W 488 x 128,3 KS · Weight & Dimensions

KS, hot-rolled 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: IPR 488 x 128,3 (México) · Doble T 488 x 128,3 (Argentina / LATAM) · UB 488 (UK / Australia)

The W 488 x 128,3 steel profile weighs 128.3 kg/m (86.25 lb/ft), has a depth of 488 mm (19.21 in), flange width 300 mm (11.81 in). Cross-sectional area: 16,352.283 mm². Moment of inertia Ix = 70,952.022 cm⁴, Iy = 8,113.812 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	488 mm	19.21 in
Width (b)	300 mm	11.81 in
Web thickness (tw)	11 mm	0.43 in
Flange thickness (tf)	18 mm	0.71 in
Fillet radius (r)	26 mm	1.02 in
Weight	128.3 kg/m	86.25 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	16,352.28 mm²	25.346 in²
Moment of inertia (Ix)	70,952.02 cm⁴	1704.62 in⁴
Moment of inertia (Iy)	8,113.81 cm⁴	194.93 in⁴
Elastic section modulus (Sx)	2,907.87 cm³	177.450 in³
Elastic section modulus (Sy)	540.92 cm³	33.009 in³
Plastic section modulus (Zx)	3,227.61 cm³	196.962 in³
Plastic section modulus (Zy)	830.23 cm³	50.664 in³
Radius of gyration (rx)	20.83 cm	8.201 in
Radius of gyration (ry)	7.04 cm	2.773 in