UB · Universal Beams

180UB16.1

180UB16.1 Universal Beam

  • AS/NZS 3679.1:2016
  • Design: AS 4100:2020
  • Unverified
Weight Surface area Equivalents XML
Mass16.04kg/m
A2,044mm²
Ix10.60210⁶ mm⁴
Zx122.610³ mm³
180UB16.1 cross-section
Cross-section drawn to scale from nominal dimensions. Cross-hair marks the centroid.

Dimensions

ParameterSymbolValueUnitData
Depthd173.0mmU
Flange widthbf90.0mmU
Flange thicknesstf7.0mmU
Web thicknesstw4.5mmU
Root radiusr18.9mmU

Section Properties

ParameterSymbolValueUnitData
General
Mass per metre mass16.04kg/mC
Gross area A2,044mm²C
About x-axis (major)
Second moment of area Ix Ix10.60210⁶ mm⁴C
Elastic section modulus Zx (min) Zx122.610³ mm³C
Plastic section modulus Sx Sx138.310³ mm³C
Radius of gyration rx rx72.0mmC
About y-axis (minor)
Second moment of area Iy Iy0.85310⁶ mm⁴C
Elastic section modulus Zy (min) Zy19.010³ mm³C
Plastic section modulus Sy Sy29.410³ mm³C
Radius of gyration ry ry20.4mmC
Torsion & warping
Torsion constant JApproximate thin-walled value, fillets neglected J0.02510⁶ mm⁴C
Warping constant IwIy·(d−tf)²/4 Iw5.8810⁹ mm⁶C
Surface area
External surface area extArea0.682m²/mC

Nominal designation mass 16.10 kg/m; calculated 16.04 kg/m (-0.4%).

Steel Grades

GradeStandard fy MPafu MPa NoteData
300 AS/NZS 3679.1:2016 320 440 Typical grade supplied – confirm availability with supplier U

Strengths shown for governing thickness t = 7.0 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 3679.1:2016 Structural steel – Hot-rolled bars and sections
Edition
2016
Publication year
2016
Page reference
—
Last updated
2026-10-12
Verification status
Unverified

Nominal dimensions require verification against the current edition of the product standard and the manufacturer catalogue before design use. Properties are calculated by this application from the nominal dimensions.

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