The total rise (real world units) is 119 1/8'. This could be scaled (slightly, +/- 6-8'), if desired, to achieve a different rise for a different application. They were originally designed for a 9' ceiling (sitting on top of finish floor, and rising 108 5/8' (wall), + 9 1/4' (joist), + 1 1/4' (subfloor/finish floor at top). The last tread rests upon the finish floor of the second floor at 119 1/8' above the first floor finish floor. Can be used as a freestanding unit, or, with one or both railings hidden/deleted for a one-sided walk, with walls on one or both sides. All 8 objects named appropriately, and uv-mapped for the wood and fabric textures which are included in the zip file. Inner radius of curvature = 63 1/4' Outer radius of curvature = 110' Walls shown in the previews are NOT included in this model. They were (simple rectangular prisms) constructed only to give a backdrop for the model.