75x25x2.5RHS

75x25x2.5RHS Rectangular Hollow Section

Weight Surface area Equivalents XML

Mass3.60kg/m

A459mm²

Ix0.28510⁶ mm⁴

Zx7.610³ mm³

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

Dimensions

Parameter	Symbol	Value	Unit	Data
Depth	d	75.0	mm	U
Width	b	25.0	mm	U
Thickness	t	2.5	mm	U
Outer corner radius (assumed)	ro	5.0	mm	U

Parameter	Symbol	Value	Unit	Data
General
Mass per metre	mass	3.60	kg/m	C
Gross area	A	459	mm²	C
About x-axis (major)
Second moment of area Ix	Ix	0.285	10⁶ mm⁴	C
Elastic section modulus Zx (min)	Zx	7.6	10³ mm³	C
Plastic section modulus Sx	Sx	10.1	10³ mm³	C
Radius of gyration rx	rx	24.9	mm	C
About y-axis (minor)
Second moment of area Iy	Iy	0.049	10⁶ mm⁴	C
Elastic section modulus Zy (min)	Zy	3.9	10³ mm³	C
Plastic section modulus Sy	Sy	4.5	10³ mm³	C
Radius of gyration ry	ry	10.3	mm	C
Torsion & warping
Torsion constant JThin-walled closed-section approximation	J	0.144	10⁶ mm⁴	C
Surface area
External surface area	extArea	0.191	m²/m	C
Internal surface area	intArea	0.176	m²/m	C

Grade	Standard	fy MPa	fu MPa	Note	Data
C450L0	AS/NZS 1163:2016	450	500	Typical grade for SHS/RHS – confirm with supplier	U
C350L0	AS/NZS 1163:2016	350	430	Available for some sizes – confirm with supplier	U

Strengths shown for governing thickness t = 2.5 mm. Density 7850 kg/m³, E = 200 000 MPa.

Source publisher: Pending verification – nominal dimensions entered by the application developer
Source document: AS/NZS 1163:2016 Cold-formed structural steel hollow sections
Edition: 2016
Publication year: 2016
Page reference: —
Last updated: 2026-10-12
Verification status: Unverified

Outer corner radius assumed as 2.0t for property calculation; confirm against AS/NZS 1163 and the manufacturer catalogue. Typical grade: C450L0.