I 1778x508x12.7x28.6 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 1778x508x12.7x28.6 (México) · Doble T I 1778x508x12.7x28.6 (Argentina / LATAM) · UB 1778 (UK / Australia)

The I 1778x508x12.7x28.6 steel profile weighs 399.7 kg/m (268.57 lb/ft), has a depth of 1778 mm (70.00 in), flange width 508 mm (20.00 in). Cross-sectional area: 50,911.76 mm². Moment of inertia Ix = 2,762,674.5 cm⁴, Iy = 62,518.711 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	1778 mm	70.00 in
Width (b)	508 mm	20.00 in
Web thickness (tw)	12.7 mm	0.50 in
Flange thickness (tf)	28.6 mm	1.13 in
Weight	399.7 kg/m	268.57 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	50,911.76 mm²	78.913 in²
Moment of inertia (Ix)	2,762,674.5 cm⁴	66373.25 in⁴
Moment of inertia (Iy)	62,518.71 cm⁴	1502.01 in⁴
Elastic section modulus (Sx)	31,076.2 cm³	1896.394 in³
Elastic section modulus (Sy)	2,461.37 cm³	150.202 in³
Plastic section modulus (Zx)	34,818.34 cm³	2124.755 in³
Plastic section modulus (Zy)	3,759.7 cm³	229.432 in³
Radius of gyration (rx)	73.66 cm	29.002 in
Radius of gyration (ry)	11.08 cm	4.363 in