Situation 8: Light grade steel channels are used as purlins as shown in the figure. The top chords ofthe truss are inclined at 1V:4H. The trusses are spaced at 6m on center. The purlins are spaced at 6m on center. The purlins are spaced at 1.20m on centers. The roof are as follows: Dead load including roof materials Live load Wind load 720MPA 1,000MPA 1,440MPA Wind pressure coefficient Windward Leeward 0.20 0.60 Channel properties Section modulus, S. Section modulus, S Weight 6.19x10 mm 1.38x10 mm 79/m The allowable bending stresses are E = 207MPA and E = 207MPA. Assume that all %3D the loads pass through the centroid of the channels. 1.20 1.20 EEÉ Ë È EE agrod

ASSIGNMENT #6 CASE 2 Purlin Design The figure shown has trusses 5.5m apart with midpoint sag rods and Purlins spaced 2.5m on center. The roof truss is inclined 1 vertical to 2 horizontal. The weight of roofing materials is 0.8 kPa, wind load is 0.7 kPa perpendicular to the roof surface, minimum roof live load is 0.6 kPa. Design a channel section of steel Fy = 345 mPa, for the purlins. Use LRFD and ASD of NSCP 2015.

Please answer with a complete solution. Thank you! The roof truss is supported by a hinge at A and a horizontal roller support at B. The wind loads are perpendicular to BC. Determine the reactions at A and B.

Find 5 internal forces of the truss members, Also Find all zero force member. Thank you.

2: The truss is supported by a pin in point A and a roller at point E. Show your FBD 2 m F 5 kN. B 3 m A E 10 kN 5 m 5 m