From Longman Dictionary of Contemporary Englishcrosspiececross‧piece /ˈkrɒspiːs $ ˈkrɒːs-/ noun [countable] TBCsomething that lies across another thing, especially in a building, on a railway track etc
Examples from the Corpus
crosspiece• On the crosspiece he had painted the words: Oliver Bean.• The typical crosspiece of the Frankish spear implies the use of the weapon from horseback.• The filter was constructed as shown in the diagram and then stood on the wooden crosspieces on top of the vat.• A carpenter from Sam Son who had prepared the wooden crosspieces for the test raft was one member of the test-raft crew. 