Barra 8mm · Weight & Dimensions

BR — Round Bar

Round bars are solid circular sections used for bracing rods, ties, anchor bolts, and secondary structural elements.

The Barra 8mm steel profile weighs 0.4 kg/m (0.27 lb/ft). Cross-sectional area: 50.3 mm². Moment of inertia Ix = 0.02 cm⁴, Iy = 0.02 cm⁴.

Cross-section (not to scale)

Imperial equivalent: Ø8 mm = 5/16" (fractional inch diameter)

Dimensions

Property	Metric	Imperial
Diameter (d)	8 mm	0.31 in
Weight	0.4 kg/m	0.27 lb/ft

Section Properties

Property	Metric	Imperial
Area (A)	50.3 mm²	0.078 in²
Moment of inertia (Ix)	0.02 cm⁴	0.00 in⁴
Moment of inertia (Iy)	0.02 cm⁴	0.00 in⁴
Elastic section modulus (Sx)	0.05 cm³	0.003 in³
Elastic section modulus (Sy)	0.05 cm³	0.003 in³
Plastic section modulus (Zx)	0.09 cm³	0.005 in³
Plastic section modulus (Zy)	0.09 cm³	0.005 in³
Radius of gyration (rx)	0.2 cm	0.079 in
Radius of gyration (ry)	0.2 cm	0.079 in