3D Helical Ramp for AutoCAD is a powerful and very easy to use add-on for AutoCAD 2000 or more recent.
This Product is available in Imperial Units or in Metric Units.
This 4 prompt Fast Load Autolisp (FAS) application, lets you build a complete 3D helical ramp, including sidewalls, landing bridge and center shaft. Just specify: Height per revolution, Landing height, inner radius and ramp width. You'll watch the ramp being built in seconds performing the following tasks: ramp, exterior sidewall, interior sidewall and landing bridge as separate solid elements. You can erase the ones you don't need. A center shaft can also be constructed by typing "shaft" at the command prompt.
After the ramp has been modeled, you'll see very helpful information for the design stages, such as ramp slope, length per revolution, total ramp length and xy plane landing position. According to these data you can try different slope alternatives by changing inner radius and/or height per revolution inputs. You can also get the volume of each element by means of the "Massprop" AutoCAD command. Should you need a cross-section, just join together all elements with the "Union" command, draw a rectangle on the Front UCS and then use the "Slice" AutoCAD command. A graphical tutorial is available for download. With your purchase you'll receive an interactive panorama of a ramp sample.