W 310 x 31,0 CISC · Weight & Dimensions

CISC, 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 31,0 (México) · Doble T 310 x 31,0 (Argentina / LATAM) · UB 306 (UK / Australia)

The W 310 x 31,0 steel profile weighs 31.6 kg/m (21.21 lb/ft), has a depth of 306 mm (12.05 in), flange width 164 mm (6.46 in). Cross-sectional area: 4,028.271 mm². Moment of inertia Ix = 6,735.813 cm⁴, Iy = 544.83 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	306 mm	12.05 in
Width (b)	164 mm	6.46 in
Web thickness (tw)	5 mm	0.20 in
Flange thickness (tf)	7.4 mm	0.29 in
Fillet radius (r)	13 mm	0.51 in
Weight	31.6 kg/m	21.21 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	4,028.27 mm²	6.244 in²
Moment of inertia (Ix)	6,735.81 cm⁴	161.83 in⁴
Moment of inertia (Iy)	544.83 cm⁴	13.09 in⁴
Elastic section modulus (Sx)	440.25 cm³	26.866 in³
Elastic section modulus (Sy)	66.44 cm³	4.055 in³
Plastic section modulus (Zx)	489.08 cm³	29.846 in³
Plastic section modulus (Zy)	102.12 cm³	6.232 in³
Radius of gyration (rx)	12.93 cm	5.091 in
Radius of gyration (ry)	3.68 cm	1.448 in