RHS 101.6x50.8x3.81 CISC · Weight & Dimensions

CISC, 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 101.6x50.8 cal 8 (México) · Caño estructural 101.6x50.8 (Argentina)

The RHS 101.6x50.8x3.81 steel profile weighs 8.4 kg/m (5.62 lb/ft), has a depth of 101.6 mm (4.00 in), flange width 50.8 mm (2.00 in). Cross-sectional area: 1,065.841 mm². Moment of inertia Ix = 135.927 cm⁴, Iy = 45.67 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.81 mm ≈ 9 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	101.6 mm	4.00 in
Width (b)	50.8 mm	2.00 in
Thickness (t)	3.8 mm	0.15 in
Fillet radius (r)	7.6 mm	0.30 in
Weight	8.4 kg/m	5.62 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,065.84 mm²	1.652 in²
Moment of inertia (Ix)	135.93 cm⁴	3.27 in⁴
Moment of inertia (Iy)	45.67 cm⁴	1.10 in⁴
Elastic section modulus (Sx)	26.76 cm³	1.633 in³
Elastic section modulus (Sy)	17.98 cm³	1.097 in³
Plastic section modulus (Zx)	33.88 cm³	2.068 in³
Plastic section modulus (Zy)	20.82 cm³	1.270 in³
Radius of gyration (rx)	3.57 cm	1.406 in
Radius of gyration (ry)	2.07 cm	0.815 in