Struggling with Connecting Multiple Vertical Ducts into One and Vice Versa
I've attached the rfa file for anyone who would like to take a look and offer insight. I think it might be better to take an existing fitting, such as the "Rectangular Wye - Curved - Transition" and adjust it to what I'm trying to create, or use that as a guide.
I essentially created 3 reference planes, Left Trunk, Right Trunk, and Branch Split. Then I made some parameters, trunk height and width, branch 1 width, and branch 2 width. Then I tried to create dimensions accordingly, so that the sweeps would adjust. The trunk width goes from the left trunk reference plane to the right trunk reference plane, and I made another dimension making both sides equidistant from the center. Then I made a dimension for branch width 1 goign from the left trunk reference plane to the branch split, and I tried to do the same with branch 2 width from the right trunk reference plane to the branch split, but it would not allow that, saying it would "overconstrain the sketch". Things seem to adjust somewhat correctly, but I need help getting all the dimensions to work properly, and setting it up so that when you load it into a project and try to place it on a duct, the trunk size will match automatically, and the two branches will start off as totalling the size of the trunk. If we can accomplish this, my next goal is to make other types of this one which would allow for 3+ branches. I appreciate any and all feedback/suggestions.
EDIT: I was also curious if there was a way to delete reference planes already in the template I began with. As you can see from the floor plan view, there are a ton of extra reference planes that I don't see the purpose of.
I think it might be better to take an existing fitting, such as the "Rectangular Wye - Curved - Transition" and adjust it to what I'm trying to create, or use that as a guide.
You have something much more complex than a wye. When it comes to more complex duct fittings, I usually start from scratch and categorize: duct fitting | type: multi-port so REVIT doesn't do anything funky with it.
As you can see from the floor plan view, there are a ton of extra reference planes that I don't see the purpose of.
Yeah. You got a lot of planes there. Not that anything is wrong with that, except they should be used in some way in constraining and modeling your fitting (or at least as a marker of some sorts).
setting it up so that when you load it into a project and try to place it on a duct, the trunk size will match automatically, and the two branches will start off as totalling the size of the trunk.
I recommend you abandon this goal (as good as it may be). Create a standalone fitting where you manually connect the main duct into.
Some suggestions:
- You have vertical ducts --- you should create connectors at top + bottom.
- Where the 2 ducts peel of at the 6th floor --- looks like a common large elbow then blue + purple ducts split (or 2 separate small elbows for blue and purple ducts)?
- A sketch of a section would be nice.
Here's my guess at what you're trying to achieve:
You have something much more complex than a wye. When it comes to more complex duct fittings, I usually start from scratch and categorize: duct fitting | type: multi-port so REVIT doesn't do anything funky with it.
I honestly don't think that I do have something much more complex than a wye, in fact possibly simpler than a wye. All I essentially want to do is have a connector, where one duct goes into the connector, and two come out, just like a wye, only no turns. You are proposing one fitting to take care of the entire area, whereas I just need this one fitting turning one duct into two, and the rest of the sections can be modelled using existing connectors such as elbows and straight ducts.
setting it up so that when you load it into a project and try to place it on a duct, the trunk size will match automatically, and the two branches will start off as totalling the size of the trunk.
I recommend you abandon this goal (as good as it may be). Create a standalone fitting where you manually connect the main duct into.
I don't think this goal is really that lofty, unless the fittings packaged with Revit are extremely difficult to construct. Tees and wyes that are already existing match to the duct you connect them to, and then you can change the width size of the 2 branches to fit your needs, which is all I would like this new custom fitting to do.
You have vertical ducts --- you should create connectors at top + bottom
I know I did not mention this in my previous post, but this fitting would be needed in multiple places, for both vertical ducts and horizontal ducts, which shouldn't matter, you can use the same fitting in both places. I'd prefer to create the fitting for a horizontal duct, and then just rotate it as necessary when placing it on a vertical duct.
I've included a very crude sketch, similar to the picture you posted, showing how you could use the fitting I am proposing in three different places, and then all of the rest could be modelled with elbows and straight duct. I tried to use similar colors to your model, and the grey planes would be the locations of my fitting. Again, please excuse how crude it is, I sketched it up in Paint, but I think it gets the idea across.
The red duct splits into red and yellow, the grey duct splits into blue and orange, and then the blue duct splits into blue and purple.
Nice sketch in paint. That's much easier to understand than your original sketch (to which I matched the colors) where it looked like you were going to split all ducts with 1 fitting. You're splitting the ducts twice (1. red into red + yellow, 2. grey into blue + orange) before the final split (blue into blue + purple). Here are (2) more attempts:
I couldn't get fitting X to split the duct into 2 ducts automatically. I could get it to automatically resize to the big duct and connect it to the end of the big duct.
Plan View:
Front View:
W1 is the user editable parameter and W2 is calculated by: W2 = W - W1. You don't see W2 because it would over-constrain the fitting. I recommend centering the fitting to the 3 default planes. Don't forget to constrain the dimensions of the 3 duct connectors.
