WB · Welded Beams

800WB122

800WB122 Welded Beam

  • AS/NZS 3679.2:2016
  • Design: AS 4100:2020
  • Unverified
Weight Surface area Equivalents XML
Mass123.09kg/m
A15,680mm²
Ix1,738.07810⁶ mm⁴
Zx4,389.110³ mm³
800WB122 cross-section
Cross-section drawn to scale from nominal dimensions. Cross-hair marks the centroid.

Dimensions

ParameterSymbolValueUnitData
Depthd792.0mmU
Flange widthbf300.0mmU
Flange thicknesstf16.0mmU
Web thicknesstw8.0mmU

Section Properties

ParameterSymbolValueUnitData
General
Mass per metre mass123.09kg/mC
Gross area A15,680mm²C
About x-axis (major)
Second moment of area Ix Ix1,738.07810⁶ mm⁴C
Elastic section modulus Zx (min) Zx4,389.110³ mm³C
Plastic section modulus Sx Sx4,880.010³ mm³C
Radius of gyration rx rx332.9mmC
About y-axis (minor)
Second moment of area Iy Iy72.03210⁶ mm⁴C
Elastic section modulus Zy (min) Zy480.210³ mm³C
Plastic section modulus Sy Sy732.210³ mm³C
Radius of gyration ry ry67.8mmC
Torsion & warping
Torsion constant JApproximate thin-walled value, fillets neglected J0.94910⁶ mm⁴C
Warping constant IwIy·(d−tf)²/4 Iw10,844.0510⁹ mm⁶C
Surface area
External surface area extArea2.768m²/mC

Nominal designation mass 122.00 kg/m; calculated 123.09 kg/m (+0.9%).

Steel Grades

GradeStandard fy MPafu MPa NoteData
300 AS/NZS 3679.2:2016 300 430 Typical grade – confirm with manufacturer U

Strengths shown for governing thickness t = 16.0 mm. Density 7850 kg/m³, E = 200 000 MPa.

Source & Verification

Source publisher
Pending verification – nominal dimensions entered by the application developer
Source document
AS/NZS 3679.2:2016 Structural steel – Welded I sections
Edition
2016
Publication year
2016
Page reference
—
Last updated
2026-10-12
Verification status
Unverified

Welded section: web-to-flange fillet welds neglected in calculated properties. Nominal dimensions require verification against AS/NZS 3679.2 and the manufacturer catalogue.

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