AISC 360-22ASTM A992 / A6W21 Series
AISC W21x275 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 | 275 lb/ft | 409.2 kg/m |
| Cross-Sectional Area | A | 81.8 in² | 52774 mm² |
| Overall Depth | d | 24.1 in | 612.1 mm |
| Flange Width | bf | 12.9 in | 327.7 mm |
| Flange Thickness | tf | 2.19 in | 55.6 mm |
| Web Thickness | tw | 1.22 in | 31 mm |
| Flange Centroid Distance | ho | 21.9 in | 556.3 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 7690 in⁴ | 3200.8 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 638 in³ | 10455 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 749 in³ | 12274 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 9.7 in | 246.4 mm |
| Weak-Axis Inertia | Iy | 787 in⁴ | 327.6 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 122 in³ | 1999 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 191 in³ | 3130 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 3.1 in | 78.7 mm |
| Torsional Constant | J | 107 in⁴ | 44537 ×10³ mm⁴ |
| Warping Constant | Cw | 148579.8 in⁶ | 25349.8 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.68 in | 93.5 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
2808.8 kip-ft
3811 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
793.9 kips
3533.9 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
2.95
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
16.2
✓ Compact Web (λw ≤ 90.5)