Strike Off Plate

Probably, so long as your approving authority (DOT) is not particular about the specs.  The reason is that by the nature of plexiglass manufacturing, it typically “underruns” so the ½” nominal thickness can actually be outside the .5” +/- .005” that is typically specified.  That is why we use 5/8” thk. Plexiglass. You have enough variables in field testing, let’s just take that one out of the picture.