Top of Column

[david_peterson]

So after a while I figured out how to slope my roof steel. I created a reference plane, gave it a name, made it current and put in some beams. Now I need to get my cols to stop at this reference plane, but I don't see that as an option. Any Ideas.
Thanks in advance.

[david_peterson]

Nevermind, stupid me. I forgot about the cut geometery tool.

[Scott Hammond]

Hi David,

Do you know that you don't need to create reference planes to slope members anymore?
You can specify end offsets now in Revit Structure 3.

Also, to attach you columns to a reference plane, you don't need to Cut Geometry, Just select the column, and on the options bar, you can pick attach/detach. This allows you to attach a column to a plane, or framing. You can also specify how to cut the column (min/mid.maximum intersection).

[david_peterson]

Scott, how dose this affect the analytical model? When I did use a reference plane, and attached to cols to it, the graphical col went up to the reference planes, but the analytical model stopped at the 3rd level. So if we were to use this method, it would seem that we would have to adjust all the analytical line work as well. Unless I just made a rookie mistake, which is totally possible.

[Scott Hammond]

David,

Not a rookie mistake!
This is actually one of the strengths of Revit Structure. While the analytical model is simultaneously created with the physical, is it independently editable.
So in this case, the physical model extended, but if you look at the "analytical projection" it is set to "Level_". The reason the default is "Level" is so that all of the framing and slabs will be at the same elevation; when they are exported to analysis, everything is attached to the diaphragm.

So, to change this, just select the columns, and change the "analytical projection plane" to "Top of column".

This feature gives you the flexibility to model the structural with realistic physical requirements, while making analytical assumptions based on engineering judgement.