AISC 360-22ASTM A992 / A6W21 Series
AISC W21x248 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 | 248 lb/ft | 369.1 kg/m |
| Cross-Sectional Area | A | 73.8 in² | 47613 mm² |
| Overall Depth | d | 23.7 in | 602 mm |
| Flange Width | bf | 12.8 in | 325.1 mm |
| Flange Thickness | tf | 1.99 in | 50.5 mm |
| Web Thickness | tw | 1.1 in | 27.9 mm |
| Flange Centroid Distance | ho | 21.7 in | 551.2 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 6830 in⁴ | 2842.9 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 576 in³ | 9439 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 671 in³ | 10996 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 9.62 in | 244.3 mm |
| Weak-Axis Inertia | Iy | 699 in⁴ | 290.9 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 109 in³ | 1786 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 170 in³ | 2786 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 3.08 in | 78.2 mm |
| Torsional Constant | J | 80.7 in⁴ | 33590 ×10³ mm⁴ |
| Warping Constant | Cw | 129692.5 in⁶ | 22127.4 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.63 in | 92.2 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
2516.3 kip-ft
3414.2 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
703.9 kips
3133.4 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
3.22
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
17.9
✓ Compact Web (λw ≤ 90.5)