RHS 177.8x127x4.78 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 177.8x127 cal 6 (México) · Caño estructural 177.8x127 (Argentina)

The RHS 177.8x127x4.78 steel profile weighs 21.7 kg/m (14.58 lb/ft), has a depth of 177.8 mm (7.00 in), flange width 127 mm (5.00 in). Cross-sectional area: 2,763.655 mm². Moment of inertia Ix = 1,242.692 cm⁴, Iy = 741.084 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 4.78 mm ≈ 7 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	177.8 mm	7.00 in
Width (b)	127 mm	5.00 in
Thickness (t)	4.8 mm	0.19 in
Fillet radius (r)	9.6 mm	0.38 in
Weight	21.7 kg/m	14.58 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,763.65 mm²	4.284 in²
Moment of inertia (Ix)	1,242.69 cm⁴	29.86 in⁴
Moment of inertia (Iy)	741.08 cm⁴	17.80 in⁴
Elastic section modulus (Sx)	139.79 cm³	8.530 in³
Elastic section modulus (Sy)	116.71 cm³	7.122 in³
Plastic section modulus (Zx)	167.5 cm³	10.222 in³
Plastic section modulus (Zy)	133.15 cm³	8.126 in³
Radius of gyration (rx)	6.71 cm	2.640 in
Radius of gyration (ry)	5.18 cm	2.039 in