W 100 x 8,1 SAISC · Weight & Dimensions

SAISC, hot-rolled sections · Wide Flange (I-beam)

Wide flange beams (W shapes / I-beams) are the most common structural steel profile used in building construction. They are used for beams, columns, and girders in steel-framed buildings and bridges. Designed per AISC 360, Eurocode 3, and NBR 8800.

Also known as: IPR 100 x 8,1 (México) · Doble T 100 x 8,1 (Argentina / LATAM) · UB 100 (UK / Australia)

The W 100 x 8,1 steel profile weighs 8.1 kg/m (5.44 lb/ft), has a depth of 100 mm (3.94 in), flange width 55 mm (2.17 in). Cross-sectional area: 1,032.322 mm². Moment of inertia Ix = 171.012 cm⁴, Iy = 15.919 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	100 mm	3.94 in
Width (b)	55 mm	2.17 in
Web thickness (tw)	4.1 mm	0.16 in
Flange thickness (tf)	5.7 mm	0.22 in
Fillet radius (r)	7 mm	0.28 in
Weight	8.1 kg/m	5.44 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	1,032.32 mm²	1.600 in²
Moment of inertia (Ix)	171.01 cm⁴	4.11 in⁴
Moment of inertia (Iy)	15.92 cm⁴	0.38 in⁴
Elastic section modulus (Sx)	34.2 cm³	2.087 in³
Elastic section modulus (Sy)	5.79 cm³	0.353 in³
Plastic section modulus (Zx)	39.41 cm³	2.405 in³
Plastic section modulus (Zy)	9.15 cm³	0.558 in³
Radius of gyration (rx)	4.07 cm	1.602 in
Radius of gyration (ry)	1.24 cm	0.489 in