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live load

American  
[lahyv] / laɪv /

noun

Engineering.
  1. load11


live load British  
/ laɪv /

noun

  1. Also called: superload.  a variable weight on a structure, such as moving traffic on a bridge Compare dead load

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of live load

First recorded in 1865–70