StructureCalcs1200WB278
Welded Beam · AS/NZS 3679.2 · Australia / New Zealand
1200WB278 is a welded beam 1,170.0 mm deep with a 350.0 mm wide flange, weighing 278.1 kg/m. The dimensions below are the published AS/NZS 3679.2 values; the drawing is generated from them.
Welded Beams are fabricated from three plates to AS/NZS 3679.2, extending the rolled UB range to depths and capacities rolling cannot reach. A welded section has square corners by construction.
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Published dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth, d | 1,170.0 mm | 46.06 in |
| Flange width, bf | 350.0 mm | 13.78 in |
| Flange thickness, tf | 25.0 mm | 0.984 in |
| Web thickness, tw | 16.0 mm | 0.630 in |
| Mass per metre | 278.1 kg/m | 186.8 lb/ft |
| Area, A | 35,420 mm² | 54.90 in² |
| Second moment, Ix | 7,609,883,167 mm⁴ | 18,282.8 in⁴ |
| Second moment, Iy | 179,000,000 mm⁴ | 430.0 in⁴ |
Derived section properties
Integrated from the section's exact plate outline — a welded section has square corners by construction, so nothing is approximated. For 1200WB278 the computed area agrees to better than 0.01% and Ix to better than 0.01%. Where a value is also published, the published one above is the one to quote.
| Property | Value |
|---|---|
| Elastic modulus, Zx | 13,008,347 mm³ |
| Elastic modulus, Zy | 1,023,018 mm³ |
| Plastic modulus, Sx | 15,036,350 mm³ |
| Plastic modulus, Sy | 1,602,930 mm³ |
| Radius of gyration, rx | 463.5 mm |
| Radius of gyration, ry | 71.1 mm |
Z is the elastic modulus and S the plastic modulus, following AS 4100. Under AISC 360 the letters are reversed.
Neighbouring sizes
Where these numbers come from
Published AS/NZS 3679.2 values. How StructureCalcs verifies its numbers · Understanding steel section properties · Query this section over the API