3D Spiral Stair lets you build complete, high-detail 3D spiral stairs including center post, post plate, tread supports, balusters, and landing and optional riser closure.

This 2 prompt Fast Load Autolisp (FAS) application, lets you build a complete, high detail, 3D spiral stair, even in Spanish style. Includes center post, post plate, tread supports, balusters, landing, and optional riser closure.

Just specify floor height and stair diameter. You'll watch the stair being built in seconds. Available settings include 5 attractive architectural styles, several post diameters and a Maximum Riser Height feature, which the program uses for calculating the best configuration to fit your project needs.

After the stair has been constructed, at the command prompt you'll see very helpful information at the design stages, such as number of risers, final riser height, height from tread 1 to tread above, and xy plane landing angle.

3D Spiral Stair is available for metric and imperial units. A graphical tutorial is available for download. With your purchase you’ll receive an interactive animation Spanish style stair sample.

• 10 styles of balusters, 3 styles of tread supports, 3 types of treads, 2 sizes of handrails.
• Optional riser closure.
• Settings chart.
• Options for post diameter and maximum riser height.
• Each element has its unique layer.
• Metric (m, cm and mm) and Imperial units.
• Final model suitable for rendering.
• Imperial and Metric Graphical Tutorials.
• AutoCAD 2000+ and ADT compatible.