Question

A beam is designed for uniformly distributed loads causing compression in the supporting columns. Where is the critical section for shear? (d is effective depth of beam and L${}_d$ is development length)

• A. A distance L${}_d$/3 from the face of the support
• B. A distance d from the face of the support
• C. At the centre of the support
• D. At the mid span of the beam

Answer 1

The correct option is B A distance d from the face of the support

As per IS 456:2000 clause 22.6.2.1, when the reaction in the direction of applied shear introduces compression into the end region of the member, sections located at a distance less than 'd' may be designed for the same shear as that computed at distance 'd'.