W 310 x 129,8 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 310 x 129,8 (México) · Doble T 310 x 129,8 (Argentina / LATAM) · UB 310 (UK / Australia)

The W 310 x 129,8 steel profile weighs 129.8 kg/m (87.20 lb/ft), has a depth of 310 mm (12.20 in), flange width 305 mm (12.01 in). Cross-sectional area: 16,528.124 mm². Moment of inertia Ix = 28,628.997 cm⁴, Iy = 9,469.144 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	310 mm	12.20 in
Width (b)	305 mm	12.01 in
Web thickness (tw)	15 mm	0.59 in
Flange thickness (tf)	20 mm	0.79 in
Fillet radius (r)	18 mm	0.71 in
Weight	129.8 kg/m	87.20 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	16,528.12 mm²	25.619 in²
Moment of inertia (Ix)	28,629 cm⁴	687.81 in⁴
Moment of inertia (Iy)	9,469.14 cm⁴	227.50 in⁴
Elastic section modulus (Sx)	1,847.03 cm³	112.713 in³
Elastic section modulus (Sy)	620.93 cm³	37.891 in³
Plastic section modulus (Zx)	2,078.8 cm³	126.857 in³
Plastic section modulus (Zy)	948.64 cm³	57.890 in³
Radius of gyration (rx)	13.16 cm	5.182 in
Radius of gyration (ry)	7.57 cm	2.980 in