Calculate bearing strength of 20mm diameter bolt of grade 4.6 for joining main plates of 10mm thick using cover plate of 8mm thick using single cover butt joint.

Calculate bearing strength of 20mm diameter bolt of grade 4.6 for joining main plates of 10mm thick using cover plate of 8mm thick using single cover butt joint. Correct Answer 50.18 kN

diameter of bolt = 16mm, diameter of hole =16+2 =18mm e=1.5×18=27mm, p=2.5×16=40mm e/3d0 = 27/(3×18) = 0.5, p/3d0 -0.25 = 40/(3×18) -0.25=0.49, fub /fb = 400/410=0.975 kb = minimum of (e/3d0, p/3d0 -0.25, fub /fb,1) = 0.49 bearing strength = 2.5kbdtfu/1.25 = 2.5×0.49x16x8x400x10-3/1.25 = 50.18 kN.
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