Formwork MCQ with answer and solution

Concept

Sequence of Formwork Removal

Formula

N/A

Step-by-step solution

1. Review the given question regarding the correct sequence for the removal of formwork in concrete construction. 2. Recall the load-bearing hierarchy for formwork removal: non-load-bearing vertical elements (Walls/Columns, Beam sides) are removed first, followed by bottom horizontal supports (Slab soffit, then Beam soffit). 3. Compare the given options and select Option (b) as the correct choice.

Explanation

The correct sequence for removing formwork is Walls/Columns → Beam sides → Slab soffit → Beam soffit (Option b). explanation:1. Walls/Columns (Vertical forms): Removed first because they only support their own sides and carry no heavy load once the concrete hardens. 2. Beam sides: Removed next since they are vertical surfaces and do not support the weight of the beam. 3. Slab soffit: Removed after the vertical parts, while keeping props in place to hold the weight of the slab until it gains full strength. 4. Beam soffit: Removed last because beams carry heavy loads over longer spans and need maximum time to gain strength before losing bottom support.

Shortcut

To remember the correct sequence for formwork removal, use the rule "Verticals First, Slabs Before Beams": - Verticals First: Walls/Columns → Beam sides (non-load-bearing vertical sides stripped first). - Soffits Last: Slab soffit → Beam soffit (bottom supports stripped last, with longer/heavier spans removed at the very end).

Common mistake

A common mistake is selecting option A by removing beam sides before vertical elements like walls and columns, or selecting option C or D by confusing the removal order of horizontal soffits (slab vs. beam) and vertical formwork. Students often forget that non-load-bearing vertical forms (walls and columns) must be striking/stripped first, followed by beam sides, slab soffit, and lastly beam soffit which carries the heaviest spans.