Below is a precise RCC work building construction method statement that covers Casting of Foundation, Neck column, Tie beam, Grade Slab, Columns, Core & shear walls, Beams & Suspended Slab according to specified drawings and quality standards.
The contractor’s approved shop drawing for RCC structural elements shall be available for inspection by the consultant engineer.
All shuttering and reinforcement is to be checked and approved by the consulting engineer.
Form work shall be of such quality and strength that shall ensure rigidity throughout placing, ramming, vibration and setting of concrete without visible deflection.
Joints in form work shall be closed properly and tightly secured against previously cast concrete to prevent bleeding of concrete paste.
Prior to the concrete pouring activities, inspection request will be raised for engineer’s approval.
The equipment to be used on site will include the following:
- Concrete Pump
- Vibrators
- Masonry Tools
- Cube Moulds
- Slump Cone
Roles and Responsibilities
The site engineer shall check that levels are as indicated on the drawings and are correct, in case of any kind of discrepancies or inaccuracies the contractor shall correct levels in consultation with the consultant/client.
Site engineer shall be deemed to have satisfied himself as to the shuttering and reinforcement works.
Project Manager shall be responsible for ensuring that all works are carried out strictly in accordance with this civil method statement, the requirements of the client and the overall contract documents.
Site safety in-charge is responsible to ensure that all the works are carried out strictly in accordance with safety norms and applicable health and safety procedures and risk assessment etc.
Project quality team shall ensure the best quality work including the preparation and testing of concrete cubes for compressive strength as specified.
The project engineer shall ensure curing as specified and utmost quality shall be maintained through the works.
Sequence of Work for RCC
Well before proposed start date for RCC works, Mix Design for all grades of concrete to be used in works shall be conducted in Field Laboratory as per approved Technical Specifications.
The Mix Design shall be conducted in the presence of consulting engineer.
RCC footing shall be done throughout the length and width of structure to be constructed and shall conform to specified shape, levels and grade providing firm foundation, level bed and strong structure.
Concrete shall not be freely dropped into place from a height exceeding 1.5m to avoid segregation of material.
Casting of structures shall be done by placement of shuttering in line and level followed by placing of reinforcement and subsequent concreting.
All these works shall be executed as per the procedures and norms already laid down herein above or as per the project specifications.
After completion of excavation & surface preparation, 10cm thick PCC shall be laid as per the approved drawings.
Location of Footing and column shall be marked according to the approved coordination drawings.
Vertical and horizontal steel reinforcement shall be cut and bent according to the drawings and tied by strips in steel yard and shall be fixed in position.
Corner bars in column and Tie beams shall be cranked for the entire length of the lap.
The concrete cover to reinforcements shall be as specified in the drawings.
Cover block for steel reinforcement will be provided according to specifications.
Shuttering sides shall be checked for vertical position and right angles with the help of plumb bob.
Inspection request shall be raised 24 hours before the time of concrete casting.
Concrete as per the approved mix design shall be pumped carefully, vibrated and finished.
After setting, the concrete shall be covered with polythene sheet and wet Hessian clothes as per specifications.
Curing of Concrete:
The exposed surface of fresh concrete will be covered with polythene sheets after finishing work are completed.
After final setting of concrete (8 to 12 hours after casting) the polythene will be removed and the concrete surfaces will be covered with wet hessian cloth and covered by polythene sheet.
Wetting of Hessian cloth will be continued for a period of seven days.
Once the side shutters are removed, the sides of concrete structure will also be cured in a similar manner.
Below tests as required will be conducted:
- Cube compressive strength of concrete
- Slump test for workability of concrete
- Temperature control test.
Shutter form work will be removed according to specified time.