saddle joint



  • A joint in sheet metal roofing, in which one end of one sheet is folded downward over the turned-up edge of the adjacent sheet.
  • A stepped joint in a projecting masonry course to prevent the penetration of water.
  • A coping stone with its top surface sloped from a high line in the center to either edge.


  • noun a synovial joint where one element is concave and the other convex, like the joint between the thumb and the wrist