OK, this has been bugging me for years.
Checkered plate is NOT Grating, and therefore should not have a 'span' indicator on the 2D details.
Checkered plate often gets bent in a press brake, so allow us to do this!
At the moment I have to model checkered plates that are bent as folded plates, and sometimes this creates issues with left/right pieces and piece marks, which forces me to use checkered plate 'grating', which I can't bend. Catch 22!
Fix this please, along with many of my other suggestions!