W 310 x 21,0 Gerdau · Weight & Dimensions

Gerdau · 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 21,0 (México) · Doble T 310 x 21,0 (Argentina / LATAM) · UB 303 (UK / Australia)

The W 310 x 21,0 steel profile weighs 21.0 kg/m (14.11 lb/ft), has a depth of 303 mm (11.93 in), flange width 101 mm (3.98 in). Cross-sectional area: 2,724.401 mm². Moment of inertia Ix = 3,775.283 cm⁴, Iy = 98.428 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	303 mm	11.93 in
Width (b)	101 mm	3.98 in
Web thickness (tw)	5.1 mm	0.20 in
Flange thickness (tf)	5.7 mm	0.22 in
Fillet radius (r)	10 mm	0.39 in
Weight	21.0 kg/m	14.11 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	2,724.4 mm²	4.223 in²
Moment of inertia (Ix)	3,775.28 cm⁴	90.70 in⁴
Moment of inertia (Iy)	98.43 cm⁴	2.36 in⁴
Elastic section modulus (Sx)	249.19 cm³	15.207 in³
Elastic section modulus (Sy)	19.49 cm³	1.189 in³
Plastic section modulus (Zx)	291.89 cm³	17.813 in³
Plastic section modulus (Zy)	31.38 cm³	1.915 in³
Radius of gyration (rx)	11.77 cm	4.635 in
Radius of gyration (ry)	1.9 cm	0.748 in