# The effective span of a simply supported slab is

By Aina Parasher|Updated : July 4th, 2022

The effective span of a simply supported slab is-

1. Half of the clear distance plus width of column
2. 0.7 times clear distance between supports
3. The clear distance between supports
4. Centre to centre distance between supports

Answer: D. Centre to centre distance between supports

## The effective span of a simply supported slab is taken as the centre to centre distance between supports.

Solution

For simply supported beams and slabs (Leff)

Leff = minimum of { Lo+w and Lo+d }

where

Lo = clear span

d = effective depth

w = Support width

The effective span of a simply supported slab is equal to the effective depth or width of the slab plus the clear span between supports (i.e., the length up to the face of the support).

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