I 1778x508x12.7x38.1 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 1778x508x12.7x38.1 (México) · Doble T I 1778x508x12.7x38.1 (Argentina / LATAM) · UB 1778 (UK / Australia)

The I 1778x508x12.7x38.1 steel profile weighs 473.5 kg/m (318.21 lb/ft), has a depth of 1778 mm (70.00 in), flange width 508 mm (20.00 in). Cross-sectional area: 60,322.46 mm². Moment of inertia Ix = 3,451,673.672 cm⁴, Iy = 83,275.335 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)	38.1 mm	1.50 in
Weight	473.5 kg/m	318.21 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	60,322.46 mm²	93.500 in²
Moment of inertia (Ix)	3,451,673.67 cm⁴	82926.46 in⁴
Moment of inertia (Iy)	83,275.33 cm⁴	2000.69 in⁴
Elastic section modulus (Sx)	38,826.48 cm³	2369.347 in³
Elastic section modulus (Sy)	3,278.56 cm³	200.071 in³
Plastic section modulus (Zx)	42,870.61 cm³	2616.136 in³
Plastic section modulus (Zy)	4,984.74 cm³	304.189 in³
Radius of gyration (rx)	75.64 cm	29.781 in
Radius of gyration (ry)	11.75 cm	4.626 in