METHOD STATEMENT FOR APPLICATION OF LIQUID BITUMINOUS DAMP PROOFING AT SUB-STRUCTURE

 1.0       SCOPE

The intension of this method statement is to describe the procedure and responsibilities of its person which are application of liquid bituminous dam proofing on sub-structure.

 

2.0              RESPONSIBILITY

2.1              Project Manager is overall responsible for all aspects of the works / project.

 

2.2              The Project Site Engineers are responsible for proper execution, arrangement, co-ordination & supervision for the quality, safety & delivery of work.

 

2.3              Anti-termite subcontractor is the responsible to ensure the delivered chemical are as per approved materials and it is responsible for proper mixing and application at site.

 

2.4              The QA/QC Manager & Engineers shall ensure that execution team is following this method statement & implementing the site inspection procedures. The QA/QC Engineers shall monitor, check, control & document the quality of concrete delivered to site, & the quality of  work during the entire duration of casting.

 

2.5              Safety Engineer or Safety Officer will ensure the implementation of safety at work site.

 

3.0              MATERIALS & EQUIPMENT 

3.1              Approved Bituminous Damp proofing Materials.

3.2              Roller paint

3.3              Recommended Polyethylene 1000 gauge thick.

3.4              Compressor in required

3.5              Broom or brush

 

4.0              EXECUTION 

4.1              Substrate or concrete blinding should be examine with applicator present and Engineers, for compliance with all requirements surface smoothness and other condition affecting of work.

  

5.0              PREPARATION

5.1              Surface preparation of blinding, fill voids, seal joints, cracks and apply bond breakers if required, as recommended by system Manufacture. 

5.2              Mask or otherwise protect adjoining exposed surfaces from being stained, spotted or coated with water proofing materials. Prevent water proofing materials from entering and clogging weep holes and drains.

5.3              Applicator of Liquid Damp proof shall be approved or certified by manufactures

 

6.0              application

6.1              Application, General

Comply with Manufacture written recommendation unless more stringent requirements are indicated or required  by protect conditions to ensure satisfactory performance the system

6.1.1        Apply additional coat if recommend by manufacture or required to achieve coverage indicated.

6.1.2        Apply second coat at right angle direction to first coat.

6.1.3        Allow each coat of waterproofing to cure, before applying subsequent coats.

6.2       Application for Sub-structure.            

6.2.1    Ensure that concrete surface is clean, smooth and dry.

6.2.2    Ensure that prior to application of waterproofing all services penetration are completely in place and inspected by Engineers.

6.2.3    Apply the liquid Damp proof materials continuously on the blinding surface  area with one Layer and let dry or cure in as per manufacture recommendation prior to continue the subsequent layer. 

6.2.4    Application or termination on MEP embedment shall be as per approved detail drawing which is recommended by sub-contractor.

6.2.5    When application of damp proof is finish, engineers should be inspected and approved the application prior to installation of approved polyethelyne sheet.

6.2.6    Support protection course with spot application of trowel-grade mastic.

 

7.0              FIELD QUALITY CONTROL 

7.1              Monitor the materials delivery and application of materials.

7.2              Application of Damp proof should inspect and approved by Engineers prior screed.

 

8.0              SAFETY PRECAUTION

8.1              Prime importance shall be given to safety of personnel and protection utility Service. It ensures that the personnel involved are thoroughly aware of the company Safety regulation.

8.2              Any Machineries and Equipment must operate only by well trained and experienced personnel.

8.3              Protective clothing and equipment will be necessary and will ensure that any special protective clothing or equipment required and any signs relating to the wearing of helmets, eye protection, ear defenders, visibility vest etc., are ordered and available for use on site and that subcontractors are made aware of any site requirements, especially for the wearing of safety helmets.

8.4              Instruct staff in the correct application of hazard chemicals which could cause injuries to the hands.

8.5              Risk assessment letter should issue by Safety In-charge before start of activity and immediately post at the working area during activity.

  

9.0          Reference Documents

  9.1   Project contract specifications

       9.2   Project contract drawings general Notes   

METHOD STATEMENT FOR CONCRETE BLINDING AT SUB-STRUCTURES

1.0 SCOPE

This method statement describes the work procedures, quality assurance, and quality control for the concrete blinding at sub-structures.

2.0 RESPONSIBILITY

The Project Manager is overall responsible for all aspects of the works/project.

The Project Site Engineers are responsible for the proper execution, arrangement, coordination, and supervision of the quality, safety, and delivery of work.

The QA/QC Manager/Engineer shall ensure that the execution team follows this method statement and implements the site inspection procedures.

The MEP Coordinator/Engineers are responsible for coordinating the Mechanical and Electrical works related to underground works.

The Safety Engineer will ensure the implementation of safety on the worksite.

The Approved Ready Mix Concrete Supplier is responsible for the continuous delivery of concrete as per the approved design mix and project specifications, from batching and transporting to controlling the temperature and slump tests, as well as taking the required concrete test cube samples upon arrival on-site.

3.0 MATERIALS & EQUIPMENT

Blinding Concrete: Ready-Mixed, as per the approved design mix by Engineers/Consultants.

Mobile Concrete Pump

Mobile Tower Crane (If required)

Bonding Agent (if required)

Approved Gauge Polyethylene Sheets

Clean/ Potable Water

Power-Driven Floats

Wooden/ Aluminum Screeder Bar

Dumpy Level with Stadia Rod

Air Compressor

4.0 WORK PROCEDURES

Preparation Works

Excavation works up to the formation level of the sub-structures should be completed and checked for required elevations by Engineers and the approved Independent Testing Agency to ensure bearing stability.

For normal excavation of undisturbed earth, the cut earth surface at the formation level should follow the standard method statement for soil backfilling.

Establish the reference 1.0m elevation from SSL and the high-level elevation of the concrete surface for blinding, with a minimum requirement of 75mm. Shuttering should be provided around the perimeter ends of the proposed casting area.

Approved soil treatment/anti-termite must be applied prior to laying polyethylene sheets on the soil surface.

Install the approved polyethylene sheet on top of the soil surface, as per the installation procedure by the manufacturer or supplier.

Concreting Works

Blinding concrete shall be poured on the prepared area using a concrete pump for large volumes, or direct pouring with a chute, following the basic method statement for placing concrete using a mobile pump or direct pouring.

In case of delays in the concrete, the incomplete poured strip should be treated with bonding agent and/or cement slurry before placing fresh concrete.

When the ready-mix concrete is placed or poured on the area, level the concrete according to the approved blinding level.

The surface finish of the blinding shall be smooth, using power-driven floats to achieve the required surface finish for receiving waterproofing membranes.

Curing & Protection

During concreting and throughout the initial hardening, the blinding shall be immediately cured with an approved curing compound or water curing.

The work area shall be closed off from traffic during preparation, concreting, and curing.

Slump Test & Temperature Control

Slump tests and temperature checks of the concrete will be carried out for every truck mixer that arrives on-site. Results will be recorded in the delivery ticket and the concrete monitoring log prior to placement at the site. The slump test and temperature will follow the approved design by Engineers.

Concrete Test Cubes Sampling

The frequency of sampling concrete cubes shall be as per the instructions of the Engineers/Consultants or according to standard specifications. Concrete sampling shall be carried out in accordance with Clause of BS 1881 Part 102.

5.0 FIELD QUALITY CONTROL & INSPECTIONS

The necessary site inspections, as stated in the work procedures, shall be carried out in accordance with the site inspection procedures.

Site Engineers and Project Engineers will monitor the execution of work to ensure compliance with this method statement.

Upon completion, a joint quality inspection between the Contractor, QC Engineer/Project Engineer, and the Consultant’s Engineer shall be carried out to verify the quality of the finished surface of the blinding. Any unsatisfactory workmanship or defects found shall be rectified, and preventive actions shall be taken to avoid recurrence in subsequent works.

6.0 SAFETY PRECAUTIONS

Prime importance shall be given to the safety of personnel and protection of utility services. Ensure that personnel involved are thoroughly aware of the company’s safety regulations.

Any machinery and equipment must only be operated by well-trained and experienced personnel.

Protective clothing and equipment will be necessary. Ensure that any special clothing or equipment required (including signs relating to the wearing of rubber boots, helmets, eye protection, ear defenders, visibility vests, etc.) is ordered and available for use on-site. Ensure that subcontractors are made aware of any site requirements, especially regarding the wearing of safety helmets. Instruct staff in the correct handling and lifting of materials, especially those that could cause injury to the hands.

A risk assessment letter should be issued by the Safety In-charge before the start of the activity, and it should be posted immediately at the working area during the activity.

7.0 REFERENCE DOCUMENTS

Project contract specifications

Project contract and Approved Shop Drawings

 

METHOD STATEMENT FOR CONCRETING OF PROTECTION SCREED

1.0 SCOPE
The intention of this method statement is to describe the procedure and responsibilities of the personnel involved in the concrete pouring for the protection screed.

2.0 RESPONSIBILITY

The Project Manager is overall responsible for all aspects of the work/project.

The Project Site Engineers are responsible for the proper execution, arrangement, coordination, and supervision of quality, safety, and delivery of the work.

The Approved Concrete Ready Mix Supplier is responsible for the continuous delivery of concrete as per the approved design mix and project specifications, from batching to transporting, controlling temperature and slump, and taking required concrete test cube samples upon arrival at the site.

The QA/QC Manager & Engineers shall ensure that the execution team follows this method statement and implements the site inspection procedures. The QA/QC Engineers shall monitor, check, control, and document the quality of concrete delivered to the site and the quality of work throughout the entire casting process.

The Safety Engineer or Safety Officer will ensure the implementation of safety measures at the worksite.

3.0 MATERIALS & EQUIPMENT

The concrete design mix for the protection screed should be approved by the engineers before execution.

Polyethylene sheets should be approved by the engineers or as recommended by the waterproofing manufacturer/supplier.

Secured approved shop drawings for raft foundation lift pits, manholes, etc., should be available for reference of screed levels.

4.0 EXECUTION

Inspection of completed layers of liquid damp proofing materials should be carried out to ensure no damage or unsatisfactory workmanship.

Install the approved gauge of polyethylene sheets as per the method statement of the waterproofing manufacturer/supplier.

Proceed with concreting the protection screed to the required thickness (minimum 50 mm) after rectifying any unsatisfactory conditions.

5.0 PREPARATION

Clean and prepare the applied bituminous damp-proof surface according to the manufacturer/supplier's recommendations on blinding.

Remove all dirt, deleterious materials, and other substances that may damage the waterproofing during the concrete pouring process.

Establish the reference elevation of 1.0 meter from SSL and the high-level elevation of the concrete protection screed as per the approved shop drawing and specification.

Install approved polyethylene sheets on top of the applied damp-proofing, as per the manufacturer's/supplier's method statement.

Install the forms along the construction joints of the protection screed.

Obtain approval from the engineers before the application or placement of concrete.

6.0 APPLICATION

Determine the weather conditions (hot, sandstorm, rainy, or sunny) before placing the concrete order with the ready-mix supplier.

Sprinkle clean water on top of the polyethylene sheet to promote bonding with the concrete.

When the ready-mix concrete arrives, inform the engineers and conduct QC testing, such as slump test, temperature check, and volume at the concrete checkpoint.

Use high slump or self-compacting ready-mix concrete to avoid using a vibrator, which could cause misalignment of the polyethylene sheet.

Place the ready-mix concrete using a concrete mobile pump or direct pouring with a chute, following the basic method statement for placing concrete using a concrete mobile pump or direct pouring.

Once the ready-mix concrete is placed, level the concrete according to the approved screed level.

Finish the screed surface as required, according to the specification or as approved by the engineers.

Once the initial set of the concrete is complete, immediately apply an approved curing compound or use water curing to prevent thermal cracking.

7.0 FIELD QUALITY CONTROL

Monitor the temperature and slump of ready-mix concrete.

Ensure the quality of the delivered ready-mix concrete at the site.

Ensure that concrete cube sampling is conducted as per the specifications.

Ensure quality workmanship and required thickness during the pouring activity.

8.0 SAFETY PRECAUTIONS

Prime importance shall be given to the safety of personnel and the protection of utility services. Ensure that personnel involved are thoroughly aware of the company’s safety regulations.

Any machinery and equipment must be operated only by well-trained and experienced personnel.

Protective clothing and equipment will be necessary. Ensure that any special protective clothing or equipment required, such as helmets, eye protection, ear defenders, visibility vests, etc., is ordered and available for use on-site. Subcontractors should be made aware of any site requirements, especially regarding safety helmets.

Instruct staff in the correct handling and lifting of materials, as improper handling could cause injuries to the hands.

A risk assessment letter should be issued by the Safety In-charge before the start of the activity and posted at the working area during the activity.

9.0 REFERENCE DOCUMENTS

Project contract specifications

Project contract drawings and general notes

 

METHOD STATEMENT FOR APPLICATION OF ANTI- TERMITE TREATMENT AT SOIL

SCOPE
The intention of this method statement is to describe the procedure and responsibilities of personnel involved in the application of anti-termite treatment on the sub-base of the structure.

2.0 RESPONSIBILITY

The Project Manager is overall responsible for all aspects of the work/project.

The Project Site Engineers are responsible for the proper execution, arrangement, coordination, and supervision of quality, safety, and delivery of work.

The Anti-termite subcontractor is responsible for ensuring that the delivered chemicals are as per the approved materials. They are also responsible for the proper mixing and application of the chemicals on site.

The QA/QC Manager & Engineers shall ensure that the execution team follows this method statement and implements the site inspection procedures. The QA/QC Engineers shall monitor, check, control, and document the quality of work during the entire duration of the treatment.

The Safety Engineer or Safety Officer will ensure the implementation of safety measures at the worksite.

3.0 MATERIALS & EQUIPMENT

Approved Anti-termite Materials
Clean Water and Water Pumps
Polyethylene Sheets and Water Drums
Mixing Equipment (if necessary)

4.0 EXECUTION

The soil substrate should be approved by engineers and the invert elevation should match the shop drawings.

All materials/chemicals should be inspected and approved by engineers.

The Anti-termite applicator should be approved or certified by local authorities.

5.0 PREPARATION

The soil surface should be properly compacted (if necessary), and all loose materials should be removed.

The work should be coordinated with the Safety Department before proceeding with the activity.

Mixing of materials should be done as per the applicator/manufacturer’s recommendation.

6.0 APPLICATION

Internal Area

Footings – The excavated area of footings will be treated by spraying termiticidal solution on the exposed soil surface prior to concreting.

Foundation Walls – The adjacent soil surface along the perimeter of foundation walls and both sides of interior partition walls will be treated by spraying termiticidal solution as necessary.

Slab – The soil surface adjacent to building slabs and attached slabs will be treated by spraying termiticidal solution prior to concreting.

Penetrations and Joints – Expansion joints, control joints, and areas where slabs will be penetrated (e.g., around plumbing pipes, electrical/telephone conduits) will be treated by spraying termiticidal solution on the soil surface as necessary.

Ground Floor – The ground floor level will be treated after compaction by spraying termiticidal solution on the soil surface prior to the floor slab concrete works.

External Area

The soil around the building at the foundation/perimeter level will be treated as per the manufacturer's recommendation before fixing the interlock tiles or concrete works.

Special Note: Any structural changes in treated areas disturbed by construction activities, such as breaking concrete slabs, digging trenches or pits, re-filling, or leveling, should be reported to the applicator contractor for re-treatment to restore the chemical barrier.

If the treated area is exposed to ultraviolet rays or heat for more than 24 hours in summer and 48 hours in winter, and is not protected by polyethylene sheets due to delays in concreting works, it is advised to re-treat before proceeding with concreting.

7.0 FIELD QUALITY CONTROL

Monitor the delivery of materials, temperature, mixing at site, and application.
The application of anti-termite treatment should be inspected and approved by engineers.

8.0 SAFETY PRECAUTIONS

The prime importance shall be given to the safety of personnel and the protection of utility services. Personnel involved should be thoroughly aware of the company’s safety regulations.

Any machinery and equipment must be operated only by well-trained and experienced personnel.

Protective clothing and equipment will be necessary. Ensure that any special protective clothing or equipment required (such as helmets, eye protection, ear defenders, visibility vests, etc.) is ordered and available for use on-site. Subcontractors should also be made aware of any site-specific requirements.

Instruct staff on the correct application of hazardous chemicals that could cause injuries to the hands.

A risk assessment letter should be issued by the Safety In-charge before the start of the activity and should be posted at the working area during the activity.

9.0 REFERENCE DOCUMENTS

Project contract specifications
Project contract drawings and general notes

 

METHOD STATEMENT FOR EXCAVATION OF FOOTING/FOUNDATION

	Name	Signature	Position	Date
Prepared by:	Quality Department		QAQC Engr.
Reviewed By:	Construction Team		CM
Approved By:	Project Manager		PM

History

Rev	Date	Change Description
0	25-June-2021	First issue for approval

 

1.0       SCOPE

 

The intension of this method statement is to identify, establish and describe the different works to be undertaken in conformity with the specified requirements for Earthworks related activities consistent with the approved drawing s and relevant specification.

 

1.0.1.      Excavation of soil from existing ground level Elev. 0 to  a minimum 1.3 to 1.6 m depth maximum, as per BOQ, and approved shop Drawing.

1.0.2.      Mass Excavation for rocks and hard soil as per Engineers/ Consultant instruction and approval.

 

 

2.0              RESPONSIBILITY

 

2.1              Project Manager is overall responsible for all aspects of the works / project.

 

2.2              The Project Site Engineers are responsible for proper execution, arrangement, co-ordination & supervision for the quality, safety & delivery of work.

 

 

2.3              The QA/QC Manager & Engineers shall ensure that execution team is following this method statement & implementing the site inspection procedures. The QA/QC Engineers shall monitor, check, control & document the quality of concrete delivered to site, & the quality of work during the entire duration of casting.

 

2.4              MEP Coordinator / Engineers is the responsible for coordination of Mechanical and Electrical works with relevant on underground works.

 

2.5              Safety Engineer or Safety Officer will ensure the implementation of safety at work site.

 

 

3.0              MATERIALS & EQUIPMENT

 

3.1              Excavators / Backhoes / Breakers.

3.2              Wheel Loaders / Shovels

3.3              Bulldozer

3.4              Dump Trucks / Trailer

3.5              Bobcat / JVC

 

4.0              EXECUTION

 

4.1              Setting-out surveys and as well as leveling surveys shall be approved and inspected by Client representative and approved by 3^rd party surveyor which is approved and qualified by local government. 

4.2              Benchmark / Control points shall also established by 3^rd party surveyor on site at suitable location. Benchmarks shall be marked with its co-ordinates and elevation and the same transposed to a sketch / drawing for records.

4.3              All setting out and leveling works shall be carried out in accordance with approved drawings.

4.4              All ground investigation shall carry out and approved by Client prior to proceed of excavation.

 

 

5.0              PREPARATION

 

The site area to be excavated will be thoroughly inspected and any necessary preparation in conformity with the project specification.

 

5.1              Protect structures, utilities, sidewalks, pavements, lateral movement, undermining, washout, and others hazards created by earthworks operation.

5.2              Protect sub grades and foundation soils against freezing temperatures or frost. Provide protective insulating materials as necessary.

5.3              Provide erosion-control measures if necessary to prevent erosion or displacement of soils and discharge of soil bearing water run-off or airborne dust to adjacent properties and walkways.

 

6.0              EXCAVATION

 

6.1              Preliminary setting out be done by surveyor using chalk powder or paint on the ground using benchmarks/ control points. Due allowance for working space and stability of the sides shall be consider during this marking by extending the excavation face from the structure line.

6.2              An official inspection shall be issued to Engineers for markings on the ground prior to commencing the excavation works.

6.3              Excavation shall be carried out using equipment listed earlier in this section.

6.4              All equipment shall be fitted with reverse alarms and wheel loaders with flashing beacon.

6.5              The Foreman or Supervisor for excavation shall maintain a watch on the excavation and assist the surveyors, engineer and other trade contractor who will be giving the levels to the operators as indicated on the approved shop drawings.

6.6              During Excavation vertical cuts may be made if the surface countered is rocky. However, all loose pockets shall be removed to avoid any collapse.

6.7              Unsuitable/ deleterious materials shall be carted away from site using tipper trucks to location designated by the municipality.

6.8              All excavation shall be done to elevation indicated within a tolerance of plus / minus 25 mm.

 

 

7.0              MATERIALS HANDLING AND STORAGE

 

7.1              Temporary storage at site in an orderly manner as not to hinder any other on-going works, including dust control in stockpiles as necessary.

 

8.0              FIELD QUALITY CONTROL

 

8.1              Work shall comply with all rules, regulation, law and ordinance of all authorities having jurisdiction.

8.2              All Inspection will be carried out in phases to cover a part of the total work.

8.3              Ensure Quality control of works will be monitored by supervisor in ensuring compliance with this document.

 

9.0              SAFETY PRECAUTION

 

9.1              Prime importance shall be given to safety of personnel and protection utility Service. It ensures that the personnel involved are thoroughly aware of the company Safety regulation.

9.2              Any Machineries and Equipment must operate only by well trained, experienced and license personnel.

9.3              Protective clothing and equipment will be necessary and will ensure that any special protective clothing or equipment required and any signs relating to the wearing of helmets, eye protection, ear defenders, visibility vest etc., are ordered and available for use on site and that subcontractors are made aware of any site requirements, especially for the wearing of safety helmets.

9.4              Instruct staff in the correct handling and lifting of materials as required for the handling of materials which could cause injuries to the hands.

9.5              Risk assessment letter should issue by Safety In-charge before start of activity and immediately post at the working area during activity.

 

 

10.0          Reference Documents

 

10.1          Project contract specifications

10.2          Project contract drawings or Approved shop drawing by Civil/Structural and MEP.