cross beam

crossbeam

[kraws-beem, kros-]
noun
a transverse beam in a structure, as a joist.

Origin:
1585–95; cross- + beam

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World English Dictionary
crossbeam (ˈkrɒsˌbiːm)
 
n
a beam that spans from one support to another

Collins English Dictionary - Complete & Unabridged 10th Edition
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