WHEN TO REMOVE FORMWORK FOR DIFFERENT CONCRTE WORKS?

In normal circumstances (generally where temperature are above 200C), and where ordinary cement is use, forms may be struck after expiry of following periods:

Walls, columns and vertical sides of beams 24 to 48 hours as may be decided by the engineer in charge
Slabs (props left under) 3 days
Beam soffits (props left under) 7 days
Removal pr props to slabs(a)  Spanning upto 4.5 m

(b)  Spanning over 4.5 m

7 days

14 days

Removal of props to beams and arches(a)  Spanning upto 6 m

(b)  Spanning over 6 m

14 days

21 days

 

Concrete Formwork
Concrete Formwork

For rapid hardening cement 3/7 of the above period will be sufficient in all cases except vertical sides of slabs, beams and columns which should be retained for 24 hours.

Also Watch This Video on Increasing Repetition of Plywood

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