StructureCalcsS12X50
American Standard Beam · AISC Shapes Database v15.0 · United States
S12X50 is an American Standard beam 304.8 mm deep with a 139.2 mm wide flange, weighing 74.4 kg/m. The dimensions below are the published AISC Shapes Database v15.0 values; the drawing is generated from them.
S-shapes are American Standard beams with narrow, tapered flanges — the oldest rolled I-profile in the catalogue, still used for crane rails and work on older structures.
Analyse this section, or combine it with plates and other shapes.
Open S12X50 in the Section CalculatorFree, no sign-up, runs in your browser.
Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 304.8 mm | 12.00 in |
| Flange width, bf | 139.2 mm | 5.48 in |
| Flange thickness, tf | 16.7 mm | 0.659 in |
| Web thickness, tw | 17.5 mm | 0.687 in |
| Mass per metre | 74.4 kg/m | 50.0 lb/ft |
| Area, A | 9,419 mm² | 14.60 in² |
| Second moment, Ix | 126,118,122 mm⁴ | 303.0 in⁴ |
| Second moment, Iy | 6,493,210 mm⁴ | 15.6 in⁴ |
Derived section properties
Integrated from the section's own outline including the root and toe radii, whose arcs are integrated analytically rather than approximated by facets. For S12X50 the computed area agrees with the published value to better than 0.01% and Ix to 0.13%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 826,450 mm³ |
| Elastic modulus, Sy | 95,767 mm³ |
| Plastic modulus, Zx | 994,451 mm³ |
| Plastic modulus, Zy | 170,526 mm³ |
| Radius of gyration, rx | 115.6 mm |
| Radius of gyration, ry | 26.6 mm |
S is the elastic modulus and Z the plastic modulus, following AISC 360. Australian and British practice reverse the letters.
Neighbouring sizes
Where these numbers come from
Published AISC Shapes Database v15.0 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API