What is the minimum Propping Period of Beams and Slabs of various Spans?

Harikiran N

Junior Member
With respect to IS456
In the normal condition, formwork shall be removed
1) For slab props left under 3 days, it is usually removed after 12 to 24 hours.
2) For sides of beam formwork shall be removed after 24 hours.
3) For vertical member, it shall be removed 24 to 48 hours as may be decided by the engineer in charge.
4)Beam soffits (props left under)7 days
5)Removal of props to slabs (Spanning upto 4.5 m)-7 days
6)Removal of props to slabs (Spanning over 4.5 m)-14 days
7)Removal of props to beams and arches (Spanning upto 6 m)-14 days
8)Removal of props to beams and arches (Spanning over 6 m)-21 days