Problem 7 The cantilever truss is part of vertical support system subjected to dead loads (D) and snow loads (S). The dead load is 70 psf (pound per square foot) and the snow load is 40 psf. The trusses are spaced at 20 ft apart. 1) Determine the joint vertical loads PD and PS acting on joints C, D, E, F, and G. 2) Determine the axial force in column JL due to dead load and due to snow load. 3) Determine the force in truss member JF due to dead load and due to snow load using the method of sections. 4) Using the LRFD load combinations, what it the maximum load Pu in column JL? 5) Using the LRFD load combinations, what it the maximum load Pu in truss member JF? D.S C% с B A o 10 DS DV OX K ZD DS E 10' J to $ 45 10¹ DS 4 F 4 H 201 10¹ D,S GV 10 I

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Plane and Space Trusses

In civil engineering, a truss is the most important structure that forms the most fundamental member of any building structure and commercial complexes. Trusses are composed of individual members or links that are interconnected by suitable joints, such as rivets, welds, or bolts, and nuts. In trusses, the interconnection leads to the formation of a series of triangles joined together such that all the triangular members behave as a single rigid body. In a simple truss, three members are connected to form a truss member. In trusses, the force always acts at the joints or the interconnection between the individual members.