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As per IS 456:2000, minimum period before striking form work for vertical surface of the columns
1. 1 days
2. 7 days
3. 14 days
4. 28 days

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Correct Answer - Option 1 : 1 days


As per Clause 11.3.1 of IS:456-2000

Type of Formwork

Minimum Period Before Striking Formwork

Vertical formwork to columns, walls, beams.

16 - 24 h (1 Day)

Soffit formwork to slabs

3 days

Soffit formwork to beams

7 days

Props to slabs

a. Spanning up to 4.5 m

b. Spanning over 4.5 m

7 days

14 days

Props to beams and arches

a. Spanning up to 6 m

b. Spanning over 6 m

14 days

21 days

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