Excel Design Work Sheet for PurlinsFull description
Design of purlins for light gauge steel structures based on BS 5950-5
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FORMULARIO FONSAT
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Steel Purlins / Girts based on 2001 Edition of the AISI Specification for the Design of Cold-Formed Steel Structural Members with 2004 Supplement property of One Page Calculations
Mark: Purlin USE: 8"x2.5"x14 ga. C-Purlin
(SteelCo or Equal)
Continuous over more than One Span(Y/N): N span = 20.00 ft
spacing = 5.00 ft
DL = 2.00 psf
w(DL) = 13.5 plf
Fy = 55 ksi Fb = 33 ksi
LL = 21.00 psf
w(DL + LL) = 118.5 plf
Sx = 2.263 in^3
wind uplift = 14.50 psf
w(DL + wind) = -59.0 plf
Area = 1.043 in^2 I = 9.823 in^2
Load Case
Stress Check M (kip-ft) fb (ksi)
Deflection DL(inches)
TL(inches)
DL + LL
5.93
31.43
< Fb - OK
0.17
1.50
DL + wind
-2.95
15.63
< Fb - OK
0.17
-0.75
Mark: Girt USE: 8"x2.5"x16 ga. C-Purlin
(SteelCo or Equal)
Continuous over more than One Span(Y/N): Y span = 25.00 ft
spacing = 5.00 ft
DL = 0.00 psf LL = 1.00 psf
w(DL) = 2.9 plf w(DL + LL) = 7.9 plf
wind uplift = 15.90 psf
w(DL + wind) = -76.6 plf
Fy = 55 ksi Fb = 33 ksi Sx = 1.756 in^3 Area = 0.839 in^2 I = 7.943 in^2
