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. (

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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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 ) 

 

 

please i need answer thank you

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