RHS 100x75x3.75 Tecnometal · Weight & Dimensions

Tecnometal, cold-formed sections (Brazil) · 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 100x75 cal 8 (México) · Caño estructural 100x75 (Argentina)

The RHS 100x75x3.75 steel profile weighs 9.6 kg/m (6.44 lb/ft), has a depth of 100 mm (3.94 in), flange width 75 mm (2.95 in). Cross-sectional area: 1,220.036 mm². Moment of inertia Ix = 171.012 cm⁴, Iy = 109.597 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 3.75 mm ≈ 9 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	75 mm	2.95 in
Thickness (t)	3.8 mm	0.15 in
Fillet radius (r)	7.5 mm	0.30 in
Weight	9.6 kg/m	6.44 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,220.04 mm²	1.891 in²
Moment of inertia (Ix)	171.01 cm⁴	4.11 in⁴
Moment of inertia (Iy)	109.6 cm⁴	2.63 in⁴
Elastic section modulus (Sx)	34.2 cm³	2.087 in³
Elastic section modulus (Sy)	29.23 cm³	1.783 in³
Plastic section modulus (Zx)	41.33 cm³	2.522 in³
Plastic section modulus (Zy)	33.93 cm³	2.070 in³
Radius of gyration (rx)	3.74 cm	1.474 in
Radius of gyration (ry)	3 cm	1.180 in