Question

Holes in beam webs should be placed at  ____ and in flanges it should be placed at ________

(a) high shear, high bending moment

(b) high bending moment, high shear

(c) low bending moment, low shear

(d) low shear, low bending moment

The question was asked in my homework.

This question is from Deflection & Holes in Beams topic in division Design of Beams of Design of Steel Structures

Answer 1

The correct choice is (d) low shear, low bending moment

To explain: Holes in beam webs have less effect on flexural strength than holes in the flanges. Holes in beam webs should be placed only at sections of low shear. In the flanges, the holes should be cut at points of low bending moment. If this is not possible, the effect of the holes should be accounted for design.