Situation 1Light-grade channel is used as a purlin of a truss whose top chord is sloped at 15degrees from the horizontal.Properties of channel section:Sx = 6.19 x 10^4 mm^3Sy = 1.38 x 10^4 mm^3Simple Span = 6 m with one sagrod at L/2LoadsRoof Loads (applied at centroid of purlins)Dead Load = 0.95 kPa (including weight of purlin)Live Load = 1.2 kPaAllowable Stress:Fbx = Fby =110 MPaa. Determine the maximum spacing of purlins (m) due to dead load plus live load only. (Hint: Analyze in terms of s and DCR<= 1.0)

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a. Determine the maximum spacing of purlins (m) due to dead load plus live load only. (H

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Question

Situation 1
Light-grade channel is used as a purlin of a truss whose top chord is sloped at 15degrees from the horizontal.
Properties of channel section:
Sx = 6.19 x 10^4 mm^3
Sy = 1.38 x 10^4 mm^3
Simple Span = 6 m with one sagrod at L/2
Loads
Roof Loads (applied at centroid of purlins)
Dead Load = 0.95 kPa (including weight of purlin)
Live Load = 1.2 kPa
Allowable Stress:
Fbx = Fby =110 MPa
a. Determine the maximum spacing of purlins (m) due to dead load plus live load only. (Hint: Analyze in terms of s and DCR<= 1.0)

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