A 20m Fink Truss are spaced at 'S' meters o.c. the purlins are made up of C10X20 sections and are spaced 1.1967m on centers. The truss has a height of 4m. Roof LL is 'RLL' N/m2 of roof surface and roof covering is assumed to be 'RDL' N/m2 of roof surface. Determine whether the purlins are adequate to carry such loadings.   Given:  Fy=248 MPa w=29.76 Kg/m A=3787.09 mm^2 Ix=32.84×10^6 mm^4 Iy=1.17×10^6 mm4 Zx=317.91×10^3 mm3

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Chapter2: Loads On Structures
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Considering sag rods and tie rods at midspan, what is the maximum moment about minor axis in N-m? (2 decimal places)

 A 20m Fink Truss are spaced at 'S' meters o.c. the purlins are made up of C10X20 sections and are spaced 1.1967m on centers. The truss has a height of 4m. Roof LL is 'RLL' N/m2 of roof surface and roof covering is assumed to be 'RDL' N/m2 of roof surface. Determine whether the purlins are adequate to carry such loadings.

 

Given: 

Fy=248 MPa

w=29.76 Kg/m

A=3787.09 mm^2

Ix=32.84×10^6 mm^4

Iy=1.17×10^6 mm4

Zx=317.91×10^3 mm3

Sx=258.92×10^3 mm3

Zy=44.25×10^3 mm3

Sy=21.47×10^3 mm3

S= 6 m

RLL=900 N/m^2

RDL= 900 N/m^2

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