A light-gage cold-formed steel channel used as purlins are simply supported on the roof truss 4m apart. Sag rods are placed at midspan. Assuming compact section and loads acting on the flange. Use ASD method. The roof continously braces the purlin. Given: Purlin Spacing = 1.5 m Slope = 15 degrees DL = 2.5 kpa LL = 2.5 kpa WL = 1.0 kpa Windward coefficient = 0.25 Properties of channel section: Sx = 185.17x10^3 mm3 Sy = 16.55x10^3 mm3 Zx = 223x10^3 mm3 Zy = 33.4x10^3 mm3 rts = 21 mm ry = 16.79mm Cb = 1.30 Determine allowable flexure strength about the y-axis and x-axis. (kN/m)
A light-gage cold-formed steel channel used as purlins are simply supported on the roof truss 4m apart. Sag rods are placed at midspan. Assuming compact section and loads acting on the flange. Use ASD method. The roof continously braces the purlin. Given: Purlin Spacing = 1.5 m Slope = 15 degrees DL = 2.5 kpa LL = 2.5 kpa WL = 1.0 kpa Windward coefficient = 0.25 Properties of channel section: Sx = 185.17x10^3 mm3 Sy = 16.55x10^3 mm3 Zx = 223x10^3 mm3 Zy = 33.4x10^3 mm3 rts = 21 mm ry = 16.79mm Cb = 1.30 Determine allowable flexure strength about the y-axis and x-axis. (kN/m)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A light-gage cold-formed steel channel used as purlins are simply supported on the roof truss 4m apart. Sag rods are placed at midspan. Assuming compact section and loads acting on the flange. Use ASD method. The roof continously braces the purlin.
Given:
Purlin Spacing = 1.5 m
Slope = 15 degrees
DL = 2.5 kpa
LL = 2.5 kpa
WL = 1.0 kpa
Windward coefficient = 0.25
Properties of channel section:
Sx = 185.17x10^3 mm3
Sy = 16.55x10^3 mm3
Zx = 223x10^3 mm3
Zy = 33.4x10^3 mm3
rts = 21 mm
ry = 16.79mm
Cb = 1.30
Determine allowable flexure strength about the y-axis and x-axis. (kN/m)
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