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Best way to deal with structural wall/floor intersections

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Here's something I come up against quite often. See attached example file and screenshots.

 

When you have walls which span between floor slabs, as per the thinner wall in my example, VW knows how to deal with the threshold at a door opening. The floor is simply continuous.

 

But it's different where structurally the wall is continuous through several stories - constructionally, the wall is continuous and the floors join to each side. You can draw it like that - different floorslab each side. That's fine until you want a door or opening through that wall, because when you introduce an opening, the threshold is then just a slice through the wall buildup.

 

You can try and cheat and draw the floorslab continuous, like in my screenshots, but then you have that Z-fighting where the opening and floor surface are on the exact same plane. Sometimes I deal with this by making the door opening 1mm lower, which gets rid of that visual annoyance in OpenGL but that is messy, and it still isn't right in section.

 

Shaping the floorslab around the opening profile makes the section correct where there's not an opening, but doesn't solve the other issues.

 

Is there a "proper" way of doing this? The only way I can find is to build the wall in 3 stacked layers, one the thickness of the floorslab, (see my third screenshot) but that is very tedious and complicated.

 

 

1453101348_ScreenShot2020-08-12at12_08_57.thumb.jpg.026a46daa502044eaf3322a6a992e04c.jpg

 

 

464764192_ScreenShot2020-08-12at12_09_06.thumb.jpg.14e2e35ac657ce3aa8b3b92fd38ba23a.jpg

1227878434_ScreenShot2020-08-12at12_29_48.thumb.jpg.592cdde2223b6cb391d0f7091fb95cb3.jpg

wallint.vwx

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Posted (edited)

I set my Doors to extend downwards through the finish floor.

So the Door "frame" (Jamb ?) sits on the structural Slab like

in real world (?)

I bring the Leaf up to finish floor top by a Threshold, that I my

deactivate by hiding its Class.

 

I usually fill in "Finish Floor Slab" objects manually under each

Door later.

 

My Wall Styles for exterior Walls usually start from the bottom

of the structural slab, at least the insulation package and

All Wall tops are bottom of slabs above.

 

Slabs are set to intrude structural Wall Components.

That mostly works.

In special case like your balcony I may need a separate slab

style with different connection setup though.

Also it gets difficult when connected Walls mix up inner and

outer side. E.g. for a Roof Slab when Attika Walls meet a

extended Stair or Lift Case.

Edited by zoomer

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Posted (edited)

Thanks @zoomer

 

I can see the logic of this approach. And the "invisible threshold" is a good way to make the door "opening" deeper than the door itself.

 

The drawback is that it then seems inevitable that there will be lines visible at each threshold, in plan. At least at smaller scales, I like to be able to draw a floorplan that does not show any lines at door thresholds.

 

I tried a version where the entire slab "flows" through the opening - so the invisible threshold is the same height as the entire floor slab. This is not really constructionally correct, as the floor needs either to be shaped around the jamb, or intersect with the jamb, but this workaround  might be good enough for me in some circumstances.

 

804221746_ScreenShot2020-08-17at12_15_05.thumb.jpg.8fead91a2e9f751dac9a3cf7b8b337d2.jpg

 

(My example is not intended to show a balcony, just a situation where a floor slab crosses over an internal structural wall, so an internal wall that is continuous vertically, and normally built before the floor slab is put in place)

Edited by line-weight

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34 minutes ago, zoomer said:

 

Slabs are set to intrude structural Wall Components.

That mostly works.

 

 

Do you mean by this, you just draw them so they intersect each other?

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Auto Bounding would normally cut off the Wall.

So no intersection.

But I think I have my Wall Components to cut Z set to top of structural slab

anyway.

 

I meant that Auto Bounding on Components level works reasonably well in

many situations, often even where I expected Auto Binding to fail.

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12 minutes ago, line-weight said:

The drawback is that it then seems inevitable that there will be lines visible at each threshold, in plan. At least at smaller scales, I like to be able to draw a floorplan that does not show any lines at door thresholds.

 

I tried a version where the entire slab "flows" through the opening - so the invisible threshold is the same height as the entire floor slab. This is not really constructionally correct, as the floor needs either to be shaped around the jamb, or intersect with the jamb,

 

 

Yes, of course I am also just working around issues.

I am not thinking that VW offers the most ideal solution for common BIM situations.

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10 minutes ago, zoomer said:

Auto Bounding would normally cut off the Wall.

So no intersection.

But I think I have my Wall Components to cut Z set to top of structural slab

anyway.

 

I meant that Auto Bounding on Components level works reasonably well in

many situations, often even where I expected Auto Binding to fail.

 

Ah, I see. I don't generally use Auto Bounding, because I expect it to fail. But maybe I should try using it a bit more.

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Yes, you should play with it.

 

AFAIK

I had a building where a lower Story partly extended the boundary.

So I had to add a set of lower attic Walls in front of the outer Wall

to fit the lower Story, basically a Roof now. Didn't expect that to work.

AFAIK the Slab also cut the Wall's outer insulation components

automatically where the slab extended the main Wall.

 

On the other hand I was not able to auto bound my roof insulation

package slab because a stair case at the outer Wall or building edge

extended the roof.

On one hand the interrupted attic walls are not valid for bounding.

On the other side, if you try to include the stair case walls, you

deal with a) flipped Walls and b) invalid tripple Wall connections,

butted vs. mitered combinations.

 

 

But there are so many common but special situations in BIM where

you can spend hours to play with VW PIOs until you find a way

to make it work though or to realize it will never work.

Like connecting 4 different Walls at a single edge. Or Edge Windows

along the whole Wall length that reach to the bottom of the Wall

will make the top part of the Wall disappear and such.

 

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