AISC 360-22ASTM A992 / A6W40 Series
AISC W40x277 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 | 277 lb/ft | 412.2 kg/m |
| Cross-Sectional Area | A | 81.5 in² | 52581 mm² |
| Overall Depth | d | 39.7 in | 1008.4 mm |
| Flange Width | bf | 15.8 in | 401.3 mm |
| Flange Thickness | tf | 1.58 in | 40.1 mm |
| Web Thickness | tw | 0.83 in | 21.1 mm |
| Flange Centroid Distance | ho | 38.1 in | 967.7 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 21900 in⁴ | 9115.5 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 1100 in³ | 18026 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 1250 in³ | 20484 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 16.4 in | 416.6 mm |
| Weak-Axis Inertia | Iy | 1040 in⁴ | 432.9 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 132 in³ | 2163 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 204 in³ | 3343 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 3.58 in | 90.9 mm |
| Torsional Constant | J | 51.5 in⁴ | 21436 ×10³ mm⁴ |
| Warping Constant | Cw | 596522.6 in⁶ | 101775.1 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 4.25 in | 108 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
4687.5 kip-ft
6360.2 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
889.7 kips
3960.5 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
5
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
44
✓ Compact Web (λw ≤ 90.5)