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https://3d-labs.com/product/aisc-bolting-design-calculation/ Required tightening moment - determined by the prestress force and affected by the friction factor in threads between the nut and bolt , and by the friction factor in the contact surface of the nut or bolt. Bolt value is the strength of the bolt. The strength of the bolt is taken as the minimum value of the following. (Shearing strength in a bolt. Bearing strength in a bolt. Tensile strength in a bolt.) The shear strength of all bolts = shear strength of one bolt x number of bolts The bearing strength of connecting/connected plates can be calculated using equations given by AISC specifications.
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