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See also:ROOD (O.E. See also:rod, a stick, another See also:form of " rod, O.E. rodd, possibly cognate with See also:Lat. rudis, a See also:staff)
, properly a See also:rod or See also:pole, and so used as the name of a See also:surface measure of See also:land
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The See also:rood varies locally but is generally taken as = 4o square rods, poles or perches; 4 roods=1 See also:acre
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The See also:term was, however, particularly applied, in O.E., to a gallows or See also:cross, especially to the See also:Holy Cross on which See also:Christ was crucified, the sense in which the word survives
.
A crucifix, often accompanied by figures of St See also: In See also:England rood lofts do not appear to have been introduced before the 14th See also:century, and were not See also:common till the 15th . The " roods " themselves were not The simplest See also:form is the " See also:flat roof " consisting of See also:horizontal See also:wood joists laid from wall to wall as in See also:floor construction . The roof must not be quite flat, for a slight fall is necessary in its upper surface to allow See also:water to drain away into gutters placed at convenient points . The i joists are covered with a waterproof material such as See also:asphalt, 1 lead, See also:zinc or See also:copper, the three last materials being usually laid upon boarding, which stiffens the structure and forms a See also:good surface to See also:fix the weatherproof covering upon . Such See also:roofs are not suitable for See also:cold climates, for accumulations of See also:snow might overburden the structure and would also cause the wet to penetrate through any small crevices and under flashings . With flat roofs the pressure exerted upon the supports is directly See also:vertical . " Lean-to," " See also:shed," or " pent " roofs are practically developments of the flat roof, one end of the joists (which are now called " rafters ") being tipped up to form a decided slope, which enables slates, tiles, corrugated See also:iron and other materials to be employed which cannot be used upon a " flat " roof . See also:Simple roofs in general use with a See also:double slope are the " coupled See also:rafter roofs," the rafters See also:meeting at the highest point upon a horizontal See also:ridge-piece which stiffens the framework and gives a level ridge-See also:line . In some old roofs the rafters are connected without any intervening ridge-See also:plate, with the result that after Forms of roof . |
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