I 1778x406.4x11.1x25.4 AHMSA · Weight & Dimensions

AHMSA, welded 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: I 1778x406.4x11.1x25.4 (México) · Doble T I 1778x406.4x11.1x25.4 (Argentina / LATAM) · UB 1778 (UK / Australia)

The I 1778x406.4x11.1x25.4 steel profile weighs 312.6 kg/m (210.04 lb/ft), has a depth of 1778 mm (70.00 in), flange width 406.4 mm (16.00 in). Cross-sectional area: 39,817.04 mm². Moment of inertia Ix = 2,062,070.35 cm⁴, Iy = 28,434.417 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	1778 mm	70.00 in
Width (b)	406.4 mm	16.00 in
Web thickness (tw)	11.1 mm	0.44 in
Flange thickness (tf)	25.4 mm	1.00 in
Weight	312.6 kg/m	210.04 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	39,817.04 mm²	61.716 in²
Moment of inertia (Ix)	2,062,070.35 cm⁴	49541.24 in⁴
Moment of inertia (Iy)	28,434.42 cm⁴	683.14 in⁴
Elastic section modulus (Sx)	23,195.39 cm³	1415.476 in³
Elastic section modulus (Sy)	1,399.33 cm³	85.393 in³
Plastic section modulus (Zx)	26,369.75 cm³	1609.188 in³
Plastic section modulus (Zy)	2,150.75 cm³	131.247 in³
Radius of gyration (rx)	71.96 cm	28.332 in
Radius of gyration (ry)	8.45 cm	3.327 in