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
Compton's Encyclopedia "The New Grolier Electronic Encyclopedia" (1988–1991), still pictures were added. Variants of Compton's CD-ROM encyclopedias were "Compton's Concise Encyclopedia", "Compton's Family Encyclopedia", and "Compton's Interactive Encyclopedia". Compton's Encyclopedia Compton's Encyclopedia and Fact-Index is a home and school encyclopedia first published in 1922 as Compton's Pictured Encyclopedia. The word "Pictured" was removed from the title with the 1968 edition. The encyclopedia is now advertised as "Compton's by Britannica". "Compton's Multimedia Encyclopedia" CD-ROM (1989) was the first multimedia encyclopedia. Grolier's earlier CD-ROM encyclopedia was not multimedia. The encyclopedia was founded by Frank E. Compton in 1922. Publishing rights to the F.E. Compton