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Meanings of principal rafter in English
One of several parallel sloping beams that extend from the ridge to the wall-plate, to support the roof and its associated loads; the sloping top member of a roof truss, which carries the purlins.
See moreUsage of principal rafter in English
1
Inside the Hut extra struts were introduced, stiffening the principal rafters on the southern side.
2
Hence generally, in buildings of stone and marble, the mutules are carved with a downward slant, in imitation of the principal rafters.