Unformatted text preview: 'l [:1 *\ PROBLEM 1.45 PROBLEM 1.46 1.45 Three %  in.diameter steel bolts are to he used to attach the steel plate shown to a wooden beam. Knowing that the plate will support a 24kip load and that the
ultimate shearing stress for the steei used is 52 ksi, determine the factor of safety for this design.
SOLUTION F" M be“ A =35? M53); = mm on
Pu Aft. = (O.4WS’)(5'2): 22.97 lit'ps
Per bolf P : 3i : 8 Rip: 3
Rs.=%= igﬂ— :2.37 4 1.46 Three steel bolts are to be used to attach the steel plate shown to a wooden beam.
Knowing that the plate will support a 24kip load, that the ultimate shearing stress for
the steel used is 52 ksi, and that a factor of safety of 3.37 is desired, determine the
required diameter of the bolts. SOLUTION For Basin loo}? P: %i = 8 Mr:
Required Pu :(F.S.)P = (3.37)(8). 26.9; mpg . 1
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