Question

A bracket plate connected to a column flange transmit a load of 100 kN as shown in the following figure. The maximum force for which the bolts should be designed is ____ kN.

Answer 1

$F_d=\frac{100}{5}=20kN$

$F_T=\frac{Mr}{\sum r^2}$

$=\frac{(100\times 0.6)\times (75\sqrt{2}\times {10}^{-3})}{(75\sqrt{2}{)}^2\times 4\times {10}^{-6}}$
$=\frac{\sqrt{2}}{10}\times 1000$
$=141.42kN$
$\theta ={45}^o$

$\Rightarrow F_1=\sqrt{(141.42{)}^2+(20{)}^2+2\times 20\times 141.42cos{45}^o}$
$=156.2kN$