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SPAN (from O. Eng. spannan, to bind, connect together; the word is of See also:general occurrence in See also:Teutonic See also:languages, the ultimate origin being the See also:root See also:spa-, to extend; stretch out, cf. Gr. oirav, to draw out, See also:Lat. spatium, space) , a distance stretched, the space between terminal points . The word was formerly used as a measure of length= lo.368 in., taken from the stretch of the fully opened See also:hand from thumb to little See also:finger . The See also:term is used in See also:architecture for the width or opening of an See also:arch or arched opening, and also the width of a roof between the See also:wall plates . A " span roof " is a roof having two sides inclining to a centre or See also:ridge, in contradistinction to a " See also:shed roof " (see SHED) . |
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