W 320 x 136,6 SAISC · Weight & Dimensions

SAISC, 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 320 x 136,6 (México) · Doble T 320 x 136,6 (Argentina / LATAM) · UB 320.5 (UK / Australia)

The W 320 x 136,6 steel profile weighs 136.6 kg/m (91.79 lb/ft), has a depth of 320.5 mm (12.62 in), flange width 308.7 mm (12.15 in). Cross-sectional area: 17,419.886 mm². Moment of inertia Ix = 32,765.745 cm⁴, Iy = 10,647.762 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	320.5 mm	12.62 in
Width (b)	308.7 mm	12.15 in
Web thickness (tw)	13.8 mm	0.54 in
Flange thickness (tf)	21.7 mm	0.85 in
Fillet radius (r)	15.2 mm	0.60 in
Weight	136.6 kg/m	91.79 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	17,419.89 mm²	27.001 in²
Moment of inertia (Ix)	32,765.74 cm⁴	787.20 in⁴
Moment of inertia (Iy)	10,647.76 cm⁴	255.81 in⁴
Elastic section modulus (Sx)	2,044.66 cm³	124.774 in³
Elastic section modulus (Sy)	689.85 cm³	42.097 in³
Plastic section modulus (Zx)	2,293.31 cm³	139.947 in³
Plastic section modulus (Zy)	1,049.19 cm³	64.026 in³
Radius of gyration (rx)	13.71 cm	5.399 in
Radius of gyration (ry)	7.82 cm	3.078 in