Shape Code	Method of measurement of bending dimensions	Total length of bar (L) measured along centreline
00		A
01		A Stock length See Note 4.
11		A+(B) - 0.5r - d Neither A nor B shall be less than P in Table 2.
12		A+ (B) - 0.43R - 1.2d Neither A nor B shall be less than P in Table 2 nor less than (R + 6d).
13		A + 0.57B + (C) - 1.6d B shall not be less than 2(r+d). Neither A nor C shall be less than P in Table 2 nor less than (B/2 + 5d). See Note 3.
14		A +(C) - 4d Neither A nor (C) shall be less than P in table 2. See note 1.
15		A + (C) Neither A nor (C) shall be less than P in Table 2. See Note 1.
21		A+B + (C) - r - 2d Neither A nor (C) shall be less than P in Table 2.
22		A + B + C + (D) - 1.5r - 3d C shall not be less than 2(r+d). Neither A nor (D) shall be less than P in Table 2. (D) shall not be less than C/2+5d.

Shape Code	Method of measurement of bending dimensions	Total length of bar (L) measured along centreline
23		A+B + (C) - r - 2d Neither A nor (C) shall be less than P in Table 2.
24		A+ B + (C) A and (C) are at 90° to one another.
25		A+ B + (E) Neither Anor B shall be less than P in Table 2 If E is the critical dimension, schedule a 99 and specify Aor B as the free dimension. See Note 1.
26		A + B + (C) Neither A nor (C) shall be less than P in Table 2. See Note 1.
27		A + B + (C) - 0.5r - d Neither A nor (C) shall be less than P in Table 2. See Note 1.
28		A + B + (C) - 0.5r - d Neither A nor (C) shall be less than P in Table 2. See Note 1.
29		A + B + (C) - r - 2d Neither A nor (C) shall be less than P in Table 2. See Note 1.
31		A+ B + C + (D) - 1.5r - 3d Neither A nor (D) shall be less than P in Table 2.
32		A + B + C+ (D) -1.5r - 3d Neither A nor (D) shall be less than p in Table 2.

All other shapes in BS8666 are shape code 99. Shape code 99 shall have a maximum of four bends. Publication - British Standard BS 8666:2005 Scheduling, dimensioning,

Shape Code	Method of measurement of bending dimensions	Total length of bar (L) measured along centreline
33		A
34		A Stock length See Note 4.
35		A+(B) - 0.5r - d Neither A nor B shall be less than P in Table 2.
36		A+ (B) - 0.43R - 1.2d Neither A nor B shall be less than P in Table 2 nor less than (R + 6d).
41		A + 0.57B + (C) - 1.6d B shall not be less than 2(r+d). Neither A nor C shall be less than P in Table 2 nor less than (B/2 + 5d). See Note 3.
44		A +(C) - 4d Neither A nor (C) shall be less than P in table 2. See note 1.
46		A + (C) Neither A nor (C) shall be less than P in Table 2. See Note 1.
47		A+B + (C) - r - 2d Neither A nor (C) shall be less than P in Table 2.
51		A + B + C + (D) - 1.5r - 3d C shall not be less than 2(r+d). Neither A nor (D) shall be less than P in Table 2. (D) shall not be less than C/2+5d.

Shape Code	Method of measurement of bending dimensions	Total length of bar (L) measured along centreline
56		A+B + (C) - r - 2d Neither A nor (C) shall be less than P in Table 2.
63		A+ B + (C) A and (C) are at 90° to one another.
64		A+ B + (E) Neither Anor B shall be less than P in Table 2 If E is the critical dimension, schedule a 99 and specify Aor B as the free dimension. See Note 1.
67		A + B + (C) Neither A nor (C) shall be less than P in Table 2. See Note 1.
75		A + B + (C) - 0.5r - d Neither A nor (C) shall be less than P in Table 2. See Note 1.
77		A + B + (C) - 0.5r - d Neither A nor (C) shall be less than P in Table 2. See Note 1.
98		A + B + (C) - r - 2d Neither A nor (C) shall be less than P in Table 2. See Note 1.
99	All other shapes where standard shapes cannot be used. No other shape code number, form of designation or abbreviation shall be used in scheduling. Adimensioned sketch shall be drawn over the dimension columns Ato E. Every dimension shall be specified and the dimension that is to allow for permissible deviations shall be indicated in parenthesis, otherwise the fabricator is free to choose which dimension shall allow for tolerance. See Note 2.

Nominal size of bar d mm	Minimum radius for scheduling r mm	Minimum diameter of bending former m mm	Minimum Nominal size of bar end projection, P
			General (min 5d straight), including links where bend ????150º mm	Links where bend ????150º (min 10d straight) mm
6	12	24	110ª	1.10ª
8	16	32	115ª	115ª
10	20	40	120ª	130
12	24	48	125ª	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

ª The minimum end projections for smaller bars is governed by the practicalities of bending bars.

NOTE 1: The Length equations for shape codes 14, 15, 25, 26, 27, 28, 29, 34, 35, 36 and 46 are approximate and where the bend angle is greater than 45°, the length should be calculated more accurately allowing for the difference between the specified overall dimensions and the true length measured along the central axis of the bar. When the bending angles approach 90°, it is prefarable to specify shape code 99 with a fully dimensioned sketch.

NOTE 2: Five bends or more might be impractical within permitted tolerances.

NOTE 3: For shapes with straight and curved lengths (e.g shape codes 12, 13, 22, 33 and 47) the largest practical mandrel size for the production of a continuous curve is 400mm. See also Clause 10.

NOTE 4: Stock lengths are available in a limited number of lengths (e.g 6m, 12m). Dimension A for shape code 01 should be regarded as indicative and used for the purpose of calculating total length. Actual delivery lengths should be by agreement with the supplier.