Which of the following best gives the purlin load wuy? See loaded purlin. The figure shown has trusses 6m apart with midpoint sag rods and Purlins C150x12.5 spaced 2.5m on center. The roof truss is inclined 1 vertical to 2 horizontal. The weight of roofing materials is 0.9 kPa (includes self wt.), wind load is 0.8 kPa perpendicular to the roof surface, minimum roof live load is 0.6 kPa. Consider the roofing to provide full lateral support of the purlins. Fy = 345 mPa. Use the NSCP 2015 specifications. Wuy SECTION 4.35 kN/m Wt A kN/m mm^2 mm mm C150x12.5 0.12 11400 12.7 5.56 kN/m Wux O 25.02 kN.m Purlin Load xd tw by mm mm 152 5.1 48 2.5m roofing tf Ix Sx mm mm^4 mm^3 8.7 143 1100 2.5m TRUSS TOP CHORD 2 1 2.5m mm 112 rx ly Sy mm^4 mm^3 48.4 378 Truss Spacing = 6m Purtins C150x12.5 Zx Zy ry mm mm^3 mm^3 65.2 1230 574
Which of the following best gives the purlin load wuy? See loaded purlin. The figure shown has trusses 6m apart with midpoint sag rods and Purlins C150x12.5 spaced 2.5m on center. The roof truss is inclined 1 vertical to 2 horizontal. The weight of roofing materials is 0.9 kPa (includes self wt.), wind load is 0.8 kPa perpendicular to the roof surface, minimum roof live load is 0.6 kPa. Consider the roofing to provide full lateral support of the purlins. Fy = 345 mPa. Use the NSCP 2015 specifications. Wuy SECTION 4.35 kN/m Wt A kN/m mm^2 mm mm C150x12.5 0.12 11400 12.7 5.56 kN/m Wux O 25.02 kN.m Purlin Load xd tw by mm mm 152 5.1 48 2.5m roofing tf Ix Sx mm mm^4 mm^3 8.7 143 1100 2.5m TRUSS TOP CHORD 2 1 2.5m mm 112 rx ly Sy mm^4 mm^3 48.4 378 Truss Spacing = 6m Purtins C150x12.5 Zx Zy ry mm mm^3 mm^3 65.2 1230 574
Steel Design (Activate Learning with these NEW titles from Engineering!)
6th Edition
ISBN:9781337094740
Author:Segui, William T.
Publisher:Segui, William T.
Chapter5: Beams
Section: Chapter Questions
Problem 5.13.1P
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