ANSI/AWI 1236-2022 - Countertops
a) All visible surfaces of an installed countertop
b) The exposed underside surface, greater than 1067 mm [42”] above the finished floor.
a) The underside of countertops that are 1067 mm [42”] or less above the finished floor.
b) All non-visible surfaces attached to and/or covered by another surface.
c) All non-visible blocking, spacers, etc., used for attachment.