FB · Flat Bars

100x8FB

100x8FB Flat Bar

  • AS/NZS 3679.1:2016
  • Design: AS 4100:2020
  • Unverified
Weight Surface area Equivalents XML
Mass6.28kg/m
A800mm²
Ix0.00410⁶ mm⁴
Zx1.110³ mm³
100x8FB cross-section
Cross-section drawn to scale from nominal dimensions. Cross-hair marks the centroid.

Dimensions

ParameterSymbolValueUnitData
Widthb100.0mmU
Thicknesst8.0mmU

Section Properties

ParameterSymbolValueUnitData
General
Mass per metre mass6.28kg/mC
Gross area A800mm²C
About x-axis (major)
Second moment of area IxBending about the minor (thickness) axis Ix0.00410⁶ mm⁴C
Elastic section modulus Zx (min) Zx1.110³ mm³C
Radius of gyration rx rx2.3mmC
About y-axis (minor)
Second moment of area IyBending about the major (width) axis Iy0.66710⁶ mm⁴C
Elastic section modulus Zy (min) Zy13.310³ mm³C
Radius of gyration ry ry28.9mmC
Torsion & warping
Torsion constant Jbt³/3·(1−0.63t/b) J0.01610⁶ mm⁴C
Surface area
External surface area extArea0.216m²/mC

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 = 8.0 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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