In architecture, wind braces are diagonal braces to tie the rafters of a roof together and prevent racking. In medieval roofs they are arched, and run from the principal rafters to catch the purlins.^[1]

1. ^  One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Wind Braces". Encyclopædia Britannica. Vol. 28 (11th ed.). Cambridge University Press. p. 708.

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