AISC 360-22ASTM A992 / A6W12 Series
AISC W12x79 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 | 79 lb/ft | 117.6 kg/m |
| Cross-Sectional Area | A | 23.2 in² | 14968 mm² |
| Overall Depth | d | 12.4 in | 315 mm |
| Flange Width | bf | 12.1 in | 307.3 mm |
| Flange Thickness | tf | 0.735 in | 18.7 mm |
| Web Thickness | tw | 0.47 in | 11.9 mm |
| Flange Centroid Distance | ho | 11.7 in | 297.2 mm |
Bending & Buckling Properties
| Property | Symbol | Imperial (US) | Metric (SI) |
|---|---|---|---|
| Strong-Axis Inertia | Ix | 662 in⁴ | 275.5 ×10⁶ mm⁴ |
| Strong-Axis Elastic Modulus | Sx | 107 in³ | 1753 ×10³ mm³ |
| Strong-Axis Plastic Modulus | Zx | 119 in³ | 1950 ×10³ mm³ |
| Strong-Axis Radius of Gyration | rx | 5.34 in | 135.6 mm |
| Weak-Axis Inertia | Iy | 216 in⁴ | 89.9 ×10⁶ mm⁴ |
| Weak-Axis Elastic Modulus | Sy | 35.8 in³ | 587 ×10³ mm³ |
| Weak-Axis Plastic Modulus | Zy | 54.3 in³ | 890 ×10³ mm³ |
| Weak-Axis Radius of Gyration | ry | 3.05 in | 77.5 mm |
| Torsional Constant | J | 3.84 in⁴ | 1598 ×10³ mm⁴ |
| Warping Constant | Cw | 11537 in⁶ | 1968.4 ×10⁹ mm⁶ |
| Effective Radius of Gyration | rts | 3.43 in | 87.1 mm |
AISC 360-22 Design Capacities (Fy = 50 ksi / 345 MPa)
Plastic Moment Capacity (φMp)
446.3 kip-ft
605.5 kN·m (φ = 0.90)Nominal Shear Capacity (φVn)
157.4 kips
700.5 kN (φ = 0.90)Flange Slenderness (λf = bf / 2tf)
8.23
✓ Compact Flange (λf ≤ 9.15)Web Slenderness (λw = h / tw)
23.3
✓ Compact Web (λw ≤ 90.5)