*P4.004 *P4.004 Incorrect A steel bar is attached to a wood support beam with fo
ID: 2325029 • Letter: #
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*P4.004
*P4.004
Incorrect A steel bar is attached to a wood support beam with four 23 mm diameter lag screws, as shown in the figure. The steel bar is 63-mm-wide by 5-mm-thick. For the steel bar, the yield strength is 245 MPa and the ultimate bearing strength is 330 MPa. The ultimate shear strength of the lag screws is 155 MPa. Factors of safety of 1.75 with respect to yield strength and 2.9 with respect to bearing strength are required for the bar. A factor of safety of 2.8 with respect to the ultimate shear strength is required for the lag screws. Determine the allowable load P that can be supported by this connection. (Note: Consider only the gross cross-sectional area of the bar—not the net area.)Answer: Pallow = *1 kN
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