10 mm Reinforcing Bar - EN / Eurocode

10 mm is a EN / Eurocode reinforcing bar to EN 10080 / EN 1992-1-1. Its nominal diameter is 10 mm, giving a cross-section area As of 78.5 mm² and a mass of 0.617 kg/m. It is supplied in grade B500A / B500B / B500C with characteristic yield f_yk = 500 MPa. The tables below give the total steel area for 1-10 bars and the area per metre of width at common bar spacings.

Area As: 78.5 mm²
Diameter: 10 mm
Mass: 0.617 kg/m
f_yk: 500 MPa

Bar properties

d	Nominal diameter	10 mm
As	Cross-section area	78.5 mm²
m	Mass per metre	0.617 kg/m
u	Nominal perimeter	31.4 mm
f_yk	Characteristic yield	500 MPa

Total area for n bars (As = n × 78.5 mm²)

Bars	1	2	3	4	5	6	7	8	9	10
As (mm²)	79	157	236	314	393	471	550	628	707	785

Area per metre at spacing (As/m = 1000/s × 78.5 mm²)

s (mm)	75	100	125	150	175	200	250	300
As/m (mm²/m)	1,047	785	628	523	449	393	314	262

Source: EN 10080 / EN 1992-1-1. Area = π/4 × d² for metric bars; ASTM areas are the standard's tabulated nominal values. Grades available: B500A, B500B, B500C.

Other EN / Eurocode bar sizes

6 mm 8 mm 12 mm 14 mm 16 mm 20 mm 25 mm 28 mm 32 mm 40 mm

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