Question

A column of size 450 mm x 600 mm has unsupported length of 3m and is braced against side sway in both direction. According to IS 456-2000 the minimum eccentricity (in mm) with respect to major and minor principal axes are:

• A. 20 and 20
• B. 26 and 21
• C. 26 and 20
• D. 21 and 15

Answer 1

The correct option is B 26 and 21



$e_{min}=Max\left[\begin{array}{c}\frac{L}{500}+\frac{D}{30}\\ 20mm\end{array}\right]$

X - X will be major axis & Y-Y will be minor axis.

$e_{minyy}=\frac{3000}{500}+\frac{450}{30}=21$

$e_{minxx}=\frac{3000}{500}+\frac{600}{30}=26$