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Glossary

A-labeled door

A door carrying a certification from the Underwriters Laboratories, Inc. that it meets the requirements for a class-A door.

Glossary

a jour, ajour

Pierced, perforated, or cut out to form a decorative opening in wood, stone, metal, or other material.

Glossary

A-frame house

A house, usually constructed of wood, with a roof that extends steeply downward from both sides of a central ridge,

Glossary

A-frame

three-piece rigid structural frame in the shape of the upright capital letter A.

Glossary

A-block

A hollow, concrete masonry unit with one end closed and the opposite end open, having  a web between, so that two

Walls

‘Compo’ mortar

During the last 50 years it has been considered good practice to use a mortar in which the advantages of lime

Glossary

1/C

Abbr. for single conductor

Glossary

dry-wall finish

An interior covering material such as gypsum board or plywood, which is usually applied in large sheets or panels; does

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