I 1270x508x12.7x34.9 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 1270x508x12.7x34.9 (México) · Doble T I 1270x508x12.7x34.9 (Argentina / LATAM) · UB 1270 (UK / Australia)

The I 1270x508x12.7x34.9 steel profile weighs 398.5 kg/m (267.77 lb/ft), has a depth of 1270 mm (50.00 in), flange width 508 mm (20.00 in). Cross-sectional area: 50,700.94 mm². Moment of inertia Ix = 1,535,601.279 cm⁴, Iy = 76,274.958 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	1270 mm	50.00 in
Width (b)	508 mm	20.00 in
Web thickness (tw)	12.7 mm	0.50 in
Flange thickness (tf)	34.9 mm	1.37 in
Weight	398.5 kg/m	267.77 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	50,700.94 mm²	78.586 in²
Moment of inertia (Ix)	1,535,601.28 cm⁴	36892.82 in⁴
Moment of inertia (Iy)	76,274.96 cm⁴	1832.51 in⁴
Elastic section modulus (Sx)	24,182.7 cm³	1475.725 in³
Elastic section modulus (Sy)	3,002.95 cm³	183.252 in³
Plastic section modulus (Zx)	26,470.86 cm³	1615.358 in³
Plastic section modulus (Zy)	4,551.61 cm³	277.758 in³
Radius of gyration (rx)	55.03 cm	21.667 in
Radius of gyration (ry)	12.27 cm	4.829 in