box beam

noun
a beam or girder built up from shapes and having a hollow, rectangular cross section.
Also called box girder.
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World English Dictionary
box beam
 
n
another name for box girder

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
Use section properties given on the prestressed concrete box beam standard drawings.
The laminated wood box beam is the standard breakaway support system for large ground-mounted signs.
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