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Galileo then tried to estimate the roof's thickness which would have to prevent its collapse on the captives beneath. He tried to scale up the dome of the Florence Cathedral (known to be 45 metres wide but only 3 metres thick) and concluded that the roof of hell would have to be 600 kilometres thick. [1]
These variables include, building material of the envelope, thicknesses of the building materials, day of the year, time of day, orientation of the surface (e.g. wall or roof, 90 degrees or 180), and wall face orientation (cardinal directions, i.e. N, NW, S, SE, etc.), to name a few.
In 2008, EagleView introduced an aerial roof measurement technology [8] using algorithms to infer the size and area of the roof. [9]In 2011, EagleView introduced EagleView SunSite, a solar 3D-roofing report for solar integrators and installers that estimates solar exposure, rafter lengths, grid layout and overall roof orientation in degrees.
It can also calculate material costs and estimates and display results in fractional or decimal forms, area, volume or perimeter functions, weight calculations, roofing, rafter, framing solutions, concrete calculations, complete stair layouts, right-angle functions, circular calculations, building materials estimate: blocks, drywall, footing ...
However, R-value is widely used in practice to describe the thermal resistance of insulation products, layers, and most other parts of the building enclosure (walls, floors, roofs). Other areas of the world more commonly use U-value/U-factor for elements of the entire building enclosure including windows, doors, walls, roof, and ground slabs. [27]
The roofline model is an intuitive visual performance model used to provide performance estimates of a given compute kernel or application running on multi-core, many-core, or accelerator processor architectures, by showing inherent hardware limitations, and potential benefit and priority of optimizations.
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Uniformat is a standard for classifying building specifications, cost estimating, and cost analysis in the U.S. and Canada.The elements are major components common to most buildings.
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