AISC 360-22ASTM A992 / A6W16 Series
AISC W16x31 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 | 31 lb/ft | 46.1 kg/m |
| Cross-Sectional Area | A | 9.13 in² | 5890 mm² |
| Overall Depth | d | 15.9 in | 403.9 mm |
| Flange Width | bf | 5.53 in | 140.5 mm |
| Flange Thickness | tf | 0.44 in | 11.2 mm |
| Web Thickness | tw | 0.275 in | 7 mm |
| Flange Centroid Distance | ho | 15.5 in | 393.7 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 375 in⁴ | 156.1 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 47.2 in³ | 773 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 54 in³ | 885 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 6.41 in | 162.8 mm |
| Weak-Axis Inertia | Iy | 12.4 in⁴ | 5.2 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 4.5 in³ | 74 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 7 in³ | 115 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 1.17 in | 29.7 mm |
| Torsional Constant | J | 0.461 in⁴ | 192 ×10³ mm⁴ |
| Warping Constant | Cw | 1163.1 in⁶ | 198.4 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 1.42 in | 36.1 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
202.5 kip-ft
274.8 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
118.1 kips
525.5 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
6.28
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
54.6
✓ Compact Web (λw ≤ 90.5)