I 1778x406.4x11.1x34.9 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 1778x406.4x11.1x34.9 (México) · Doble T I 1778x406.4x11.1x34.9 (Argentina / LATAM) · UB 1778 (UK / Australia)

The I 1778x406.4x11.1x34.9 steel profile weighs 371.5 kg/m (249.66 lb/ft), has a depth of 1778 mm (70.00 in), flange width 406.4 mm (16.00 in). Cross-sectional area: 47,327.74 mm². Moment of inertia Ix = 2,616,082.747 cm⁴, Iy = 39,061.757 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)	34.9 mm	1.37 in
Weight	371.5 kg/m	249.66 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	47,327.74 mm²	73.358 in²
Moment of inertia (Ix)	2,616,082.75 cm⁴	62851.39 in⁴
Moment of inertia (Iy)	39,061.76 cm⁴	938.46 in⁴
Elastic section modulus (Sx)	29,427.25 cm³	1795.769 in³
Elastic section modulus (Sy)	1,922.33 cm³	117.308 in³
Plastic section modulus (Zx)	32,820.32 cm³	2002.827 in³
Plastic section modulus (Zy)	2,934.68 cm³	179.086 in³
Radius of gyration (rx)	74.35 cm	29.271 in
Radius of gyration (ry)	9.08 cm	3.577 in