Skyscraper shorter than the W350 Project despite having 10 more stories. Wooden skyscrapers are estimated to be around a quarter of the weight of an equivalent reinforced-concrete structure as well as reducing the building carbon footprint by 60–75%. Buildings have been designed using cross-laminated timber (CLT) which gives a higher rigidity and strength to wooden structures. CLT panels are prefabricated and can therefore speed up building time. Skyscraper A skyscraper is a continuously habitable high-rise building that has over 40 floors and is taller than approximately . Historically, the term first referred to buildings with 10 to 20 floors in the
Collier's Encyclopedia about two-fifths of the pages. Bibliographies are found in the last volume which also contains the 450,000 entry essential index. An annual "Collier's Year Book" was also published. In 1998 Microsoft bought the rights to Collier's electronic version and incorporated it into its "Encarta" electronic encyclopedia. Atlas Editions (formerly Collier Newfield) retained the rights to publish the encyclopedia in book form, though since then, Collier's has ceased to be in print. A well-known comparison is that of Kenneth Kister, who gave a qualitative and quantitative comparison of "Collier's Encyclopedia" with the "Encyclopædia Britannica" and the "Encyclopedia Americana". For the "quantitative"