DesignWerx Single Span Purlin Design Output file (7/12/2010 8:21:09 PM)

Size: CFLC 125x50x20x2.5

Design Failed

Span Length: 3.475

Purlin Spacing: 1.75

Own Weight of roof covering: 6.14

Own Weight of purlin: 4.84

Live Load: 0.5

Wind Load: 0.75

Resultant Cpe + Cpi factor: 1.8

Purlin Properties:

A: 0.616

Ixx: 1.45

Cb: 1

Zxc: 23.2

Ry: 18.7

fy(MPA): 250

J: 1.28

Cw: 0.8

f'(MPa) = (1.11 x fy): 277.5

Max allowable deflection: 19.3056mm

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Load Combination 1 (DL):

Servicibility: Resultant () DL - W (kN/m) = 0.1529

Ultimate Limit State: Resultant () DL - W (kN/m) = 0.2293

Min Calculated Ixx: 0.0741 (X10^6)

Bending Moments:

Mu (kN.m) = (0,125Wl): 0.3461

fc(MPa): 250

Mr (kN.m) = 0,9.Zc.fc: 5.22

Final Result for Load Combination C1 - Bending: OK

Deflection:

defl. (mm) = 5Wl^4/384EI: 6.2364

Final Result for Load Combination C1 - Deflection: OK

Calc Check:

(Mu/Mr) + (Vu/Vr)