#11 (No. 11) Reinforcing Bar - ASTM (US)

#11 (No. 11) is a ASTM (US) reinforcing bar to ASTM A615 / A706 (Table 1). Its nominal diameter is 1.41 in (35.8 mm), giving a cross-section area As of 1.56 in² (1006 mm²) and a mass of 5.313 lb/ft (7.907 kg/m). It is supplied in grade Gr.60 / Gr.75 / Gr.80 with characteristic yield f_yk = 420 MPa. The tables below give the total steel area for 1-10 bars and the area per foot of width at common bar spacings.

Area As: 1.56 in² (1006 mm²)
Diameter: 1.41 in (35.8 mm)
Mass: 5.313 lb/ft (7.907 kg/m)
f_yk: 420 MPa

Bar properties

d	Nominal diameter	1.41 in / 35.8 mm
As	Cross-section area	1.56 in² / 1006 mm²
m	Mass per metre	5.313 lb/ft / 7.907 kg/m
u	Nominal perimeter	112.5 mm
f_yk	Characteristic yield	420 MPa

Total area for n bars (As = n × 1.56 in²)

Bars	1	2	3	4	5	6	7	8	9	10
As (in²)	1.56	3.12	4.68	6.24	7.80	9.36	10.92	12.48	14.04	15.60

Area per foot at spacing (As/ft = 12/s × 1.56 in²)

s (in)	3	4	5	6	8	10	12	18
As/ft (in²/ft)	6.24	4.68	3.74	3.12	2.34	1.87	1.56	1.04

Source: ASTM A615 / A706 (Table 1). Area = π/4 × d² for metric bars; ASTM areas are the standard's tabulated nominal values. Grades available: Gr.60, Gr.75, Gr.80.

Other ASTM (US) bar sizes

#3 (No. 3)#4 (No. 4)#5 (No. 5)#6 (No. 6)#7 (No. 7)#8 (No. 8)#9 (No. 9)#10 (No. 10)#14 (No. 14)#18 (No. 18)

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