Ductwork connection at 45 degree angle issues

[Anonymous]

Hi All

Could someone help me with a good way of creating a connection which sets off the main duct run at a 45degree angle like picture shown?

at the moment im having to go into section, draw a 45 degree detail line at the quadrant of the main duct side, move it half the duct dimension, so it sits in the ducts center(as revit won't find the duct center), then i can draw the duct along that line with ducts then i can connect it all up, now this dont work all the time and is highly fustrating. people in the office think im a lunitic?

Is there an easier way? 

Thanks for the help. sorry if posted some where, i cant find anything.

Guy

[Anonymous]

Yeah Autodesk disabled finding the duct centerpoint in R2012? I have resorted to using detail lines to align the angled duct, then extending that duct into the main hoping it creates a tap.

A "workaround" is you can create a view template override that shows the duct centerlines and then you can align to the duct centerpoint in section, without details lines. Use the tab feature to select the center point. PIA as the project gets bigger, the view template override takes a long time to adjust the view. 

[chrisplyler]

Um... Revit 2015 here... I'm able to select round duct centerlines by default.

[Anonymous]

Yes, that is why I mentioned that Autodesk disabled that feature in 2012. So obviously it wouldnt work in 2015. You have to use a view template override with duct centerlines turn on. That is how I do it in 2015. There are still instances where this "work around" doesnt work though.

[chrisplyler]

I'm telling you that it DOES work in 2015, without me having to set up any special template override.

[Anonymous]

OHHH sorry! Then you have centerlines already turned on in the view template. Gotcha.

[chrisplyler]

Object Styles set the default global visibility settings throughout a project.

View Graphics set the overrides in specific views.

View Templates establish a uniform set of view graphics and other items that may be applied across multiple views.

If I'm able to select duct centerlines by default, without making any changes to View Graphics or View Templates, then I must have duct centerlines turned on in Object Styles.

[Anonymous]

the thing is it does work when a piece of duct is open, but when theres a bend on each end it dont.

pants really!

[chrisplyler]

Modify the extents of your section so that it doesn't see all the way to the elbow and try again.

[www.TechRoom.bg]

You can use trim to connect element without try to find there center or someone else

[Anonymous]

That doesn't make any difference Chris.

[chrisplyler]

Oh wow gookeeper, you're right. I thought surely that would work.

So I've experimented and found this workflow that might help.... Draw the desired tap not from the center of the sectioned duct, but from the edge of it, as shown here.

Then use the trim tool, at which point the sectioned duct's center does become selectable, to make it connect. Result is a correct tap, resulting in a single system, created in section view, even on ducts with elbows at the ends.

[Anonymous]

Just model it in plan view and rotate it in section...See this example

[Anonymous]

Hi Jrobker

Thanks for the example, this is all well and good, like i said before only works if the duct your connecting to has no other connections or parts, which will need deletely before you can select the duct center.

Thanks

Guy

[Anonymous]

Thanks for the description, but im abit lost what your doing (Draw the desired tap not from the center of the sectioned duct, but from the edge of it, as shown here.)

thanks

[Anonymous]

"Thanks for the example, this is all well and good, like i said before only works if the duct your connecting to has no other connections or parts, which will need deletely before you can select the duct center".

Now I am not sure if I am understanding what it is your saying. I can rotate as many parts, fittings, equipment or anything for that matter. The only time I would need to delete it is if that specific element doesn't need to be rotated. 

"Thanks for the description, but im abit lost what your doing (Draw the desired tap not from the center of the sectioned duct, but from the edge of it, as shown here.)
thanks"

I am selecting all of the elements that I want to rotate. I hit the spacebar to select the desired roation point that I want (center of round duct). Then rotate.

There is no diference where you model the duct from center or edge. 

what did you mean by "as shown here"?

[chrisplyler]

I mean that in section view, if the duct center isn't selectable because there's a fitting down on the end of it, I'm able to select the perimeter of the duct to start drawing a new duct from. You can see in my image that the smaller branch is drawn from the perimeter instead of from the center of the larger duct that is in section view.

Then I'm able to grab the end of that smaller branch and drag it up to the center of the larger duct, whereupon the connection is made and the appropriate tap or tee is generated.

[Anonymous]

---

@chrisplyler wrote:

I mean that in section view, if the duct center isn't selectable because there's a fitting down on the end of it, I'm able to select the perimeter of the duct to start drawing a new duct from. You can see in my image that the smaller branch is drawn from the perimeter instead of from the center of the larger duct that is in section view.

Then I'm able to grab the end of that smaller branch and drag it up to the center of the larger duct, whereupon the connection is made and the appropriate tap or tee is generated.

---

If you cannot select the center point of duct because of an elbow on the end, simply type SC for snap center.

[Anonymous]

earlier in the post i showed some images, if the duct your connecting to already has bends on them at one end or both, you loose the snap to center of ducts, and sc shortcuts dont work either. the only way for the center snap to appear in section is to delete any bend or parts that are already on the duct first or do it like chris has mentioned.

i dont think there is an easier way of doing this.

thanks all i appreciate your time helping with this.

Guy

[chrisplyler]

I hope my way is easier than deleting and later remaking all the fittings!!!