Question

Which of the following are correct regarding design of beams with openings?

(a) web opening should be away from support by twice the beam depth

(b) hole should be eccentrically placed in web

(c) hole should not be placed within middle one third of the span

(d) clear spacing between openings should be less than beam depth

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This key question is from Deflection & Holes in Beams in section Design of Beams of Design of Steel Structures

Answer 1

Correct answer is (a) web opening should be away from support by twice the beam depth

To elaborate: General guidelines for design of beams with openings are as follows : (i)The hole should be centrally placed in web and eccentricity should be avoided, (ii) The best location for the opening is within the middle one third of the span, (iii) Web opening should be away from support and it should be away by twice the depth of beam, (iv) Clear spacing between openings should be more than depth of beam.