(Solved): Fink trusses spaced at 6m on centers support W6 12 purlins as shown. The purlins are supported ...

Fink trusses spaced at $$6\mathrm{m}$$ on centers support W6 $$\times 12$$ purlins as shown. The purlins are supported at their midpoints by sag rods. Use A36 steel and design the sag rods and the tie rod at the ridge for the following service loads: - Metal deck: $$d_1:=96\mathrm{Pa}$$ - Built-up roof: $$d_2:=240\mathrm{Pa}$$ - Roof live load: $$l_r:=860\mathrm{Pa}$$ (horizontal projection on the roof surface) - Purlin weight: $$d_3:=12\frac{lbf}{ft}$$ Determine the minimum required size (commercial) of sag rod in $$\mathrm{mm}$$ : Determine the practical size (commercial) of sag rod in $$\mathrm{mm}$$ : Determine the minimum required size (commercial) of tie rod in $$\mathrm{mm}$$ : Determine the practical size (commercial) of tie rod in $$\mathrm{mm}$$ :