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Cross Tree

(1) A main horizontal member of the underframe (TRESTLE) of a POST MILL. There are commonly two, set at right-angles, but sometimes three. The outer ends carry the QUARTER BARS & the centre intersection fits the horns on the bottom of the MILL POST to steady it. The crosstrees normally rest on masonry or brick piers and carry the weight of the whole structure via the quarter bars. (2) In a horizontal watermill, a horizontal bar which steadies the LIGHTENING TREE at half its height to resist side thrust.

Alternative terms

Term	Language	Region
Guy Tree (2)	English