Rail. A horizontal piece in a frame or paneling.
Rectangular. Right-angled; having one or more angles of ninety degrees; a four-sided figure having only right angles.
Rib and collar. A form of roof truss in which the collar between rafters is used as the thrust bearing for the ribs which project up from the hammer beam.
Router. A tool for cutting grooves or recesses.
Saddle joint. A form of connection in which one part has a portion cut away, resembling a saddle, and in which the part to be attached has its end cut so as to fit the saddle thus formed.
Scarfing. The cutting away of the ends of timbers to be joined, so the two parts on lapping will unite evenly.
Scissors beam. A form of truss, in which there is a pair of interior braces formed like shears, and secured to the main rafters themselves.
Score, Scored. Shear; cut; divide; also notching or marking.
Scratch awl. A sharp-pointed tool, with a handle.
Scribe. To cut, indent or mark with a tool, such as a knife, awl or compass, so as to form a cutting line for the workman.