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
Chinese encyclopedia times the amount of material in the "Encyclopædia Britannica Eleventh Edition". Although most scholars consider the 222 CE "Huanglan" (see below) to be the first Chinese "leishu" encyclopedia. Needham, Lu, and Huang call the late 4th to early 2nd centuries BCE "Erya" the oldest Chinese encyclopedia, and consider its derivative literature (beginning with the "Fangyan" and "Huanglan") as the main line of descent for encyclopedias in China. The c. 239 BCE "Lüshi Chunqiu", which is an anthology of quotes from many Hundred Schools of Thought philosophical texts, is another text sometimes characterized as the first Chinese "encyclopedia". Although its content