Question

A rolled I-section beam is supported on a 75 mm wide bearing plate as shown in the figure. Thickness of flange and web of the I-section are 20 mm and 8 mm, respectively. Root radius of I-section is 10 mm. Assuming:

$\text{material yield stress,}{f}_y=250MPaand$
$\text{partial safety factor for material,}{\gamma }_{mo}=1.10$


As per IS: 800-2007, the web bearing strength (in kN, round off to 2 decimal places) of the beam is _____.

Answer 1

$\text{Effective area in bearing}=[75+2.5\text{(flange thickness + root radius)}]\times 8$
$=[75+2.5(20+10\left)\right]\times 8$
$=1200{mm}^2$
$\text{So, web bearing strength}=A_g\frac{f_y}{1.1}$

$=1200\times \frac{250}{1.1}\times {10}^{-3}$

$=272.73kN$