English translation: structural bearing beams/joists
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Explanation: Holzbalkenlage – layer of wood joists/beams. The plural of Lage is Lagen, not Lager. In house construction you don't use layers of beams
Lager – support, bearing, structural bearing
Lagerbalken – support beam, sole piece
Rähm – top plate
truss – Fachträger, Binder