Question SITUATION. A steel channel is used as a purlin of a truss. The top chord of the truss is inclined at a slope of 1 vertical to 4 horizontal and the distance between the trusses is equal to 6m. The purlin has a weight of 79 N/m and is spaced at 1.2m on centers. The dead load including the room materials is 720 Pa, the live load is known to be 1000 Pa and it is subjected to a wind load of 1440 Pa. The coefficient of pressure at leew and windward are 0.6 and 0.2 respectively. Properties of C200 x 76mm Sx 6.19x104 mm3 Sy 1.38x104 mm3 W 79 N/m Allowable bending stress Fbx Fby 207 MPa Assume all loads passes through the centroid. Determine the maximum bending stress for a load combination of 0.75(D+L+W).
Question SITUATION. A steel channel is used as a purlin of a truss. The top chord of the truss is inclined at a slope of 1 vertical to 4 horizontal and the distance between the trusses is equal to 6m. The purlin has a weight of 79 N/m and is spaced at 1.2m on centers. The dead load including the room materials is 720 Pa, the live load is known to be 1000 Pa and it is subjected to a wind load of 1440 Pa. The coefficient of pressure at leew and windward are 0.6 and 0.2 respectively. Properties of C200 x 76mm Sx 6.19x104 mm3 Sy 1.38x104 mm3 W 79 N/m Allowable bending stress Fbx Fby 207 MPa Assume all loads passes through the centroid. Determine the maximum bending stress for a load combination of 0.75(D+L+W).
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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SITUATION.
A steel channel is used as a purlin of a truss. The top chord of the truss is inclined at a slope of 1 vertical to 4 horizontal and the distance
between the trusses is equal to 6m. The purlin has a weight of 79 N/m and is spaced at 1.2m on centers. The dead load including the roof
materials is 720 Pa, the live load is known to be 1000 Pa and it is subjected to a wind load of 1440 Pa. The coefficient of pressure at leeward
and windward are 0.6 and 0.2 respectively.
Properties of C200 x 76mm
Sx 6.19x104 mm3
Allowable bending stress
129.06
Fbx Fby 207 MPa
Assume all loads passes through the centroid.
Determine the maximum bending stress for a load combination of 0.75(D+L+W)
181.15
127.11
Sy 1.38x104 mm3
O 256.17
W 79 N/m
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