straining piece, beam
n
(Fine Arts & Visual Arts / Architecture) a horizontal tie beam that connects the top of two queen posts of a roof truss ...
Queen-post truss (queen truss): A roof truss having two vertical posts between the rafters and the tie beam; the upper ends of the vertical posts are connected by a straining piece (such as a tie rod or cable) ...
 See also: Architecture, Beam, Truss, Rafters, King Post
  
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