fire grates come in sizes that are the arc length of the front edge
a manufacturer provides these dimensions for a '16 inch' grate
assume that the centre of the arc is at the back edge of the grate
convert to inches using 25.4 mm = 1 inch
is the arc length close to 16" ?
the dimensions for other grate sizes are:
12" = 280mm, 220mm, 170mm
14" = 330mm, 240mm, 210mm
what are the arc lengths of these grates?