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In the UK (and other parts of the EU), 'insulated' roller garage doors are available, using an aluminum lathe filled with polyurethane foam for thermal and acoustic insulation. Concerning thermal insulation, the roller door has a typical insulation R-value of 4.9 to 5.2. A sheet steel garage door has a typical insulation R-value of 0.5 to 2.7.
Greater space increases the insulation value up to a point, but eventually with a large enough gap, convection currents begin to flow carrying heat between the panes within the unit. Typically, most sealed units achieve maximum insulating values using a space of 16–19 mm (0.63–0.75 in) when measured at the centre of the IGU. [12]
Steel is an alloy of iron and carbon with improved strength and fracture resistance compared to other forms of iron. Because of its high tensile strength and low cost, steel is one of the most commonly manufactured materials in the world.
569 Lexington Avenue's main entrance is on the Lexington Avenue elevation [12] and is oriented slightly away from 51st Street. It consists of a set of metal doors on either side of a revolving door. In front of the entrance is a marquee of stainless steel with recessed lighting. [22]
The Mark Hellinger Theatre is at 237 West 51st Street, on the north sidewalk between Eighth Avenue and Broadway, in the Midtown Manhattan neighborhood of New York City. [3] [4] The irregular land lot covers 23,650 square feet (2,197 m 2), with a frontage of 225 feet (69 m) on 51st Street and a depth of 200 feet (61 m).
Around the world, there are about a billion cars on the road; [123] they burn over a trillion litres (0.26 × 10 ^ 12 US gal; 0.22 × 10 ^ 12 imp gal) of petrol and diesel fuel yearly, consuming about 50 exajoules (14,000 TWh) of energy. [124] The numbers of cars are increasing rapidly in China and India. [125]
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