Method of measurement of bending dimensions

Total length of bar (L) measured along centre line




A




A+h 



A+2h 



A+n
Where the overall dimension of the bob is critical, use shape code 37.




A+2n
Where the overall dimension of either bob is critical, do not use this shape code.




A+(B)½rd
This formula is approximate. Where r is greater than the minimum value in table 3 BS 4466 1989, use shape code 51.




A+B+(C)r2d



Method of measurement of bending dimensions

Total length of bar (L) measured along centre line




If angles with the horizontal are 45° or less:
A+B+(C)
see note 4.




If angles with the horizontal are 45° or less:
A+2B+C+(E)
see note 4.




A+(B)½Rd
This formula is approximate, if R is minimum, use shape 37. If R is greater than 200mm, see note 2 to clause 10 BS 4466 1989.




2(A+B)+12d
Neither A nor B are to be less than 12d or 150mm, whichever is the greater, for grade 460 in sizes not exceeding 20 mm nor less than 14d for sizes of 25mm and over.


Neither A nor B are to be less than 10d for grade 250 with a minimum value of A and B of 100mm. See note 3. 



If angle with horizontal is 45° or less.
A+(C)
See note 4.




2A+3B+18d
If B is greater than 400+2d, see note 2 to clause 10 BS 4466 1989.
See note 3


