In most projects, we have an Exterior Shell model, which has the exterior walls, which COULD contain the inner finish ( gyp bd., etc.)
Then, we also have an Interior Fit-Out Model, which contains the interior walls. Whether to include the inside finish on the exterior walls in which of these models is usually decided
with the project team, including the Contractor--depending on which Bid Package the interior face/finish will be included in--Exterior Shell, or Interior Fit-out.

I've not had to create separate files other than for different disciplines so all walls are in a single model. Even if I had, I would still have the same question as above.

e.g. A project I am working on has SFS panels used the structural element at both external walls and internal walls (@ party/separating walls). I could create a single wall type or I could duplicate it and give a different prefix in the wall type naming convention e.g. INT- or EXT- etc... Similarly, where these SFS panels are used, they have a lining arrangement of 2x 15mm GWB applied to both sides (only 1 side in an external wall condition) and again I could have 1 wall type of this lining configuration for use at an external wall and a duplicate for at an internal wall.

I wouldn't have thought to take this granular approach with wall types but I'm sure I've seen others do it and I'm wondering if its really worth the hassle.

I have completely different wall types for Interior and Exterior, yes.

But i dont break *linings* in to their own wall types. I break FINISHES out in to their own wall types.

I use different filters for INT and EXT and FIN-INT and FIN-EXT walls, so breaking them out makes sense. Linings, gyp bd, etc... Doesnt make any sense to do, for me.

EDIT: And i would never have an EXT and INT model, for any real reason that i can think of, except sheer project size. And by sheer size, i mean LITERALLY 120 stories or taller.

EDIT: We probably wouldn't either---except that the Owner and CM require it, with separate Bid Packages for Exterior Shell and Fit-out, with Enhanced Integration as part of the Contract.

Makes sense. If they were entirely different sets of drawings, id probably do it too. Id hate it, but id do it, lol.

Would you consider Parts for this separate model if the linings where in the main?

Ah the penny drops, I must've been getting my wires crossed with what I thought I had seen. Good to know I can keep my wall types down to a reasonable amount!

Nope............

I apologize- I dont understand the question.

If i were doing an Exterior Model and an Interior Model (because there were different sets of architectural documents all-together), the exterior walls (including the interior face of sheathing) would be in the Exterior Model. The Interior Partitions would have all of their Sheathing in them, in the other model. SIDE NOTE: Ive done a few retail projects, where OUR client (Building Owner) wanted the interior face of sheathing to NOT show in the Phase 1 drawings. Why? Even though it was part fo the "Core and Shell," they wanted it to show up in the INTERIOR drawings (White Box Fitouts), essentially, so they could change THEIR tenants for the cost of that sheathing. Here is the thing with that: You need that sheathing in the exterior walls documents, for the wall to comply, envelope wise. So (to me) the wall (and sheathing) goes in the Exterior Model, in that case, and its the owners issue, how they want to handle that. Its a stupid problem, in my opinion. Tell the Tenants you are charging them for it anyway, and if they dont like it, tell them not to move in.

But i wouldnt put my name on a set of drawings where the exterior envelope wasnt complete, because "the tenant is required to finish it." Seems shifty, to me.

The ONLY thing i recommend Parts for, is splitting things for Construction Sequence Modeling, for software like Synchro. And even then i only recommend Parts if you have a healthy level of Dynamo or API capacity. I don't endorse parts (At all, in any situation) for Architectural Modeling. There aren't exceptions, in my opinion.

Not sure if i answered your question. I might be super overtired, so its possible i'm just not comprehending.