SHS 50x50x3.9 Açotubo · Weight & Dimensions

Açotubo, 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 50x50 cal 8 (México) · Caño estructural 50x50 (Argentina)

The SHS 50x50x3.9 steel profile weighs 5.3 kg/m (3.59 lb/ft), has a depth of 50 mm (1.97 in), flange width 50 mm (1.97 in). Cross-sectional area: 679.991 mm². Moment of inertia Ix = 23.354 cm⁴, Iy = 23.354 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.9 mm ≈ 9 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	50 mm	1.97 in
Width (b)	50 mm	1.97 in
Thickness (t)	3.9 mm	0.15 in
Fillet radius (r)	7.8 mm	0.31 in
Weight	5.3 kg/m	3.59 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	679.99 mm²	1.054 in²
Moment of inertia (Ix)	23.35 cm⁴	0.56 in⁴
Moment of inertia (Iy)	23.35 cm⁴	0.56 in⁴
Elastic section modulus (Sx)	9.34 cm³	0.570 in³
Elastic section modulus (Sy)	9.34 cm³	0.570 in³
Plastic section modulus (Zx)	11.51 cm³	0.702 in³
Plastic section modulus (Zy)	11.51 cm³	0.702 in³
Radius of gyration (rx)	1.85 cm	0.730 in
Radius of gyration (ry)	1.85 cm	0.730 in