I 1778x406.4x11.1x15.9 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 1778x406.4x11.1x15.9 (México) · Doble T I 1778x406.4x11.1x15.9 (Argentina / LATAM) · UB 1778 (UK / Australia)

The I 1778x406.4x11.1x15.9 steel profile weighs 253.6 kg/m (170.42 lb/ft), has a depth of 1778 mm (70.00 in), flange width 406.4 mm (16.00 in). Cross-sectional area: 32,306.34 mm². Moment of inertia Ix = 1,495,734.095 cm⁴, Iy = 17,807.076 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)	15.9 mm	0.63 in
Weight	253.6 kg/m	170.42 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	32,306.34 mm²	50.075 in²
Moment of inertia (Ix)	1,495,734.1 cm⁴	35935.01 in⁴
Moment of inertia (Iy)	17,807.08 cm⁴	427.82 in⁴
Elastic section modulus (Sx)	16,824.91 cm³	1026.723 in³
Elastic section modulus (Sy)	876.33 cm³	53.477 in³
Plastic section modulus (Zx)	19,847.84 cm³	1211.194 in³
Plastic section modulus (Zy)	1,366.82 cm³	83.409 in³
Radius of gyration (rx)	68.04 cm	26.789 in
Radius of gyration (ry)	7.42 cm	2.923 in