单词 | collar-beam |
释义 | collar-beamn. 1. Architecture. A horizontal beam connecting a pair of rafters, which prevents them from spreading or ‘sagging’ (bending in); it is attached about the middle of the rafters, which distinguishes it from a tie-beam. ΘΚΠ society > inhabiting and dwelling > inhabited place > a building > parts of building > framework of building > [noun] > roof-beam pan1284 roof-tree1321 wiverc1325 sile1338 wind-beam1374 bindbalkc1425 trave1432 purlin1439 side-waver1451 wind-balk1532 roof beam1551 post1567 crock1570 spercil1570 collar-beam1659 camber1679 top-beam1679 camber-beam1721 jack rafter1736 hammer-beam1823 tie-beam1823 spar-piece1842 viga1844 collar1858 spanner1862 cruck1898 1659 T. Willsford Architectonice 12 Principall sparres or rafters..are made according to the true pitch of the building intended; about the middle (in common structures) each of them hath a collar-beam. 1663 B. Gerbier Counsel to Builders 73 The Coller beams eight and three inches. ?1677 S. Primatt City & Covntry Purchaser & Builder 86 Choller-beams. 1837 P. Nicholson New Pract. Builder (new ed.) i. 29 A collar-beam is..usually employed where there are no king-posts. 2. Nautical. (See quots.) ΚΠ 1769 W. Falconer Universal Dict. Marine Transl. French Terms Clef de beaupré, the collar-beam, which is raised a little above the second deck, to fortify the bowsprit. 1850 J. Greenwood Sailor's Sea-bk. 95 The Collar-Beam is the beam upon which the stanchions of the beak-head bulk-head stand. This entry has not yet been fully updated (first published 1891; most recently modified version published online March 2022). > as lemmascollar-beam camber-beam: one with its upper surface curving downward on both sides from the middle. collar-beam: a beam used to join together roof-rafters above the base of the roof, acting either as a tie or a strut. dragon-beam: a short piece of timber lying diagonally with the wall plates at the angles of the roof, for receiving the heel of the hip rafter. hammer-beam: a beam acting as a tie, but not extending across the whole span of the roof. tie-beam: the beam which connects the bottom of a pair of principal rafters, and prevents them from thrusting out the walls.extracted from beamn.1< n.1659 as lemmas |
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