Building Material Priorities between Slabs

[Duncan]

Am I completely missing something or do two slabs with different building materials (priorites) not clean up when overlapped? This would be useful in a lot of places. Right now I'm using SEOs as work around, but I feel it bogs down the file at a certain point. Maybe calculating priorties would have the same live processing load, but at least it would be automatic.

[Steve Jepson]

you may need to show a screen shot of that. The materials that are not the same, and don't have the same priority number should not clean up.

[Duncan]

This is a screen shot with the composite slab selected. You can see that there's another slab (stone tiles) occupying the same space as the upper part of the composite. Everything else is noted on the image.

The materials that are not the same, and don't have the same priority number should not clean up.

I'm a bit confused by your statement. When I said clean up I meant that there should a clear break governed by the priorities. As this image shows there is not, and instead there's two slabs fighting to be seen on the surface (top and sides).

[Steve Jepson]

Yes. I know what you mean.

This can happen anytime two materials are in the exact same plane.

What's wrong with using SEO to have one subtract the other to get a clear break in the materials ?

[Steve Jepson]

.

[Duncan]

There is nothing outright wrong with using SEOs as the solution, as it is the way I would have slogged through the 200,000m2 (~2 million sf) of paving plans before AC17. But with the advent of building materials I got my hopes up that it would apply to buildings' materials i.e. slabs vs. slabs as a viable option - the most simple of all the tools in the toolbox. I don't want to gripe about it too much because there are still plenty of ways that the rest of the functioning of PBCs in 17 will be very helpful, it just seems like an obvious oversight. Could the 'junction order' parameter of walls and beams carry through to slabs? Would that even work?

Anyhow, one last point on workflow efficiency. Although I'm not modelling every single tile I often have to split the topping slabs for larger design moves. Every time this happens I have to redo the SEO on each piece that gets split off of the parent slab. When compared to drafting the topping slab contour and letting the PBC take over, all those little additional actions add up quickly for large scale projects. Thankfully, all remains status quo and is no more difficult than before. Only the expectations took a hit.

[Barry Kelly]

Slabs v walls, beams and columns has been sorted for PBC but unfortunately slabs v slabs still requires SEO.
Maybe in a future version this will be automatic as well as it seems to be something they are working on.

Barry.

[David Maudlin]

Duncan wrote:
Am I completely missing something or do two slabs with different building materials (priorites) not clean up when overlapped?

Image from page 1392 of the AC17 Reference Guide outlines how Automatic Intersections work, shows SEO for Slab/Slab intersections.

You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.

David