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This video shows how the Factor of Safety/Design Factor is used to determine the maximum allowable stress in designing structures such that failure does not occur.
(0:00) Allowable Stress Design: Factor of Safety/Design Factor
(3:00) Factor of Safety Equation
(3:51) Problem statement: The joint is fastened together using two bolts. Determine the required diameter of the bolts if the failure shear stress for the bolts is 350 MPa. Use a factor of safety for shear of F.S. = 2.5.
