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BALIUAG UNIVERSITY
Baliwag, Bulacan

COLLEGE OF ENVIRONMENTAL DESIGN AND
ENGINEERING

CE 518
CE LAWS, CONTRACTS AND ETHICS

Documentation of Contracts
MARCH 20, 2014

Submitted by:
Viola, Randy V.
BSCE-V

Submitted to:
Engr. Amelita B. Cruz

Specification of the Plans:
CONSTRUCTION SPECIFICATIONS
This set of specifications shall govern the methods of construction and the kind
of materials to be used for the proposed building shown in the plans and detail
drawings.
The plans, detail drawings and these specifications shall be considered as
complementing each other, so that what is mentioned or shown in the other, shall be
considered as appearing on both. In case of conflict between the two, the same should
be referred to the designing Engineer for resolution.
GENERAL CONDITIONS
All parts of the construction shall be finished with first class workmanship, to the
fullest talent and meaning of the plans and these specifications and to the satisfactions
of the Engineer and the Owner.
The construction shall conform to all the requirements of the National Building
Code, as well as the local rules and regulations of the Municipality of San Rafael,
Philippines.
CLEARING THE SITE
The building site shall be leveled according to all the plans and cleared to
rubbish, roots and other perishable and objectionable matters to a suitable subgrade.
All such unsuitable materials shall be removed from the building site and spread
uniformly over the areas adjacent to the proposed building, or otherwise disposed of as
may be directed by the Engineer in charge of the construction.
STAKING OUT THE BUILDING LINES
The building lines shall be staked out and all lines and grades shown in the
drawing established before any excavation is started. Batterboards and reference marks
shall be erected all such places where they will not disturbed during the excavation of
the building.
EXCAVATION
All excavation shall be grade indicated in the drawings. Where the building site is
covered with any kind of fill, the excavation for footings should be made deeper until
the stratum for safe bearing capacity of the soil is reached.
Whenever water is encountered in the excavation process, it shall be removed by
bailing or pumping, care being taken that the surrounding soil particles are not
disturbed or removed.
BACKFILLS
After concrete for foundations is hard enough to withstand pressure resulting
from fills, the materials removed from excavation shall be used for backfill around them.
Backfill and fills shall be placed in layers not exceeding 150mm in thickness, and
each layer shall be thoroughly compacted by wetting, tamping and rolling.

CONCRETE WORKS
All concrete shall be mixed thoroughly until there is a uniform distribution of the
cement and aggregates, and should be deposited as nearly as practicable in its final
position, care being taken to avoid segregation of the aggregates.
Water to be used for mixing concrete shall be clean and free form injurious
amount of oil, acids, alkalis, salts and other organic materials.
PROPORTIONING OF CONCRETE
All concrete works shall be done in accordance with the standard specifications
for plain and reinforced concrete as adopted by the Government. Cement to be used
shall be Holcim Excel Portland cement or any other equivalent brands more readily
available in the locality. Alternative cements so selected must meet the requirements of
Portland cements and approved by the Engineer in charge of construction.
The following proportions of concrete mixtures shall be used for various parts of
the building:
Columns and footings
Class A (1:2:4)
Concrete Hollow Blocks Footings
Class B (1:2 ½ :5)
Reinforced Concrete Beams and Slabs
Class A (1:2:4)
Concrete Slab floor on fill
Class A (1:3:6)
Septic Vault cover
Class A (1:2:4)
Class A concrete shall be a mixture of 1 part cement, 2 parts fine aggregates and
4 parts coarse aggregates by volume, plus enough water to make the mixture into
pliable paste.
Class B concrete shall be a mixture of 1 part cement, 2 1/2 parts fine aggregates and 5
parts coarse aggregates by volume, plus enough water to make the mixture into pliable
paste.
Class C concrete shall be a mixture of 1 part cement, 3 parts fine aggregates and 6
parts coarse aggregates by volume, plus enough water to make the mixture into pliable
paste.
The fine and aggregate for concrete shall consist of natural sand, or of inert materials
with similar characteristics, having clean, hard and durable grains, free from organic
matter or loam.
The coarse aggregates for concrete shall consist of crushed rock of durable and
strong qualities or clean and hard gravel. Sizes of the coarse aggregate to be used shall
vary from 20mm to 40mm(3/4” to 1 ½”).
FORMS FOR CONCRETE WORKS
All forms of concrete works shall be properly braced or connected together so as
to maintain the correct position and shapes of the concrete members. Forms shall be
constructed sufficiently tight to prevent bulging and seepage of water.
Forms shall not be removed until the concrete has attained sufficient strength to
support its own weight and any loads that may be placed on it. Side forms of beams and
girders may be removed earlier than the bottom forms but additional posts or shoring
must be placed under the beams or girders until they have attained their strength.
CONCRETE SLAB FLOORS ON FILL
Concrete slab on fill shall be poured on a gravel bed of not less than 100mm
thick. Each concrete slab course to be poured shall not be more than one meter wide,
and each course shall be poured alternately to the indicated floor finish.

STEEL REINFORCING BARS
All steel reinforcing bars to be used in this construction shall consist of round
deformed bars with lugs or projection in their sides to provide a greater bond between
the concrete and the steel. All steel reinforcing bars to be used shall be Grade 300.
All steel reinforcing bars shall be accurately placed and secured against
displacement by tying them together at each bar intersection with Gauge No. 16
galvanized iron wire.
The steel reinforcing bars indicated for footings, columns, slabs, beams, girders,
and other concrete members shall all conform to the number, size and spacing as
indicated in the drawing or schedule of steel reinforcements.
No metal reinforcement shall be installed in place unless it is free from rust, scale
or other coatings, which will destroy or reduce the bond with concrete.
CONCRETE HOLLOW BLOCKS
Concrete hollow blocks to be used in this project shall be 4” for the interior walls
and 6” for the exterior walls.
All exterior concrete hollow blocks to be used for first floor walls shall be at least
150mm thick, while concrete hollow blocks for interior walls unless otherwise
indicated, shall be 100mm thick. For interior CHB walls where plumbing pipes and
fittings shall be located, the thickness shall be at least 150mm.
Concrete hollow blocks to be used for walls above the first floor, shall be 100mm
thick.
The concrete hollow block walls shall be laid, and the cells filled with cement
mortar consisting of 1 part Portland cement and 3 parts sand by volume. They shall be
reinforced with round deformed bars, 10mm diameter, spaced not more than 0.80m on
centers, bothways.
All exposed surfaces of concrete hollow block walls shall be finished with the
specified materials indicated on the elevation drawings.
The mixture of cement plaster for concrete hollow block wall finishes indicated
in the drawings shall be 1 part cement, 1 part lime and 3 parts sand.
TILE WALL AND FLOOR FINISHES
The toilet and bathroom shall be finished with ceramic tiles carrying the Class B
glazed tiles.
The walls of the toilets, bathrooms, top of kitchen cabinets, and laundry tub and
their adjacent walls shall be wainscoted with 200mm x 200mm (8”x 8”) tiles.
Interior and exterior corners of tiled floor and walls shall be provided with the
necessary tile mouldings.
All tiles for floor, walls and mouldings shall be free from laminations, serrated
edges, chipped-off corners and other defects, which would adversely affect their
appearance and strength. All joints between tiles and mouldings shall be filled with
white cement and then carefully wiped.
Before the tiles and mouldings are laid in place, they shall be thoroughly soaked
in water if recommended by the manufacturer. Mortar to be used in setting the tiles and
moldings shall be a mixture of 1 part cement and 2 parts sand by volume.

LUMBER
Lumber to be used in this project shall be well seasoned, thoroughly dry and free
from loose or unsound knots, shakes or other imperfections impairing their strength or
appearances.
The kind of lumber to be used for the various parts of the building shall be as
follows:
Exterior door frames
Tangile
Interior door frames
Tangile
Wall Studs, Ceiling Joists
Tangile
Fascia Boards, Cabinet/Closet Shelves
Tangile
FRAMES
All wood frames for windows, doors, cabinets and closets shall be done as much
as possible, with carefully fitted mortise and tenon joints. As door and window frames
to be installed on concrete hollow block and other masonry walls shall be anchored
with 76mm (3”) common wire nails all around the contact surfaces. And all such contact
surfaces shall first be painted with wood preservative before the frames are installed in
place.
All unexposed lumber such as posts, plates, floor and roof beams, trusses or
rafters, floor joists and bridgings, purlins, cleats, ceiling joists, wall studs, etc. shall
likewise be treated with wood preservative after they have been installed in place.
ROOFING
The roof shall be covered with APO pre-painted roofing sheets as shown on the
plans. The roofing sheets shall be secured to the purlins with 5mm diameter (1/4” dia.)
GI rivets and Gauge No.26 plain GI straps cut long enough for bending around the
specified size of purlins. The straps shall each be at least 25mm wide with corners
chipped off at the riveting ends.
Ridge rolls, hip rolls and valleys to be used shall be those compatible with the APO prepainted long span roofing sheets. They shall lap the roofing sheets at least 250mm. The
ridge rolls, hip rolls and valleys shall be riveted to the roofing sheets. In addition to the
rivets engaging the GI straps in securing the roofing sheets to the purlins.
All roofing sheets adjacent to concrete hollow block and other masonry walls
such as at property line firewalls shall be provided with Gauge No. 26 GI flashing to
extend up to the top and over to the other side of the walls. All rivets shall be placed at
the top of the corrugations of the roofing sheets to prevent water from standing around
the rivets.
ELECTRICAL WORKS
The electrical installation shall be done in accordance with the approved plans
and under the direct supervision control of a licensed Professional Electrical Engineer
or Master Electrician.
All electric works and materials shall conform to the provisions of the latest
edition of the Philippine or National Electric Code.
The electrical wiring shall be installed thru Neltexcoilable PVC electrical conduit,
fittings and appurtenances that conform with ISO dimensions.
The type of electrical services to be supplied to the building shall be 220V, AC
single phase.

There shall be only one service drop from the nearest MERALCO pole to the
proposed building. Electric wires for light and power shall not be smaller than 13.5mm 2
(AWG No. 12). 600V installation.
Electrical materials to be used for the electric installation shall be as follows:
Automatic Circuit Breaker
20 AMP
Flush wall switches, Convenience Outlet & other
20 AMP
Wiring devices
Wires/Conductors
13.5 mm2
The spare circuit shall be provided with an empty PVC pipe, size 19mm dia.
which should extend at least 300mm above the ceiling line. The grounding wires shall
be identified and all wires shall be color coded for easy identification.
The panelboard shall be provided with a circuit directory.
PLUMBING WORKS
All plumbing works for his project shall be done in accordance with the approved
plans and under the direct supervision and control of a licensed Sanitary Engineer or
Master Plumber.
Piping shall be properly graded or pitched to ensure easy circulation, drainage
and prevent water hammer and noise.
The plumbing installation shall conform with the provisions of the National
Plumbing Code and the rules and regulations enforced in the locality.
Piping for drain, waste and vent shall be done using NeltexuPVC push-on system.
For the in-house water supply installation, NeltexuPVC pipes and fittings shall be used.
The plumbing fixtures and accessories to be provided and installed shall be as
follows:
Water Closets
American Standard
Lavatories
American Standard
Kitchen Sinks
APO
Shower Heads
American Standard
Soap Holder
American Standard
Toil Paper Holder
American Standard
Floor Drain
size 100mm x 100mm Stainless Steel
Where a sanitary sewer system of sewage disposal is not in operation in the
locality, a standard septic vault shall be constructed as shown in the drawings.
DOORS AND DOOR FRAMES
Doors and door frames shall conform to the sizes, designs and kind of materials
shown in the details of doors, schedule of doors or as per bill of materials.
All wooden doors shall be hung on at least 3 pieces of 102mm x 102mm (4” x 4”)
loose-pin bearing template hinges.
Door locksets to be used shall be ordinary brand to be installed 1024mm from
the finished floor line.
Rails and rollers for the sliding doors shall be ordinary brand.
SLIDING WINDOWS
Sliding windows to be used in this project shall conform to the size and designs
shown in the detail drawings or schedule of sliding windows, or as per the bill of
materials.

STORM DRAINAGE
All downspouts from the roof gutters shall end in concrete catch basins to which
6” dia. reinforced concrete drainage pipes shall be connected leading to the street gutter
fronting the building.
PAINTING
All painting work for this project except as hereinafter specified, shall be done
with the use of Boysen paint products.
The painting contractor shall supply all paint materials, tool, staging and
equipment necessary and shall be perform all painting and finishing work as shown in
the schedule of painting and finishing work for his project.
The painting contractor shall store his materials in one place to the building kept
neat and clean, care being taken in the storage of paints, oils, etc. to prevent danger of
fire. Oily rags shall be kept in metal containers and shall be removed from the building
every end of the working day.
Upon completion of the painting works, the painting contractor shall remove any
paint spots from all finished work. He shall present his work to the Project owner or
Engineer in-charge of construction free from blemishes and rubbish generated by his
workers.
It shall be the painting contractor’s responsibility to protect his work and those
of other contractors during the time his work is underway. He shall be responsible for
any damage to the work or property of others caused by his employees or by himself.
Before any panting is done, all surfaces shall be cleaned, smoothed and freed
from dust, dirt, grease, mortar, rust, and other foreign substances. All parts where paint
remover has been used shall be washed off with paint or lacquer thinner. All paints shall
be spread evenly and carefully.
All paint and paint materials shall be delivered to the building site in unbroken
packages, bearing the marks of the specified brand. No adulteration of specified paints
with other brands shall be allowed.

RANDY V. VIOLA
Project Owner

NOTICE TO PROCEED
March 20, 2014
Engr. Amelita B. Cruz
Concepcion, Baliwag
Bulacan 3006

Subject:

Construction of an Apartment Building

Dear Maam:
You are hereby authorized to proceed on the above referenced contract beginning March 25,
2014. This contract calls for all work to be completed in 180 calendar days. Therefore, the
contract completion date is established as. Please be sure to review the contract proper
pertaining to Liquidated Damages.
For our mutual benefit, a survey of the site with the Project Manager, Engr. Lourdes B.
Hipolito will be done prior to start of the project and you will accept the site for
construction. Damages and irregularities existing on the site, not noted during this preconstruction survey, may be assumed to be caused by your operation.
We are looking forward to a cooperative and expeditious completion of the project.

Sincerely,
Randy V. Viola
Project Owner

February 26, 2014
NOTICE OF AWARD

SUCCESSFUL BIDDER
Engr. Amelita B. Cruz
Concepcion, Baliwag
Bulacan 3006

SUBJECT: Construction of an Apartment Building

Dear Madame:
This is to inform you that upon evaluation of your bid proposal for Construction of an
Apartment Building After careful review, the project owner is awarding this procurement
to Engr. Amelita B. Cruz.
It is hereby resolve to award the said project to your firm with a contract amount of Two
Million Four Hundred Seventy Two Thousand Five Hundred Ninety Nine Pesos
(2,472,599.00), and delivery of period of 30 days from receipt of purchase order.

Sincerely Yours,
Randy V. Viola

LETTER OF INTENT
Engr. Amelita B. Cruz
Concepcion, Baliwag
Bulacan 3006
[email protected]

January 06, 2014

Randy V. Viola
Construction bid for Apartment Building
418 Maronquillo San Rafael,
Bulacan 2014

Dear Sir/Madame:
In response to the Invitation to Apply for the Eligibility and to Bid for the Construction of
the Apartment Building located at Maronquillo, San Rafael, Bulacan, which I received, I
would like to express my intention to apply for eligibility to participate in the said bidding.
If found eligible, I commit to purchase the Bidding Documents for the said contract and to
submit a bid therefore.

Sincerely,
Engr. Amelita B. Cruz

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