#:- Grade Grade ' @'ST; 8 &9<;&9<;- Propert Propert Class Class %.9A carbon4steel- he54head bolts and studs? carbon4steel nuts @'ST; '&9$- Grade 'A? and flatunhardened steel washers @'ST; 8<%%A. )igh4strength bolts are used for friction4tpe connections between steel members and are not recommended between steel and concrete since concrete creep and crushing of concrete during bolt tightening reduce effectiveness. H. )igh4Strength 1olts and Nuts2 'ST; ' $3& or 'ST; '%>#- Tpe Tpe /- heav he5 steel structural structural bolts- heav he5 carbon4steel nuts- @'ST; '&9$A '&9$A and hardened carbon4steel washers @'ST; 8%$9A. (etain paragraph and subparagraph below if galvaniBed galvaniBed finish is required. !t is ver important important that /%
the locations of special finishes finishes be clearl defined iin n the specifications or drawi drawings. ngs. 8ield welding should generall not be permitted on galvaniBed elements- unless the galvaniBing is removed or acceptable welding procedures are submitted. submitted. )ot4dip galvaniBed finish provides greater corrosion resistance than electrodeposited Binc coating. lectrodeposition is usuall limited to threaded fasteners. +. 8inish2 8inish2 8or e5terior e5terior steel items items and items indicated indicated for galvaniBing galvaniBing-- appl Binc coating coating b 2hot+dip process accordin' to AST8 A #63, after farication, or AST8 A #53, as applicale 2electrodeposition accordin' to AST8 =33, SC 3, T.pe #and 6. /. GalvaniBing GalvaniBing (epair (epair Paint2 Paint2 )igh4Binc4 )igh4Binc4dust4 dust4conten contentt paint with with dr film film containin containing g not less than than >% percent Binc dust b weight- and compling with ,",4P43/#$&' or SSPC4Paint 3#. (etain paragraph below if paint finish finish is required. required. (evise locations of priming- if required. ;P! :> @8S TT4P499%A TT4P499%A in first option below provides some corrosion protection while SSPC4Paint 3&without topcoating- provides minimal corrosion protection. ;. Shop4Primed 8inish2 Prepare surfaces surfaces of non4galvaniBed steel items- e5cept those surfaces surfaces to be embedded in concrete- according acc ording to requirements in SSPC4SP / followed b SSPC4SP $ and shop4 appl 2lead+ and chromate+free, rust $inhiiti(e primer, compl.in' *ith performance re-uirements in 8PICompl /B 2SSPC+Paint according to SSPC4P' /. N. Welding We lding lectrodes2 with 'WS 'WS 65 standards. 2.7 STAINLESS!STEEL STAINLESS!STEEL CONNECTION MATERIALS MATERIALS
,elete this 'rticle 'rticle if not required. *se when resistance to staining merits e5tra cost iin n par0ing structures and other high moisture or corrosive areas. '. 1.
St Staainless4Steel Plate2 'ST; ' 999 99-- Tpe $#%- of grade sui uittable for ap app plication on.. St Staainless4Steel 1olts an and d Studs2 'ST; 8 &> &>$ $- allo $#% or $/9- he54head bolts and studs? stainless4steel nuts? nuts? and flat- stainless steel washers. +ubricate threaded parts of stainless steel bolts with an anti4seiBe thread lubricant during assembl. assembl.
C. Stainless4Steel )eaded Studs2 'ST; ' 3:9 and bearing the minimum mechanical mechanical properties for studs as indicated under ;N+ //:- T Table able $.3.$. 2. BEARING PADS PADS AND OTHER ACCESSORIES
,elete this 'rticle 'rticle if not applicable. Choice of bearing pad can usuall be left to fabricator? coordinate selection with structural engineer if required. '. Provide Provide bearing pads for architec architectural tural precast precast concrete concrete units as follows2 follows2 /. lastomeri lastomericc Pads2 ''S)T" ''S)T" ; 3&/- plainplain- vulcani vulcaniBedBed- /## percent percent polchloro polchloroprene prene @neopreneA elastomer- molded to siBe or cut from a molded sheet- &# to :# Shore ' durometer according to 'ST; ,33%#- minimum tensile strength 33&# psi per 'ST; , %/3. 3. (andom4"rien (andom4"rientedted- 8iber4 8iber4(einf (einforced orced last lastomeri omericc Pads2 PreformedPreformed- randoml randoml oriented oriented snthetic fibers set in elastomer. elastomer. Surface hardness of :# to ># Shore ' durometer according to /&
'ST; ,33%#. Capable of supporting a compressive compressive stress of $### ps psii with no crac0ingsplitting or delaminating in the internal portions of the pad. $. Cotto Cotton4,uc04 n4,uc048abric 8abric4(ein 4(einforce forced d lastomeri lastomericc Pads2 PreformedPreformed- horiBo horiBontall ntall laered laered cotton4 cotton4 duc0 fabric bonded to an elastomer. Surface hardness of <# to /## Shore ' durometer according to 'ST; ,33%#. Conforming to ,ivision !!- Section /<. /<./#.3 /#.3 of ''S)T" +(8, 1ridge ,esign Specifications- or ;ilitar Specification- ;!+4C4<<3,. %. 8rictionles 8rictionlesss Pads2 Te Tetraf trafluoro luoroethl ethlene ene @teflonA@teflonA- glass4fi glass4fiber ber reinforcedreinforced- bonded bonded to stainless stainless or mild4steel plates- of tpe required for in4service stress. &. )igh4 )igh4,ensit ,ensit Plastic2 Plastic2 ;ultimonom ;ultimonomerer- nonleaching. nonleaching. Select material from options in paragraph below or add another material to suit Project. Coordinate with counterflashing materials and details. d etails. 1. (egl (eglet ets2 s2 2PC etrusions! 2Stainless steel, T.pe T.pe 306 2Copper 2"e'lets and flashin' are specified in :i(ision / Section 9Sheet 8etal ;lashin' and Trim!< felt or fiber filled or cover face opening of slots. C. 'ccessories2 Provide clipsclips- hangers- plastic or steel shimsshims- and other accessories required to install architectural precast concrete units. 2."
GROUT MATERIALS
'dd other proprietar grout sstems sstems to suit Project. Project. Show locations of each grout here or on ,rawings if more than one tpe is retained. '. Sand4Cement Grout2 Portland Cement- 'ST; C /&#- Tpe Tpe !- and clean- natural sandsand- 'ST; 'ST; C /%%- or 'ST; C %#%. ;i5 at ratio of / part cement to 34/E3 parts sand- b volume- with minimum minimum water required for placement and hdration. (etain paragraph below if nonshrin0 grout is required or if cement4grout shrin0age could cause structural deficienc. deficienc. 8or critical installationsinstallations- require manufacturer to provide field supervision. 1. Nonmetallic- Nonshrin0 Grout2 Premi5ed- nonmetallic- noncorrosive- nonstaining grout containing selected silica sands- portland cement- shrin0age4compensating agents- plasticiBing and water4 reducing agents- compling co mpling with 'ST; C //#:- Grade ' ffor or drpac0 and Grades 1 and C for flowable grout and of a consistenc suitable for application within a $#4minute wor0ing time. C. po54resin grout2 grout2 Two4component Two4component mineral4filled mineral4filled epo54resin2 'ST; C<</ of tpe- grade- and class to suit requirements. 2.1# 2.1#
THI THIN AND HALF ALF BRIC BRIC$ $ UNIT UNITS S AND ACCE CCESS SSOR ORIIES
(etain this 'rticle 'rticle if specifing thin veneer bric04faced precast concrete panels. Tpe Tpe T1L bric0 units feature the tightest dimensional tolerances but ma be too dimensionall variable to fit securel within form liner templates. templates. Pre4select bric0 and name prior to bid or establish set cost allowance. !f full4siBe bric0 units are required- use ,ivi ,ivision sion % Section 6*nit ;asonr 's 'ssemblies.7 semblies.7
/9
'. Thin or )alf 1ric0 *nits2 'ST; C3/9- Tpe Tpe 81L or 'ST; C /#<<- Grade 5terior5terior- Tpe Tpe T1L2not less than D inch 23>4 inch 2# inch thic0 with a tolerance of plus # or minus /E/9 inch and as follows2 /. 8ace SiBe2 StandardStandard- 34/E% inches high b < inches inches long. 3. 8ace SiBe2 SiBe2 ;odular;odular- 34/E% inches inches high b :4/E3 :4/E3 to to :4&E< :4&E< inches inches long. $. 8ace SiBe2 SiBe2 ngineer ngineer ;odular;odular- 34$E% to to 34/$E/9 34/$E/9 inches inches high b :4/E3 to :4&E< :4&E< inches inches long. %. 8ace SiBe2 SiBe2 Closure Closure ;odular ;odular-- $4/E3 $4/E3 to $4&E< $4&E< inches inches high b :4/E3 :4/E3 to :4&E< :4&E< inches inches long. &. 8ace SiBe2 SiBe2 *tilit *tilit-- $4/E3 $4/E3 to $4&E< $4&E< inches inches high b //4/E3 //4/E3 to //4&E< //4&E< inches inches long. long. 9. 2here sho*n to 9match eistin',< provide face bric0 matching color- te5ture- and face siBe of e5isting adjacent bric0wor0. a. &Insert information on eistin' ricF if Fno*n!) Show details on ,rawings of special conditions and shapes if required. :. Special Special Shapes2 Shapes2 !nclude !nclude corners corners-- edge edge corners corners-- and end edge corners. corners. Thin bric0 units with higher rates of absorption than values in first subparagraph below should be wetted before placing concrete to improve improve bond. 1efore retaining paragraph- verif that that thin bric0 selected complies with requirements. <.
!nit !nitia iall (ate (ate of 'bs bsor orpt ptio ion2 n2 +e +ess ss than than $# $#gE gE$# $# sq. sq. in in.. pe perr mi minu nute te when when te test sted ed pe perr 'ST; ST; C 9:.
>.
ffl fflor ores esce cenc nce2 e2 Pr Prov ovid idee bric bric0 0 that that ha hass be been en te test sted ed ac acco cord rdin ing g to 'ST; ST; C 9: an and d is ra rate ted d 6not effloresced.7
,elete subparagraph below if surface4colored bric0 is not used. /#. Surface Coloring2 1ric0 with surface coloring- other than flashed or sand4finished bric0bric0- shall withstand &# ccles of freeBing and thawing per 'ST; C 9: with no observable difference in the applied finish when viewed from /# feet. "ptions in subparagraph below are e5amples of descriptive requirements for appearance where a proprietar specification cannot be used. !f approving a color range for bric0- view /## square feet of loose bric0s or a completed building. dit to suit Project or delete if bric0 is sspecified pecified b product name. //. 8ace Color and Te5t Te5ture2 ure2 28atch Architect@s samples 28edium ro*n, *ire cut 2;ull+ ran'e red, sand molded 2Gra., (elour! (etain first subparagraph below- deleting inapplicable descriptions if required. /3. 1ac0 Surface Te5ture2 Te5ture2 Scored- combed- wire roughened- ribbed- 0ebac0ed or dovetailed. /$. 'vailable 'vailable Products2 Subject to compliance with requirements- products that ma be incorporated into the Wor0 include- but are not limited to- the following2 (etain subparagraph above for nonproprietar or subparagraph below for semiproprietar Specification. (efer to ,ivision ,ivision / Section 6;aterials and quipment.7 quipment.7 /:
/%. Products2 Subject to compliance with requirements- provide provide one of the following2 a! &Insert manufactu manufacturers@ rers@ names and and product product desi'nations desi'nations for for acceptale acceptale fac facee ricF!) (efer to 'merican National Standards !nstitute @'NS!A ' /$:./ for the commonl available siBes and shapes- phsical properties- the basis for acceptance and methods of testing. 1. GlaBed and and *nglaBed *nglaBed Ceramic Ceramic Tile Tile *nits2 *nits2 'NS! ' /$:./ 2not less than 3> inch /. 1od of glaBed glaBed tile tile shall have have a water absorpt absorption ion of less less than $ percent percent using using 'ST; 'ST; C$:$. C$:$. 3. ;anufacture ;anufacturerr shall shall warrant warrant materia materials ls as frost4resi frost4resistant stant.. $. GlaBed GlaBed units units shall shall confo conform rm to 'ST; 'ST; C/39. C/39. C. 'rchitectural Terra Terra Cotta Cotta *nits2 Compl with requirements of 'rchitectural Terra Terra Cotta Cotta manufacturers standards standards for the application indicated. (etain paragraph below if mortar setting bric0 unit joints before placing precast concrete mi5. ,. Setting ;ortar2 Portland cement- 'ST; C /&#- Tpe Tpe !- and clean- natural sand- 'ST; 'ST; C /%%. ;i5 at ratio of / part cement to % parts sand- b volume- with minimum water required for placement. ,elete paragraph and subparagraphs below if not filling thin bric0 unit joints with pointing grout after precast concrete panel production. . +ate54Portl +ate54Portland and Cement Pointing Pointing Grout2 Grout2 'NS! 'NS! '//<. '//<.9 9 and as follows2 Select one or both tpes of o f grout from first two subparagraphs below. /. ,r4grout ,r4grout mi5turemi5ture- factor factor preparedprepared- of portland portland cementcement- graded graded aggregateaggregate- and drdrredispersible- ethlene4vinl4acetate additive for mi5ing with water? uniforml colored. 3. Commercial Commercial portland portland cement cement grout- factor factor prepared prepared-- with liquid liquid strene4but strene4butadiene adiene rubber rubber or acrlic4resin late5 additive? uniforml colored. $. Colors2 2As indicated . manufacturer@s desi'nations 28atch Architect@s samples 2As selected . Architect from manufacturer@s full ran'e.
8. Se Sett ttin ing g Sst Sstem emss (etain paragraphs below if thin bric0- ceramic tile- or full bric0 will be laid after casting of panel. /. Thin bric0 and Ceramic Tile Tile *nits2 *nits2 2:r.+Set 8ortarH ANSI A##!# 2%ate+Portland Cement 8ortarH ANSI A ##!4 ##!4 3. 8ull 1ric0 *nits2 !nstall &Gal(ani1ed) &T.pe 304 stainless steel) dovetail slots in precast2 not less than #.& mm thic0- felt or fiber filled filled or cover face opening of slots. 'ttach bric0 units with wire anchors- 'ST; 'ST; '<3 '<3 or 133:- Grade $#)S not less than $E/9 inch @W3.<A in diameter and hoo0ed on one end and looped through a :E< in. wide- /34gage steel sheet bent over the wire with dovetail on opposite end. 2.1 .11 1
STONE MATERIALS AND ACCESSORIES
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(etain this 'rticle 'rticle if stone facing is required. ;aterial- fabrication- and finish requirements are usuall specified in ,ivision ,ivision % Section 6,imension Stone Cl Cladding.7 adding.7 (eplace first paragraph below with stone requirements- if preferred. '. Stone facing for for architectural precast concrete is specified specified in ,ivision ,ivision % Section 6,imension 6,imension Stone Cladding.7 /. Toler Toleranc ancee of length length and width width of J#J#- 4/E< 4/E< inch. inch. 'nchors are generall supplied b stone fabricator or- in in some cases- b precaster. Specif supplier. 'nchors ma be toe4in- toe4out- or dowels. 1. 'nchors2 Stainless steelsteel- 'ST; 'ST; ' 999- Tpe Tpe $#%- of temper temper and diameter diameter required to support loads without e5ceeding allowable design stresses. Grommets will usuall be required if filling dowel holes with rigid epo5. /. 8it each anchor anchor leg with with 9# durometer durometer neoprene neoprene grommet grommet collar collar of width width at least least twice twice the diameter and of length at least five times the diameter of the anchor. C. Sealant Sealant 8iller2 8iller2 'ST; 'ST; C >3#- low4modulus low4modulus-- multicompone multicomponentnt- nonsag urethane urethane sealant sealant compling compling with requirements in ,ivision : Section 7=oint Sealants7 and that is nonstaining to stone substrate. ,owel hole filling is used to prevent water intrusion into stone and a nd future discoloration at anchor locations. (etain paragraph above for a fle5ible filler or paragraph below for a rigid filler. filler. ,. po5 8iller2 'ST; C <</- /## percent solids- sand sand filled filled non4shrin0ing- non 4staining 4staining of tpeclass- and grade to suit application. . 1ond 1ond 1rea 1rea0e 0er2 r2 /. PreformedPreformed- compressi compressibleble- resilientresilient- nonstaini nonstainingng- nonwa5ingnonwa5ing- closed4cell closed4cell polethl polethlene ene foam padnonabsorbent to liquid and gas- /E< inch thic0. 3. Polet Polethl hlene ene sheet sheet-- 9 to to /# mil mil thic thic0. 0. 2.12
INSULATED PANEL ACCESSORIES
(etain this 'rticle 'rticle if insulated- architectural precast concrete panels are required. State desired minimum aged (4value or thic0ness thic0ness required- or both. Select insulation material ffrom rom one of the three following paragraphs? if using more then one tpe identif location. '. 5panded4Polstrene 1oard !nsulation2 (igid- cellular polstrene thermal insulation compling with 'ST; C&:< formed b e5pansion of polstrene base resin? &s-uare ed'es) &ship+lap ed'es)? with (4value of &state (alue) and thic0ness of &state thicFness).
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1. 5truded4Pol 5truded4Polst strene rene 1oard !nsulation !nsulation22 (igid cellular cellular polstr polstrene ene thermal insulat insulation ion compling compling with 'ST; C&:< formed from polstrene base b an e5trusion process? &s-uare ed'es) &ship+ lap ed'es)? with (4value of &state (alue) and thic0ness of &state thicFness). C. Polisocanurate 1oard !nsulation2 (igid- cellular cellular polisocanurate polisocanurate thermal insulation? compling with 'ST; C &>/? square edged? with (4value of &state (alue) and thic0ness of &state thicFness). Select wthe connectors from paragraph below. ,. Wthe Wthe Connectors2 &Glass+fier and (in.l+ester pol.mer connectors) - &pol.prop.lene pin connectors) - &stainless+steel pin connectors)- &ent 'al(ani1ed reinforcin' ars or 'al(ani1ed *elded *ire trusses)- &c.lindrical metal slee(e anchors)- manufactured to connect wthes of precast concrete panels. 2.13
CONCRETE MI%ES
'. Prepare design mi5es to match 'rchitects 'rchitects sample sample for each tpe tpe of concrete required. (evise subparagraph below if fl fl ash- blast furnace slag- or silica fume are not permitted. (evise percentage to suit Project. /. +imit use of fl fl ash and granulated blast4furnace slag slag to 3# percent replacement of port portland land cement b weight? meta0aolin and silica fume to /# percent of portland cement b weight. 1. ,esign mi5es mi5es ma be prepared b a qualified qualified independent independent testing testing agenc or b qualified qualified precast plant personnel at architectural precast concrete fabricators option. option. C. +imit +imit water4solubl water4solublee chloride ions ions to the ma5imum percentage percentage b weight weight of cement permitted permitted b 'C! $/< or PC! ;N+ //: when tested in accordance with 'ST; C/3/<. 'rchitectural precast concrete units ma be manufactured with a separate 6architectural7 face mi5 and a 6structural7 bac0up mi5. 8ace and bac0up mi5es should have simi similar lar shrin0age and e5pansion coefficients. Similar water4cementitious water4cementitious materials ratios ratios and cement4aggregate ratios are recommended to limit bowing or warping. ,. Normal4Weight Normal4Weight Concrete Concrete 8ace and 1ac0up ;i5es2 Proportion mi5es b either laborator trial batch or field test data methods according to 'C! 'C! 3//./- with material materialss to be used on project- to provide normal4weight concrete with the following properties2 (etain subparagraph below or revise to suit Project. )igher4strength mi5es ma be available? verif with fabricators. /. Compre Compressi ssive ve Stre Strengt ngth h @3< @3< ,asA2 ,asA2 &### &### psi. psi. ' water4cementitious water4cementitious materials ratio of #.%# to #.%& is usual for architectural precast concrete. +ower ratios ma be possible possible with use of high4range high4range water reducers. (evise ratio as required. required. 3. ;a5imum ;a5imum Water4C ater4Cementi ementitious tious ;aterials ;aterials (atio2 (atio2 #.%&. 3#
Water absorption indicates susceptibilit to weather st Water staining. aining. The limit in paragraph belowcorresponding to 9 percent b weight- is suitable for average e5posures. ,ifferent parts of a single panel cannot be produced with different absorptions. Deri erif f that fabricator can produce units with lower water absorption because special consolidation techniques to increase concrete densit are required. . Water Water 'bsorpt 'bsorption2 ion2 9 percent percent b weight weight or /% percent percent b volumevolume- tested tested according according to to PC! ;N+ ;N+ //:. +ightweight bac0up mi5es must be compatible with normal4weight face mi5es to minimiBe bowing or warping. (etain lightweight concrete bac0up mi5es if required or as an opt option ion if satisfactor satisfactor durabilit and in4service performance are verified b fabricator. 8. +ightweight +ightweight Concret Concretee 1ac0up ;i5es2 ;i5es2 Proportion Proportion mi5es mi5es b either either laborator laborator trial trial batch batch or field field test data methods according to 'C! 3//.3- with materials to be used on Project- to provide lightweight concrete with the following properties2 (etain subparagraph below or revise to suit Project. )igher4strength mi5es ma be available? verif with fabricators. /. Compre Compressi ssive ve Stre Strengt ngth h @3< @3< ,asA2 ,asA2 &### &### psi. psi. !ncrease or decrease unit weight as required. Coordinate with lightweight4aggregate ssupplier upplier and architectural precast concrete fabricator. fabricator. +ightweight concretes with lightweight lightweight and normal4weight aggregate in mi5 will usuall be heavier than unit weight below. 3. *nit Wei Weight2 ght2 Calculated Calculated equilibr equilibrium ium unit weight weight of //& //& lbEcu.ft. lbEcu.ft.-- plus or minus minus $ lbEcu.ft lbEcu.ft..according to 'ST; C &9:. G. 'dd air4entra air4entraining ining admi5ture admi5ture at manufacture manufacturers rs prescrib prescribed ed rate to result result in concrete at point of placement having an air content compling with PC! ;N+ //:. //:. ). When included included in design design mi5esmi5es- add other other admi5tures admi5tures to to concrete concrete mi5es accordi according ng to manufacturers written instructions. 2.14
MOLD FABRICATION
'. ;olds2 'ccuratel construct moldsmolds- mortar tight- of sufficient strength to to withstand withstand pressures due to concrete4placement and vibration operations and temperature changes and for prestressing and detensioning operations. Coat contact surfaces of molds with release agent before before reinforcement is placed. 'void contamination of reinforcement reinforcement and prestressing tendons b release agent. ,elete form liners unless needed to produce e5posed e5 posed surface finish.
3/
/. Place form form liners liners accurat accuratel el to provide provide finis finished hed surface surface te5ture te5ture indicat indicated. ed. Provide Provide solid solid bac0ing and supports to maintain stabilit of liners during placing of concrete. Coat form liner with form4release agent. 1. ;aintain ;aintain molds to provide completed completed archi architectur tectural al precast concrete concrete units of shapes- lineslines- and dimensions indicated- within fabrication tolerances specified. /. 8orm joints joints are not not permitted permitted on faces faces e5posed e5posed to view view in the finishe finished d wor0. Select one option from below? show details on ,rawings or revise description to add dimensions. Sharp edges or corners of precast concrete conc rete units are vulnerable to chipping. 3. dge dge and and Corner Corner Treat Treatmen ment2 t2 *nifor *niforml ml 2chamfered 2radiused. 2.15
THIN AND HALF BRIC$ BRIC$ FAC FACINGS INGS
(etain this 'rticle 'rticle if using thin or half bric0 facings on architectural precast concrete units. '. Place form liner liner templates templates accuratel accuratel to provide grid for bric0 facings. facings. Provide solid solid bac0ing and supports to maintain stabilit of liners while placing bric0s and during placing of concrete. 1. Securel Securel place bric0 units units face down into form liner liner poc0ets poc0ets and place precast concrete concrete bac0ing bac0ing mi5. C. Clean faces and joints joints of bric0 bric0 facing. facing. 2.16 2.1 6
STONE STONE FACINGS CINGS
(etain this 'rticle 'rticle if stone facing is required. (efer to ,ivision % Section 6,imensional Stone Cladding7 for precast veneer. ven eer. '. 'ccuratel position stone facings to compl with requirements. requirements. !nstall spring clips- anchorssupports- and other attachments indicated indicated or necessar to secure stone in place. Set stone facings accuratel- in locations indicated on Shop ,rawings. "rient stone veining in di direction rection indicated on Shop ,rawings. Heep reinforcement a minimum of M inch from the the bac0 surface of stone. *se continuous spacers to obtain uniform joints of widths indicated and with edges and faces aligned according to established relationships relationships and indicated tolerances. nsure no passage of precast matri5 to stone surface. 1. See ,ivision ,ivision : Section Section 6=oint Sealants7 Sealants7 for furnishing furnishing and installing installing sealant bac0ings bac0ings and sealant into stone4to4stone joints and stone4to4concrete joints. 'ppl a continuous sealant sealant bead along both sides and top of precast panels at the stoneEprecast interface using the bond brea0er as a joint filler bac04up. ,o not seal panel bottom edge. (etain one of two subparagraphs below if sealing dowel holes. *se sealant if a fle5ible filler is required? use epo5 if a rigid filler is required. /. 8ill anchor anchor holes holes with low low modulus modulus polurethan polurethanee sealant fille fillerr and install install anchors. anchors. 33
3. 8ill anchor anchor holes holes with epo5 epo5 filler filler and instal installl anchors with inch inch long 9# duromet durometer er elastomeric sleeve at the bac0 surface of the stone. PC! recommends preventing bond between stone facing and precast concrete to minimiBe bowingcrac0ing- and staining of stone. (etain one of two subparagraphs bel below. ow. $. !nstall !nstall 9 to /# mil mil polethlen polethlenee sheet to prevent prevent bond between between bac0 bac0 of stone stone facing facing and concrete substrate. %. !nstall !nstall /E< inch inch polethl polethlene4foam ene4foam bond bond brea0er brea0er to prevent prevent bond between between bac0 bac0 of stone facing facing and concrete substrate. ;aintain minimum projection projection requirements of stone anchors iinto nto concrete substrate. PC! recommends anchor spacing be determined determined prior to bidding. (etain below if precaster is to test stone anchors for shear and tension. 'ST; %<< is preferred as 'ST; C/$&% does not include the influence of the precast concrete bac0up. C. Stone 'nchor Shear and Tensile Tensile Testing2 Testing2 ngage a certified testing testing laborator laborator acceptable to the 'rchitect to evaluate and test the proposed stone anchorage sstem. Test Test for shear and tensile strength of proposed stone anchorage sstem s stem in accordance with 'ST; %<< or 'ST; C /$&% modified as follows2 /. Prior to to testingtesting- submit submit for approval approval a description description of the test test assembl assembl @includi @including ng pertinent pertinent data on materialsA- test apparatus and procedures. 3. Te Test st /34b4/3 /34b4/3 inch samples samples of stone affi5ed affi5ed to testing testing apparatus apparatus through proposed proposed anchorages. anchorages. Provide 3 sets of 9 stone samples each. "ne set for shear load testing and the other set for tensile load testing. $. Te Test st stone stone anchors anchors of the siBes siBes and shapes shapes proposed proposed for the installat installation. ion. a. Test Test the assembl to failure and record the test load at fail failure. ure. (ecord the tpe of failureanchor pull4out or stone brea0age- and an other pertinent information- in accordance with the requirements of 'ST; %<<. !n addition- submit load deflection deflection curves curves of each test test assembl. ,. ;inimum ;inimum 'nchor 'nchor Spacing2 Spacing2 'nchor 'nchor spaced spaced not less than than 9 inches from an edge edge with not more more than 3% to $# inches between anchors depending on the local building code and wind loading. 2.17 2.1 7
FABRICA BRICATI TION ON
'. Cast4in 'nchors- !nserts- Plates- 'ngles- and "ther 'nchorage )ardware2 8abricate anchorage hardware with sufficient anchorage and embedment to compl co mpl with design requirements. 'ccuratel position for attachment of loose hardware and secure in place during precasting operations. +ocate anchorage hardware where it does not affect position of main reinforcement or concrete placement. /. Weld Weld headed studs studs and deformed deformed bar anchors anchors used for anchorag anchoragee according according to 'W 'WS ,/./ and 'WS 'W S C&.%- 6(ecommended Practices for Stud Welding.7 Welding.7 Coordinate paragraph below with ,ivision & Section 6;etal 8abrications7 for furnishing and installing loose hardware items. 3$
1. 8urnish 8urnish loose hardware items items including including steel platesplates- clip angles- seat anglesangles- anchors- dowelsdowelscramps- hangers- and other hardware shapes for securing architectural precast concrete units to supporting and adjacent construction. C. Cast4in Cast4in regletsreglets- slots- holes- and other accessorie accessoriess in architectural architectural precast precast concrete units units as indicated on contract drawing. ,elete first paragraph below if not applicable. ,. Cast4in Cast4in openings openings larger larger than /# /# inches in in an dimension. dimension. ,o not drill drill or cut openings openings or or prestressing strand without approval of 'rchitect. . (einforceme (einforcement2 nt2 Compl Compl with recomme recommendatio ndations ns in PC! ;N+ ;N+ //: //: for fabric fabrication ation-- placingplacing- and supporting reinforcement. /. Clean reinforce reinforcement ment of loose loose rust and mill mill scale- earthearth- and other materia materials ls that reduce reduce or destro the bond with concrete. When damage to epo5 coated reinforcing e5ceeds llimits imits specified 'ST; '::& '::& repair with patching material compatible with coating material and 3. epo5 'ccuratel 'ccuracoat tel bar positionposiends tion-after supportsuppcutting. ort- and secure secure reinforcement reinforcement against against displacemen displacementt during concrete4 concrete4 placement and consolidation operations. Completel conceal support devices to prevent e5posure on finished surfaces. $. Place reinforci reinforcing ng steel and prestre prestressing ssing strand strand to maintain maintain at least least $E% 4inch minimum minimum concrete concrete cover. !ncrease cover requirements for reinforcing steel to /4/E3 inche when units are e5posed to corrosive environment or severe severe e5posure conditions. 'rrange- space- and securel tie bars and bar supports to hold reinforcement reinforcement in position whil whilee placing concrete. ,irect wire tie tie ends awa from finished- e5posed concrete surfaces. %. !nstall !nstall welded welded wire reinforce reinforcement ment in lengths lengths as long as practic practicable. able. +ap adjoining adjoining pieces pieces at least one full mesh mesh spacing and wire tie laps- where required b design. "ffset laps laps of adjoining widths to prevent continuous laps in either direction. 8. (einforce (einforce architectura architecturall precast concrete concrete units to resist handlinghandling- transportat transportationion- and erection stresses. ,elete paragraph and subparagraph below be low if prestressed architectural precast concrete units are not required. "ption to prestress ma be left to fabricator fabricator if objective is to aid handling and to control crac0ing of units during installation. G. Prestress tendons tendons for architectural precast concrete units b either pretensioning or post4tensioning methods. Compl with PC! ;N+ //:. (evise release or post4tensioning strength in subparagraph below to an actual compressive strength if required. ' release strength as low as 3&## psi for normal4weight concrete and $### psi for lightweight concrete is permitted.
3%
/.
,ela detensioning or post4tensioning of prestressed architectural precast concrete units until concrete has reached its indicated minimum design release compressive strength as established b test clinders cured under the same conditions as concrete member. 3. ,etension pretensioned tendons either b graduall releasing tensioning jac0s or b heat4 cutting tendons- using a sequence and pattern to prevent shoc0 or unbalanced loading. $. !f concrete has been heat cured- detension while concrete is still warm and moist to avoid dimensional changes that ma cause crac0ing or undesirable stresses. %. Protect strand ends and anchorages with bituminous- Binc4rich or epo5 paint to avoid corrosion and possible rust spots. ). ;i5 concrete according to PC! ;N+ //: and requirements in this Section. 'fter concrete batching- no additional water ma be added. (etain paragraph below if a separate face mi5 is required or is Contractors option. !. Place face face mi5 to a minimum minimum thic0ness thic0ness after after consoli consolidatio dation n of the greater greater of / inch inch or /.& times times the ma5imum aggregate siBe- but not less than the minimum reinforcing cover as indicated on con contract tract drawings. /. 't fabricato fabricators opt either either of the foll mi5 mi5 designEcasti designE casting ng techniques techniques ma be used2 a. the ' single singl e design desirs gnoption mi5 miion 5 throughout throu ghout the thefollowing entire entowing ire thic0nes thic0ness s of panel. panel. b. ,esign mi5es for facing and bac0up? using cement and aggregates for each tpe as indicated- for consecutive placement in the mold. *se cement and aggregate specified for facing mi5- use cement and aggregate ag gregate for bac0up mi5 compling with criteria specified as selected b the fabricator. =. Place concrete concrete in a continu continuous ous operation operation to prevent prevent seams seams or planes planes of wea0ness wea0ness from from forming forming in precast concrete units. Compl with requirements in PC! ;N+ //: for measuring- mi5ingtransporting- and placing concrete. /. Place bac0up bac0up concret concretee to ensure ensure bond with with face face mi5 concrete. concrete. H. Thoroughl consolidate placed concrete b internal andEor e5ternal vibration without without dislocating dislocating or damaging reinforcement and built4in items- and minimiBe pour lines- honecombing or entrapped air on surfaces. *se equipment and procedures compling compling with PC! ;N+ //:. /. Place self4conso self4consolidat lidating ing concrete concrete without vibration vibration in accordance accordance with PC! !nterim !nterim Guid Guideline eliness for the *se of Self4Consolidating Concrete. +. Compl Compl with 'C! 'C! $#9./ procedures procedures for for cold4weather cold4weather concret concretee placement. placement. ;. Compl with 'C! $#&( recommendations for hot4weather concrete placement. ". !dentif pic0up points of architectural precast concrete units and orientation in structure with permanent mar0ings- compling with mar0ings indicated on Shop ,rawings. !mprint or permanentl mar0 casting date on each architectural precast concrete unit on a surface that will not show in finished structure. P. Cure concrete- according to requirements in PC! ;N+ / //:/:- b moisture retention without heat or b 3&
accelerated heat curing using low4pressure live steam or radiant heat and moisture. moisture. Cure units until the compressive strength is high enough to ensure that stripping does not have an effect on the performance or appearance of the final product.
F. (epair damaged architectural precast concrete unit unitss to meet acceptabilit rrequirements equirements of PC! ;N+ //:. 2.1 2.1
INSU INSULA LAT TED PANEL NEL CAST CASTIN ING G
,elete this 'rticle 'rticle if integrall insulated panels are not required. '. Cast and and screed screed support supported ed wthe wthe over mold. 1. Place insulati insulation on boards- abuttin abutting g edges and ends of adjacent adjacent boards. boards. !nsert !nsert wthe connector connectorss through insulation- and consolidate concrete around connectors according to connector manufacturers written instructions. C. Cast and and screed screed top wthe wthe to meet meet required required finis finish. h.
2.1"
FABRICA ABRICATIO TION N TOLERANCE TOLERANCES S
'. 8abricate architectural precast concrete units straight straight and true true to siBe siBe and shape shape with e5posed edges and corners precise and true so each finished unit complies with PC! ;N+ //: product tolerances as well as position tolerances for cast4in items. Select paragraph above or paragraph and subparagraphs below. below. *suall retain above unless tolerances tolerances for Project deviate from PC! recommendations. PC! ;N+ // //: : product tolerances- listed below- are standardiBed throughout the industr. industr. 8or architectural trim units such as si sillslls- lintels- coping- cornicesquoins- medallions- bollards- benches- planters- and pavers- tolerances are listed in PC! ;N+ /$&. 1. 8abricate architectural precast concrete units units straight and tr true ue to siBe and shape with e5posed edges and corners precise and true so each finished unit complies with the following product tolerances. /. "verall )eight and W Width idth of *nits*nits- ;easured at the 8ace 5posed to Di Diew2 ew2 's follows2 follows2 a. /# feet or under- Plus or ;inus /E< inch. b. /# to 3# feet- Plus /E< inch- ;inus $E/9 inch. c. 3# to %# feetfeet- Plus or ;inus /E% inch. inch. d. ach additional /# ffeeteet- Plus or ;inus /E/9 inch. inch.
3. "verall )eight and Width Width of *nits- ;easured at the 8ace Not 5posed to Di Diew2 ew2 's follows2 a. /# feet or under- Plus or ;inus /E% /E% inch. b. /# to 3# feet- Plus O inch- ;inus $E< inch. c. 3# to %# feetfeet- Plus or ;inus $E< inch. inch. d. ach additional /# ffeeteet- Plus or ;inus /E< inch. inch. $. To Total tal Thic0ness or 8lange Thic0ness2 Plus Plus O inch- ;inus /E< inch. 39
%. &. 9. :.
(ib Thic0ness2 Plus or ;inus /E< /E< inch. (ib to dge of 8lange2 Plus or ;inus /E< inch. ,istance between (ibs2 Plus or ;inus ;inus /E< inch. Dariation ariation from Square or ,esignated S0ew @,ifference in +ength of the T Two wo ,iagonal ;easurementsA2 Plus or ;inus /E< inch per :3 inches or /E3 inch inch totalwhichever is greater. <. +ength and Wi Width dth of 1loc04outs and "penings within "ne *nit2 Plus or ;inus /E% inch. >. +ocation and ,imension of 1loc04outs )idden from D Diew iew and *sed for )D )D' 'C and *tilit Penetrations2 Plus or ;inus $E% inch. /#. ,imensions of )aunches2 Plus or ;inus ;inus /E% inch. //. )aunch 1earing Surface ,eviation from Specified Plane2 Plus P lus or ;inus /E< inch. /3 ,ifference in (elative (elative Position of 'djacent )aunch 1earing Surfaces from Specified (elative Position2 Position2 Plus or ;inus /E% inch. /$. 1owing2 Plus or ;inus ;inus +E$9#- ma5imum ma5imum / inch. /%. +ocal Smoothness2 Smoothness2 /E% inch per /# feet. /&. Warping2 Warping2 /E/9 inch per /3 inches of distance from the nearest adjacent corner. /9. Tipping Tipping and 8lushness of Plates2 Plus or ;inus /E% inch. inch. /:. ,imensions of 'rchitectural 8eatur 8eatures es and (ustications2 Plus or ;inus /E< inch.
C. Position Tolerances2 Tolerances2 8or cast4in items measured from from datum line line location- as indicated indicated on Shop ,rawings. /. We Weld ld Plates2 Plus or ;inus / inch. 3. !nserts2 Plus or ;inus /E3 inch. $. )andling ,evices2 Plus or ;inus $ inches. %. (einforcing Steel and Welded Welded Wire Wire (einforcement2 (einforcement2 Plus or ;inus ;inus /E% inch where position has structural structural implications or affects concrete cover? otherwise- Plus or ;inus ;inus /E3 inch. &. (einforcing Steel 5t 5tending ending out of ;em ;ember2 ber2 Plus or ;inus ;inus /E3 inch of plan dimensions. dimensions. 9. Tendons2 Tendons2 Plus or ;inus /E% inch- vertical? vertical? Plus or ;inus / inch- horiBontal. :. +ocation of (ustication =oints2 =oints2 Plus or ;inus /E< /E< inch. <. +ocation of "pening within Panel2 Plus or ;inus /E% /E% inch. >. +ocation of 8lashing (eglets2 (eglets2 Plus or ;inus /E% /E% inch. /#. +ocation of 8lashing (eglets at dge of Panel2 Plus or ;inus /E< inch. //. (eglets for GlaBing Gas0ets2 Plus or ;inus /E< /E< inch. /3. lectrical "utlets- )ose 1ibs2 Plus or ;inus /E3 inch. /$. +ocation of 1earing surface from from nd of ;ember2 Plus or ;inus /E% inch. /%. 'llowable (otation of Plate- Channel !nserts- lectrical 1o5es2 34degree rotation or /E% inch ma5imum over the full dimension of the unit. /&. Position of Sleeve2 Plus or ;inus ;inus /E3 inch. /9. +ocation of Window Window Washer Washer Trac0 or 1uttons2 1uttons2 Plus or ;inus /E< inch. ,elete paragraph below if bric0 bric0 faced architectural units ar aree not used. The number of bric0s allowed these misalignments should be limited to 3 percent of the bric0s on the unit. ,. 1ric048aced 'rchitectural 'rchitectural Precast Concrete *nits. /. 'lignment 'lignment of mortar joints2 3:
3. $. %. &.
a. =og in 'lignment2 /E< inch. b. 'lignment with Panel Centerline2 Plus or ;inus /E< inch. Dariation ariation in Width Width of 5posed ;ortar ;ortar =oints2 Plus or ;inus /E< /E< inch. Tipping of !ndividual 1ric0s 1ric0s from the Panel Plane of 5posed 1ric0 Surface2 Plus /E/9 inch? ;inus /E% inch K depth of form liner joint. 5posed 1ric0 Surface Parallel to Primar Control Surface of Panel2 Plus /E% inch? ;inus /E< inch. !ndividual 1ric0 Step in 8ace ffrom rom Panel Plane of 5posed 1ric0 Sur Surface2 face2 Plus /E/9 inch? ;inus/E% inch K depth of form liner joint.
. Stone Deneer Deneer48aced 48aced 'rchitectural 'rchitectural Precast Concrete *nits. Tolerances below are generall appropriate for smooth4finished stone. (etain- delete- or revise to suit Tolerances Project. /. Dari Dariation ation in Cross4Sectional ,imensions2 8or thic0ness of walls from dimensi dimensions ons indicated2 Plus or ;inus /E% inch. 3. Dari Dariation ation in =oint Width2 Width2 /E< inch in $9 inches or a quarter of nominal joint width- whichever is less.
(evise or delete below for natural4cleft- thermal- and similar finishes. $. Dari Dariation ation in Plane between 'djacent Stone *nits @+i @+ippingA2 ppingA2 /E/9 inch difference between planes of adjacent units. 2. 2.2# 2#
FINI FINISH SHES ES
'. Panel faces shall be free of joint mar0s- grain- and other obvious defects. Corners- including false joints shall be uniform- straight and sharp. 8inish e5posed4face surfaces of architectural precast concrete units to match approved desi'n reference sampleQ sample panelsQ mocFupsQ and as follows2 This 'rticle 'rticle presumes 'rchitect 'rchitect has preapproved one or more design reference samples. !nclude complete description of design reference sample here. !f preapproving manufacturers- coordinate with 6;anufacturers7 'rticle. 'rticle. (evise if multiple samples samples are approved. /. ,esi ,esign gn (ef (efer eren ence ce Sam Sampl ple2 e2 KInsert description and identif. faricator and code numer of sample!) ,elete subparagraph below if not used. PC! published numbered- color photographs of %3< precast concrete finishes- see www.pci.org. www.pci.org. (evise below and add reference number. number. 'dd reference number combinations if more than one finish is required. 3. PC!s PC!s 6'rchitectu 6'rchitectural ral Precast Precast Concrete Concrete Color and Te5t Te5ture ure Selection Selection Guide-7 of plate plate numbers indicated.
3<
(etain tpe of finish from subparagraphs below if needed. !f more than one finish finish is required- add locations to finish descriptions or indicate indicate on ,rawings. 'dd more detailed descriptions of fi finishes nishes outlined below if required when greater definition is required- such as @lightA- @mediumA- or @deepA. (emove matri5 to a ma5imum depth of one4third the average diameter of coarse aggregate ag gregate but not more than one4half the diameter of smallest siBed coarse aggregate. See PC! ;N+ //: //: for more information on finishes. 'n as4cast finish finish generall results in a mottled surface or non4uniform finish. finish. $. 's4Cast 's4Cast Surface Surface 8inish2 8inish2 Provide Provide surfaces surfaces free free of e5cessiv e5cessivee air voidsvoids- sand sand strea0sstrea0s- and and honecombs. %. Te Te5ture 5tured4Surf d4Surface ace 8inish2 8inish2 !mpart !mpart b form liners liners to provide provide surface surfacess free of e5cessi e5cessive ve air voidsvoidssand strea0s- and honecombs- with uniform color and te5ture. &. 1ushhammer 1ushhammer 8inish2 8inish2 *se power power and hand tools tools to remove remove matri5 matri5 and and fracture fracture coarse coarse aggregates aggregates.. 9. 5posed 5posed 'ggregat 'ggregatee 8inish2 8inish2 *se chemical chemical retard retarding ing agents agents applied applied to concret concretee forms forms and washing washing and brushing procedures to e5pose aggregate and surrounding matri5 surfaces after form removal. :. 'brasive41 'brasive41last last 8inish2 8inish2 *se abrasive abrasive gritgrit- equipme equipmentnt- applicati application on techniquestechniques- and and cleaning cleaning procedures to e5pose aggregate and surrounding matri5 surfaces. <. 'cid4tched 'cid4tched 8inish 8inish22 *se acid acid and hot4wate hot4waterr solutionsolution- equipme equipmentnt- applicat application ion techniques techniques-- and cleaning procedures to e5pose aggregate and surrounding matri5 surfaces. Protect hardwareand*se insulation from acid anical attac0.abrasi >. connections )oned 8inish2 8inish2 continuo continuous us mechanical mech abrasion on with with fine gritgrit- followe followed d b filling filling and and rubbing procedures. /#. Polished 8inish2 *se continuous mechanical abrasion with fine grit- followed followed b filling filling and rubbing procedures. //. Sand4mbedment 8inish2 *se selected stones placed in a sand bed in bottom of moldmold- with sand removed after curing. 1. 8ini 8inish sh e5pos e5posed ed 2top 2ottom 2acF surfaces of architectural precast concrete units to match face4 surface finish. (etain paragraph above or below if applicable. (evise below to float finish finish or light4broom finish if smooth- steel4trowel finish is unnecessar. C. 8inish 8inish une5pos une5posed ed surf surface acess 2top 2ottom 2and acF of architectural precast concrete units b smooth steel4trowel finish. (evise finish below to light4broom- stippled- or as4cast finish if float finish is unnecessar- or upgrade to smooth- steel4trowel finish. ,. 8inish 8inish une5posed surfaces surfaces of architectural architectural precast precast concrete concrete units b float finish. 2.21 2.2 1
SOURCE SOURCE QUALIT QUALITY Y CONTRO CONTROL L
'lwas retain paragraph below because it establishes the minimum standard of plant testing and inspecting. PC! ;N+ //: //: mandates source testing requirements and a plant Fualit Sstems ;anual. PC! certification also ensures periodic auditing of plants for compliance with requirements in PC! ;N+ //:. 3>
'. Fualit4Control Testing2 Testing2 Test Test and inspect precast concrete according to to PC! ;N+ ;N+ //: requirements. !f using self4consolidating concrete also test and inspect according to PC! !nterim Guidelines for the *se of Self4Consolidating Concrete. ,elete paragraph and subparagraph below if not required. PC! certification would normall normall be acceptable to authorities having jurisdiction without further monitoring of plant qualit4control and testing program b "wner. 1. "wner will emplo an independent independent testing agenc to verif architectural precast concrete fabricators qualit4control and testing methods. /. 'llow "wners "wners testi testing ng agenc access to material material storage storage areas- concrete concrete production production equipmentequipmentconcrete placement- and curing facilities. facilities. Cooperate with "wners testing agenc and provide samples of materials and concrete mi5es as ma be requested for additional testing and evaluation. C. Strength of precast concrete units will will be considered deficient deficient if unit unitss fail to to compl with 'C! $/< requirements for concrete strength. (eview testing and acceptance criteria with structural engineer. engineer. 'dd criteria for load tests tests if required. ,. Testing2 Testing2 !f there is evidence that the concrete strength of precast concrete units ma be deficient deficient or ma not compl with 'C! $/< requirements- Precaster will emplo an independent testing agenc to obtain- prepare- and test cores drilled from hardened hardene d concrete to determine compressive strength according to 'ST; C %3. /. ' minimu minimum m of three represent representative ative cores cores will be ta0en ta0en from units units of suspect suspect strengthstrength- from locations directed b b 'rchitect. 3. Cores Cores will will be teste tested d in an air4dr air4dr conditi condition. on. PC!s recommendations below are more stringent than 'C!s. 'C!s. $. Strength Strength of concrete concrete for each series series of $ cores will will be considered considered satisfac satisfactor tor if the the average compressive strength is equal to at least <& percent of the 3<4da design compressive strength and no single core is less than :& percent of the 3<4da design compressive strength. %. Te Test st results results will will be made in writing writing on the same da that that tests are are performedperformed- with copies copies to 'rchitect- Contractor- and precast concrete fabricator. Test Test reports will include the following2 a. Projec Projectt ident identifi ificat cation ion name name and and numbe number. r. b. ,ate when tests were performed. c. Name Name of prec precast ast concret concretee fabri fabricat cator or.. d. Name Name of concre concrete te test testing ing agenc agenc.. e. !dentifica !dentification tion letterletter- name- and tpe tpe of precast concrete concrete units units or units units represented represented b core tests? design compressive strength? tpe of brea0? compressive strength at brea0s- corrected for length4diameter ratio? and direction of applied load to core in relation to horiBontal plane of concrete as placed.
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. Patching2 Patching2 !f core test test results results are satisfac satisfactor tor and precast precast concrete concrete units compl compl with with requirement requirementssclean and dampen core holes and solidl fill with precast concrete mi5 that has no coarse aggregateand finish to match adjacent precast concrete surfaces. 8. ,efective W Wor02 or02 'rchitectural precast concrete units that do not com compl pl with acceptabilit requirements in PC! ;N+ //:- including concrete strength- manufacturing tolerances- and color and te5ture range are unacceptable. Chipped- spalled or crac0ed units ma be repaired- if repaired units match the visual moc04up. The 'rchitect 'rchitect reserves the right to reject an unit if it does not match match the accepted samples and visual moc04up. (eplace unacceptable units with precast concrete units that compl with requirements. PA"T 3 $ EEC?TION
The General Contractor must provide suitable access to the building for hauling and erection equipment to operate under their own power. power. Suitable access includes firmfirm- level roadwas and properl designed crane pads with proper drainage and maintenance. "bstructing wires must be shiel shielded ded or removed.
3.1 PREPARA PREPARATIO TION N
'. ,eliver ,eliver anchorage anchorage devices that are embedded embedded in or attached attached to the building structura structurall frame or foundation before start of such wor0. Provide locations- setting diagramsdiagrams- and templates for tthe he proper installation of each anchorage device.
3.2 E%AMINAT E%AMINATION ION
'. 5amine 5amine supporting supporting structural structural frame or foundation foundation and conditio conditions ns for compliance compliance with requirements for installation tolerances- true and level bearing surfaces- and other o ther conditions affecting performance. Proceed with installation installation onl after unsatisfactor condit conditions ions have been corrected. 1. ,o not install precast precast concret concretee units until supporting supporting cast4in cast4in place concrete concrete building structural structural framing has attained minimum allowable design compressive strength or supporting steel or other o ther structure is structurall read to receive loads from precast. 3.3 ERECTI ERECTION ON
'. !nstall loose clips- hangers- bearing pads and other accessories required for connecting architectural precast concrete units to supporting members and bac0up materials. 1. rect architectur architectural al precast concrete concrete level- plumb plumb and square within within the specified specified allowable allowable tolerances. Provide temporar supports and bracing as required to mai maintain ntain position- stabilitstabilit- and alignment of units until permanent connections are completed. co mpleted.
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/. !nstall !nstall temporar temporar steel steel or plastic plastic spacing spacing shims or bearing bearing pads as precast precast concrete concrete units units are being erected. Tac0 Tac0 weld steel shims to each other to prevent shims from separ separating. ating. 3. ;aintain ;aintain horiBontal horiBontal and vertical vertical joint joint alignment alignment and uniform uniform joint width width as erection erection progresse progresses. s. $. (emove projecti projecting ng lifting lifting devices and use use sand4cement sand4cement grout grout to fill voids voids within within recessed recessed lifting devices flush with surface of adjacent precast concrete surfaces when recess is e5posed. %. *nless *nless otherwise otherwise shown shown provide provide for for uniform uniform joint joint widths widths of $E% inch inch C. Connect architec architectural tural precast precast concrete concrete units in position position b boltingbolting- weldingwelding- groutinggrouting- or as otherwise indicated on approved rection ,rawings. (emove temporar shimsshims- wedges- and spacers as soon as practical after connecting andEor grouting are completed. /. ,isruption of roof fflashing lashing continuit b connections is not permitted? concealment withi within n roof insulation is acceptable. ,. Welding2 Welding2 Compl with applicable 'WS ,/./ and 'WS 'WS ,/.% requirements for welding- welding electrodes- appearance- qualit of welds- and methods used in correcting welding wor0. /. Protect Protect architectura architecturall precast concrete concrete units units and bearing bearing pads from damage damage b field welding welding or cutting operations and provide noncombustible shields as required. 3. Welds We lds notb specified speci fied shall shall be continuous continuous fillet weldswelds- using not less less than the minimum minimum fillet as specified 'WS. $. Clean weld weld affected affected metal surface surfacess with chipping chipping hammer hammer followed followed b brushing brushing then appl a minimum #.##% inch thic0 coat of galvaniBed repair paint to galvaniBed surfaces in conformance with 'ST; ':<#. (etain subparagraph above or below. %. Clean weld weld affected affected metal surface surfacess with chipping chipping hammer hammer followed followed b brushing brushing then reprime reprime damaged painted surfaces in accordance with manufacturers recommendations. &. Di Disuall suall inspect inspect all welds welds critical critical to precast precast connecti connections. ons. Di Disuall suall chec0 all welds welds for for completion and remove- reweld or repair all defective welds- if services of o f 'WS4certi 'WS4certified fied welding inspector are not furnished b "wner. . 't bolted bolted connectionsconnections- use loc0 washers washers-- tac0 weldingwelding- or other acceptabl acceptablee means to prevent prevent loosening of nuts after final adjustment. /. Where slotte slotted d connections connections are usedused- verif verif bolt bolt position position and tightnes tightness. s. 8or sliding sliding connection connectionss properl secure bolt but allow bolt to move within connection slot. 8or friction connection appl specified bolt torque and chec0 3& percent of bolts at random b calibrated torque wrench. (evise locations and e5tent of grouting in paragraph below if required. 8. Grouting Grouting Connection Connections2 s2 Grout connections connections where where requir required ed or indicat indicated. ed. (etain (etain grout in place place until until hard enough to support itself. itself. Pac0 spaces with stiff stiff grout materialmaterial- tamping until voids are completel filled. Place grout to finish smooth- level- and plumb with adjacent concret concretee surfaces. Promptl remove grout material from e5posed surfaces before it affects finishes or hardens. $3
3.4 ERECTION ERECTION TOLERANCE TOLERANCES S
'. rect architectural precast concrete units levellevel- plumb- square- true- and in in alignment without e5ceeding the noncumulative erection tolerances of PC! ;N+ //:- 'ppendi5 !. Select paragraph above or paragraph and subparagraphs below. below. *suall retain above unless tolerances for Project deviate from PC! recommendations. PC! ;N+ //: //: erection tolerances are listed below. !f more e5acting tolerances are required for Project- coordinate with fabricati fabrication on tolerances for precast concrete as well as erection tolerances for supporting supp orting construction. 1. rect architect architectural ural precast precast concrete units units levellevel- plumb- squaresquare- and true- without without e5ceeding the following noncumulative erection tolerances. /. Plan +ocation +ocation from from 1uilding 1uilding Grid Grid ,atum2 ,atum2 Plus or ;inus /E3 inch. 3. Plan +ocation +ocation from from Centerline Centerline of Steel2 Steel2 Plus or ;inus ;inus /E3 inch. $. Top Top levatio levation n from Nominal Nominal Top Top levation2 levation2 's follows2 follows2 a. 5pose 5posed d !ndiv !ndividu idual al Panel Panel22 Plus Plus or ;inus ;inus /E% /E% inch. inch. b. None5posed !ndividual Panel2 Plus or ;inus /E3 inch. c. None5posed 5pose 5posed d sed Panel (elat (elative tove'dja 'to djacent cent Panel Panel2 2 /E% inch. inc d. None5po Panel Panel (elati (ive elative 'djacent 'dj acent Panel2 /E3h.inch. inch. %. Support levation levation from Nominal Nominal Support Support levation2 levation2 's follows2 follows2 a. ;a5i ;a5imu mum m +ow2 +ow2 /E3 /E3 inch inch.. &. ;a5i ;a5imu mum m )i )igh2 gh2 /E% /E% inch. inch. &. ;a5imum ;a5imum Plumb Da Dariation riation over the +esser +esser of )eight )eight of Structure Structure or /## 8eet2 8eet2 / inch. 9. Plumb in 'n /# 8eet of lement lement )eight2 )eight2 /E% inch. :. ;a5imum ;a5imum =og =og in 'l 'lignmen ignmentt of ;atching ;atching dges2 dges2 /E% inch. <. =oint width @Governs @Governs over over =oint =oint Ta TaperA2 perA2 Plus or ;inus ;inus /E% /E% inch. inch. >. ;a5im ;a5imum um =oint =oint Taper2 aper2 $E< inch. inch. /#. =oint Taper Taper in in /# 8eet2 /E% inch. //. ;a5imum =og in 'lignment of ;atching ;atching 8aces2 /E% inch. /3. ,ifferential 1owing or CamberCamber- as rected- between 'd 'djacent jacent ;embers of Same ,esign2 /E% inch. /$. "pening )eight between Spandrels2 Plus or ;inus ;inus /E% inch. 3.5 FIELD QUALITY QUALITY CONTROL CONTROL
(etain this 'rticle 'rticle if field testing and inspecting inspecting are required. (evise paragraph below if Contractor engages agenc. '. Testing2 Testing2 "wner will engage a qualified independent testing and inspecting agenc to perform field field tests and inspections. 1. 8ield welds welds will be subject subject to visual inspection inspectionss and non4destructi non4destructive ve testing testing in accordance with 'ST; /9& or 'ST; :#>. $$
C. Testing Testing agenc will report test results promptl and in writing writing to Contractor and 'rchitect. 'rchitect. ,. (epair or remove remove and replace wor0 that does does not compl with specifi specified ed requirements. requirements. . 'dditional 'dditional testing testing and inspectinginspecting- at Contractor Contractorss e5pensee5pense- will be performed performed to determine determine compliance of corrected wor0 with specified requirements. 3.6 REPA REPAIRS
1lemishes occurring after deliver are normall repaired before final joint sealing and cleaning as weather permits. '. (epairs (epairs will be permitted permitted provided structural structural adequac adequac of units and appearance are not impaired. impaired.
The precast concrete manufacturer should develop appropriate repair mi5tures and techniques during the production sample approval process. 1. ;i5 patching patching materials materials and repair units units so cured patches patches blend with colo colorr- te5turete5ture- and uniformit uniformit of adjacent e5posed surfaces and show no apparent line of demarcation between original and repaired wor0- when viewed in tpical dalight illumination from a distance of 3# feet. C. Prepare Prepare and repair damaged damaged galvaniBed galvaniBed coatings with with galvaniBing galvaniBing repair paint paint according according to 'ST; ':<#.
(etain paragraph above if using galvaniBed anchors- connections- and other items? retain first paragraph below if items are prime painted. ,. Wire Wire brush- clean- and paint damaged prime4painted components with same tpe of shop primer. . (emove and replace damaged architectural precast concret concretee units when repairs do not meet meet requirements. 3.7 CLEANI CLEANING NG
Specif whether erector or precaster does cleaning under the responsibilit of General Contractor. '. Clean all surfaces of precast concrete to be e5posed to view- as necessarnecessar- prior to shipping. 1. Clean mortarmortar- plasterplaster- fireproofing- weld slag- and an other deleterious material from from concrete surfaces and adjacent materials immediatel. immediatel. C. Clean e5posed e5posed surfaces surfaces of precast concrete concrete unit unitss after erection erection and completion completion of joint treatment treatment to remove weld mar0s- other mar0ings- dirt- and stains. /. Perform Perform cleaning cleaning proceduresprocedures- if necessar necessar-- according according to precast concrete concrete fabricator fabricatorss recommendations. Clean soiled precast concrete surfaces with detergent and waterwater- using stiff
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fiber brushes and sponges- and rinse with clean water. Protect other wor0 from staining or damage due to cleaning operations. 3. ,o not use cleani cleaning ng materials materials or processe processess that could could change the the appearance appearance of e5posed e5posed concrete finishes or damage adjacent materials.
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