AISC 360-22ASTM A992 / A6W12 Series
AISC W12x40 Properties & Dimensions
Standard wide flange I-beam cross-section properties, geometric dimensions, and LRFD design capacities per AISC Steel Construction Manual 15th/16th Edition.
Cross-Section Technical Schematic
Dual Units: Imperial (US) · SI MetricGeometric Dimensions & Area
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Nominal Weight | w | 40 lb/ft | 59.5 kg/m |
| Cross-Sectional Area | A | 11.7 in² | 7548 mm² |
| Overall Depth | d | 11.9 in | 302.3 mm |
| Flange Width | bf | 8.01 in | 203.5 mm |
| Flange Thickness | tf | 0.515 in | 13.1 mm |
| Web Thickness | tw | 0.295 in | 7.5 mm |
| Flange Centroid Distance | ho | 11.4 in | 289.6 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 307 in⁴ | 127.8 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 51.5 in³ | 844 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 57 in³ | 934 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 5.13 in | 130.3 mm |
| Weak-Axis Inertia | Iy | 44.1 in⁴ | 18.4 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 11 in³ | 180 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 16.8 in³ | 275 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 1.94 in | 49.3 mm |
| Torsional Constant | J | 0.906 in⁴ | 377 ×10³ mm⁴ |
| Warping Constant | Cw | 2266.5 in⁶ | 386.7 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 2.21 in | 56.1 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
213.8 kip-ft
290 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
94.8 kips
421.9 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
7.78
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
36.8
✓ Compact Web (λw ≤ 90.5)