truss beam
A horizontal structural beam consisting of a long piece of timber or metal, often reinforced by a metal tie rod; or of top and bottom chords made of steel, timber, or other material, joined and braced by inclined metal rods.Used to support a heavy we
en-US/ˈtɹʌs ˈbim/
en-GB/ˈtɹʌs ˈbiːm/