FB · Flat Bars

100x12FB

100x12FB Flat Bar

  • AS/NZS 3679.1:2016
  • Design: AS 4100:2020
  • Unverified
Weight Surface area Equivalents XML
Mass9.42kg/m
A1,200mm²
Ix0.01410⁶ mm⁴
Zx2.410³ mm³
100x12FB cross-section
Cross-section drawn to scale from nominal dimensions. Cross-hair marks the centroid.

Dimensions

ParameterSymbolValueUnitData
Widthb100.0mmU
Thicknesst12.0mmU

Section Properties

ParameterSymbolValueUnitData
General
Mass per metre mass9.42kg/mC
Gross area A1,200mm²C
About x-axis (major)
Second moment of area IxBending about the minor (thickness) axis Ix0.01410⁶ mm⁴C
Elastic section modulus Zx (min) Zx2.410³ mm³C
Radius of gyration rx rx3.5mmC
About y-axis (minor)
Second moment of area IyBending about the major (width) axis Iy1.00010⁶ mm⁴C
Elastic section modulus Zy (min) Zy20.010³ mm³C
Radius of gyration ry ry28.9mmC
Torsion & warping
Torsion constant Jbt³/3·(1−0.63t/b) J0.05310⁶ mm⁴C
Surface area
External surface area extArea0.224m²/mC

Steel Grades

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

Strengths shown for governing thickness t = 12.0 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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