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

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Chapter5: Beams
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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.
2. 5m
2.5m
2. 5m
roofing
TRUSS TOP CHORD
Wuy,
Truss Spacing = 6m
Wux
1
Purlins C150x12.5
Purlin Load
Wt
kN/m mm^2 mm
C150x12.5 0.12 11400 12.7 152 5.1
d tw by
SECTION
Ix Sx rx ly sy
Zy
ry Zx
mm mm mm^4 mm^3 mm mm^4 mm^3 mm mm^3 mm^3
mm
mm
48
8.7
143 1100 112 48.4 378 65.2 1230 574
O 4.35 kN/m
5.56 kN/m
O 25.02 kN.m
Transcribed Image Text: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. 2. 5m 2.5m 2. 5m roofing TRUSS TOP CHORD Wuy, Truss Spacing = 6m Wux 1 Purlins C150x12.5 Purlin Load Wt kN/m mm^2 mm C150x12.5 0.12 11400 12.7 152 5.1 d tw by SECTION Ix Sx rx ly sy Zy ry Zx mm mm mm^4 mm^3 mm mm^4 mm^3 mm mm^3 mm^3 mm mm 48 8.7 143 1100 112 48.4 378 65.2 1230 574 O 4.35 kN/m 5.56 kN/m O 25.02 kN.m
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