Copyright Goodheart-Willcox Co., Inc. Unit 12 Residential Framing Prints 217 • Run. The total horizontal length of the stairway is the run. The run should be the same as the number of treads multiplied by the tread width. • Rise. If the riser height is multiplied by the number of risers, the vertical distance between floors is found. This distance is the rise. There are many stair arrangements, three of which are shown in Figure 12-22. A modification of the long “L” style features winders (pie-shaped treads) instead of a landing. Using winders conserves space. Also, there are circular winding stairs (called spiral stairs) that gradually change direction as they ascend or descend. Rough treads are installed for use during construction. These are replaced when finish work is performed. Metal Framing Builders are using metal framing more often in both residential and commercial construction. Components are available for metal framing to meet all construction requirements, Figure 12-23. In addition to joists, wall studs, tracks, and blocking, many accessories are manu- factured to provide for any need in metal framing, Figure 12-24. Buildings constructed with metal stud framing are designed by structural engineers. • Tread. The tread is the horizontal member that forms the “step.” The distance between either the front or the back of adjacent stairs is the tread width. The number of treads in the stairway and the width of each tread are given on the drawing. • Riser. The riser is the vertical member that r provides the change in elevation between two adjacent stairs. The number of risers and the height of each are given on the drawing. There is always one more riser than the number of treads. Common Ridge Building line Gable Ridge Valley Valley jack Cripple jack Hip jack Common Hip Hip jack Goodheart-Willcox Publisher Figure 12-20. Terms used to identify various kinds of rafters. Rise Run Tread width Riser height Stringer Riser Headroom 6'-8" min. Tread Goodheart-Willcox Publisher Figure 12-21. Terms used to describe a stair.