RHS 100x50x4.5 SAISC · Weight & Dimensions

SAISC, 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 100x50 cal 6 (México) · Caño estructural 100x50 (Argentina)

The RHS 100x50x4.5 steel profile weighs 9.6 kg/m (6.42 lb/ft), has a depth of 100 mm (3.94 in), flange width 50 mm (1.97 in). Cross-sectional area: 1,216.852 mm². Moment of inertia Ix = 146.606 cm⁴, Iy = 48.869 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.5 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	50 mm	1.97 in
Thickness (t)	4.5 mm	0.18 in
Fillet radius (r)	9 mm	0.35 in
Weight	9.6 kg/m	6.42 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,216.85 mm²	1.886 in²
Moment of inertia (Ix)	146.61 cm⁴	3.52 in⁴
Moment of inertia (Iy)	48.87 cm⁴	1.17 in⁴
Elastic section modulus (Sx)	29.32 cm³	1.789 in³
Elastic section modulus (Sy)	19.55 cm³	1.193 in³
Plastic section modulus (Zx)	37.56 cm³	2.292 in³
Plastic section modulus (Zy)	23 cm³	1.403 in³
Radius of gyration (rx)	3.47 cm	1.367 in
Radius of gyration (ry)	2 cm	0.789 in