Vertical Duct Offset

[vewright]

I am laying out a dust collection duct system. I need to offset the main vertically, but not with a vertical riser. I need to offset with a duct at an angle to horizontal. Revit seems to be stuck on vertical risers for offsets.

I could easily draw what I want if I could draw ducts in a section or elevation view. However, the duct choices are grayed out.

I can draw ducts in a 3D view, but, again, Revit won't connect two 45 deg elbows with a straight section of duct--it insists in adding a vertical riser.

[briangemmell5120]

I agree that not being able to draw in section is a pain but there is a
workaround for what you are trying to do.

Draw to lower elevation duct up to where you want it to rise, draw the
higher elevation duct to where you want it to fall. Now draw another piece
of duct between the high and low side (elevation doesnt really matter).
Don't connect the middle piece to the other 2.

Go to your section view and you will have:

______ ________High
Low _____

Grab one end of the middle duct and drag it until it is at a 45 degree angle
(or whatever fits). Extend the length of the middle duct so one end is
below your lower duct and the other end is above your higher duct. Then use
the trim tool to make your elbows.

/ _______ High
Low____ /
/

I know it sounds like a lot but it does't take long to do. Even though you
cant draw it directly lots of the other tools work (give Routing Solutions a
try if you are feeling frisky). It would be nice to be able to draw in
section but the whole work plane issue comes up so I kind of understand.

wrote in message news:5867090@discussion.autodesk.com...
I am laying out a dust collection duct system. I need to offset the main
vertically, but not with a vertical riser. I need to offset with a duct at
an angle to horizontal. Revit seems to be stuck on vertical risers for
offsets.

I could easily draw what I want if I could draw ducts in a section or
elevation view. However, the duct choices are grayed out.

I can draw ducts in a 3D view, but, again, Revit won't connect two 45 deg
elbows with a straight section of duct--it insists in adding a vertical
riser.

[vewright]

Well, BrianG, you are an inspiration. You don't even have to worry about extending the diagonal piece above the upper duct or below the lower duct. The trim tool inserts elbows, and a Tab shows that it's all connected.

I'm afraiid I don't agree with the work plane point, though. You can define a reference plane parallel to the XZ plane or the YZ plane, and you should be able to draw on it.

[vewright]

Routing solutions is also a reasonable approach. If you draw the diagonal duct, routing solutions comes up with the desired result immediately. If you don't draw it, routing solutions may not come up with a 45 degree duct (it didn't for me), but if you display the best solution, you can drag the control points to achieve the disired result, i.e., an offset with 45 deg elbows.