Question #219480

Determine the adequacy of Bolt B when 20mm diameter A325 bolts are used with threaded excluded from the shear planes. Assume the strength of the column and the ST section does not govern. The value of F is 500kN, with a 60-degree angle from the horizontal. Bolts A F Bolts B

Expert's answer

For ASTM A325= yield strength "= 92 ksi =634.318 N\/mm^2"

Shear stress acting on bolts "F= 500 cos 60=250 kN"

"A=2 (\\frac{\\pi}{4}*20^2) =628.3 mm^2"

Shear stress due to load= "\\frac{250000}{628.3}= 397.89 N\/mm2"

Nominal strength for two bolts > shear stress acting on the bolts

"2* 634.318 N\/mm ^2>397.89 N\/mm^2"

"1268.636 N\/mm^2 >397.89 N\/mm^2"

Therefore bolts are adequate

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