Question

Calculate the number of M20 bolts required to connect the flange of an ISSC 200 column and a beam ISMB 400 which is carrying a reaction of 140 kN due to factored loads (take the strength of bolt as 45.3 kN).
1. 6
2. 2
3. 8
4. 4

Answer 1

Correct Answer - Option 4 : 4

Calculation:

Given,

Load at joint = 140 kN

Strength of bolt = 45.3 kN

\({\bf{No}}.{\bf\ {of}}{\rm{ }}{\bf\ {bolts}} = \frac{{{\bf{Load}}\ {\rm{ }}{\bf{at}}{\rm{ }}{\bf\ {joint}}}}{{{\bf{Strength}}\ {\rm{ }}{\bf{of}}{\rm{ }}{\bf\ {bolt}}}}\)

\({\bf{No}}.{\bf{of}}{\rm{ }}{\bf\ {bolts}} = \frac{{140}}{{45.3}}\)

No. of bolts = 3.09 

Hence, A Total of 4 bolts is required to connect the flange of an ISSC 200 column and a beam ISMB 400.