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Two W 310 ×74 steel wide-flange beams are bolted together to form a built-up beam as shown in the figure

Mechanical Engineering

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Two W 310 ×74 steel wide-flange beams are bolted together to form a built-up beam as shown in the figure. What is the maximum permissible bolt spacing s if the shear force V=  80 kN and the allowable load in shear on each bolt is F = 13.5 kN (Note: Obtain the dimensions and properties of the W shapes from Table E-1(b).)