Box girder

noun

Definitions

Noun
  1. 1
    A steel beam with a hollow rectangular cross section; used for constructing bridges etc.

    "The Britannia Tubular Bridge is immediately west of Menai Bridge Station on the Holyhead main line. In design it consists of two continuous box girders of rectangular cross section, one for each track. It was opened in 1850."

  2. 2
    a beam built up from boards; has a hollow rectangular cross section wordnet

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