#structural_member  support that is a constituent part of any structure or building
  supertype:  support.device  any device that bears the weight of another thing; "there was no place to attach supports for a shelf"
  subtype:  beam  bracing  plate.structural_member  riser  sill  tread  upright
  part of:  physical_structure__structure__construction  a thing constructed; a complex construction or entity; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"

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