We found 5 dictionaries that define the word box beams:

General (4 matching dictionaries)

1. box beams: Merriam-Webster
2. box beams: Collins English Dictionary
3. box beams: Vocabulary.com
4. box beams: TheFreeDictionary.com

Computing (1 matching dictionary)

5. box beams: Encyclopedia

(Note: See box_beam as well.)

Definitions from WordNet (box beam) ▸ noun:  a beam built up from boards; has a hollow rectangular cross section ▸ Also see box_beam ▸ Words similar to box beams ▸ Usage examples for box beams ▸ Idioms related to box beams ▸ Wikipedia articles (New!) ▸ Words that often appear near box beams ▸ Rhymes of box beams ▸ Invented words related to box beams