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rebar bending shape code

BS 8666:2005: Scheduling, dimensioning, bending and cutting of steel reinforcement for concrete.

The revised British Standard for scheduling came into effect on the 1st January 2006, replacing BS8666:2000. However, both specifications are still in use with regards to specific shape codes, but the significant updates included in 8666:2005 must be respected.

BS CODE 00

BS SHAPE CODE 00
Total Length (L)

(L)= A

BS CODE 01

BS SHAPE CODE 01
Total Length (L)

(L)= A

Stock Lengths

BS CODE 11

BS SHAPE CODE 00
Total Length (L)

(L)= A + (B) - 0.5r — d

BS CODE 12

BS SHAPE CODE 12
Total Length (L)

(L)= A + (B) - 0.43r - 1.2d

BS CODE 13

BS SHAPE CODE 13
Total Length (L)

(L)= A + 0.57B + (C) - 1.6d

BS CODE 14

BS SHAPE CODE 14
Total Length (L)

(L)= A + (C) - 4d

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BS CODE 15

BS SHAPE CODE 15
Total Length (L)

(L)= A + (C)

BS CODE 21

BS SHAPE CODE 21
Total Length (L)

(L)= A + B + (C) - r - 2d

BS CODE 22

BS SHAPE CODE 22
Total Length (L)

(L)= A + B + C + (D) - 1.5r - 3d

BS CODE 23

BS SHAPE CODE 23
Total Length (L)

(L)= A + B + (C) - r - 2d

BS CODE 24

BS SHAPE CODE 24
Total Length (L)

(L)= A + B + (C)

BS CODE 25

BS SHAPE CODE 25
Total Length (L)

(L)= A + B + (E)

BS CODE 26

BS SHAPE CODE 26
Total Length (L)

(L)= A + B + (C)

BS CODE 27

BS SHAPE CODE 27
Total Length (L)

(L)= A + B + (C) - 0.5r - d

BS CODE 28

BS SHAPE CODE 28
Total Length (L)

(L)= A + B + (C) - 0.5r - d

BS CODE 29

BS SHAPE CODE 29
Total Length (L)

(L)= A + B + (C) - r - 2d

BS CODE 31

BS SHAPE CODE 31
Total Length (L)

(L)= A + B + C + (D) - 1.5r - 3d

BS CODE 32

BS SHAPE CODE 32
Total Length (L)

(L)= A + B + C + (D) - 1.5r - 3d

BS CODE 33

BS SHAPE CODE 33
Total Length (L)

(L)= 2A + 1.7B + 2(C) - 4d

BS CODE 34

BS SHAPE CODE 34
Total Length (L)

(L)= A + B + C + (E) - 0.5r - d

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BS CODE 35

BS SHAPE CODE 35
Total Length (L)

(L)= A + B + C + (E) - 0.5r - d

BS CODE 36

BS SHAPE CODE 36
Total Length (L)

(L)= A + B + C + (D) - r - 2d

BS CODE 41

BS SHAPE CODE 41
Total Length (L)

(L)= A + B + C + D + (E) - 2r - 4d

BS CODE 41 FLAG LINK

BS SHAPE CODE 41
Total Length (L)

(L)= A + B + C + D + (E) - 2r - 4d

BS CODE 44

BS SHAPE CODE 44
Total Length (L)

(L)= A + B + C + D + (E) - 2r - 4d

BS CODE 46

BS SHAPE CODE 46
Total Length (L)

(L)= A + 2B + C + (E)

BS CODE 47

BS SHAPE CODE 47
Total Length (L)

(L)= 2A + B + 2C + 1.5r - 3d

BS CODE 51

BS SHAPE CODE 51
Total Length (L)

(L)= 2(A + B + (C)) - 2.5r - 5d

BS CODE 56

BS SHAPE CODE 56
Total Length (L)

(L)= A + B + C + (D) + 2(E) - 2.5r - 5d

BS CODE 63

BS SHAPE CODE 63
Total Length (L)

(L)= 2A + 3B + 2(C) - 3r - 6d

BS CODE 64

BS SHAPE CODE 64
Total Length (L)

(L)= A + B + C + 2D + E + (F) - 3r - 6d

BS CODE 67

BS SHAPE CODE 67
Total Length (L)

(L)= A

BS CODE 75

BS SHAPE CODE 75
Total Length (L)

(L)= 3.142(A - d) + B

BS CODE 77

BS SHAPE CODE 77
Total Length (L)

(L)= C x 3.142(A - d)

BS CODE 98

BS SHAPE CODE 98
Total Length (L)

(L)= A + 2B + C + (D) - 2r - 4d

BS CODE 99

All other shapes are designated Shape Code 99, and as such require full drawings. All exact dimensions must be specified.

Rebar radius minimum bending tolerance

Minimum Scheduling Radii

d
Nominal Bar Diameter (mm)
r
Minimum Radius (mm)
M
Minimum Diameter of Bending Former (mm)
Minimum End Projection
General
Min. 5d Straight
Links Where Bends <150℃
Min. 10d Straight
8 16 32 115 115
10 20 40 120 130
12 24 48 125 160
16 32 64 130 210
20 70 140 190 290
25 87 175 240 365
32 112 224 305 465
40 140 280 380 580
50 175 350 475 725

* The minimum end projections for smaller bars is governed by the practicalities of bending bars.
Note 1 Due to 'spring back' the actual radius of bend will be slightly greater than half the diameter of former.
Note 2 BS 4449:2005 grade B500A in sizes below 8mm does not conform to BS EN 1992-1.1:2004.

Radius of Bending: Maximum Values Requiring Bending

Bar Size 8 10 12 16 20 25 32 40
Radius (m) 2.75 3.5 4.25 7.5 14.0 30.0 43.0 58.0

Note: Bars to be formed to a redius exceeding the above dimensions will be supplied straight.

If needed, copies of BS 8666:2005 can be purchased on the BSI website here


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