BS 8666: 2005 Standard shapes
Shape and total length of bar (L) measured along the centre-line
All other shapes 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 dimensional 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.
No other shape code, number, form of designation or abbreviation shall be used in scheduling. A dimensioned sketch shall be drawn over the dimensional 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.