Straight A straight staircase can be designed three different ways. The first design goes from top to bottom in a straight line. The second design is L shaped. It goes straight up and turns either right or left at a landing. The third makes a T; it goes straight up and turns both right and left from a landing. Spiral A spiral staircase coils around on a fixed axis. Often a pole from the floor to the ceiling and the stairs wraps around it.
Stair; Spiral Stair 3D DWG Model for AutoCAD
