BM has various meanings in the Internet - SMS - Text & Chating category. Discover the full forms, definitions, and usage contexts of BM in Internet - SMS - Text & Chating.
(a) A beam placed perpendicular to joists and to which joists are nailed in framing for a chimney, stairway, or other opening. (b) A wood lintel. (c) The horizontal structural member over an opening (for example over a door or window). A structural member, usually horizontal, whose main function is to carry loads transverse to its longitudinal axis.
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