Assume fx and fy to be 0.66 of Fy for compact members 3 Mx 6,584.96 mm Sx = 1.73843 = = fx 264 mm3 My 109.09 0.0288 Sy = = = fy 264
Try Section
Design of Purlins 100 x 50 x 20 x 3,2 Relative properties 3 3 Sx = 410.00 x 10 mm L = 2.8 m 3 3 mm x 10 Ix = 181 Sy = 0.00 W= Total Wn = Total Wn = Total Wn =
Kg/m
6.13
Wn + W (0.00981)(cos θ) 1.839 + 6.13 ( 0.00981 ) ( cos 14 ) 1.897 KN/m
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