I would point out that it also does STAIR SECTIONS (it contains TWO commands, StairPlan and StairSec). Both ask for floor-to-floor height, what code criteria apply (e.g. tread & riser limits are different for dwelling units than for public places), offers appropriate defaults (which can be overridden -- e.g. you can force a longer tread than code minimum) for maximum riser, tread, stair width, and (in section only) railing height. Calculates actual number of steps required and actual riser height to make floor-to-floor distance. Options for one- or two- run stairs in both plan and section; in two-run, offers default half-and-half (or nearly) split of number of steps in each run, but user can specify; asks whether to align or offset nosings at landing; in plan also asks for overall stairwell width. In section, offers options for straight risers as in steel/concrete stairs, or projecting bullnose nosings as in wood stairs, and user can specify amount of cant/projection. Options in both plan and section for direction for stair to run; for two-run, in plan, which direction to turn at landing, and in section, whether to cut lower or upper run.