Am finishing garage shelving..need to put on doors (nice to match rest of
garage but not furniture grade). Woodshop is shaker style, so wanted doors
to match in general.

If the framing is done with hardwood (likely ash) what is the maxim door
dimensions I could use that would not sag or eventually fall out. The
vertical opening varies as does the horizontal opening, but imagine
horizontal openings that span several feet, like 4'.

Need something that looks good and will hold.