SHS 18x18x1 Hiasa · Weight & Dimensions

Hiasa, cold-formed sections · Square Hollow Section

Square Hollow Sections (SHS) are tubular profiles with equal sides, ideal for columns and compression members due to their uniform buckling resistance in all directions.

Also known as: PTR 18x18 cal 18 (México) · Caño estructural 18x18 (Argentina)

The SHS 18x18x1 steel profile weighs 0.5 kg/m (0.34 lb/ft), has a depth of 18 mm (0.71 in), flange width 18 mm (0.71 in). Cross-sectional area: 65.425 mm². Moment of inertia Ix = 0.309 cm⁴, Iy = 0.309 cm⁴.

Cross-section (not to scale)

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

Dimensions

Property	Metric	Imperial
Depth (h)	18 mm	0.71 in
Width (b)	18 mm	0.71 in
Thickness (t)	1 mm	0.04 in
Fillet radius (r)	2 mm	0.08 in
Weight	0.5 kg/m	0.34 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	65.42 mm²	0.101 in²
Moment of inertia (Ix)	0.31 cm⁴	0.01 in⁴
Moment of inertia (Iy)	0.31 cm⁴	0.01 in⁴
Elastic section modulus (Sx)	0.34 cm³	0.021 in³
Elastic section modulus (Sy)	0.34 cm³	0.021 in³
Plastic section modulus (Zx)	0.41 cm³	0.025 in³
Plastic section modulus (Zy)	0.41 cm³	0.025 in³
Radius of gyration (rx)	0.69 cm	0.270 in
Radius of gyration (ry)	0.69 cm	0.270 in