Method of Statement template for Suspended Slab
In this article we will give you template for suspended slab method statement can use to any construction project site.
Index.
Scope of work
Personnel Responsibilities
Safety Arrangements
Training
Project Specific Details
Scope of Works
The purpose of this
Method of Statement for suspended slab is to outline the materials and labor
required to undertake the works in a safe and controlled manner, compiling with
relevant legislation, standards, and codes of practice etc.
The method statement
shall be briefed to all appropriate operatives to ensure that they are aware of
the sequence of activities and any Client/Consultant project specific requirements.
A constant monitoring
and supervision duty shall be undertaken by contractor to ensure work activities are
carried out in accordance with the method statement. Any irregularities shall
be immediately actioned.
This method statement describes the working procedures for suspended slab and all related activities.
This will include form-work, steel reinforcement work, scaffolding, propping /
back propping, concreting works and removal of forms, props, scaffolding &
support.
General
Prior to works commencing, the Site Engineer shall ensure that the following activities have been completed and signed-off by the Consultant:
All suspended slab must be approved by Municipality prior to casting.
Drawing must be approved for construction by the Consultant.
Concrete dimension drawing must be approved by Consultant.
Steel Reinforcement drawing must be approved by Consultant.
MEP Drawing & MEP Clearance must be approved.
The concrete design mix has been approved by the consultant.
The trial mix report has been approved by the consultant.
The Site Engineer shall ensure that the necessary Statutory Authorities approvals have been received.
Scaffolding / Form-work
Ensure that the scaffolding/form-work to be used is fit for purpose. Inspect the scaffolding for damage. Any items deemed to be damages shall not be used.
Submit scaffolding / form-work layout drawings and details to be approved by authorities / consultant.
Do not start the erection of scaffolding / form-work until approval to proceed has been received from the appropriate authorities.
Ensure that the scaffolding/form-works Supervisor has relevant documentation to allow him to supervise and check the works.
Manufacturer’s recommendation data, method of statement, specification, associated drawings and information concerning the sequencing, timing, checking, loading, striking, movement, lifting and stripping of temporary works and the design, supply and erection of any temporary working platforms for erection and dismantling purposes.
Upon installation of the scaffolding/form-work, obtain a “Certificate of compliance” that the form-works system was erected as per approved drawings and design aspects, and that it has been checked by their authorized representative.
Back Propping.
Ensure that the back propping has been installed in accordance with all relevant specification, method of statement, drawings etc.
Review the project specification to ensure that the back propping has been undertaken correctly.
Steel
Reinforcement.
The Site Engineer shall check that the reinforcement is as per the specification.
The Site Engineer shall ensure that the cut and bent reinforcement is as per the approved shop drawings. All concrete reinforcement shall be detailed, fabricated, labelled, supported, and spaced in the forms and secured in place in accordance with the project procedures requirements of the project specifications.
All reinforcement shall be free of rust.
The Site Engineer shall check the levels, fixings and bracing for the chairs to ensure that the slab level and safe working loads for top layers is not exceeded.
MEP embedded services will be fixed and levelled/sloped as per the approved MEP drawings (drainage pipes, floor drains, earthling rods etc).
The contractor Surveyor shall inspect the top reinforcement levels regularly during the fixing process to ensure the slab level is correct.
The contractor Surveyor shall mark the locations of all vertical structural elements (columns, walls and core walls).
One stirrup or reinforcement bar will be fixed at the exact location of the vertical member’s location. This will be tied securely with the top reinforcement.
Starter bar shall match the starter bar approved shop drawing.
A comprehensive check shall be made by the Site Engineer to ensure that the reinforcement works for the slabs are as per the approved shop drawings (number of bars, spacing’s, lap length, reinforcement for concrete kicker of core walls, and retaining walls etc).
Cleaning of the area shall be done regularly by air compressor and hand tools during all working stages of the slab, in order to avoid the accumulation of excessive debris.
The Site Engineer shall ensure that MEP clearance has been received prior to submitting the inspection for suspended slab pouring.
Hy- Rib will be installed at construction joints, where specified in approved drawings (if any)
Concrete Pouring.
The Site Engineer shall ensure that all required authority approvals have been received prior to concrete pouring.
Sufficient lighting will be provided during the night casting process.
The required number of concrete test cubes shall be taken. These shall be individually marked and passed to the checkpoint.
Concrete temperature shall not exceed 32 degrees centigrade during concrete pouring.
Concrete trucks will be checked by the QA/QC representative prior to delivery of concrete to ensure the mix is as per the approved design mix.
Concrete slump tests for each truck.
All surplus waste concrete shall be cleared away.
Pouring concrete will be carried out using mobile pumps / concrete bucket.
The concrete shall be vibrated. Spare vibrators shall be kept in case of emergency.
Fresh concrete shall not be permitted to fall from a height of greater than 1.50 meters without the use of adjustable length pipes or elephant trunks.
The surface level of concrete shall be marked by pegs or tape over exposed reinforcement bars.
The Site Engineer shall ensure that the top surface is level and does not exceed the required depth.
Ensuring continuous supply of concrete by proper coordination during casting to avoid any technical complications like cold joints, bleeding and segregation.
The concrete finishing shall be undertaken using power float machines.
The concrete will be wetted with clean water and covered with polythene sheets. Approved materials for curing compound may be applied following the manufacturer’s recommendation and project specification.
In case those cold joints have been observe during pouring of concrete, the use of approved bonding agent between old and fresh concrete may applied with the approval of the Engineer.
Frequency of Concrete Sampling and Testing
Concrete slump tests shall be checked for every delivery and/or when so directed by the Engineer.
2. Water Permeability (DIN 1048).
Temperature will be monitored and recorded.
Sampling and testing shall be performed using the relevant procedures in ASTM C 31/C172 and C192, ASTM C143 and ASTM C 823 or corresponding BS.
Samples for production concrete cubes shall be taken at the point of placement at the average rate of one per 20 cu. m of concrete placed, with a minimum of one sample taken every day that the mix is used. A sample shall consist of four 150 mm cubes moulded and stored for laboratory-cured test specimens except when field-cured test specimens are required. One cube is for testing at 7 days after casting, three for testing at 28 days after casting, and one reserved for later testing if required. (For every 20 cu. meters delivered, 1 set of 5 cubes to be taken for compressive strength test, 1 cube for 7 days, 3 cubes for 28 days & 1 cube spare).
Testing of cubes will be carried out in approved laboratory.
The slump, temperature of arriving concrete and cube will be taken by concrete ready-mix supplier technician.
The cubes will be kept in containers protected from direct atmosphere and in accordance with ASTM or BS.
Concrete pour record to be submitted to engineer.
Durability Tests
2. Water Permeability (DIN 1048).
3. Rapid Chloride permeability (ASTM C1202).
4. Porosity RILEM CPC 1135. Chloride and Sulphate.
Dismantling the scaffold and propping structure.
Ensure that the program for removal of form-work is understood by all relevant parties.
Ensure that sufficient time has elapsed prior to the removal of form-works
Follow the specification requirement for the timing of removal of form-works as mentioned below
Vertical forms to column, walls and large beams. 24 hours
Soffit form-works to slab. 4 days
Props to slabs. 11 days
Soffit form-work to beams. 8 days
Props to beams. 15 days
Remove forms only if shores have been arranged to permit removal of forms without loosening or disturbing shores.
De-nail all form-work immediately upon striking.
Clean all form-works immediately upon de-nailing
Store re-usable form-work in suitable dry location
Ensure that any broken or unsuitable form-work is removed from site or used for other purposes on site.
Ensure that the concrete has reached its specified strength. Refer to the concrete cube test results.
Seek approvals from the Engineer for permission to dismantle scaffolding / propping.
Start the dismantle process from lower floors.
Removed from the area the dismantled props.
Whilst removing the props, undertake a survey of the remaining propped areas to ensure no cracks or sign of excessive loads or movement of slabs is taking place. (refer to the approved shop drawing & structural calculation.
Vertical forms to column, walls and large beams. 24 hours
Soffit form-works to slab. 4 days
Props to slabs. 11 days
Soffit form-work to beams. 8 days
Props to beams. 15 days
Remove forms only if shores have been arranged to permit removal of forms without loosening or disturbing shores.
De-nail all form-work immediately upon striking.
Clean all form-works immediately upon de-nailing
Store re-usable form-work in suitable dry location
Ensure that any broken or unsuitable form-work is removed from site or used for other purposes on site.
Ensure that the concrete has reached its specified strength. Refer to the concrete cube test results.
Seek approvals from the Engineer for permission to dismantle scaffolding / propping.
Start the dismantle process from lower floors.
Removed from the area the dismantled props.
Whilst removing the props, undertake a survey of the remaining propped areas to ensure no cracks or sign of excessive loads or movement of slabs is taking place. (refer to the approved shop drawing & structural calculation.
Personnel Responsibilities.
A full and detailed description of the roles and responsibilities of all ASGC staff is included within the Project Quality Plan. For the works as covered by this method statement, the following personnel have specific duties.
Technical Officer Engineer.
Specific responsibilities include:
Responsible for ensuring that the various submitting are timely undertaken (materials, method statements, workshop drawings, subcontractor’s issues, technical issues).
Responsible for quotations as required (materials, subcontractors).
Responsible for ensuring RFI’s are timely undertaken on behalf of contractor.
Responsible for the distribution of documents within contractor site personnel.
Site Engineer(s).
Specific responsibilities include:
Ensuring that the project is managed in a safe manner and meets the requirements of the project documentation.
Ensuring that subcontractors and suppliers achieve the on-site required standards.
Ensuring the Client is satisfied with our performance.
Ensuring performance measurable are delivered.
Shall refer to the QA/QC Department and the HSE Department for advice and guidance when required.
Shall ensure that operatives comply with the relevant method statements, Toolbox Talks and general site briefings.
HSE Site Representative(s).
Specific responsibilities include:
Assisting in the production of any health, safety and environmental documents.
Monitoring the implementation of health, safety and environmental requirements.
Undertaking audits and ensuring that corrective and preventive actions are taken where required.
Liaison with the senior site staff on health, safety, and environmental related matters.
QA/QC Site Representative(s).
specific dates/programmers.
Preparation of the ITP.
Ensuring that all required tests are performed and follow appropriate specifications etc.
Reviewing and ensuring that all shop drawings and material submitting are presented to the appropriate bodies with adequate supporting information.
Ensuring that materials are inspected when delivered to ensure they comply with the various specifications.
Maintaining a record of all QA/QC activities on site.
Controlling and ensuring all measuring and test equipment on site is properly calibrated.
Controlling all non-conforming products or workmanship and implementing the required preventive actions.
Ensuring that corrective and preventive actions are taken when required.
Ensuring that the required testing is undertaken by approved independent laboratories, and that all test results are reviewed.
Undertake audits to ensure conformance to agreed Standards, Legislation, and project specific requirements.
Ensuring that staffs are aware of their responsibilities in respect of quality issues.
Assisting and reporting to the QA/QC Manager as required.
Supervisor(s).
Specific responsibilities include:
To ensure that all operatives and appropriate subcontractors have been briefed as to the content of the method statement and the works.
To adequately control the works as required.
To ensure the works are undertaken in a safe manner.
To ensure all operatives are adequately training in their respective works.
Reporting any un-safe practices on site to the contractor site team.
Subcontractors.
Specific responsibilities include:
To undertake their works as specified.
To work in a safe manner.
To ensure all operatives are adequately training in their respective works.
Report any un-safe practices on site to the contractor site team.
Safety Arrangements.
The contractor Project Safety Plan shall be strictly enforced. All works shall be regularly monitored to ensure full compliance.
Contractor shall resource as appropriate the supervision of the works.
Permits - Where required, permits to work will be provided prior to commencement of works. Permits shall be issued by suitably trained and experienced HSE personnel only.
PPE - All required PPE shall be issued. Constant monitoring and supervision of the works shall always ensure that the appropriate PPE is worn by affected operatives.
Access and egress – Routine access and egress will always be provided for materials and operatives. Where emergency routes are required. These shall be determined and arranged, and instructions given prior to commencement of the works.
Contractor supervision shall ensure that all material deliveries are coordinated, and all vehicles are parked in a position where they present no additional risk to the public or people associated with this project. Where vehicles are offloaded from public areas, the activity shall be supervised, and a dedicated offloading/storage area shall be provided.
Plant - All plant associated with this activity shall be inspected prior to the works commencing and at regular periods during the works to ensure that all required certification is current and that the plant is maintained in a safe and suitably working manner.
Lighting – At all times, appropriate and suitable lighting shall be provided to ensure the works can be undertaken in a safe and competent manner.
Working at height – Where required, all appropriate measures shall be enforced to ensure that operatives are afforded a safe and proper platform from which to work. Materials will be stacked in a safe and secure manner.
Scaffolds shall be erected by competent operatives to an agreed design. Scaffolds shall be inspected before use and at regular periods thereafter.
Housekeeping – At all times, contractor supervision shall monitor the works to reduce as far as reasonably practical the storage of rubbish, waste materials and debris at the work face. All waste materials shall be removed from the workplace to a suitable area.
Training.
Contractor shall identify the needs for training and/or certification of personnel to ensure that suitable levels of proficiency are attained and maintained to meet the specified requirements of the project.
Contractor shall:
Determine the necessary competence for personnel performing work affecting its quality.
Provide training or take other actions as to satisfy those needs.
Evaluate the effectiveness of action taken.
Ensure that its personnel are aware of the relevance and importance of their activities and how they contribute to the achievement of the product.
All records shall be maintained.
Prior to these works commencing, a review of the activities shall be undertaken in association with the operatives undertaking the duties. This will identify where additional training over, and above existing knowledge or experience is required.
This Method Statement shall be communicated to appropriate personnel connected with the undertaking of these works. This is essential to the safe and successful completion of the operation. The method statement shall be signed every time the operatives are briefed.
Project Specific Details.
Project specification:
Project specification Section
Project specific Shop Drawings:
Project specific Material Approvals:
Project specific Manpower Task(s)/ Operation(s)/ Process(s)
Permits required for these works:
Working in heights
Plant and equipment required for these works:
The list of machinery that will be used are as follow:
Concrete pump,
Concrete trucks, Power float machines, Level Machine, Hand Tools for casting
and finishing, Cleaning Tools, Water and electrical supply.
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