W 840 x 392,0 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 392,0 (México) · Doble T 840 x 392,0 (Argentina / LATAM) · UB 877 (UK / Australia)

The W 840 x 392,0 steel profile weighs 391.7 kg/m (263.24 lb/ft), has a depth of 877 mm (34.53 in), flange width 401 mm (15.79 in). Cross-sectional area: 49,896.044 mm². Moment of inertia Ix = 658,647.382 cm⁴, Iy = 42,958.34 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	877 mm	34.53 in
Width (b)	401 mm	15.79 in
Web thickness (tw)	22.1 mm	0.87 in
Flange thickness (tf)	39.9 mm	1.57 in
Fillet radius (r)	18 mm	0.71 in
Weight	391.7 kg/m	263.24 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	49,896.04 mm²	77.339 in²
Moment of inertia (Ix)	658,647.38 cm⁴	15824.00 in⁴
Moment of inertia (Iy)	42,958.34 cm⁴	1032.07 in⁴
Elastic section modulus (Sx)	15,020.46 cm³	916.609 in³
Elastic section modulus (Sy)	2,142.56 cm³	130.748 in³
Plastic section modulus (Zx)	17,014.55 cm³	1038.296 in³
Plastic section modulus (Zy)	3,309.51 cm³	201.960 in³
Radius of gyration (rx)	36.33 cm	14.304 in
Radius of gyration (ry)	9.28 cm	3.653 in