How to Make (Non-Adaptive) Fences Follow Topo

One of the very first Dynamo blog posts I read demonstrated how to place an adaptive fence component so that it would follow Topo. At the time, I thought it was an interesting concept, but not overly useful since I typically use non-adaptive fence components and fences will frequently step (instead of slope) with grade change.

However, not all fences are stepped, and I recently decided to take a look at trying the same concept on a non-adaptive fence. It is quite a bit more complicated than the adaptive version, but there are several reasons why you might not use an adaptive fence component and the concept can also be used to place a stepped fence.

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Ornamental Metal Fence

Ornamental metal (wrought iron) fences are one of the most varied types of fences. They can have various combinations of pickets, rails, and all sorts of different ornamentation. As such, this ornamental fence family is the most complex of the 3 fences families posted thus far, though it is still rather basic.


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Parametric Wood Fence

It is easy to forget how often fences are used on projects. If nothing else, they are often used to enclose dumpsters. Here is a wood fence, the first in a line of fences and gates.

Any family can be as simple or complex as you want it to be. I prefer creating more complex parameter-driven families that can be used to create many different types. So in this fence family the height, length(span), post, rail, picket size, and spacing are all entirely adjustable.

Since this is a wood fence, the length of the fence will actually adjust based on the picket size and spacing. You can see the actual length in Length_Actual.


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