AISC 360-22ASTM A992 / A6W21 Series
AISC W21x101 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 | 101 lb/ft | 150.3 kg/m |
| Cross-Sectional Area | A | 29.8 in² | 19226 mm² |
| Overall Depth | d | 21.4 in | 543.6 mm |
| Flange Width | bf | 12.3 in | 312.4 mm |
| Flange Thickness | tf | 0.8 in | 20.3 mm |
| Web Thickness | tw | 0.5 in | 12.7 mm |
| Flange Centroid Distance | ho | 20.6 in | 523.2 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 2420 in⁴ | 1007.3 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 227 in³ | 3720 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 253 in³ | 4146 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 9.02 in | 229.1 mm |
| Weak-Axis Inertia | Iy | 248 in⁴ | 103.2 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 40.3 in³ | 660 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 61.7 in³ | 1011 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 2.89 in | 73.4 mm |
| Torsional Constant | J | 5.21 in⁴ | 2169 ×10³ mm⁴ |
| Warping Constant | Cw | 41237.2 in⁶ | 7035.6 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.35 in | 85.1 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
948.8 kip-ft
1287.3 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
288.9 kips
1286.1 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
7.69
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
39.6
✓ Compact Web (λw ≤ 90.5)