100x50x4.0RHS

100x50x4.0RHS Rectangular Hollow Section

Weight Surface area Equivalents XML

Mass8.59kg/m

A1,095mm²

Ix1.34110⁶ mm⁴

Zx26.810³ mm³

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

Dimensions

Parameter	Symbol	Value	Unit	Data
Depth	d	100.0	mm	U
Width	b	50.0	mm	U
Thickness	t	4.0	mm	U
Outer corner radius (assumed)	ro	8.0	mm	U

Parameter	Symbol	Value	Unit	Data
General
Mass per metre	mass	8.59	kg/m	C
Gross area	A	1,095	mm²	C
About x-axis (major)
Second moment of area Ix	Ix	1.341	10⁶ mm⁴	C
Elastic section modulus Zx (min)	Zx	26.8	10³ mm³	C
Plastic section modulus Sx	Sx	34.1	10³ mm³	C
Radius of gyration rx	rx	35.0	mm	C
About y-axis (minor)
Second moment of area Iy	Iy	0.449	10⁶ mm⁴	C
Elastic section modulus Zy (min)	Zy	18.0	10³ mm³	C
Plastic section modulus Sy	Sy	20.9	10³ mm³	C
Radius of gyration ry	ry	20.3	mm	C
Torsion & warping
Torsion constant JThin-walled closed-section approximation	J	1.130	10⁶ mm⁴	C
Surface area
External surface area	extArea	0.286	m²/m	C
Internal surface area	intArea	0.261	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 = 4.0 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.