| Method of measurement of bending dimensions | Total length of bar (L) measured along centre line | |||
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|  | A | ||
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| | A Stock lengths. See Note 4. | ||
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|  | A+(B)- 0.5r-d Neither A nor B shall be less than P in Table 2 | ||
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|  | A+(B)- 0.43R - 1.2d Neither A nor B shall be less than P in Table 2 nor less than (R + 6d) | ||
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|  | 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. | ||
| Key 1 Semi-circular | ||||
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|  | A + (C)- 4d Neither A nor (C) shall be less than P in Table 2. See Note 1. | ||
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|  | A+(C) Neither A nor (C) shall be less than P in Table 2. See Note 1. | ||
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|  | A + B + (C)- r - 2d Neither A nor (C) shall be less than P in Table 2. | ||
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|  | 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. | ||
| Key 1 Semi-circular | ||||
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|  | A + B + (C) - r - 2d Neither A nor (C) shall be less than P in Table 2. | ||
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|  | A + B + (C) A and (C) are at 90° to one another. | ||
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|  | A + B + (E) Neither A nor B shall be less than P in Table 2. If E is the critical dimension, schedule as 99 and specify A or B as the free dimension. See Note 1. | ||
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|  | A + B + (C) Neither A nor (C) shall be less than P in Table 2. See Note 1. | ||
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|  | A +B +(C) -0.5r -d Neither A nor (C) shall be less than P in Table 2. See Note 1. | ||
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|  | A +B +(C) -0.5r -d Neither A nor (C) shall be less than P in Table 2. See Note 1. | ||
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|  | A + B + (C) -r -2d Neither A nor (C) shall be less than P in Table 2. See Note 1. | ||
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|  | A +B +C +(D) -1.5r -3d Neither A nor (D) shall be less than P in Table 2. | ||
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|  | A +B +C +(D) -1.5r -3d Neither A nor (D) shall be less than P in Table 2. | ||
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|  | 2A + 1.7B + 2(C) -4d A shall not be less than 12d + 30mm. B shall not be less than 2(r+d). (C) shall not be less than P in Table 2, nor less than B/2 + 5d. See Note 3. | ||
| Key 1 Semi-circular | ||||
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|  | A +B +C +(E)-0.5r -d Neither A nor (E) shall be less than P in Table 2. See Note 1. | ||
| Method of measurement of bending dimensions | Total length of bar (L) measured along centre line | |||
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|  | A +B +C +(E) -0.5r -d Neither A nor (E) shall be less than P in Table 2. See Note 1. | ||
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|  | A +B +C +(D)-r -2d Neither A nor (D) shall be less than P in Table 2. See Note 1. | ||
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|  | A +B +C +D +(E) -2r -4d Neither A nor (E) shall be less than P in Table 2. | ||
 May also be used for a flag link viz: | ||||
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|  | A +B +C +D +(E) -2r -4d Neither A nor (E) shall be less than P in Table 2. | ||
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|  | A +2B +C +(E) Neither A nor (E) shall be less than P in Table 2. | ||
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|  | 2A +B +2C +1.5r -3d (C) and (D) shall be equal and not more than A nor less than P in Table 2. | ||
| Where (C) and (D) are to be minimized the following formula may be used: L = 2A + B + max(21d, 240) | ||||
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|  | 2(A +B +(C)) -2.5r -5d (C) and (D) shall be equal and not more than A or B nor less than P in Table 2. | ||
| Where (C) and (D) are to be minimized the following formula may be used: L = 2A + 2B + max(16d, 160) | ||||
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|  | A +B +C +(D) +2(E) -2.5r -5d (E) and (F) shall be equal and not more than B or C, nor less than P in Table 2. | ||
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|  | 2A +3B +2(C) -3r -6d (C) and (D) shall be equal and not more than A or B nor less than P in Table 2. | ||
| Where (C) and (D) are to be minimized the following formula may be used: L = 2A + 3B + max(14d, 150) | ||||
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|  | A +B +C +2D +E +(F) -3r -6d Neither A nor (F) shall be less than P in Table 2. See Note 2. | ||
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|  | A See clause 10. | ||
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|  | π(A - d) + B Where B is the lap. | ||
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|  | Cπ(A-d) C = number of turns | ||
| Where B is greater than A/5 this equation no longer applies, in which case the following formula may be used: L = C((π(A -d))2 + B2)0.5 | ||||
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|  | A +2B +C + (D) -2r -4d Isometric sketch Neither C or (D) shall e less than P in Table 2. | ||
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| All other shapes | To be calculated See Note 2. | ||
| Where standard shapes cannot be used. No other shape code number, form of designation or abbreviation shall be used in scheduling. A dimensioned sketch shall be drawn over the dimension columns A to 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. | ||||
The dimensions in parentheses are the free dimensions. If a shape given in this table is required but a different dimension is to allow for the possile deviations, the shape shall be drawn out and given the shape code 99 and the free dimension shall be indicated in parentheses.
The length of straight between two bends shall be at least 4d, see Figure 6.
Figure 4, Figure 5 and Figure 6 should be used in the interpretation of ending dimensions.
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 preferable to specify shape code 99 with a fully dimensioned sketch.
Note 2 Five ends 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 400 mm. See also Clause 10.
Note 4 Stock lengths are available in a limited numer 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 supplier.
