W 921 x 387,5 IMCA · Weight & Dimensions

IMCA, 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 921 x 387,5 (México) · Doble T 921 x 387,5 (Argentina / LATAM) · UB 921 (UK / Australia)

The W 921 x 387,5 steel profile weighs 387.5 kg/m (260.39 lb/ft), has a depth of 921 mm (36.26 in), flange width 420 mm (16.54 in). Cross-sectional area: 48,802.14 mm². Moment of inertia Ix = 709,676.921 cm⁴, Iy = 45,261.953 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	921 mm	36.26 in
Width (b)	420 mm	16.54 in
Web thickness (tw)	21.3 mm	0.84 in
Flange thickness (tf)	36.6 mm	1.44 in
Weight	387.5 kg/m	260.39 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	48,802.14 mm²	75.643 in²
Moment of inertia (Ix)	709,676.92 cm⁴	17049.99 in⁴
Moment of inertia (Iy)	45,261.95 cm⁴	1087.42 in⁴
Elastic section modulus (Sx)	15,411.01 cm³	940.441 in³
Elastic section modulus (Sy)	2,155.33 cm³	131.527 in³
Plastic section modulus (Zx)	17,422.42 cm³	1063.186 in³
Plastic section modulus (Zy)	3,324.28 cm³	202.861 in³
Radius of gyration (rx)	38.13 cm	15.013 in
Radius of gyration (ry)	9.63 cm	3.792 in