External Reinforcements

[cadbyken]

Been playing with External Reinforcements for some time but now I need to get it setup this for rectangle, round, and oval.

The problem I have having is how/where do we tell the shop where to locate the stiffeners for a non-companion flange situation. The diagram shows either 3"; 3" and 32"; or 3", 21-3/8", 29-3/4"  from the end.

My understanding is each is a separate stiffener but not sure how to get the quantity and locations correct.  I am playing with adding the quantity and location in the name to make it easier but want the quantity for reports.

(1) 2x1/8 @3"
(2) 2-1/2x1/8 @3";@32"
(3) 2-1/2x1/4 @3";@21-3/8";39-3/4"

[cadbyken]

Then there is also the issue that I don't see a Stiffener field for round...

[CAMeleon]

As far as rectangular goes - you're on the right track - the spacing will determine your quantity of stiffener sets. The breakpoints will dictate what one set of that stiffener will do *IE 2 MPT 1 JTR etc.
If your spacing was 30" on a 60" joint 1 set would suffice, giving you 2 and 1. If you went to say 76 long, you would now have two sets, 4 MPT, 2 JTR.
Correct on the no stiffener option for round within the spec - very difficult if you're wanting a ring/flange to act as reinforcement.

Oval - that's its own beast. Looks at span for reinforcement breakpoints. Major-Minor and then it finds a breakpoint in the spec that has span as a major and assigns a stiffener there.

I'd dial in rectangular before even trying to venture down the oval route, because it will be a battle.

[cadbyken]

I can see how it works when they are equally spaced but not when trying to make it work from one end. Then there is the oddity of one being at the one end and spaced down the line of duct. Thankfully we don't normally go beyond 60" but I can see where I would need to go with the spacing + length option in the Specification.  What a can 'o worms this is.

[CAMeleon]

Ahhh yes, it is a headache, but if you can get stiffeners dialed in everything else seems less complicated!
Good Luck!

[VirtualPilot]

Been playing with External Reinforcements for some time but now I need to get it setup this for rectangle, round, and oval.

The problem I have having is how/where do we tell the shop where to locate the stiffeners for a non-companion flange situation. The diagram shows either 3"; 3" and 32"; or 3", 21-3/8", 29-3/4"  from the end.

My understanding is each is a separate stiffener but not sure how to get the quantity and locations correct.  I am playing with adding the quantity and location in the name to make it easier but want the quantity for reports.

(1) 2x1/8 @3"
(2) 2-1/2x1/8 @3";@32"
(3) 2-1/2x1/4 @3";@21-3/8";39-3/4"

AFAIK, Round and Oval Reinforcement is not implemented on the software, unless it has been added on REL 25 or 26...

[PipeFitter72]

For Oval we do it 100% in a script. SMACNA calls it out by flatspan, but the program runs on width and depth.

[cadbyken]

Can you give me an example of what you use the script for? I can write it just trying to figure what settings/verbage/etc. Since we are 100% Revit, I will have it ran at CAM.

[PipeFitter72]

For example we use if then statements like
DIM ST = stiffener
DIM W= width
DIM D = depth
DIM FlatSpan = ABS(W-D)

If FlatSpan < 12 then ST = "OV1" else
If Flatspan >=12 and < 20 then ST = "OV2" else
If FlatSpan >= 20 and < 32 the ST = "OV3"
endif

This off the top of my head. But you get the idea. You just have to have the stiffeners in your database to be assigned.

Our developer actually set up an array  where we set gauge, stiffener type, and quantity by pressure class. Honestly I can read it and modify it, but I could not start it from scratch.

[cadbyken]

That helps me a lot. Thanks!