Use this procedure to project the side of a stair to an existing polyline, wall, other AEC object, or solid. Objects to project to must extend the full length of the stair for an interior corner to project properly.
Projecting stair edges to curved polyline segments
Projecting stair edges to straight polyline segments
Projecting stair edges to a profile
Treads are extended using the line of the current front and back edge.