55 x 55 x 6 EA
EA · AS/NZS 3679.1 · Australia / New Zealand
55 x 55 x 6 EA is a ea 55.0 mm deep with a 55.0 mm flange, weighing 4.9 kg/m. The dimensions below are the published AS/NZS 3679.1 values; the drawing is generated from them.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 55.0 mm | 2.17 in |
| Flange width, bf | 55.0 mm | 2.17 in |
| Flange thickness, tf | — mm | — in |
| Web thickness, tw | 6.0 mm | 0.236 in |
| Mass per metre | 4.9 kg/m | 3.3 lb/ft |
| Area, A | 628 mm² | 0.97 in² |
| Second moment, Ix | 175,150 mm⁴ | 0.4 in⁴ |
| Second moment, Iy | 175,150 mm⁴ | 0.4 in⁴ |
| Principal maximum, Imax | 278,000 mm⁴ | 0.7 in⁴ |
| Principal minimum, Imin | 72,300 mm⁴ | 0.2 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 55 x 55 x 6 EA the computed area agrees with the published value to 0.02% and Ix to 0.15%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 4,458 mm³ |
| Elastic modulus, Zy | 4,458 mm³ |
| Plastic modulus, Sx | 8,105 mm³ |
| Plastic modulus, Sy | 8,105 mm³ |
| Radius of gyration, rx | 16.7 mm |
| Radius of gyration, ry | 16.7 mm |
| Principal maximum, Imax (derived) | 277,528 mm⁴ |
| Principal minimum, Imin (derived) | 72,259 mm⁴ |
| Principal axis angle, θp | 45.0° |
Z is the elastic modulus and S the plastic modulus, following AS 4100. Under AISC 360 the letters are reversed — S is elastic and Z is plastic.
Neighbouring sizes
Where these numbers come from
Published AS/NZS 3679.1 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API