A steel bar is attached to a wood support beam with four 22 mm diameter lag screws, as shown in the figure. The steel bar is 69-mm-wide by 8-mm-thick. For the steel bar, the yield strength is 235 MPa and the ultimate bearing strength is 350 MPa. The ultimate shear strength of the lag screws is 155 MPa. Factors of safety of 1.70 with respect to yield strength and 3.0 with respect to bearing strength are required for the bar. A factor of safety of 2.9 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.) Support beam

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A steel bar is attached to a wood support beam with four 22 mm diameter lag screws, as shown in the figure. The steel bar is 69-mm-wide by 8-mm-thick. For the steel bar, the
yield strength is 235 MPa and the ultimate bearing strength is 350 MPa. The ultimate shear strength of the lag screws is 155 MPa. Factors of safety of 1.70 with respect to yield
strength and 3.0 with respect to bearing strength are required for the bar. A factor of safety of 2.9 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.)
Support beam
Answer: Pallow=
0000
P
Steel bar
KN
Transcribed Image Text:A steel bar is attached to a wood support beam with four 22 mm diameter lag screws, as shown in the figure. The steel bar is 69-mm-wide by 8-mm-thick. For the steel bar, the yield strength is 235 MPa and the ultimate bearing strength is 350 MPa. The ultimate shear strength of the lag screws is 155 MPa. Factors of safety of 1.70 with respect to yield strength and 3.0 with respect to bearing strength are required for the bar. A factor of safety of 2.9 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.) Support beam Answer: Pallow= 0000 P Steel bar KN
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