stair trimmer

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1. A piece of timber inserted in a roof, floor, wooden partition, or the like, to support a header which in turn supports the ends of the joists, rafters, studs, etc.
2. A small horizontal beam, as in a floor, into which the ends of one or more joists are framed; often named from the place of use as a hearth trimmer, stair trimmer, etc.
4. Variously shaped ceramic tile used as bases, caps, corners, moldings, and angles, as necessary to complete an installation and to satisfy sanitary and architectural requirements.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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