W 840 x 299,0 CISC · Weight & Dimensions

CISC, 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 840 x 299,0 (México) · Doble T 840 x 299,0 (Argentina / LATAM) · UB 855 (UK / Australia)

The W 840 x 299,0 steel profile weighs 299.1 kg/m (200.99 lb/ft), has a depth of 855 mm (33.66 in), flange width 400 mm (15.75 in). Cross-sectional area: 38,136.244 mm². Moment of inertia Ix = 479,413.617 cm⁴, Iy = 31,191.791 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	855 mm	33.66 in
Width (b)	400 mm	15.75 in
Web thickness (tw)	18.2 mm	0.72 in
Flange thickness (tf)	29.2 mm	1.15 in
Fillet radius (r)	18 mm	0.71 in
Weight	299.1 kg/m	200.99 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	38,136.24 mm²	59.111 in²
Moment of inertia (Ix)	479,413.62 cm⁴	11517.91 in⁴
Moment of inertia (Iy)	31,191.79 cm⁴	749.38 in⁴
Elastic section modulus (Sx)	11,214.35 cm³	684.345 in³
Elastic section modulus (Sy)	1,559.59 cm³	95.172 in³
Plastic section modulus (Zx)	12,642.3 cm³	771.484 in³
Plastic section modulus (Zy)	2,405.62 cm³	146.800 in³
Radius of gyration (rx)	35.46 cm	13.959 in
Radius of gyration (ry)	9.04 cm	3.561 in