- A Light Gage Cold Formed Steel Channel Used As Purlins Are Simply Supported On The Roof Truss 4m Apart Sag Rods Are Pla 1 (63.99 KiB) Viewed 37 times
B.Determine allowable flexure strength about x-axis (kNm)
C. Determine the interaction ratio
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 continuously braces the purlin. Given: • Purlin spacing = 1.5m • Slope 15 degrees = • Dead Load = 2.5kPa • Live Load = 2.5kPa • Wind Load = 1.0kPa • Windward coefficient = 0.25 Properties of channel section: ● Sx = 185.17x10³ mm³ • Sy = 16.55x10³ mm³ ● Zx = 223x10³ mm³ ● Zy = 33.4x103 mm³ • Its = 21mm ● • ry= 16.79mm • Cb = 1.30