Question

A steel column is to support a factored load of $1200kN$. The column ends are flushed for complete bearing at a section where it is to be spliced as shown in figure. The allowable stress in the splice plate is $240MPa$. The thickness (in mm, rounded off to the multiple of 2) of the splice is: (Take the width of splice plate is $250mm$)

• A. $4mm$
• B. $6mm$
• C. $8mm$
• D. $10mm$

Answer 1

The correct option is B $6mm$

Since column ends are flushed, hence $50$ % of load is transfered through the splice and fastenings.

The load on each splice plate $=\frac{1200\times {10}^3}{4}=300\times {10}^{3}N$

Sectional area of splice plate $=\frac{300\times {10}^3}{240}N/m{m}^2$

$=1250m{m}^2$.

Thickness of splice plate $=\frac{1250}{250}=5\approx 6mm$