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  2. Robert Allerton Park - Wikipedia

    en.wikipedia.org/wiki/Robert_Allerton_Park

    Construction of the house began on June 13, 1899, and was mostly finished about a year later, in 1900, at a cost of approximately $50,000. Adjusted for inflation, his house would have cost approximately $1.3 million in 2011 dollars. By fall of 1900, though the interiors were not completely finished, Robert Allerton moved into his new house.

  3. Flat roof - Wikipedia

    en.wikipedia.org/wiki/Flat_roof

    A flat roof is the most cost-efficient roof shape as all room space can be used fully (below and above the roof). Having a smaller surface area, flat roofs require less material and are usually stronger than pitched roofs. [26] This style roof also provides ample space for solar panels or outdoor recreational use such as roof gardens.

  4. One World Trade Center - Wikipedia

    en.wikipedia.org/wiki/One_World_Trade_Center

    The terms of the lease agreement signed in 2001, a $3.22 billion bid to lease-purchase the World Trade Center, [243] of which Silverstein personally put up $14 million, [244] gave Silverstein, as leaseholder, the right and obligation to rebuild the structures if they were destroyed. [245]

  5. How much does a 1% change in mortgage rates actually matter ...

    www.aol.com/finance/how-much-does-1-percent...

    Rates could fall even further as the Federal Reserve prepares to make its third federal funds rate cut on Wednesday, December 18, 2024. While the year-over-year shift in mortgage rates may appear ...

  6. Concrete recycling - Wikipedia

    en.wikipedia.org/wiki/Concrete_recycling

    Small pieces are used as gravel for new construction projects. Sub-base gravel is laid as the lowest layer in a road, with fresh concrete or asphalt poured over it. [20] The US Federal Highway Administration may use such techniques to build new highways from the materials of old highways. [21]

  7. Hoover Dam - Wikipedia

    en.wikipedia.org/wiki/Hoover_Dam

    To make the powerhouse roof bombproof, it was constructed of layers of concrete, rock, and steel with a total thickness of about 3.5 feet (1.1 m), topped with layers of sand and tar. [ 95 ] In the latter half of 1936, water levels in Lake Mead were high enough to permit power generation, and the first three Allis Chalmers built Francis turbine ...

  8. Reflective surfaces (climate engineering) - Wikipedia

    en.wikipedia.org/wiki/Reflective_surfaces...

    As part of the new efforts, DOE will install a cool roof, whenever cost-effective over the lifetime of the roof, during construction of a new roof or the replacement of an old one at a DOE facility. In October 2013, the United States Department of Energy ranked Cool Roofs as a 53 out of 100 (0 to 100 weighted average) for a cost-effective ...

  9. List of tallest buildings - Wikipedia

    en.wikipedia.org/wiki/List_of_tallest_buildings

    Some assessments of the tallest building use 'height to roof' to determine tallest building, as 'architectural feature' is regarded as a subjective and an imprecise comparative measure. However, in November 2009, the CTBUH stopped using the roof height as the metric for tall buildings because modern tall buildings rarely have a part of the ...