StructuralFraming.BeamByCurve doesn't work for 3D curve?

Revit
1

I have 6 3D curves (helix) that I need to convert them to Structural member.

I tried polycurve and nurbcurve, none of them works.

How to fix it?

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2

Hi,

It is correct that a Structural framing cannot be assign to a Helix-like curve. Revit can only model structural framing elements on Planar curves.

A way to fix this is to segmentize the curves in lines and then create structural framing elements.

Another way is to create the framing geometry using a profile + the curves and Sweep it into a Solid. Then you can create an element from the solid by parsing it into a Family.

3

Thanks for the suggestion. I use lines instead of curves.

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But there is another issue:
the pipes (steel pipe 273*10 family that built in the revit family library) are discontinued, although their axis are continued.
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4

Just placing the Framing elements is not enough. You also need to change the Z Justification parameter so the placement line will be in the middle of the Framing. Revit now tries to connect the beams which doesn’t work.

5

I change the Z Justification parameter to “origin point” or “center line”, but they are still discontinuous.

BUT if I use StructuralFraming.BraceByCurve, they are continuous.

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1 Like
6

As seen in the picture, this is the best result you will get by using Structural framing elements. I don’t know if Revit is able to join them nicely.

As I suggested in the first post, you can also use the Sweep principle.
This has advantages and disadvantages. Let me know if this helps :yum:

CreateHelixGeo
CreateHelixGeo1388Ă—805 110 KB
CreateHelixGeo.dyn (46.7 KB)

1 Like
7

Thanks for the dyn, I need it for my other project.
In this project I use framing instead of sweep, because I want to use the model for other purpose, such as BOM, structural analysis.

8

Aaahaaa, well have you already checked the Analytical model with the segmented Structural Framing Elements? This one is perfect for analysis, but the architectural model is not correct. A structural analysis program always uses a simplified model of the Architectural model. With revit you have to choose, use it for structural modeling or for architectural. Or model an architectural model with a symplified structural model

9

Is it possible to apply material to the sweeped geometry?
If it’s possible, how to do it?

10

Via subcategories. As I did in my graph