AISC 360-22ASTM A992 / A6W21 Series
AISC W21x111 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 | 111 lb/ft | 165.2 kg/m |
| Cross-Sectional Area | A | 32.6 in² | 21032 mm² |
| Overall Depth | d | 21.5 in | 546.1 mm |
| Flange Width | bf | 12.3 in | 312.4 mm |
| Flange Thickness | tf | 0.875 in | 22.2 mm |
| Web Thickness | tw | 0.55 in | 14 mm |
| Flange Centroid Distance | ho | 20.6 in | 523.2 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 2670 in⁴ | 1111.3 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 249 in³ | 4080 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 279 in³ | 4572 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 9.05 in | 229.9 mm |
| Weak-Axis Inertia | Iy | 274 in⁴ | 114 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 44.5 in³ | 729 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 68.2 in³ | 1118 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 2.9 in | 73.7 mm |
| Torsional Constant | J | 6.83 in⁴ | 2843 ×10³ mm⁴ |
| Warping Constant | Cw | 45959 in⁶ | 7841.2 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.37 in | 85.6 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
1046.3 kip-ft
1419.6 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
319.3 kips
1421.3 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
7.03
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
35.9
✓ Compact Web (λw ≤ 90.5)