155BT20.2

155BT20.2 Tee (cut from 310UB40.4) — parent section 310UB40.4

Weight Surface area Equivalents XML

Mass20.44kg/m

A2,604mm²

Ix4.78210⁶ mm⁴

Zx39.410³ mm³

Cross-section drawn to scale from nominal dimensions. Cross-hair marks the centroid.

Dimensions

Parameter	Symbol	Value	Unit	Data
Depth	d	152.0	mm	C
Flange width	bf	165.0	mm	U
Flange thickness	tf	10.2	mm	U
Web thickness	tw	6.1	mm	U
Root radius	r1	11.4	mm	U

Parameter	Symbol	Value	Unit	Data
General
Mass per metre	mass	20.44	kg/m	C
Gross area	A	2,604	mm²	C
Centroid ȳ (from bottom)	yc	121.5	mm	C
About x-axis (major)
Second moment of area Ix	Ix	4.782	10⁶ mm⁴	C
Elastic section modulus Zx (min)Minimum (stem tip)	Zx	39.4	10³ mm³	C
Plastic section modulus Sx	Sx	69.2	10³ mm³	C
Radius of gyration rx	rx	42.9	mm	C
About y-axis (minor)
Second moment of area Iy	Iy	3.823	10⁶ mm⁴	C
Elastic section modulus Zy (min)	Zy	46.3	10³ mm³	C
Plastic section modulus Sy	Sy	71.1	10³ mm³	C
Radius of gyration ry	ry	38.3	mm	C
Torsion & warping
Torsion constant JApproximate thin-walled value, fillets neglected	J	0.069	10⁶ mm⁴	C
Surface area
External surface area	extArea	0.624	m²/m	C

Grade	Standard	fy MPa	fu MPa	Note	Data
300	AS/NZS 3679.1:2016	320	440	Grade of the parent section	U

Strengths shown for governing thickness t = 10.2 mm. Density 7850 kg/m³, E = 200 000 MPa.

Source publisher: Pending verification – nominal dimensions entered by the application developer
Source document: Derived from parent AS/NZS 3679.1 section (cut at mid-depth)
Edition: —
Publication year: —
Page reference: —
Last updated: 2026-10-12
Verification status: Unverified

Tee obtained by cutting the parent section at mid-depth; cutting kerf neglected. Parent dimensions are UNVERIFIED.