Jul 30, 2021

Formwork/ Shuttering- Standard Operating Procedures

FORMWORK
Introduction:

This standard operating procedure enumerates the scope of Formwork to be executed in Tower area as specified in the approved drawings and at places when instructed by the Tower-in-charge.


Responsibility:

The respective Tower-in-charge is responsible to execute the work as per procedure.

Safety & protection:

PPEs like safety belts at height, helmets, safety goggles, ear plugs, hand gloves and safety shoes etc. should be used properly. 
Ensure the working area is kept clean for easy access and formwork materials are being stacked correctly.

Proper illumination to be provided during the work, if required.

Educate the workmen through pep-talk meeting. 
 
Preparatory works:

Contractor should submit a Formwork Scheme Drawings for the formwork system which he is going to use at site.

Do calculate total required materials for formwork as per scheme drawing and ensure the availability at site to achieve a cycle time.

Keep 3mm sponge sheet in stock for making old concrete to shutter joint. 

Formwork should be free from damages and holes on it. Do not use damaged shutters; it can be use only after doing correct repairs to the satisfaction level of Tower-in-charge.

In Case of holes on shutter, it should be sealed with PVC plug cap.

Do clean and oil shutters before fixing them in place.

Do not allow contractor to cut the shutters at working area, to prevent saw dust in formwork.

In Load Carrying props ensure Minimum 12mm dia pin is being used.


Work Method:
 
For Columns:

Ensure starters of minimum 6 inches are casted.

Reinforcement is clean and free from mud, oil, mortar droppings, loose rust, paint, oil, grease or other deleterious matter
Before fixing shutters to column, reinforcement should be checked by Tower-in-charge. 

Do use 3mm sponge sheet to seal gap between old concrete and shutter joint by applying it around concreted faces of column and then fix shutter over it.

Fix shutters to column as per scheme drawing.

Check formwork for its Cross sectional size and diagonals.

Check the Plumb of erected formwork.

Do check spacing of formwork primary and secondary member is as per scheme drawing.


For Slabs and Beams:

Ensure column concrete top is below or at beam bottom level.

Do fix shutters as per formwork scheme drawing.

Ensure there should not be any gap between adjacent shutters, in case there is gap it should sealed correctly by fixing rib inside and covering it from top with masking tape.

Ensure all Load Carrying props are in plumb and in line. In case of missing pin do not use pin of less than 12mm dia.

Additional prop should be fixed at the joint of shutter at beam bottom.

In case of Acrow spans are being used, they should be overlapped by minimum 2 feet. 

Slab and Beam bottom levels should be checked prior to fixing reinforcement on it.

Do check plumb of column caps and beam sides.

Do check alignment of formwork as per drawing.


Dos and Do not’s:

Do’s:

Do clean and oil shutter before fixing it in place.

Do plug the holes on shutter with PVC caps if any.

Use sponge sheet to seal gaps at joint.

Do fix all load carrying props in plumb.


Do nots:

Do not allow oiling on shutter once reinforcement activity is started.

Do not allow use of damage shutter without repairing.



Team
CBEC India

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