Question

A simply supported RC beam having clear span 5 m and support width 300 mm has the crosssection as shown in figure below.



What is the effective span of the beam as per
IS:456?

• A. 5300mm
• B. 5400mm
• C. 5200mm
• D. 5150mm

Answer 1

The correct option is A 5300mm

As per clause 22.2 of IS:456-2000, for simply supported beam or slab, the effective span of a member that is not built integrally with its supports shall be taken as clear span plus the effective depth of slab or beam or centre to centre of supports. whichever is less.

$\therefore$ Effective span $=5\times 1000+400$

$=5400mm$

and effective span $=5\times 1000+\frac{300}{2}+\frac{300}{2}$

$=5300mm$