Design a purlin for a roof truss having the following data:
Span of the truss = 6m
Spacing of the truss = 3m c/c
Inclination of the roof = 30
Spacing of purlin = 2m c/c
Wind pressure = 1.5kN/m2
Roof coverage = A.C sheeting weighing 200N/m2
Provide a channel section purlin
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