AISC 360-22ASTM A992 / A6W30 Series
AISC W30x391 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 | 391 lb/ft | 581.9 kg/m |
| Cross-Sectional Area | A | 115 in² | 74193 mm² |
| Overall Depth | d | 33.2 in | 843.3 mm |
| Flange Width | bf | 15.6 in | 396.2 mm |
| Flange Thickness | tf | 2.44 in | 62 mm |
| Web Thickness | tw | 1.36 in | 34.5 mm |
| Flange Centroid Distance | ho | 30.8 in | 782.3 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 20700 in⁴ | 8616 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 1250 in³ | 20484 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 1450 in³ | 23761 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 13.4 in | 340.4 mm |
| Weak-Axis Inertia | Iy | 1550 in⁴ | 645.2 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 198 in³ | 3245 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 310 in³ | 5080 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 3.67 in | 93.2 mm |
| Torsional Constant | J | 173 in⁴ | 72008 ×10³ mm⁴ |
| Warping Constant | Cw | 576061.4 in⁶ | 98284.1 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 4.37 in | 111 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
5437.5 kip-ft
7377.9 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
1219.1 kips
5427 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
3.2
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
20.8
✓ Compact Web (λw ≤ 90.5)