Specs
Content
TECHNICAL
SPECIFICATIONS
Project: Proposed Three Storey Residence with Roofdeck Location: Lot 15 Blk.5 Sugartowne Housing Batasan Hills Q.C. Owner: Ms. Emelie Belisario-Abis
Prepared by:
Rommel B. Almodal Civil Engineer PRC no.: 99717 TIN: 215 – 932 – 412 PTR: 4633250
Place Issued: 1-11-11 Date Issued: Q.C.
STRUCTURAL TECHNICAL SPECIFICATIONS 1.00 1.01 SITE PREPARATION AND EXCAVATION SCOPE OF WORKS
a. The contractor shall furnish all labor, materials, equipment plant and other facilities and perform all works necessary to complete the preparation of site, excavation, filling and grading in strict compliance with the applicable drawings and as specified herein. All works under this section shall be subject to the General Conditions accompanying these technical specifications. The Contractor and all his sub-contractors for this purpose is required to refer specially thereto.
b.
1.02
STAKE AND BATTER BOARDS/SURVEY
a. The contractor shall stake out the lines for the project accurately and establish grades, after which the approval of the Architect and the structural engineer or their representative shall be secured before any further work is commenced. A qualified licensed surveyor must be hired by the Contractor to ensure precise placement and alignment of all the project components due to critic configuration of the plan and site condition. Basic batter brands and basic reference works shall be expected at the expense of the contractor, at some places, where they will not be disturbed during construction or as directed by the structural engineer, the Architect or their representative. Materials shall be stored and works shall be conducted in such a manner as to preserve all reference works set. Re-establishment of reference works where necessitated due to negligence on the part of the contractor shall be done at the expense of the contractor. The contractor shall establish two (2) permanent bench marks from previously known elevations near or within the site of the construction for the purpose of determining any settlement that may occur during the progress of the construction. Elevation reading shall be taken on at least four (4) points on the project structure. A permanent record of the weekly readings shall be kept at the construction site and monthly report thereof shall be submitted to the Architect and the structural engineer unless some unusual reading is observed in which case report shall be made immediately. The contractor shall provide all necessary survey instruments.
b.
c.
d.
e.
f.
g.
1.03
GENERAL EXCAVATIONS
a. The contractor shall make all necessary excavations for the foundations of the project structures to grade as indicated on the drawings. All trenches shall be excavated at a neat size, leveled to a line at the bottom ready to receive the foundation. The contractor shall exercise extra care not to carry the excavation to a depth below elevations shown on the drawings. Work that is excavated to a greater depth than required by the drawings and specifications and which is within the bearing area of the foundation and of floor slabs shall be filled lean compressive strength equal to 17 MPa at the expense of the contractor. No foundation shall rest on fill. Where excavations for foundations reveal that footings will rest on fill, excavations shall be carried further until the desired stratum is reached for safe bearing. All excavations shall be made with allowance allotted for floor slabs
b.
and forms. Bottom of foundations shall be level, clean, and clear of loose materials with the lower section true to size. c. Foundations as indicated on the drawings are designed for a soil bearing pressure of 144 KPa. If however, this bearing pressure is not attained at elevations shown on the drawings, the structural engineer may order any of the following steps taken on their combinations: 1. 2. 3. Boring log or soil bearing test. Excavations for the foundations to be carried out deeper until the soil bearing capacity is obtained. Alteration of the sizes of the foundations to suit the bearing capacity found at the site.
The contractor shall be paid for extra excavations and extra concrete in place, in accordance with the unit prices set forth in this contract. When the nature of the soil is such that good bearing is found to exist at higher elevations than those shown on the drawings, the structural engineer and the Architect may decide to stop excavations at these higher elevations. In case solid rock is encountered, foundations shall be embedded two (2) feet into the rock. Deductions shall be made on the contract price in accordance with the unit prices set forth in this contract. d. All excavations for drainage, sewer and water service and other underground utilities are included in this section.
1.04
UTILITIES
a. When encountered in the work or as indicated protect existing sewer, water, gas, electric, and other utility services, structures, where required for proper execution of the work, relocate them as directed. If the existing active services are not indicated but are encountered, requiring protection or relocation, request in writing for the decision of the owner, his architect or the structural engineer. The contractor shall not proceed until written instructions are obtained from the Owner or his architect, structural engineer or their daily authorized representative.
1.05
BORING AND SOIL BEARING TEST
a. Should it be found necessary to conduct borings and soil bearing test, such work may be ordered by the owner or the structural engineer and performed by the contractor at no extra cost.
2.00 2.01
BACKFILLING, FILLING AND GRADING SCOPE OF WORK
a. Furnish all labor, materials, equipment, plant and other facilities and perform all operations necessary to complete backfilling, filling and grading works shown and herein specified. All work under this section shall be subject to the General Conditions accompanying these specifications. The general contractor and all his sub-contractors for this portion of the work required to refer specially, thereto.
b.
2.02
FILLS AND BACKFILLS
a. Compact and level fill materials other than sub-grade porous fill to a tolerable acceptance to the structural engineer.
b.
Fill materials: Mass fill shall mean selected earth or sand, free from organic materials, trash, or debris and containing no rocks, bricks, broken concrete or similar solid materials. Larger than 150 mm in largest dimension. Submit fill materials samples for approval to the structural engineer before filling. 1. Sub-grade porous fill for use under side walks and floor slabs shall be grades bank gravel with sand. If porous fill, material exist on site, this material will be used first. No selected fill shall be used where area to be filled is more than 500 mm deep, where sand shall be used.
c.
Placing, Compacting and Testing 1. Place mass fill in layers not exceeding 20 cm. when placed by machine earth spreading and compacting equipments. When placed by hand, compact in layers not exceeding 10 cm thickness. Use of hand placement is mandatory where use of heavy spreading and compacting mechanized equipment is impractical, or could possibly damage work in place. Place mass fill to an elevation not closer than 25 cm. below top of finished floor slabs’ elevation and to elevation of underside of pavements. Compact each layer to density of not less than 95% of maximum dry density at optimum moisture content as determined by test conforming to the requirements of ASTM D1557. Where test indicate a higher than optimum moisture content, allow fill to dry and repeat testing and compaction to meet specification requirements before placing additional fill.
2. 3.
4.
2.03
GRADING
a. b. Accomplish rough grading for areas indicated, for open courts, driveways, walkways, etc. Grade by hand, machine or both to achieve rough grades called for by the working drawings. Remove rocks, rubbles, and other non-earth composition materials larger than 75 mm in greatest dimension.
3.00 3.01
CONCRETE AND REINFORCED CONCRETE WORKS SCOPE OF WORK
a. The work covered by this section shall include all labor, materials, equipment, plant, and other facilities for the satisfactory performance of all work necessary to complete all concrete and reinforced concrete work shown on the drawings and as specified herein. All work under this section shall be subject to the General Conditions accompanying these specifications. The General Contractor of the work is required to refer specially, thereto. The intent of these specifications is to cover the complete concrete work for the project and any work called for in these specifications not shown on the drawings or vice-versa, shall be furnished the same as if it were shown on the drawings and called for in these specifications. Also any material which has been committed form both the drawings and specifications but is evidently necessary to complete the project shall be furnished the same as if it were shown on the drawings and called for in these specifications. All concrete and reinforced concrete work shall be done in accordance with the “STANDARD SPECIFICATIONS FOR HIGHWAYS AND BRIDGES” revised and as adopted by the Department of Public Works and Highways and the current American Concrete Institute’s “BUILDING CODE RECQUIREMENTS FOR REINFORCED CONCRETE STRUCTURES” (ACI 318-08). In case of conflict, the later (ACI) shall prevail except as revised in these specifications.
b.
c.
d.
3.02.1
CONCRETE MATERIALS
a. b. c. d. Cement shall conform to all requirements of ASTM C150 (STANDARD SPECIFIACTIONS FOR PORTLAND CEMENT). All cement shall be Portland Cement type. The contractor shall provide suitable means for storing and protecting the cement from dampness. Bags of cement which for any reason have become partially set or which contain lumps of caked cement shall be rejected. The use of cement salvaged from discarded or used bags will not be permitted.
3.02.2
FINE AGGREGATES
a. Fine aggregates used in the composition of concrete, mortar, grout, or plaster shall consist of sand, stone screenings or other approved inert materials with similar characteristics or a combination thereof having clean, hard, strong, durable, sound, uncoated grains free from injurious amount of dust, lumps, soft or laky particles, shale, alkali, organic matter, loam or other deleterious substances and shall contain not more than 3% of materials passing the No. 200 sieve by washing. Fine aggregates shall be free from any substance which will tend to discolor the concrete surface. Fine aggregates shall be graded to conform to the requirements of AASHTO T-27 and or ASTM D33 as tabulated hereunder.
b. c.
------------------------------------------------------------------------------------------------------------Sieve size Percent Passing by weight ------------------------------------------------------------------------------------------------------------3/B” 100% No. 4 90 100% No. 16 45 80% No. 50 5 30% No.100 0 10% ------------------------------------------------------------------------------------------------------------d. The fine aggregates should have a clay lumps and friable particles content of not more than 3% by weight. The specific gravity of which shall not be less than 2.5 nor more than 2.8. The sulphate content of the fine aggregates should not exceed 0.40% by weight as SO chlorides in the fine aggregates shall not exceed 0.10% by weight as chlorine ions. Soundness loss in the sodium sulphate solution per ASTM C 88. Shall not exceed to 10% by weight nor 18% when subjected to magnesium sulphate solution. Absorption per ASTM C 128 shall not exceed 3.0%.
e. f. g.
3.02.3
COARSE AGGREGATE
a. Coarse aggregate shall consist of stone, gravel or other approved inert materials with similar characteristics having clean, hard, sound, strong, durable uncoated particles, free from injurious amount of soft friable, end elongated on laminated pieces, alkali, organic or other deleterious matter. Coarse aggregate shall contain no more than 1.50% of material passing the No. 200 sieve by washing and shall conform to any of the grading requirements as hereunder tabulated.
b.
------------------------------------------------------------------------------------------------------------Sieve Percent Passing by Weight ------------------------------------------------------------------------------------------------------------A B 2 1/2” 100% 100% 2 “ 95 100% 95 100% 1 “ 33 70% 3/4” 35 70% 1/2” 10 30% 3/8” 10 30% No. 4 0 5% 0 5% ------------------------------------------------------------------------------------------------------------c. The coarse aggregate shall have an abrasion loss of not greater than 45% at 500 revolutions when tested in accordance with AASHTO T-96 (LOS ANGELES ABRASION TEST). The coarse aggregate shall be handled by the Contractor in such manner as to prevent segregation. Washing and screening may be carried out by the Contractor in order to conform to the requirements of the Contractor. Requirements for soundness, sulphates and chlorides, clay lumps and friable particles, absorption and specific gravity shall be as specified in the fine aggregates (section 2 above).
d.
e.
3.02.4
WATER
a. The water to be used for the project or for the concrete work shall be potable water. It should available throughout the work and insufficiency could be a cause for halting concreting. Available water shall be allocated as top priority for concrete curing. The water shall be clean, free from injurious amount of oil, acids, salts, alkaline organic matter or any deleterious substances. Total dissolved solids shall not exceed 2000 ppm and sulphate contents shall not be more than 1000 ppm. The potential hydrogen minima shall be 7.00.
3.02.5
REINFORCING STEEL
a. All reinforcing steel bars shall be deformed and shall be new and free from rust, oil, defects, grease, or links. They shall conform to the requirements of ASTM A615 (SI) (STANDARD) SPECIFICATIONS FOR DEFORMED AND PLAIN BILLET STEEL BARS FOR CONCRETE REINFORCEMENTS INCLUDING SUPPLEMENTARY REQUIREMENTS). 1. 2. 3. b. Reinforcements with diameter less or equal to 10 mm shall have a minimum strength of 230 MPa. Reinforcement with diameter greater than 12 mm or equal to 25 mm shall have a minimum yield strength of 275 MPa. Reinforcements of diameter greater than 25 mm shall have a minimum yield strength of fy = 414 MPa.
Steel bars shall be sampled per requirements of ASTM A -370; but in no case lesser than the following schedule. One (1) set of any samples for every twenty (20) tons of bar per size per delivery or a fraction thereof. Where a delivery involves bars casted of different lots; said bars per lot shall be sampled separately.
3.03
STORAGE OF MATERIALS
a. Cement shall be stored immediately upon arrival at the site in substantial, weather-proof bodegas with floor raised from the ground sufficiently high to be free from moisture or dampness.
b. c.
Aggregates shall be stored in such a manner as avoid the intrusion of foreign materials. Reinforcing bars shall be placed in racks raised above the ground and protected from moisture and vegetation. Steel has to be stored under cover or otherwise prevented from rusting. Any material which has deteriorated or which has been damaged shall not be used for concrete.
d.
3.04
TESTING OF MATERIALS
a. The owner or the structural engineer shall have the right to order the test of any material supplied by the Contractor entering into concrete and reinforced concrete whenever there is reasonable doubt as to its suitability for the purpose. For concrete test such test shall conform to the requirements of ASTM C39 (STANDARD METHOD OF TEST FOR COMPRESSIVE STRENGTH OF MOLDED CONCRETE CYLINDERS). For steel such test shall conform to the requirements of ASTM A370 (STANDARD METHODS AND DEFINITIONS FOR MECHANICAL TESTING OF STEEL PRODUCTS). All samples shall be prepared delivered and fetched by the contractor and all cost of test shall be at the expense of the Contractor. Copies of test results shall be furnished to the structural engineer promptly by the contractor.
3.05
STRENGTH OF CONCRETE
a. All concrete without exception shall develop a minimum of 28-day compressive cylinder strength as specified hereunder: 1. 2. 3. 4. b. Foundations……………………………………21 MPa Slab on fill………………………………………21 MPa Beams, girders, column, suspended slabs, others…………………………………………...21 MPa Retaining walls………………………………..21 MPa
Contractor shall submit mix design obtained from at least three standard cylinder samples made in accordance with the “RECOMMENDED PRACTICE FOR SELECTING PROPORTIONS FOR CONCRETE” (ACI 613) for the strength required stating the proposed slump and the proportional weights of cement, aggregates, and water. The mixes shall be approved by preliminary test fourteen days before concreting and shall show the required strength. No substitutions shall be made in the materials or mix without additional test to show the quality for the concrete is satisfactory.
3.06
CONCRETE PROPORTION AND CONSISTENCY
a. The proportions of aggregates to cement for any concrete shall be such as to produce a mixture which will work readily into the corners and angles of the forms and around reinforcements with the method of placing employed in the work, but without permitting the materials to segregate, or excess free water to collect on the surface. The weight of the fine aggregates separated by the No. 4 standard sieve, shall not be less than thirty percent (30%) nor greater than fifty total. The methods of measuring and proportioning concrete materials shall be those that can be accurately controlled and easily checked at any time during the world. Measurement of materials for ready mixed concrete shall conform to the requirements of ASTM C94 (STANDARD SPECIFICATIONS FOR READY-MIXED CONCRETE).
b.
3.07
MIXING CONCRETE
a. No hand mixing shall be allowed except in case of emergency such as mixer breakdown during pouring operations, and shall stop at the first allowed construction joint. All concrete shall be machine mixed for at least 1 ½ minutes after all the materials including water, are in the mixing drum.
b.
The mixer shall be approved size, and type which-will insert a uniform disthrough out the mass. It shall be equipped with a device for accurately measuring and controlling the amount of mixing water in each batch. The first batch of concrete materials placed in the mixer shall contain sufficient excess cement, sand and water to coat the inside of the drum without reducing the content of the mix to be discharged. Retamping of concrete shall not be permitted. Ready-mixed concrete may be used in accordance with the requirements of ASTM C94 (“SPECIFICATIONS FOR READY-MIXED CONCRETE”).
c.
d. e.
3.08
FORMS
a. The contractor shall provide forms that will produce correctly aligned concrete. Plastering in general, shall not be so allowed so that extra care shall be exercised by the contractor in choice of fitting and rigid supporting of the forms. Plywood, metal or surfaced lumber form shall be used for all exposed concrete work. Column forms shall be checked for plumbness before concrete is poured. Hand holes shall be provided in column forms at the lowest points of pour lifts to render this space accessible for cleaning. All girders, beams, centering shall be crowned at least 2.50 cm. in all directions for every seven and a half (7.50) meters of span. However, cambers for all cantilevers shall be as indicated in plans or obtained from the structural engineer.
b.
c.
3.09
PLACING REINFORCEMENTS
a. All reinforcements shall be placed accurately in accordance with the plans furnished by the structural engineer. In case of any doubt or ambiguity in placing the steel, the contractor shall consult with the structural engineer whose decision shall be final in such case. All loose rust, or scale, all adhering materials, and all oil or other materials which tend to destroy bond between the concrete and the reinforcements shall be removed before placing the steel and before pouring begins. Metal reinforcement shall be accurately placed and adequately secured by concrete or metal chair spacers. The clear distance between parallel bars shall be at least 1 1/2 times the diameter of the bar. In no case shall the clear distance between bars except in columns and between multiple layers of bars in beams be less than 2.50 cm. nor, less than 1 1/3 times the maximum size of the coarse aggregates. Where bars are used in two or more layers, the bars in the upper layers shall be placed at a clear distance of not less than 25 mm.
b.
c.
3.10
OFFSETS AND SPLICES IN REINFORCEMENTS
a. In slabs, beams and girders, splices for the reinforcements at points of maximum stresses shall be avoided and may be allowed only if welded or upon the written approval of splice details by the structural engineer. Splices shall be 60 bar diameters for plain bars and 40 bar diameters for deformed bars, or by welding to develop at least 125% of the specified yield strength of the bar. Splices in adjacent bars shall generally be staggered. Dowel bars of at least the same size and number as the main reinforcements shall be placed on all construction joints between foundations and walls, columns, or masonry partitions. Embedment and splice shall each be 40 bar diameters, but the splice may be welded as indicated.
b.
3.11
CURING CONCRETE
a.
Curing shall be done by keeping concrete continuously moist for at least one week after placing. Floors and vertical surfaces may be sprayed with an approved preparation to retard evaporation of water provided such spraying is not objectionable because of subsequent finish. Curing shall begin as soon as concrete has attained initial set. Calcium chloride shall not be allowed in any concrete mix, unless approved in writing by the structural engineer.
b.
4.00 4.01
CEMENT AND MASONRY WORK SCOPE OF WORK
a. The work under this section shall include all labor, materials, equipment, plant and other facilities and the satisfactory performance of all work necessary to complete all cement and masonry work shown on the working drawings and as specified herein. Unless otherwise indicated on the working drawings or specified herein, all materials or work under this section shall be subject to the provisions under 3.00 CONCRETE AND REINFORCED CONCRETE. All work under this section shall be subject to the General Conditions accompanying these technical specifications. The contractor and his sub-contractors are required to refer thereto.
b.
c.
4.02
MORTAR
a. b. c. d. Cement mortar shall be one part Portland cement two parts and by volume but not more than one Portland cement and three parts sand by volume. Mortar materials shall be thoroughly mixed in proportions specified to uniform color and consistency with satisfactory workability. Mortar which shows a tendency to become prematurely dry before, setting time shall have water added to it and shall be remixed. Re-tampering is not permitted. No mortar which has stood for more than one (1) hour shall be used. Work shall not be permitted on mortar that has reached its initial set.
PLUMBING SPECIFICATIONS 1.01 BASIC MATERIALS AND METHOD
a. All materials to be used shall conform with the standards below. Use of materials shall further be governed by other requirements imposed and shall be subject to test necessary to ascertain their fitness if the Owner so requires: 1. 2.0 3.0 PVC Pipes and fittings Galvanized iron for outside waterline Stainless steel for waterline inside the building Class 150 by Moldex or Emerald or approved equal Schedule 40 Schedule 40
4.0 5.0 6.0 7.0 8.0 9.0 10. 11.0 12.0 13.0 b.
Hot Waterlines Water Heater Floor Drain Roof drain on G.I. gutter Bronze Gate Valve Check Valve Water Meter Pump Pressure Tank Polypropylene pipes & fittings
Copper, Type L, hard drawn National DH-112 ASA Metals ASA 40-9 size 50mm Stainless Steel wire basket Strainer class 125 by Kitz or Toyo class 125# by Kitz or Toyo Arads or Asahi Goulds or approved equal Stainless steel, gage 12 Ecosan, Vesbo or Fusiotherm
Alternate Materials: Use of any material, not specified in these specifications may be allowed provide such alternate has been approved by the Owner and provided further that the test, it required, shall be done by an approved agency in accordance with the generally accepted standards. Identification of Materials: Each length of pipe, fitting, trap, fixture or device used in the plumbing system shall have cast or stamped or device used in the plumbing system shall have cast or stamped or indelibly marked on it. The manufacturer’s trademark or name, the weight, type and class of product when required by the standards mentioned above.
c.
2.0
PLUMBING a. GENERAL
1. 2. Applicable provision of “general conditions” govern work under this section. The Contractor shall provide all times, articles, materials, operations or methods listed, mentioned, or scheduled on the drawings and/or specified, including all labor, materials, equipment and incidentals for their completion. All fittings, connections, piping, hidden or embedded in concrete shall be subject to inspection by the Owner or his representative before covering. The drawings and Specifications are complementary to each other and any labor or materials called by either, whether or not called of by both, if necessary for the successful operation of any of the particular type of equipment shall b furnished and installed without additional cost to there Owner. Intent – it isn’t intended that the Drawings shall show every pipe, fittings, valve, and appliance. All such items whether specifically mentioned or not, nor indicated on the drawings shall be furnished and installed if necessary to complete the system in accordance with the best practice of the plumbing trade and to the satisfaction of the Owner.
3. 4.
5.
b.
WORK INCLUDED
1. Work included under this Section of the Specification consist in furnishing all labor, tools, equipment, appliances, and materials necessary for complete installation, testing and operation of the water distribution system in accordance with Specification and all applicable drawings in the contract. a. b. c. d. Water distribution piping system Sanitary drainage piping system Storm drainage piping system Payment for all permits necessary to the completion of the work ready for service.
3.0
COLD WATER SYSTEM
All waterlines outside the building shall be U-PVC Blue (modex). All waterlines inside the building shall be uPVC blue (moldex). All hot waterlines shall be copper, type L, hard drawn or polypropylene by Vesbo. All waterlines shall be tested at 100 psi for two hours before covering. All waterlines shall be disinfected.
4.0
SANITARY DARINAGE SYSTEM
All sanitary waste and vent pipes and fittings shall be PVC series 1000. All sanitary drainage pipes shall slope at one percent.
5.0
STORM DRAINAGE SYSTEM
All downspouts shall be PVC, series 1000. All storm drainage piping system shall slope at one-half percent.
TECHNICAL SPECIFICATIONS for ELECTRICAL WORKS
1. 2.
All electrical works shall conform strictly to the latest edition of the Philippine Electrical Code, and the rules and regulations of Quezon City. The work to be done shall include the furnishing of all labor and materials and tools required to construct and complete the electrical system as shown on drawings as follows: a. b. c. d. e. Lighting and power system Telephone system Cable Television System Intercom System Power and Telephone service entrance
3. 4.
Conduits: Use intermediate metallic conduit (IMC) for all service entrance work equal to Matsushita or Allied Use C for all concealed and embedded work equal to Emerald or Neltex. Wires and Cables: All wires shall be copper, soft drawn and annealed, standard gage size as indicated. Wires and cables shall be Phelps Dodge, American Wire and Cable or approved equivalent. All exposed conduit work above ceiling shall be properly and securely fastened with malleable clamps with tox and screw at intervals of every 1.5 meters. Switches: Flush, quiet type, 15-ampere rating, bakelite cover. National, Gewiss, or approved equivalent. Color and finish to be approved by the Architect. Receptacles: Standard 15-ampere rating, 250 V, duplex grounding type for flush mounting. National, Gewiss, or approved equivalent. Color and finish to be approved by the Architect. Lighting Fixtures: Shall be furnished and installed by the Electrical Contractor as shown in the plans. Ballasts shall be rapid start, high power factor equal to G.E. Fluorescent lamp shall be daylight type. Grounding: All metallic conduits, supports, cabinets and equipment shall be properly grounded. Guarantee: The completed installation shall be guaranteed to be free from defective materials and workmanship for a period of 12 months from the date of acceptance. Any defect which may appear for the aforesaid period shall be remedied at the expense of the Electrical Contractor.
5. 6. 7. 8.
9. 10.
- END -
SPECIFICATIONS
Project: Proposed Three Storey Residence with Roofdeck Location: Lot 15 Blk.5 Sugartowne Housing Batasan Hills Q.C. Owner: Ms. Emelie Belisario-Abis
Prepared by:
Rommel B. Almodal Civil Engineer PRC no.: 99717 TIN: 215 – 932 – 412 PTR: 4633250
Place Issued: 1-11-11 Date Issued: Q.C.
STRUCTURAL TECHNICAL SPECIFICATIONS 1.00 1.01 SITE PREPARATION AND EXCAVATION SCOPE OF WORKS
a. The contractor shall furnish all labor, materials, equipment plant and other facilities and perform all works necessary to complete the preparation of site, excavation, filling and grading in strict compliance with the applicable drawings and as specified herein. All works under this section shall be subject to the General Conditions accompanying these technical specifications. The Contractor and all his sub-contractors for this purpose is required to refer specially thereto.
b.
1.02
STAKE AND BATTER BOARDS/SURVEY
a. The contractor shall stake out the lines for the project accurately and establish grades, after which the approval of the Architect and the structural engineer or their representative shall be secured before any further work is commenced. A qualified licensed surveyor must be hired by the Contractor to ensure precise placement and alignment of all the project components due to critic configuration of the plan and site condition. Basic batter brands and basic reference works shall be expected at the expense of the contractor, at some places, where they will not be disturbed during construction or as directed by the structural engineer, the Architect or their representative. Materials shall be stored and works shall be conducted in such a manner as to preserve all reference works set. Re-establishment of reference works where necessitated due to negligence on the part of the contractor shall be done at the expense of the contractor. The contractor shall establish two (2) permanent bench marks from previously known elevations near or within the site of the construction for the purpose of determining any settlement that may occur during the progress of the construction. Elevation reading shall be taken on at least four (4) points on the project structure. A permanent record of the weekly readings shall be kept at the construction site and monthly report thereof shall be submitted to the Architect and the structural engineer unless some unusual reading is observed in which case report shall be made immediately. The contractor shall provide all necessary survey instruments.
b.
c.
d.
e.
f.
g.
1.03
GENERAL EXCAVATIONS
a. The contractor shall make all necessary excavations for the foundations of the project structures to grade as indicated on the drawings. All trenches shall be excavated at a neat size, leveled to a line at the bottom ready to receive the foundation. The contractor shall exercise extra care not to carry the excavation to a depth below elevations shown on the drawings. Work that is excavated to a greater depth than required by the drawings and specifications and which is within the bearing area of the foundation and of floor slabs shall be filled lean compressive strength equal to 17 MPa at the expense of the contractor. No foundation shall rest on fill. Where excavations for foundations reveal that footings will rest on fill, excavations shall be carried further until the desired stratum is reached for safe bearing. All excavations shall be made with allowance allotted for floor slabs
b.
and forms. Bottom of foundations shall be level, clean, and clear of loose materials with the lower section true to size. c. Foundations as indicated on the drawings are designed for a soil bearing pressure of 144 KPa. If however, this bearing pressure is not attained at elevations shown on the drawings, the structural engineer may order any of the following steps taken on their combinations: 1. 2. 3. Boring log or soil bearing test. Excavations for the foundations to be carried out deeper until the soil bearing capacity is obtained. Alteration of the sizes of the foundations to suit the bearing capacity found at the site.
The contractor shall be paid for extra excavations and extra concrete in place, in accordance with the unit prices set forth in this contract. When the nature of the soil is such that good bearing is found to exist at higher elevations than those shown on the drawings, the structural engineer and the Architect may decide to stop excavations at these higher elevations. In case solid rock is encountered, foundations shall be embedded two (2) feet into the rock. Deductions shall be made on the contract price in accordance with the unit prices set forth in this contract. d. All excavations for drainage, sewer and water service and other underground utilities are included in this section.
1.04
UTILITIES
a. When encountered in the work or as indicated protect existing sewer, water, gas, electric, and other utility services, structures, where required for proper execution of the work, relocate them as directed. If the existing active services are not indicated but are encountered, requiring protection or relocation, request in writing for the decision of the owner, his architect or the structural engineer. The contractor shall not proceed until written instructions are obtained from the Owner or his architect, structural engineer or their daily authorized representative.
1.05
BORING AND SOIL BEARING TEST
a. Should it be found necessary to conduct borings and soil bearing test, such work may be ordered by the owner or the structural engineer and performed by the contractor at no extra cost.
2.00 2.01
BACKFILLING, FILLING AND GRADING SCOPE OF WORK
a. Furnish all labor, materials, equipment, plant and other facilities and perform all operations necessary to complete backfilling, filling and grading works shown and herein specified. All work under this section shall be subject to the General Conditions accompanying these specifications. The general contractor and all his sub-contractors for this portion of the work required to refer specially, thereto.
b.
2.02
FILLS AND BACKFILLS
a. Compact and level fill materials other than sub-grade porous fill to a tolerable acceptance to the structural engineer.
b.
Fill materials: Mass fill shall mean selected earth or sand, free from organic materials, trash, or debris and containing no rocks, bricks, broken concrete or similar solid materials. Larger than 150 mm in largest dimension. Submit fill materials samples for approval to the structural engineer before filling. 1. Sub-grade porous fill for use under side walks and floor slabs shall be grades bank gravel with sand. If porous fill, material exist on site, this material will be used first. No selected fill shall be used where area to be filled is more than 500 mm deep, where sand shall be used.
c.
Placing, Compacting and Testing 1. Place mass fill in layers not exceeding 20 cm. when placed by machine earth spreading and compacting equipments. When placed by hand, compact in layers not exceeding 10 cm thickness. Use of hand placement is mandatory where use of heavy spreading and compacting mechanized equipment is impractical, or could possibly damage work in place. Place mass fill to an elevation not closer than 25 cm. below top of finished floor slabs’ elevation and to elevation of underside of pavements. Compact each layer to density of not less than 95% of maximum dry density at optimum moisture content as determined by test conforming to the requirements of ASTM D1557. Where test indicate a higher than optimum moisture content, allow fill to dry and repeat testing and compaction to meet specification requirements before placing additional fill.
2. 3.
4.
2.03
GRADING
a. b. Accomplish rough grading for areas indicated, for open courts, driveways, walkways, etc. Grade by hand, machine or both to achieve rough grades called for by the working drawings. Remove rocks, rubbles, and other non-earth composition materials larger than 75 mm in greatest dimension.
3.00 3.01
CONCRETE AND REINFORCED CONCRETE WORKS SCOPE OF WORK
a. The work covered by this section shall include all labor, materials, equipment, plant, and other facilities for the satisfactory performance of all work necessary to complete all concrete and reinforced concrete work shown on the drawings and as specified herein. All work under this section shall be subject to the General Conditions accompanying these specifications. The General Contractor of the work is required to refer specially, thereto. The intent of these specifications is to cover the complete concrete work for the project and any work called for in these specifications not shown on the drawings or vice-versa, shall be furnished the same as if it were shown on the drawings and called for in these specifications. Also any material which has been committed form both the drawings and specifications but is evidently necessary to complete the project shall be furnished the same as if it were shown on the drawings and called for in these specifications. All concrete and reinforced concrete work shall be done in accordance with the “STANDARD SPECIFICATIONS FOR HIGHWAYS AND BRIDGES” revised and as adopted by the Department of Public Works and Highways and the current American Concrete Institute’s “BUILDING CODE RECQUIREMENTS FOR REINFORCED CONCRETE STRUCTURES” (ACI 318-08). In case of conflict, the later (ACI) shall prevail except as revised in these specifications.
b.
c.
d.
3.02.1
CONCRETE MATERIALS
a. b. c. d. Cement shall conform to all requirements of ASTM C150 (STANDARD SPECIFIACTIONS FOR PORTLAND CEMENT). All cement shall be Portland Cement type. The contractor shall provide suitable means for storing and protecting the cement from dampness. Bags of cement which for any reason have become partially set or which contain lumps of caked cement shall be rejected. The use of cement salvaged from discarded or used bags will not be permitted.
3.02.2
FINE AGGREGATES
a. Fine aggregates used in the composition of concrete, mortar, grout, or plaster shall consist of sand, stone screenings or other approved inert materials with similar characteristics or a combination thereof having clean, hard, strong, durable, sound, uncoated grains free from injurious amount of dust, lumps, soft or laky particles, shale, alkali, organic matter, loam or other deleterious substances and shall contain not more than 3% of materials passing the No. 200 sieve by washing. Fine aggregates shall be free from any substance which will tend to discolor the concrete surface. Fine aggregates shall be graded to conform to the requirements of AASHTO T-27 and or ASTM D33 as tabulated hereunder.
b. c.
------------------------------------------------------------------------------------------------------------Sieve size Percent Passing by weight ------------------------------------------------------------------------------------------------------------3/B” 100% No. 4 90 100% No. 16 45 80% No. 50 5 30% No.100 0 10% ------------------------------------------------------------------------------------------------------------d. The fine aggregates should have a clay lumps and friable particles content of not more than 3% by weight. The specific gravity of which shall not be less than 2.5 nor more than 2.8. The sulphate content of the fine aggregates should not exceed 0.40% by weight as SO chlorides in the fine aggregates shall not exceed 0.10% by weight as chlorine ions. Soundness loss in the sodium sulphate solution per ASTM C 88. Shall not exceed to 10% by weight nor 18% when subjected to magnesium sulphate solution. Absorption per ASTM C 128 shall not exceed 3.0%.
e. f. g.
3.02.3
COARSE AGGREGATE
a. Coarse aggregate shall consist of stone, gravel or other approved inert materials with similar characteristics having clean, hard, sound, strong, durable uncoated particles, free from injurious amount of soft friable, end elongated on laminated pieces, alkali, organic or other deleterious matter. Coarse aggregate shall contain no more than 1.50% of material passing the No. 200 sieve by washing and shall conform to any of the grading requirements as hereunder tabulated.
b.
------------------------------------------------------------------------------------------------------------Sieve Percent Passing by Weight ------------------------------------------------------------------------------------------------------------A B 2 1/2” 100% 100% 2 “ 95 100% 95 100% 1 “ 33 70% 3/4” 35 70% 1/2” 10 30% 3/8” 10 30% No. 4 0 5% 0 5% ------------------------------------------------------------------------------------------------------------c. The coarse aggregate shall have an abrasion loss of not greater than 45% at 500 revolutions when tested in accordance with AASHTO T-96 (LOS ANGELES ABRASION TEST). The coarse aggregate shall be handled by the Contractor in such manner as to prevent segregation. Washing and screening may be carried out by the Contractor in order to conform to the requirements of the Contractor. Requirements for soundness, sulphates and chlorides, clay lumps and friable particles, absorption and specific gravity shall be as specified in the fine aggregates (section 2 above).
d.
e.
3.02.4
WATER
a. The water to be used for the project or for the concrete work shall be potable water. It should available throughout the work and insufficiency could be a cause for halting concreting. Available water shall be allocated as top priority for concrete curing. The water shall be clean, free from injurious amount of oil, acids, salts, alkaline organic matter or any deleterious substances. Total dissolved solids shall not exceed 2000 ppm and sulphate contents shall not be more than 1000 ppm. The potential hydrogen minima shall be 7.00.
3.02.5
REINFORCING STEEL
a. All reinforcing steel bars shall be deformed and shall be new and free from rust, oil, defects, grease, or links. They shall conform to the requirements of ASTM A615 (SI) (STANDARD) SPECIFICATIONS FOR DEFORMED AND PLAIN BILLET STEEL BARS FOR CONCRETE REINFORCEMENTS INCLUDING SUPPLEMENTARY REQUIREMENTS). 1. 2. 3. b. Reinforcements with diameter less or equal to 10 mm shall have a minimum strength of 230 MPa. Reinforcement with diameter greater than 12 mm or equal to 25 mm shall have a minimum yield strength of 275 MPa. Reinforcements of diameter greater than 25 mm shall have a minimum yield strength of fy = 414 MPa.
Steel bars shall be sampled per requirements of ASTM A -370; but in no case lesser than the following schedule. One (1) set of any samples for every twenty (20) tons of bar per size per delivery or a fraction thereof. Where a delivery involves bars casted of different lots; said bars per lot shall be sampled separately.
3.03
STORAGE OF MATERIALS
a. Cement shall be stored immediately upon arrival at the site in substantial, weather-proof bodegas with floor raised from the ground sufficiently high to be free from moisture or dampness.
b. c.
Aggregates shall be stored in such a manner as avoid the intrusion of foreign materials. Reinforcing bars shall be placed in racks raised above the ground and protected from moisture and vegetation. Steel has to be stored under cover or otherwise prevented from rusting. Any material which has deteriorated or which has been damaged shall not be used for concrete.
d.
3.04
TESTING OF MATERIALS
a. The owner or the structural engineer shall have the right to order the test of any material supplied by the Contractor entering into concrete and reinforced concrete whenever there is reasonable doubt as to its suitability for the purpose. For concrete test such test shall conform to the requirements of ASTM C39 (STANDARD METHOD OF TEST FOR COMPRESSIVE STRENGTH OF MOLDED CONCRETE CYLINDERS). For steel such test shall conform to the requirements of ASTM A370 (STANDARD METHODS AND DEFINITIONS FOR MECHANICAL TESTING OF STEEL PRODUCTS). All samples shall be prepared delivered and fetched by the contractor and all cost of test shall be at the expense of the Contractor. Copies of test results shall be furnished to the structural engineer promptly by the contractor.
3.05
STRENGTH OF CONCRETE
a. All concrete without exception shall develop a minimum of 28-day compressive cylinder strength as specified hereunder: 1. 2. 3. 4. b. Foundations……………………………………21 MPa Slab on fill………………………………………21 MPa Beams, girders, column, suspended slabs, others…………………………………………...21 MPa Retaining walls………………………………..21 MPa
Contractor shall submit mix design obtained from at least three standard cylinder samples made in accordance with the “RECOMMENDED PRACTICE FOR SELECTING PROPORTIONS FOR CONCRETE” (ACI 613) for the strength required stating the proposed slump and the proportional weights of cement, aggregates, and water. The mixes shall be approved by preliminary test fourteen days before concreting and shall show the required strength. No substitutions shall be made in the materials or mix without additional test to show the quality for the concrete is satisfactory.
3.06
CONCRETE PROPORTION AND CONSISTENCY
a. The proportions of aggregates to cement for any concrete shall be such as to produce a mixture which will work readily into the corners and angles of the forms and around reinforcements with the method of placing employed in the work, but without permitting the materials to segregate, or excess free water to collect on the surface. The weight of the fine aggregates separated by the No. 4 standard sieve, shall not be less than thirty percent (30%) nor greater than fifty total. The methods of measuring and proportioning concrete materials shall be those that can be accurately controlled and easily checked at any time during the world. Measurement of materials for ready mixed concrete shall conform to the requirements of ASTM C94 (STANDARD SPECIFICATIONS FOR READY-MIXED CONCRETE).
b.
3.07
MIXING CONCRETE
a. No hand mixing shall be allowed except in case of emergency such as mixer breakdown during pouring operations, and shall stop at the first allowed construction joint. All concrete shall be machine mixed for at least 1 ½ minutes after all the materials including water, are in the mixing drum.
b.
The mixer shall be approved size, and type which-will insert a uniform disthrough out the mass. It shall be equipped with a device for accurately measuring and controlling the amount of mixing water in each batch. The first batch of concrete materials placed in the mixer shall contain sufficient excess cement, sand and water to coat the inside of the drum without reducing the content of the mix to be discharged. Retamping of concrete shall not be permitted. Ready-mixed concrete may be used in accordance with the requirements of ASTM C94 (“SPECIFICATIONS FOR READY-MIXED CONCRETE”).
c.
d. e.
3.08
FORMS
a. The contractor shall provide forms that will produce correctly aligned concrete. Plastering in general, shall not be so allowed so that extra care shall be exercised by the contractor in choice of fitting and rigid supporting of the forms. Plywood, metal or surfaced lumber form shall be used for all exposed concrete work. Column forms shall be checked for plumbness before concrete is poured. Hand holes shall be provided in column forms at the lowest points of pour lifts to render this space accessible for cleaning. All girders, beams, centering shall be crowned at least 2.50 cm. in all directions for every seven and a half (7.50) meters of span. However, cambers for all cantilevers shall be as indicated in plans or obtained from the structural engineer.
b.
c.
3.09
PLACING REINFORCEMENTS
a. All reinforcements shall be placed accurately in accordance with the plans furnished by the structural engineer. In case of any doubt or ambiguity in placing the steel, the contractor shall consult with the structural engineer whose decision shall be final in such case. All loose rust, or scale, all adhering materials, and all oil or other materials which tend to destroy bond between the concrete and the reinforcements shall be removed before placing the steel and before pouring begins. Metal reinforcement shall be accurately placed and adequately secured by concrete or metal chair spacers. The clear distance between parallel bars shall be at least 1 1/2 times the diameter of the bar. In no case shall the clear distance between bars except in columns and between multiple layers of bars in beams be less than 2.50 cm. nor, less than 1 1/3 times the maximum size of the coarse aggregates. Where bars are used in two or more layers, the bars in the upper layers shall be placed at a clear distance of not less than 25 mm.
b.
c.
3.10
OFFSETS AND SPLICES IN REINFORCEMENTS
a. In slabs, beams and girders, splices for the reinforcements at points of maximum stresses shall be avoided and may be allowed only if welded or upon the written approval of splice details by the structural engineer. Splices shall be 60 bar diameters for plain bars and 40 bar diameters for deformed bars, or by welding to develop at least 125% of the specified yield strength of the bar. Splices in adjacent bars shall generally be staggered. Dowel bars of at least the same size and number as the main reinforcements shall be placed on all construction joints between foundations and walls, columns, or masonry partitions. Embedment and splice shall each be 40 bar diameters, but the splice may be welded as indicated.
b.
3.11
CURING CONCRETE
a.
Curing shall be done by keeping concrete continuously moist for at least one week after placing. Floors and vertical surfaces may be sprayed with an approved preparation to retard evaporation of water provided such spraying is not objectionable because of subsequent finish. Curing shall begin as soon as concrete has attained initial set. Calcium chloride shall not be allowed in any concrete mix, unless approved in writing by the structural engineer.
b.
4.00 4.01
CEMENT AND MASONRY WORK SCOPE OF WORK
a. The work under this section shall include all labor, materials, equipment, plant and other facilities and the satisfactory performance of all work necessary to complete all cement and masonry work shown on the working drawings and as specified herein. Unless otherwise indicated on the working drawings or specified herein, all materials or work under this section shall be subject to the provisions under 3.00 CONCRETE AND REINFORCED CONCRETE. All work under this section shall be subject to the General Conditions accompanying these technical specifications. The contractor and his sub-contractors are required to refer thereto.
b.
c.
4.02
MORTAR
a. b. c. d. Cement mortar shall be one part Portland cement two parts and by volume but not more than one Portland cement and three parts sand by volume. Mortar materials shall be thoroughly mixed in proportions specified to uniform color and consistency with satisfactory workability. Mortar which shows a tendency to become prematurely dry before, setting time shall have water added to it and shall be remixed. Re-tampering is not permitted. No mortar which has stood for more than one (1) hour shall be used. Work shall not be permitted on mortar that has reached its initial set.
PLUMBING SPECIFICATIONS 1.01 BASIC MATERIALS AND METHOD
a. All materials to be used shall conform with the standards below. Use of materials shall further be governed by other requirements imposed and shall be subject to test necessary to ascertain their fitness if the Owner so requires: 1. 2.0 3.0 PVC Pipes and fittings Galvanized iron for outside waterline Stainless steel for waterline inside the building Class 150 by Moldex or Emerald or approved equal Schedule 40 Schedule 40
4.0 5.0 6.0 7.0 8.0 9.0 10. 11.0 12.0 13.0 b.
Hot Waterlines Water Heater Floor Drain Roof drain on G.I. gutter Bronze Gate Valve Check Valve Water Meter Pump Pressure Tank Polypropylene pipes & fittings
Copper, Type L, hard drawn National DH-112 ASA Metals ASA 40-9 size 50mm Stainless Steel wire basket Strainer class 125 by Kitz or Toyo class 125# by Kitz or Toyo Arads or Asahi Goulds or approved equal Stainless steel, gage 12 Ecosan, Vesbo or Fusiotherm
Alternate Materials: Use of any material, not specified in these specifications may be allowed provide such alternate has been approved by the Owner and provided further that the test, it required, shall be done by an approved agency in accordance with the generally accepted standards. Identification of Materials: Each length of pipe, fitting, trap, fixture or device used in the plumbing system shall have cast or stamped or device used in the plumbing system shall have cast or stamped or indelibly marked on it. The manufacturer’s trademark or name, the weight, type and class of product when required by the standards mentioned above.
c.
2.0
PLUMBING a. GENERAL
1. 2. Applicable provision of “general conditions” govern work under this section. The Contractor shall provide all times, articles, materials, operations or methods listed, mentioned, or scheduled on the drawings and/or specified, including all labor, materials, equipment and incidentals for their completion. All fittings, connections, piping, hidden or embedded in concrete shall be subject to inspection by the Owner or his representative before covering. The drawings and Specifications are complementary to each other and any labor or materials called by either, whether or not called of by both, if necessary for the successful operation of any of the particular type of equipment shall b furnished and installed without additional cost to there Owner. Intent – it isn’t intended that the Drawings shall show every pipe, fittings, valve, and appliance. All such items whether specifically mentioned or not, nor indicated on the drawings shall be furnished and installed if necessary to complete the system in accordance with the best practice of the plumbing trade and to the satisfaction of the Owner.
3. 4.
5.
b.
WORK INCLUDED
1. Work included under this Section of the Specification consist in furnishing all labor, tools, equipment, appliances, and materials necessary for complete installation, testing and operation of the water distribution system in accordance with Specification and all applicable drawings in the contract. a. b. c. d. Water distribution piping system Sanitary drainage piping system Storm drainage piping system Payment for all permits necessary to the completion of the work ready for service.
3.0
COLD WATER SYSTEM
All waterlines outside the building shall be U-PVC Blue (modex). All waterlines inside the building shall be uPVC blue (moldex). All hot waterlines shall be copper, type L, hard drawn or polypropylene by Vesbo. All waterlines shall be tested at 100 psi for two hours before covering. All waterlines shall be disinfected.
4.0
SANITARY DARINAGE SYSTEM
All sanitary waste and vent pipes and fittings shall be PVC series 1000. All sanitary drainage pipes shall slope at one percent.
5.0
STORM DRAINAGE SYSTEM
All downspouts shall be PVC, series 1000. All storm drainage piping system shall slope at one-half percent.
TECHNICAL SPECIFICATIONS for ELECTRICAL WORKS
1. 2.
All electrical works shall conform strictly to the latest edition of the Philippine Electrical Code, and the rules and regulations of Quezon City. The work to be done shall include the furnishing of all labor and materials and tools required to construct and complete the electrical system as shown on drawings as follows: a. b. c. d. e. Lighting and power system Telephone system Cable Television System Intercom System Power and Telephone service entrance
3. 4.
Conduits: Use intermediate metallic conduit (IMC) for all service entrance work equal to Matsushita or Allied Use C for all concealed and embedded work equal to Emerald or Neltex. Wires and Cables: All wires shall be copper, soft drawn and annealed, standard gage size as indicated. Wires and cables shall be Phelps Dodge, American Wire and Cable or approved equivalent. All exposed conduit work above ceiling shall be properly and securely fastened with malleable clamps with tox and screw at intervals of every 1.5 meters. Switches: Flush, quiet type, 15-ampere rating, bakelite cover. National, Gewiss, or approved equivalent. Color and finish to be approved by the Architect. Receptacles: Standard 15-ampere rating, 250 V, duplex grounding type for flush mounting. National, Gewiss, or approved equivalent. Color and finish to be approved by the Architect. Lighting Fixtures: Shall be furnished and installed by the Electrical Contractor as shown in the plans. Ballasts shall be rapid start, high power factor equal to G.E. Fluorescent lamp shall be daylight type. Grounding: All metallic conduits, supports, cabinets and equipment shall be properly grounded. Guarantee: The completed installation shall be guaranteed to be free from defective materials and workmanship for a period of 12 months from the date of acceptance. Any defect which may appear for the aforesaid period shall be remedied at the expense of the Electrical Contractor.
5. 6. 7. 8.
9. 10.
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