AISC 360-22ASTM A992 / A6W12 Series
AISC W12x87 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 | 87 lb/ft | 129.5 kg/m |
| Cross-Sectional Area | A | 25.6 in² | 16516 mm² |
| Overall Depth | d | 12.5 in | 317.5 mm |
| Flange Width | bf | 12.1 in | 307.3 mm |
| Flange Thickness | tf | 0.81 in | 20.6 mm |
| Web Thickness | tw | 0.515 in | 13.1 mm |
| Flange Centroid Distance | ho | 11.7 in | 297.2 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 740 in⁴ | 308 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 118 in³ | 1934 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 132 in³ | 2163 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 5.38 in | 136.7 mm |
| Weak-Axis Inertia | Iy | 241 in⁴ | 100.3 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 39.7 in³ | 651 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 60.4 in³ | 990 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 3.07 in | 78 mm |
| Torsional Constant | J | 5.1 in⁴ | 2123 ×10³ mm⁴ |
| Warping Constant | Cw | 13016.5 in⁶ | 2220.8 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.46 in | 87.9 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
495 kip-ft
671.6 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
173.8 kips
773.7 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
7.47
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
21.1
✓ Compact Web (λw ≤ 90.5)