RHS 100x80x4.5 V&M do Brasil · Weight & Dimensions

V&M do Brasil, hot-rolled 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 100x80 cal 6 (México) · Caño estructural 100x80 (Argentina)

The RHS 100x80x4.5 steel profile weighs 11.7 kg/m (7.84 lb/ft), has a depth of 100 mm (3.94 in), flange width 80 mm (3.15 in). Cross-sectional area: 1,486.852 mm². Moment of inertia Ix = 208.214 cm⁴, Iy = 147.266 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)	80 mm	3.15 in
Thickness (t)	4.5 mm	0.18 in
Fillet radius (r)	9 mm	0.35 in
Weight	11.7 kg/m	7.84 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,486.85 mm²	2.305 in²
Moment of inertia (Ix)	208.21 cm⁴	5.00 in⁴
Moment of inertia (Iy)	147.27 cm⁴	3.54 in⁴
Elastic section modulus (Sx)	41.64 cm³	2.541 in³
Elastic section modulus (Sy)	36.82 cm³	2.247 in³
Plastic section modulus (Zx)	50.45 cm³	3.079 in³
Plastic section modulus (Zy)	43.28 cm³	2.641 in³
Radius of gyration (rx)	3.74 cm	1.473 in
Radius of gyration (ry)	3.15 cm	1.239 in