rebar bending shape codes

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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 SHAPE CODE 00

BS CODE 00

Total Length (L)

(L)= A(L)= A
 

BS SHAPE CODE 00

BS CODE 01

Total Length (L)

(L)= A
Stock Lengths

BS SHAPE CODE 11

BS CODE 11

Total Length (L)

(L)= A + (B) - 0.5r — d
 

BS SHAPE CODE 12

BS CODE 12

Total Length (L)

(L)= A + (B) - 0.43r - 1.2d
 

BS SHAPE CODE 13

BS CODE 13

Total Length (L)

(L)= A + 0.57B + (C) - 1.6d
 

BS SHAPE CODE 14

BS CODE 14

Total Length (L)

(L)= A + (C) - 4d
 

BS SHAPE CODE 15

BS CODE 15

Total Length (L)

(L)= A + (C)
 

BS SHAPE CODE 21

BS CODE 21

Total Length (L)

(L)= A + B + (C) - r - 2d
 

BS SHAPE CODE 22

BS CODE 22

Total Length (L)

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

BS SHAPE CODE 23

BS CODE 23

Total Length (L)

(L)= A + B + (C) - r - 2d
 

BS SHAPE CODE 24

BS CODE 24

Total Length (L)

(L)= A + B + (C)
 

BS SHAPE CODE 25

BS CODE 25

Total Length (L)

(L)= A + B + (E)
 

BS SHAPE CODE 26

BS CODE 26

Total Length (L)

(L)= A + B + (C)
 

BS SHAPE CODE 27

BS CODE 27

Total Length (L)

(L)= A + B + (C) - 0.5r - d
 

BS SHAPE CODE 28

BS CODE 28

Total Length (L)

(L)= A + B + (C) - 0.5r - d
 

BS SHAPE CODE 29

BS CODE 29

Total Length (L)

(L)= A + B + (C) - r - 2d
 

BS SHAPE CODE 31

BS CODE 31

Total Length (L)

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

BS SHAPE CODE 32

BS CODE 32

Total Length (L)

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

BS SHAPE CODE 33

BS CODE 33

Total Length (L)

(L)= 2A + 1.7B + 2(C) - 4d
 

BS SHAPE CODE 34

BS CODE 34

Total Length (L)

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

BS SHAPE CODE 35

BS CODE 35

Total Length (L)

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

BS SHAPE CODE 36

BS CODE 36

Total Length (L)

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

BS SHAPE CODE 41

BS CODE 41

Total Length (L)

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

BS SHAPE CODE 41 Flag Link

BS CODE 41 FLAG LINK

Total Length (L)

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

BS SHAPE CODE 44

BS CODE 44

Total Length (L)

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

BS SHAPE CODE 46

BS CODE 46

Total Length (L)

(L)= A + 2B + C + (E)
 

BS SHAPE CODE 47

BS CODE 47

Total Length (L)

(L)= 2A + B + 2C + 1.5r - 3d
 

BS SHAPE CODE 51

BS CODE 51

Total Length (L)

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

BS SHAPE CODE 56

BS CODE 56

Total Length (L)

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

BS SHAPE CODE 63

BS CODE 63

Total Length (L)

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

BS SHAPE CODE 64

BS CODE 64

Total Length (L)

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

BS SHAPE CODE 67

BS CODE 67

Total Length (L)

(L)= A
 

BS SHAPE CODE 75

BS CODE 75

Total Length (L)

(L)= 3.142(A - d) + B
 

BS SHAPE CODE 77

BS CODE 77

Total Length (L)

(L)= C x 3.142(A - d)
 

BS SHAPE CODE 98

BS CODE 98

Total Length (L)

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

BC CODE 99

All other shapes are designated Shape Code 99, and as such require full drawings. All exact dimensions must be specified.
Rebar 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
81632115115
102040120130
122448125160
163264130210
2070140190290
2587175240365
32112224305465
40140280380580
50175350475725

* 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 Size810121620253240
Radius (m)2.753.54.257.514.030.043.058.0

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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