I 685.8x203.2x7.9x9.5 AHMSA · Weight & Dimensions

AHMSA, welded 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: I 685.8x203.2x7.9x9.5 (México) · Doble T I 685.8x203.2x7.9x9.5 (Argentina / LATAM) · UB 685.8 (UK / Australia)

The I 685.8x203.2x7.9x9.5 steel profile weighs 71.7 kg/m (48.16 lb/ft), has a depth of 685.8 mm (27.00 in), flange width 203.2 mm (8.00 in). Cross-sectional area: 9,128.52 mm². Moment of inertia Ix = 63,667.263 cm⁴, Iy = 1,331.184 cm⁴.

Cross-section (not to scale)

Dimensions

Property	Metric	Imperial
Depth (h)	685.8 mm	27.00 in
Width (b)	203.2 mm	8.00 in
Web thickness (tw)	7.9 mm	0.31 in
Flange thickness (tf)	9.5 mm	0.37 in
Weight	71.7 kg/m	48.16 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	9,128.52 mm²	14.149 in²
Moment of inertia (Ix)	63,667.26 cm⁴	1529.61 in⁴
Moment of inertia (Iy)	1,331.18 cm⁴	31.98 in⁴
Elastic section modulus (Sx)	1,856.73 cm³	113.305 in³
Elastic section modulus (Sy)	131.02 cm³	7.995 in³
Plastic section modulus (Zx)	2,183.66 cm³	133.256 in³
Plastic section modulus (Zy)	206.53 cm³	12.603 in³
Radius of gyration (rx)	26.41 cm	10.397 in
Radius of gyration (ry)	3.82 cm	1.503 in