Question

Why is a small gap left behind the walls while mounting a girder for roofing? Explain.

Answer 1

1. Small spaces are left behind the walls while mounting the girders to save the structure.
2. This is because the expansion in summer and contraction in winter can lead to instability in the structure.
3. So to allow the expansion and contraction, a small gap is left behind the walls while mounting a girder for roofing.