RHS 88.9x63.5x6.35 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 88.9x63.5 cal 3 (México) · Caño estructural 88.9x63.5 (Argentina)

The RHS 88.9x63.5x6.35 steel profile weighs 13.1 kg/m (8.81 lb/ft), has a depth of 88.9 mm (3.50 in), flange width 63.5 mm (2.50 in). Cross-sectional area: 1,670.351 mm². Moment of inertia Ix = 165.094 cm⁴, Iy = 96.785 cm⁴.

Cross-section (not to scale)

Gauge equivalent: 6.35 mm ≈ 3 gauge (Manufacturers Standard Gage)

Dimensions

Property	Metric	Imperial
Depth (h)	88.9 mm	3.50 in
Width (b)	63.5 mm	2.50 in
Thickness (t)	6.3 mm	0.25 in
Fillet radius (r)	12.7 mm	0.50 in
Weight	13.1 kg/m	8.81 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,670.35 mm²	2.589 in²
Moment of inertia (Ix)	165.09 cm⁴	3.97 in⁴
Moment of inertia (Iy)	96.79 cm⁴	2.33 in⁴
Elastic section modulus (Sx)	37.14 cm³	2.267 in³
Elastic section modulus (Sy)	30.48 cm³	1.860 in³
Plastic section modulus (Zx)	47.23 cm³	2.882 in³
Plastic section modulus (Zy)	37.28 cm³	2.275 in³
Radius of gyration (rx)	3.14 cm	1.238 in
Radius of gyration (ry)	2.41 cm	0.948 in