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cabarrus county board of commissioners regular meeting november ...

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October 17, 2011 (Regular Meeting)PageHIP ROOF - The hip ro<strong>of</strong> is usually pitched in four directions.HIPROOFING STRUCTURE, cont.IRREGULAR ROOF - Any <strong>of</strong> a variety <strong>of</strong> unusual slopes, which do not have thesame rise per foot, run throughout.MANSARD - A ro<strong>of</strong> with two slopes on all four sides; the lower slope verysteep, the upper slope almost flat.MANSARDPRESTRESSED CONCRETE - Ro<strong>of</strong>s that are made up <strong>of</strong> concrete, which has beenmade up elsewhere, pre-stressed, and erected in place with cranes.Pre-stressing makes it possible to use less steel and usually lessbulky than reinforcing.REINFORCED CONCRETE ROOF - Ro<strong>of</strong> framing where concrete is formed and pouredin place with a system <strong>of</strong> steel rods or mesh for absorbing tensile andshearing stresses. Ro<strong>of</strong> framing <strong>of</strong> this type has been formed andpoured on the ground, and, through a system <strong>of</strong> hydraulic jacks, raisedto proper position.RIGID FRAME WITH BAR JOIST - Bar joists are fabricated steel open trusses,which have been set close together, and serve as ro<strong>of</strong> beams or ceilingjoists. The span <strong>of</strong> these is limited due to their lightness and depth.Bar joists limit ro<strong>of</strong> shape to flat or shed and is to be used in place<strong>of</strong> flat or shed ro<strong>of</strong>s on commercial buildings with medium spans.SAW TOOTH ROOF - A ro<strong>of</strong>, which is formed <strong>of</strong> a number <strong>of</strong> trusses havingunequal slopes. When viewed from the end, such a ro<strong>of</strong> presents aserrated pr<strong>of</strong>ile similar to the teeth <strong>of</strong> a saw.SAWTOOTHROOFING STRUCTURE, cont.A-1Page 207

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