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between the trusses. The weight of the roofing materials, including the weight of pur vice live load is 1.20 KPa of horizontal projection of the roof surface. The allowable to

between the trusses. The weight of the roofing materials, including the weight of pur vice live load is 1.20 KPa of horizontal projection of the roof surface. The allowable to

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Find;

-Is a W12 x 14 adequate for the purlins considering moment, shear and deflection? 0

-If a W10 x 12 is used for the purlins, compute the allowable moment strength for the y-axis in KN.m. 0

-Select the lightest W-shape for the purlins considering moment, shear and deflection.0

The truss shown is spaced at 5.5 m apart. Purlins are located at the joints and halfway between the joints. Sag rods are located midway between the trusses. The weight of the roofing materials, including the weight of purlins and insulation, is 0.85 KPa and the roof service live load is 1.20 KPa of horizontal projection of the roof surface. The allowable total (DL+Lr) deflection is L/240 where L is the length of the purlins between supports. A992 steel (Fy= 350 MPa and Fu= 450 MPa) is used. Use ASD. 604.5m= 27m 4,5m
Transcribed Image Text:The truss shown is spaced at 5.5 m apart. Purlins are located at the joints and halfway between the joints. Sag rods are located midway between the trusses. The weight of the roofing materials, including the weight of purlins and insulation, is 0.85 KPa and the roof service live load is 1.20 KPa of horizontal projection of the roof surface. The allowable total (DL+Lr) deflection is L/240 where L is the length of the purlins between supports. A992 steel (Fy= 350 MPa and Fu= 450 MPa) is used. Use ASD. 604.5m= 27m 4,5m
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