The trestle of a post mill is the arrangement of the main post, crosstrees and quarterbars that form the substructure of this type of windmill.[1] It may or may not be surrounded by a roundhouse. Post mills without a roundhouse are known as open trestle post mills.[2]
A well preserved example of a timber crosstree, from the trestle of a medieval windmill, was excavated by archaeologists at Humberstone, near Leicester, in 2007.[7]
Farries, Kenneth G. (1982). Essex Windmills, Millers and Millwrightes. Vol. Two: A Technical Review. London and Edinburgh: Charles Skilton. ISBN0-284-98637-2.
Smith, Arthur C. (1990). Drainage Windmills of the Norfolk Marshes. Stevenage: Arthur Smith Publication. ISBN0-9515766-0-7.