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
Total Length (L)
(L)= A(L)= ABS CODE 01
Total Length (L)
(L)= AStock Lengths
BS CODE 11
Total Length (L)
(L)= A + (B) - 0.5r — d
BS CODE 12
Total Length (L)
(L)= A + (B) - 0.43r - 1.2d
BS CODE 13
Total Length (L)
(L)= A + 0.57B + (C) - 1.6d
BS CODE 14
Total Length (L)
(L)= A + (C) - 4d
BS CODE 15
Total Length (L)
(L)= A + (C)
BS CODE 21
Total Length (L)
(L)= A + B + (C) - r - 2d
BS CODE 22
Total Length (L)
(L)= A + B + C + (D) - 1.5r - 3d
BS CODE 23
Total Length (L)
(L)= A + B + (C) - r - 2d
BS CODE 24
Total Length (L)
(L)= A + B + (C)
BS CODE 25
Total Length (L)
(L)= A + B + (E)
BS CODE 26
Total Length (L)
(L)= A + B + (C)
BS CODE 27
Total Length (L)
(L)= A + B + (C) - 0.5r - d
BS CODE 28
Total Length (L)
(L)= A + B + (C) - 0.5r - d
BS CODE 29
Total Length (L)
(L)= A + B + (C) - r - 2d
BS CODE 31
Total Length (L)
(L)= A + B + C + (D) - 1.5r - 3d
BS CODE 32
Total Length (L)
(L)= A + B + C + (D) - 1.5r - 3d
BS CODE 33
Total Length (L)
(L)= 2A + 1.7B + 2(C) - 4d
BS CODE 34
Total Length (L)
(L)= A + B + C + (E) - 0.5r - d
BS CODE 35
Total Length (L)
(L)= A + B + C + (E) - 0.5r - d
BS CODE 36
Total Length (L)
(L)= A + B + C + (D) - r - 2d
BS CODE 41
Total Length (L)
(L)= A + B + C + D + (E) - 2r - 4d
BS CODE 41 FLAG LINK
Total Length (L)
(L)= A + B + C + D + (E) - 2r - 4d
BS CODE 44
Total Length (L)
(L)= A + B + C + D + (E) - 2r - 4d
BS CODE 46
Total Length (L)
(L)= A + 2B + C + (E)
BS CODE 47
Total Length (L)
(L)= 2A + B + 2C + 1.5r - 3d
BS CODE 51
Total Length (L)
(L)= 2(A + B + (C)) - 2.5r - 5d
BS CODE 56
Total Length (L)
(L)= A + B + C + (D) + 2(E) - 2.5r - 5d
BS CODE 63
Total Length (L)
(L)= 2A + 3B + 2(C) - 3r - 6d
BS CODE 64
Total Length (L)
(L)= A + B + C + 2D + E + (F) - 3r - 6d
BS CODE 67
Total Length (L)
(L)= A
BS CODE 75
Total Length (L)
(L)= 3.142(A - d) + B
BS CODE 77
Total Length (L)
(L)= C x 3.142(A - d)
BS CODE 98
Total Length (L)
(L)= A + 2B + C + (D) - 2r - 4dBC CODE 99
All other shapes are designated Shape Code 99, and as such require full drawings. All exact dimensions must be specified.
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
