TEKTON CONSTRUCTION CORP.

CONSTRUCTION METHODOLOGY

Project: Paseo 6 Carpark Building

Location: Greenfield City, Sta. Rosa, Laguna

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 METHOD OF STATEMENT

This Method Statement is prepared to ensure that the construction of Paseo 6 Carpark Building shall comply on
plans and specifications and all relevant standard and code requirements in the execution of different work
activities to be performed in the construction of the plant and other relevant structures associated with this project
in general. In addition, this will serve as a tool to guide all technical personnel and layman execute proper
construction procedures complied with the quality and safety plans for the project.

CONSTRUCTION PROCEDURE

This work procedure is described as follows;

A. PREPARATION

Temporary yard such as stockpile and fabrication yard for building work shall be prepared within the
site after soil improvement. Location and plan shall be considered to avoid traffic congestions during
mobilization of materials, machines and obstruction to construction during the course of different
activities in the site.

It is necessary to set up a fabrication yard in order to carry out the fabrication of reinforcing bars,
formwork, steel frames and so on. And also, those fabricated, cast, assembled products will be
temporarily stocked at the stock yard. The yards will be graded flat at the designated area with
adequate drainage.

Joint survey with the Engineer’s representative shall be carried out to establish control points and
confirm the coordinates and elevation prior to the commencement of the construction works.

After confirming the coordinates and elevations of all the building location, survey location for piling
and excavation shall be carried out each stage of the works.

B. EARTH WORK

B.1 Excavation work

Excavation shall be done in a safe and sequential manner on the basis of the prepared plan
drawings and in accordance with the instructions by the Engineer.

The excavation method is either machine or manual cut, and care is to be taken not to disturb
the soil below the supporting ground. If deep trenching needs shoring, proper lateral sheeting
and struts shall be provided for safety.

During excavation, drainage ditch shall be provided and sloping down to sump pit to prevent
flooding within the work area in case rain occurs. Earth excavation with sloped roof and
surface drainage to avoid scouring off part of excavation pit.

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 Unsuitable material and waste matters shall be removed from site to the waste yard in
accordance with the specification requirements.

After excavation, the bottom surface of pit shall be compacted to not less than 95% of
maximum dry density by vibratory plate compactor and the slope shall be trimmed off to
avoid collapse of pit wall.

B.2 Backfilling work

Approved suitable material should be used for backfilling. Compaction standard shall be
employed in the execution of this work. Fill materials shall be distributed evenly to the
backfill area to a specified thickness of compaction = 150mm thick and compacted by
portable compactor to a specified compaction factor. Sprinkle water to the earth fill in
compliance with the allowable moisture contents specified before start of compaction. Every
layer shall be tested for compaction to assure that this particular work is checked and
complied with the governing specification.

C. REINFORCEMENT WORK

Manufacturer of reinforcing bar shall be proposed to the Engineer for accreditation and approval.
No deliveries shall be accepted for use without decision by the engineer.

Every delivery of reinforcing bar supply for construction, the quantity and physical properties
shall be checked by the Contractor. The quality shall be confirmed by checking mill certificate
issued by the manufacturer through the comparison of the laboratory test result of specimen taken
from the different kinds of diameter in the delivered product.

C.1 Material

Round bar & deformed bar shall conform to ASTM A-615 with minimum Fy = 414 MPa
(60,000 psi).

C.2 Reinforcement storage before fabrication

 Reinforcement will be stored in an area at site with adequate protection from getting
rusty, or protected from any element that would affect its quality condition as specified.

 Storing will be organized by category, type, grade and diameter. As a rule, the end of
each bar had been painted to differentiate the different grades.

 Reinforcing steel that are rejected have to be stored in a separate place away from where
it was accepted, before sending back to the supplier.

C.3 Reinforcement fabrication process

1. Reinforcement fabrication and storage

 Workers will fabricate the bar according to the information mentioned on the label, and
fabricated bars will be stored systematically according to their structural usage per work

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 unit mentioned on their label (work unit, structure, drawing, category, type, diameter,
grade…)

 All precautions will be taken to avoid damage and bending the steel bars during storage,
loading and transportation to the site. The bars should be protected from the rust by
storage on wooden platform, crates or elevated trestles.

2. Installation at site.

 The reinforcement installation will be in accordance with the drawings, the General
Technical Specifications, and the Owner requirements (cover, spacer blocks,
reinforcement continuity and tolerances).

 Before any pouring, all the reinforcement shall be inspected and accepted by the
Engineer or the owner’s representative.

 The foreman on site will correct any deviation out of tolerances immediately upon
notice before filling the inspection request.

D. FORMWORK

D.1 Formwork Set-Up:

Blinding concrete shall be installed prior to placing formwork.

Form made of plywood or steel shall be cleaned on all its surfaces in contact with concrete
shall be treated or painted with oil prior to the installation. Installation shall be made
precisely on the lines and grades using string, spirit level, survey instrument, etc.

Forms shall be kept firmly in position by putting tie rods or external support. Tie rods
support shall be so arranged and distributed and strong enough to withstand the pressure
during casting concrete.

D.2 Construction method

 Foundations shall be constructed first and then columns to the tripod beam bottom level.
In the workshop building, sub-columns and sub-beams system on wall, beam surface
form will be done after the installation of steel framework.

 Establish accurate centerline axis and level for the layout of foundations, columns,
beams and floors, before installing forms.

 Form should be adequately supported or braced to avoid movements of displacements

during casting concrete. Bolt connector or any acceptable prefabricated support system
is essential.

 Check the alignment of formwork by stretching a cord alone edges of installed forms.

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  For additional supports, iron and tension cable can be used as supports in the installation
of forms of column footings. Check the establish centerline for accuracy to avoid
deviations.

 Staging and scaffolding support system is to be utilized for beams and slab forms, and
they are installed at the same time. During installation regular checking of lines and
grades shall be made to ensure the evenness and straightness of slabs and beams during
construction.

 Position steel and wood joist supports and bracings is utilized for forms of concrete
structures. Jacks are installed at top and base of supports for adjusting height or length,
all bases of support should be propped by a piece of wooden material to prevent
settlement.

 All supporting columns and bracings should be anchored, hold and connect together to
become stable frame system to secure structures during concreting.

E. CONCRETE WORK

E.1 Material

The class of concrete for each section of the works shall comply with the ACI-318-08
building code for reinforced concrete and ASTM standards.

Design mix shall be submitted and approved by the engineer and trial mix shall be conducted
to confirm the compression strength and satisfy the specification.

In general, concrete must be casted within 60 minutes from mixing to placing. The concrete
temperature shall be below 35°C as specified at the point of pouring. Other measures to keep
the concrete temperature low is to keep the aggregates and water cool, or arrange early
morning pouring to avoid casting daytime which has high humidity condition.

E.2 Construction method

Concrete Pouring and Treatment Requirements:

 Do not change position, bend shape of reinforcement, position of formwork and

thickness of concrete cover.

 Do not use vibrator to displace horizontally the concrete mix.

 Concrete shall be poured continuously up to finish grade or construction joints indicated

on the drawing shall be followed when there is a tendency to stop pouring.

 Tremie pipe shall be utilized when pouring concrete beyond manual reach or above
ground to avoid segregation of the ready mix concrete during pouring and maximum
falling height be 1.5m.

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  Use concrete spacer between formwork and reinforcement to avoid displacement of
reinforcement during concrete placement.

 Concrete shall be continuously poured until one component is finished to avoid cold
joints.

 Structural components such as column, wall which is higher than 1.5m shall be provided
with openings at 1.5m maximum vertical spacing to avoid concrete from segregation
during pouring and to abide by the standard height of pour of 1.5 meters.

 Use concrete vibrator to compact mix, vibration time shall be from 20 to 30 seconds.
Use trowel to level the concrete surface.

 If the concreting is too large in quantity that one time pouring is impossible, the
contractor shall provide proper construction joints in accordance with the specification.
These joints shall be located at places that have minimum effect of moment and shear,
usually located at 1/3 or 2/3 points of the span of the structure or refer to the
specifications on construction joints. Before casting the remaining portion roughened
surface to ensure bonding with new concrete.

 Concrete shall be poured in layers from 20-30cm then vibrate in accordance with the
specified time. Number of vibrator depends on the concreting area, at least 3 stand-by
vibrators in every concreting location as back up for conked out units.

 Concrete for slab shall be leveled right after pouring. Precast concrete pieces for level
control points shall be provided and removed before casted concrete gets hard.

 Concrete curing: 24 hours after Casting.

 All concrete shall be cured by either spraying water directly or spraying water on a mat
placed on the concrete surface.

 Water curing by sprinkling process shall be repeated whenever the water dries up and
maintain the concrete wet for a period of 7 days.

 Concrete Finishing: Upon removing formworks, concrete surface shall be finished,

repaired of any defects to ensure evenness and uniformity in color. All concrete surfaces
shall be free from any irregularities. A waterproofing coat may also be applied to a
selected location as specified.

E.3 Testing and Check for Acceptance

Concrete specimens for strength test shall be obtained in every 20m 3 batch group, and taken
at the same time and place. Test sample standard dimensions are Ø=150mm x h=300mm
cylinder.

F. STRUCTURAL STEEL & ROOFING WORK

F.1 Structural Steel

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 Material and Receiving

Manufacturer of steel materials shall be proposed to the engineer for approval prior to
procurement and delivery. All steel materials delivered to the fabrication shop, shall be
inspected and checked by the recipient. Delivery dockets, mill certificates, quantity and
physically properly checking of the material shall be performed before unloading. Inferior
and substandard materials are rejected and prevented from unloading. The materials
technical data from the mill certificate shall be confirmed by conducting laboratory test on
sample taken from the delivered materials. Usage of the materials depends on the test result
for the specified stress requirements.

Shop Fabrication

Prior to fabrication. Shop drawings shall be submitted to the engineer for approval. Bended
steel members shall conform to the approved shop drawing. In order to maintain quality
and minimize the installations and assembly period. Painting must be done in the
fabrication yard.

Erection Works

Detailed erection sequence for each structure approved by the Engineer shall be acquired
prior to erection. Mobile cranes will be used for the erection. Temporary bracings shall be
prepared before columns erection in order to maintain the vertically and alignment. After
checking proper alignment, fasten these steel members by connectors of high strength bolt
and tighten it according to its specified torque moment requirement by using torque wrench
or special tightening hand tool. Touch-up paint will be applied to all scratched surfaces to
restore its required texture surfaces.

Metal Roofing and Cladding Work

The material for metal roofing and cladding, including shop drawing requirements for this
work shall be submitted to the Engineer for approval. The material shall be fabricated based
on the approved shop drawings submitted to the manufacturer.

Basic Steps for installation of metal roofing and cladding is explained below.

Step 1: Establish the grids and elevations based on the standard procedure in executing this
work item or relevant acceptable method through markings using stretched string or wire
along its grid or elevation.

Step 2: Fixing metal sheets onto purlin and girt using self-tapping screws.

Step 3: Sealant shall be applied at proper wrapped portion based on the manufacturer’s
shop drawing.

Step 4: Fix flashings, trims, gutters, downspout pipes and louvers.

F.2 Roofing Work

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 Roofing material and shop drawing for this type of work shall be submitted to the engineer
for approval.

Installation procedure shall conform to manufacturer’s product technical specification on

installation. Precautions against accident shall be well considered for its sensitiveness in
executing this work.

Before placing waterproofing membrane, the surface shall be thoroughly cleaned and
primer paint shall be applied in dry condition. Apply waterproofing membrane on primer
coated surface, by pre-heating to adhere firmly. Overlapping portion of waterproofing
membrane shall be carefully bonded with each other to avoid water leakage.

G. MASONRY WORK

Material Sample and technical data of hollow brick shall be submitted to the Engineer for
approval.

Bricks between column and lintel supports shall be arranged in accordance with the specification
and drawings.

The mortar composition is the mixture of cement, sand and water by correct proportion specified.
For volume 3:5:1, for reinforced block work and elsewhere. The mixing and kneading is to be
done by manual mixing or a small portable mixer. Adequate and sufficient application of mortar
for horizontal joints shall be applied, and bricks shall be wetted before laying. The mortar for
vertical joints shall be filled up by trowel during block laying and the ends of the brick must be
“buttered” to enhance firm connection. Excess mortar that came out on the surface shall be
scraped out with a trowel. All horizontal and vertical joints shall have full mortar coverage. The
mortar squeezed from the joints shall be flushed with the adjoining installed bricks. Finish joints
to face work after mortar has begun to stiffen by square raking. Follow specified standard for the
maximum layer of bricks installation per day.

G.1 Work preparation

 After moving formwork of slab, floor cleaning shall be done for marking.

 Survey group shall reestablish center line, ink marks shall be applied to a relocated
margin lines of brick walls on columns and slabs.

 Adjust deviated anchor bars that will connect to brick walls.

 Mobilize bricks, cement, mortar, water, scaffolding to construction area.

G.2 Construction order

 Brick work shall be constructed from bottom to top process, main walls shall be laid
first followed by partition walls.

 Boundary walls shall be built first followed by partition wall.

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 G.3 Checking

 Check regularly the verticality and straightness during brick laying by ruler and plumb.

 Stretch cord to both ends to ensure brick laying course are in straight line.

H. FINISHING WORK

H.1 Door and Window works

Doors, louvers and windows shall be of the approved ones and in compliance with the
specification. Installations shall be made in accordance with the schedule to keep finishing
work in sequence and to avoid lapping of activities that cause delay or damage impact to
other finishing work. Installed doors, louvers and windows shall be kept protected to avoid
damages caused by other ongoing finishing works and other parties.

H.2 Plastering

The thickness and mix proportion of mortar for plastering or rendering shall be in accordance
with the specification and the mixing and kneading process is to be done manually or by
portable mixer. Cement shall be of the standard ordinary Portland cement and sand, sourced
out from land or river and shall be approved by the Engineer.

H.3 Tiling

Tile material and shop drawing for tile layout or arrangement shall be submitted to engineer
for approval. Prior to tile laying concrete surface where tile is laid shall be cleaned, free from
dust, oil, grease and other elements that would affect quality of tile bed mortar. Bed mortar of
specified mix proportion (1:3) is placed and spaced evenly with a minimum thickness of
10mm over the area to be tiled. Tiles are then laid over the evenly applied bed mortar until it
adheres firmly in place. Tile gaps shall be filled up with grout of approved type or as
specified in the plan. After grouting tiled area shall be cleaned from excess grout to keep the
work clean as specified.

H.4 Painting

Paint material shall be of the approved one in accordance with specification. Surface
preparation before painting shall conform to the manufacturer’s instruction to each kind of
paint material. Number of coat, dry film thickness shall comply with the approved paint
schedule. Where required, final coat shall be carried out, after or almost all of the work
nearby is completed to minimize damage.

H.5 Ceiling Work

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 The material for ceiling shall be submitted to the engineer for approval. Shop drawing for
ceiling layout and arrangement plan shall be approved by the Engineer. And proper
coordination to M/E works shall be made to avoid lapping of works that cause delay in
executing the work.

Hangers shall be installed, fastened and fixed properly under the concrete slab or steel
structural members. Then thin gauge and light steel frame is installed to enhance level
adjustments’ required. M&E works above ceiling shall be completed before installing the
ceiling frame.

Deflections or damage on the T-runner frame shall be repaired prior to installation of the
gypsum board.

I. MECHANICAL & ELECTRICAL WORK

I.1 Air conditioning and Ventilation Work

Manufacturer and Equipment of Air Conditioning and Ventilation system including shop
drawing plans and all schematic layouts for these works shall be submitted to the Engineer
for approval. All slots in exterior walls intended for pipe crossing shall be made impervious.
Shop drawings of ceilings and walls shall reflect location of air conditioner, ventilator and
ducts, to account for the balance distribution of other equipment. Installation of air
conditioner, ventilator, air inlet and outlet, including pipes, ducts and other related fittings
shall conform as indicated in the shop drawings. Exhaust pipe/duct shall slope downward
from inside to outside.

I.2 Plumbing Work

Material and equipment for plumbing work and shop drawings shall be submitted to the
engineer for approval.

Excavation and trenching of soil, preparation of sleeves on floor, wall and beam where there
are necessary in structures shall be well considered.

Before being installed, all pipes shall be thoroughly cleaned, free from any scales, burns,
rusts and obstructions.

Prefabrication, installation and jointing of pipes (including fittings) with adhesive for PVC
material, including valves, strainers, and flexible joints shall be done carefully.

Adequate pipe supports, hanging steel bars and anchorage shall be provided.

Sealing of pipe sleeves shall be done properly.

Pressure test for water supply pipes and flushing test for drainage pipes shall be performed.

Back fill and compaction of soil for underground piping shall be done carefully.

I.3 Electrical Work

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 Materials and equipment for electrical work and shop drawings shall be submitted to the
Engineer for approval.

Preparation for efficient wire or cable laying such as confirmation of the exact locations
where they are to be laid, cleaning the trenches or ducts, scraping/brushing inside of the duct
bank, pipes or conduits and so on shall be done.

All cable connections shall be made inside distribution board; pull box and outlet box etc.
and the connection shall never be exposed or inside of conduits.

Cable alignment, binding, fixing, wall penetration sealing, cable marking, and cable
penetration into conduits between cable trays, ducts and job-site junction boxes and similar
shall be made properly.

Adequate press-save coupling, wire connector or press combine terminal etc. will be used as
a principle for the connection of wires and/or cables.

In the case of line pipe exceeding 30m for one section or where leading in is difficult, pull
box shall be used.

Fixing method of distribution boards etc. shall be specified on the construction drawing, and
shall be fixed accordingly.

The position of lighting apparatus shall be indicated on ceiling allotted sketch in advance,
taking balance with other facilities apparatus.

Fixing height of switch and socket outlet shall be shown on the shop drawing securing the
approval of the consultant and shall be fixed accordingly.

J. TESTING AND TRIAL RUN

After installation of Mechanical and Electrical equipment, test and inspection including their record
reports will be done. Trial operation shall be proceeded to adjust and check the function of
equipment.

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