Glossary Terms for the Letter U View the Entire Glossary A  | B  | C  | D  | E  | F  | G  | H  | I  | J  | K  | L  | M  | P  | Q  | R  | S  | T  | U  | V  | W Unit A Unit is a logical assembly of masonry Parts used to build a final product. Examples: Columns, Door Surrounds, Entries, Balustrade, Fountains. Unit Interface Drawings A drawing showing the placement and interconnection of Units in an area.