Produkt
KlappentextHigh Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! A lewis is one of a category of lifting devices used by stonemasons to lift large stones into place with a crane, chain block, or winch. It is inserted into a specially prepared hole, or seating, in the top of a stone, directly above its centre of mass. It works by applying principles of the lever and utilises the weight of the stone to act on the long lever-arms which in turn results in a very high reaction force and friction where the short lever-arms make contact with the stone inside the hole and thereby prevents slipping.
Details
ISBN/GTIN978-613-1-13484-5
ProduktartBook on Demand
EinbandartKartoniert, Paperback
Verlag
Erscheinungsjahr2010
Erscheinungsdatum09.08.2010
Seiten100 Seiten
SpracheEnglisch
Artikel-Nr.11757545
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