RHS 40x25x1 Hiasa · Weight & Dimensions

Hiasa, cold-formed sections · Rectangular Hollow Section

Rectangular Hollow Sections (RHS) are tubular profiles with excellent torsional resistance and aesthetic appeal. Used for columns, trusses, and exposed structural elements.

Also known as: PTR 40x25 cal 18 (México) · Caño estructural 40x25 (Argentina)

The RHS 40x25x1 steel profile weighs 1.0 kg/m (0.65 lb/ft), has a depth of 40 mm (1.57 in), flange width 25 mm (0.98 in). Cross-sectional area: 123.425 mm². Moment of inertia Ix = 2.715 cm⁴, Iy = 1.316 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 1 mm ≈ 18 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	40 mm	1.57 in
Width (b)	25 mm	0.98 in
Thickness (t)	1 mm	0.04 in
Fillet radius (r)	2 mm	0.08 in
Weight	1.0 kg/m	0.65 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	123.42 mm²	0.191 in²
Moment of inertia (Ix)	2.72 cm⁴	0.07 in⁴
Moment of inertia (Iy)	1.32 cm⁴	0.03 in⁴
Elastic section modulus (Sx)	1.36 cm³	0.083 in³
Elastic section modulus (Sy)	1.05 cm³	0.064 in³
Plastic section modulus (Zx)	1.65 cm³	0.100 in³
Plastic section modulus (Zy)	1.19 cm³	0.073 in³
Radius of gyration (rx)	1.48 cm	0.584 in
Radius of gyration (ry)	1.03 cm	0.407 in