Purlin, provided in industrial building over roof trusses are:

| Purlin, provided in industrial building over roof trusses are:

A. Compression members

B. Tension members

C. Flexural members under uniaxial bending

D. Flexural members under biaxial bending

Please scroll down to see the correct answer and solution guide.

Right Answer is: D

SOLUTION

Explanation

Purlins are subjected to vertical loads due to dead and live loads and to loads normal to roof covering due to wind pressure. Therefore, purlins are subjected to biaxial bending.

Bending Moment in the purlin is given by

M = wl²/10,