W 691 x 129,3 GOST · Weight & Dimensions

GOST, 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 691 x 129,3 (México) · Doble T 691 x 129,3 (Argentina / LATAM) · UB 691 (UK / Australia)

The W 691 x 129,3 steel profile weighs 129.3 kg/m (86.88 lb/ft), has a depth of 691 mm (27.20 in), flange width 260 mm (10.24 in). Cross-sectional area: 16,226.443 mm². Moment of inertia Ix = 123,233.448 cm⁴, Iy = 4,410.901 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	691 mm	27.20 in
Width (b)	260 mm	10.24 in
Web thickness (tw)	12 mm	0.47 in
Flange thickness (tf)	15 mm	0.59 in
Fillet radius (r)	24 mm	0.94 in
Weight	129.3 kg/m	86.88 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	16,226.44 mm²	25.151 in²
Moment of inertia (Ix)	123,233.45 cm⁴	2960.68 in⁴
Moment of inertia (Iy)	4,410.9 cm⁴	105.97 in⁴
Elastic section modulus (Sx)	3,566.81 cm³	217.661 in³
Elastic section modulus (Sy)	339.3 cm³	20.705 in³
Plastic section modulus (Zx)	4,107.93 cm³	250.682 in³
Plastic section modulus (Zy)	536.41 cm³	32.734 in³
Radius of gyration (rx)	27.56 cm	10.850 in
Radius of gyration (ry)	5.21 cm	2.053 in