Columns and walls method statement.
Index
Scope of Work
Personnel Responsibilities
Safety Arrangements
Training
Project Specific Details
Scope of Works.
The purpose of this Method of Statement for reinforced
concrete column, wall and vertical elements cast in site 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 main contractor to ensure work activities are carried out in accordance with
the method statement. Any irregularities shall be immediately action.
This method statement describes the working procedures for
reinforced concrete column, wall and vertical elements cast in site and all
related activities. This will include surface preparation, application, testing,
and post application.
General.
Prior to works
commencing, the Site Engineer shall ensure that the following activities have been
completed and signed-off by the Consultant:
Drawing must be approved for construction by the Consultant.
Material submitter for reinforcement steel bar, spacer and
concrete mix design is approved by Consultant.
The Site Engineer
shall ensure that the necessary Statutory Authorities approvals have been
received.
Reference.
Approved drawings for construction.
Project specification Section.
Approved Design Mix for Concrete.
Approve project quality &
safety plan.
Approved Inspection of preliminary
work (blinding concrete, waterproofing works if required).
Preparation.
Surveyor will set out the area to which the form-works will
be places based on approved drawings for the relevant pour.
Suitable platform
will be installed next to the reinforced concrete retaining wall for ease of
erection of the form-work, rebar installation and the subsequent concrete works.
Platform should have
suitable access and other safety implements, i.e. guard rails, toe boards, knee
boards etc., to ensure safe system work.
Prior to splicing
vertical bars, ensure that construction joint (where they occur) is free from
laitance and prepared to provide mechanical bonding.
Ensure that the
starter bars have adequate splice length and have not deteriorated.
Reinforcement.
Rebar will be
installed by a combination of manual handling and lifting equipment, held
together by binding wires, and based on the approved drawing taking cognizance
of splice length, structural opening, cast in items, concrete covers etc.
Wall mats maybe
fabricated on site or may be tied in site.
Check the latest
drawing and schedule are available on site and workplace.
Ensure that the
reinforcement is installed in accordance with approved design and bar schedule.
Where required, MEP
embedded services will be fixed in required level and location as per approved MEP drawings.
All embedded items
(for succeeding activities) shall be fixed properly.
Cleaning of the area
shall be done regularly by air compressor and hand tools prior to form work closure.
The Site Engineer
shall ensure that MEP clearance has been received and signed by MEP Engineers.
Form-works
Ensure that all types
of form-work to be utilized including releasing agents had been obtained the
approval from Engineer / Consultant before proceeding.
Handle and store
materials separately in such manner as to prevent intrusion of foreign matter
or deterioration.
Form materials shall
be new. Materials may be reused during progress of work, provided they are
completely cleaned, reconditioned, re-coated for each reuse and capable of
producing form-work of required quality.
Form-works shall
conform the shape, lines, grade and dimension of concrete as required by the
drawings and shall be constructed in accordance with approved proposals.
Ensure that the
approval shutter release agent material is used to the shutter internal sides.
Fabricated forms for
easy removal without hammering or prying against concrete surface.
Ensure that all MEP
embedded items and other items for any succeeding activities are correctly
fixed.
Ensure MEP clearance
has been approved.
Ensure the shutter
true plumb and alignment. Check the approve shop drawing layout for accuracy.
Ensure that there is
a safe and clean platform for access prior to concrete casting commencement.
Ensure that all
shutter designer recommendations (concerning casting rate and methodology etc.)
shall be followed.
Ensure that the
shutter is as per approved shop drawing.
No concrete shall be placed in forms until form-works,
reinforcement, embedment and all other aspects of the works performed herein
have been examined and certified by the Engineer / Consultant.
Placing Concrete.
Ensure a “concrete pouring permit / inspection request &
clearance” has been signed-off by all parties involve.
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 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 and temperature shall be checked
randomly or at the discretion of the Engineer / Consultant.
All surplus waste
concrete shall be cleared away.
Pouring concrete will
be carried out using crane with concrete bucket or mobile pumps.
The concrete shall be
vibrated. Spare vibrators shall be kept in case of emergency.
Concrete shall not be
free dropped more than 1.50 meters.
Concrete casting will
proceed as to avoid any vertical or horizontal cold joints between layers.
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.
Ensuring continuous
supply of concrete by proper coordination during casting to avoid any technical
complications like cold joints, bleeding, and segregation.
The curing process
will continue for 7 days. The concrete surface will be wetted during this
period otherwise with use of curing compound.
Concrete cubes will
be sent to the third-party testing authority for testing at 7 & 28 days and
durability test.
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.
Concrete Sampling & Testing.
Slump of concrete will be done
randomly or at discretion of Engineer.
Temperature will be monitored and
recorded.
Cubes will be taken as per Project
Specification Sec. 033000 Cast in Place Concrete.
For every 25 m3 delivered 1 set of 4 cubes to
be taken for compressive strength test, 1 cube for 7 days, 2 cubes for 28 days
and 1 cube spare.
Testing cubes will be done n
approved third party laboratory
The slump, temperature of arriving
concrete and cubes will be taken by supplier technician.
The cubes will be kept in
containers protected from direct atmosphere and in accordance with British
Standard.
Concrete poured record to be
submitted to Engineer daily.
Dismantling.
Removal and striking of form-works
shall be carried after 24 hours of casting and shall be performed carefully
under competent direction to ensure that the concrete surface will not be
damage.
All safety precautions shall be
maintained during shutter dismantling process.
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:
To be provided.
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:
Transit Mixer
Concrete Pump / Concrete Bucket
Concrete vibrator
Note: All machinery need to be third-party certified, will
be daily checked, maintained and refuel. Operators must be licensed and well
trained. Both machines and operators will be constantly checked by competent
person during operation. Demonstration will be conducted as per the requirement
of the Engineer.
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