Steel Beam Designer

AISC 360-22 · Rolled Shapes & Built-Up Plate Girders

LRFD
📋 Project Information
🔩 Section & Material

Wide-flange (most common beams)

Cross-Section

xyd = 15.9″b_f = 5.53″t_f = 0.44″t_w = 0.275″flangeW16X31W-Shape cross-section · dimensions in inches

Section Properties

d = 15.90″
bf = 5.53″
tf = 0.44″
tw = 0.28″
k = 0.84″
A = 9.13 in²
Ix = 375.0
Sx = 47.2
Zx = 54.0
rx = 6.41
ry = 1.17
rts = 1.42
J = 0.461
Cw = 739.0
ho = 15.50″
bf/2tf = 6.28
h/tw = 51.69
wt ≈ 31.0 plf
📐 Geometry & Supports
⚡ Applied Forces

Service Loads (for deflection)

🛡️ Design Parameters

LRFD: φb=0.90, φv=0.90–1.00 · ASD: Ωb=1.67, Ωv=1.50–1.67

Section · Method

W16X31 (LRFD)

❌ FAIL

Governing: Flexure (DCR = 2.595)

Demand / Capacity Ratios
FlexureDCR = 2.595
Demand: 120.00 kip-ftCapacity: 46.25 kip-ft
ShearDCR = 0.305
Demand: 40.00 kipsCapacity: 131.18 kips
Deflection (Live)DCR = 0.970
Demand: 0.808 inCapacity: 0.833 in
Deflection (Total)DCR = 0.970
Demand: 1.212 inCapacity: 1.250 in
Section Classification

Flange

Compact

Web

Compact

Overall

Compact