| 摘要 |
The ceiling beam (1) assembly, for the ceilings in dwellings and commercial property, has cross members (2) between neighboring beams of solid wood or glued wood blocks. The beams can be of wood, concrete or steel, etc The lower section (3) of the cross member has a length matching the gap between beams in a step structure, and a longer upper section (4) to rest on the beams at chamfered ends (5).
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