Input
Results
Effective Se (mm³, est.)—
ϕb Mn = 0.90·Se·Fy—
Mu = wu·s·L²/8—
DCR moment—
Δ_LL (live-load only)—
L/180 deflection limit—
Method
AISI S100 — laterally-braced flexure: Mn = Se·Fy, where Se is the effective section modulus from effective-width method. This tool uses tabulated Se proxies for common Z/C purlins at typical t. Always verify with detailed section calc or manufacturer data. wu = 1.2·wD + 1.6·wL (LRFD); deflection check uses w_LL only. ϕb = 0.90.