The angle of inclination or slope of a member or structure, expressed as the ration of the vertical rise to the horizontal run.
Riser
(1) Vertical boards behind the steps of a stairway going upward. (2) Vertical water supply pipe.
Riser
A vertical member between two stair treads.
Riser diagram
A basic design document showing electrical wiring and devices.
Risk
Uncertainty or variability. A chance of loss. As to real estate, the fluctuation in sales or profits and the likelihood of declining value.
Risk-free rate
Interest rate on the safest investments such as federal government obligations.
Rivet
A metal fastener used to permanently hold two pieces of material together. The rivet is inserted through holes in the material and the end is deformed to hold it in place.
Rivet hammer
A hammer used to tighten rivets against the material they are holding.
Rivet set
A metal tool used with a rivet hammer to secure a rivet in place by deforming the end.
Riving knife
The riving knife follows the blade to reduce kickback by keeping the kerf open. Lowered during crosscuts, it acts as a partial barrier to the blade's leading edge. Often used on table saws or radial arm saws.
