How to draw a spiral curve in autocad

AutoCad Civil 3D. Easily the most used program in the industry, Civil 3D is a civil engineering drafting software with a multitude of design, analysis and simulation tools for civil engineering design.

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How to draw a spiral in microstation? How to draw a spiral staircase in plan? Specifies the spiral type. Specifies whether your design includes a spiral either before a curve or before a Spiral Out. Specifies the length for the Spiral In. Specifies the A value for the Spiral In. Specifies how a curve is inserted: either with or without the Spiral In, with or without the Spiral Out or by itself.

Use a helix as a sweep path for the SWEEP command to create springs, threads, and circular stairways. A curve may be simple, compound, reverse, or spiral figure l. Compound and reverse curves are treated as a combination of two or more simple curves, whereas the spiral curve is based on a varying radius. The simple curve is an arc of a circle. A spiral is a curve formed by a point revolving around a fixed axis at an ever-increasing distance.

It can be defined by a mathematical function which relates the distance of a point from its origin to the angle at which it is rotated. Some common spirals include the spiral of Archimedes and the hyperbolic spiral. A spiral is a coil or curl, like the shape of a piece of hair wound around your finger, a Slinky toy, or a corkscrew. A curve forming a series of circles that become gradually larger or smaller is one kind of spiral.

At the Command prompt, enter ReverseOrCompound. Select the arc object nearest the end to which the new compound or reverse curve is to be attached. Specify whether to create a Reverse or Compound curve. Specify the start point. I am needing to recreate a highway centerline alignment in order to calculate angle points on a property boundary.

I know the centerline stationing that corresponds to the angle points, but i don't know how to put together the centerline. Unfortunately whover laid out the centerline originally used a spiral transistion curve.

I have a record survey that has the spiral curve data and the centerline bearing at the PS and PT, what is the best way to draw the curve in autocad? I have been looking into old DOT refrences on spiral curves, and i am pretty sure i can do it the old way with linework and my calculator. THere has got to be a better way though Below is some of the given information:. I think its best if i attach a tiff image of the survey as well, as it's always easiest to get a grasp on this kind of stuff with a picture to help explain.