65x65x3.0SHS

65x65x3.0SHS Square Hollow Section

Weight Surface area Equivalents XML

Mass5.66kg/m

A721mm²

Ix0.45410⁶ mm⁴

Zx14.010³ mm³

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

Dimensions

Parameter	Symbol	Value	Unit	Data
Depth	d	65.0	mm	U
Width	b	65.0	mm	U
Thickness	t	3.0	mm	U
Outer corner radius (assumed)	ro	6.0	mm	U

Parameter	Symbol	Value	Unit	Data
General
Mass per metre	mass	5.66	kg/m	C
Gross area	A	721	mm²	C
About x-axis (major)
Second moment of area Ix	Ix	0.454	10⁶ mm⁴	C
Elastic section modulus Zx (min)	Zx	14.0	10³ mm³	C
Plastic section modulus Sx	Sx	16.6	10³ mm³	C
Radius of gyration rx	rx	25.1	mm	C
About y-axis (minor)
Second moment of area Iy	Iy	0.454	10⁶ mm⁴	C
Elastic section modulus Zy (min)	Zy	14.0	10³ mm³	C
Plastic section modulus Sy	Sy	16.6	10³ mm³	C
Radius of gyration ry	ry	25.1	mm	C
Torsion & warping
Torsion constant JThin-walled closed-section approximation	J	0.733	10⁶ mm⁴	C
Surface area
External surface area	extArea	0.250	m²/m	C
Internal surface area	intArea	0.231	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 = 3.0 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.