Flanges are flatbars profiles which are attached to plate sides.
During production each flatbar's connections to plates are analysed.
In the following figure (see below) the standard flatbar’s specifications are given with the code FB80x5 L345. Which are codes for flatbar’s having a width of 80, a height of 5 and a length of 345.
Additional flange placement codes are:
<25/49 Which gives the side of the flatbar where this measurement belongs to
A75/105 Which gives the side of the flatbar where the angle belongs to (in degrees)