Standard Shape Codes for UK detailing

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 Standard Shape Codes





























General Notes 

The values for minimum radius and end dimensions, r and A respectively, as specified in Table B.1, shall apply to all shape codes. 


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 possible 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 BS 86666). BS 86666, Figures 4, 5 and 6 should be used in the interpretation of bending dimensions.

Notes 

1 The length equations for shapes 14, 15, 25, 26, 27, 28, 29, 34, 35, 36 and 46 are approximate and where the bend angle is greater than 45º, 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 90º, it is preferable to specify shape code 99 with a fully dimensioned sketch. 


2 5 bends or more may be impractical within permitted tolerances. 


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 BS 86666 Clause 10. 


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. Tolerances for shape code 01, stock lengths, shall be subject to the relevant product standard, e.g. BS 449:2005.




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