StructureCalcsM3X2.9
Miscellaneous Beam · AISC Shapes Database v15.0 · United States
M3X2.9 is a miscellaneous light beam 76.2 mm deep with a 57.2 mm wide flange, weighing 4.3 kg/m. The dimensions below are the published AISC Shapes Database v15.0 values; the drawing is generated from them.
M-shapes are light I-sections that fall outside the W series — small beams for light framing.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 76.2 mm | 3.00 in |
| Flange width, bf | 57.2 mm | 2.25 in |
| Flange thickness, tf | 3.3 mm | 0.130 in |
| Web thickness, tw | 2.3 mm | 0.090 in |
| Mass per metre | 4.3 kg/m | 2.9 lb/ft |
| Area, A | 590 mm² | 0.91 in² |
| Second moment, Ix | 624,347 mm⁴ | 1.5 in⁴ |
| Second moment, Iy | 103,225 mm⁴ | 0.3 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 M3X2.9 the computed area agrees with the published value to 0.08% and Ix to 0.01%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Sx | 16,389 mm³ |
| Elastic modulus, Sy | 3,615 mm³ |
| Plastic modulus, Zx | 18,292 mm³ |
| Plastic modulus, Zy | 5,636 mm³ |
| Radius of gyration, rx | 32.5 mm |
| Radius of gyration, ry | 13.2 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