Hiding Intersections of Geometries

[Seychellian]

Does anyone know a way to hide the lines intersection of geometries that does not involves manually going through the model and "painting" invisible model lines over them? This just feels like such an un-BIM solution to me. The minute there is a change you have a whole bunch of invisible lines floating around the drawing which is really not ideal. Also the rounded ends often do not cover the lines properly and it looks bad.

I am keen to know how other people approach this as seeing slab edges on the facades of buildings really is an eye sore for those of us who like our drawings to look good. 

[constantin.stroescu]

• When you create the Floors take care their border not to snap to the exterior face of the wall but to keep a certain offset from it , as in real life ( you can achieve this , now by Editing Boundary) Think that the wall has plaster on its exterior face and the structural element (floor) never goes into it..
•  if all these do not work for an unknown reason ,then Linework can be an ultimate solution...

[georgehobel]

exactly... i try to build my models the way they are in real life.  If you hold the floor edge back to flush with the wall framing, the floor will not show through the sheathing layer.  

@constantin.stroescu what about when youre looking down on a roof plan, and joining roofs show weird intersection lines.. what's a good solution for that?  I will post a new thread...

[barthbradley]

You can use the Linework Tool on these lines, @Seychellian . Type LW.  Change from "By Category" to "Invisible".

[georgehobel]

yeah... LW would work here also, but then you still have inaccurate section drawings...

[barthbradley]

Linework Tool just affects the changes made in the active view. It doesn't affect linework other views. If the Section View needs cleanup, then use the tool again in that view.  

In this case though, Join Geometry usually gets rid of the band joist lines for me.  Maybe  the band joists aren't Aligned flush with the wall faces.  If they are, and are the same material, those lines should be removed upon Joining.  

[georgehobel]

what i mean is... if a floor is improperly placed, and you cover it up in your elevations with LW... the problem will still show in your sections..

[Seychellian]

Hi thanks for the reply, This is a solution that i had not thought of but tbh it also feels somewhat unsatisfactory.

If we have a floor slab that is 5000 x 5000 we have to adjust it to 4990 x 4990.

This will effect scheduling and dimensioning and means that you can't align or constrain the wall to the floor any more.

It also means that there is no global solution and every instance of this needs to be addressed individually. 

[Seychellian]

Hi, I just played with this. I didn't realise the difference between linework and model lines. It seems that linework knows what it is covering and thereby moves with the element which is pretty handy and mitigates one issue i was having. One thing though, how can you restore the line again once you have made it invisible?

[barthbradley]

I do not understand why those lines are visible.  We hide them via Join Geometry.  Are all the surfaces aligned?  

...if they are all joined via Join Geometry and the lines are still visible, that indicates to me that the surface aren't align properly. Could be fraction of a fraction of an inch off. Try aligning surfaces in 3D view. Betcha those lines disappear.  

[barthbradley]

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@Seychellian wrote:

 how can you restore the line again once you have made it invisible?

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Change the line to BYCATEGORY

[constantin.stroescu]

have a look at these details:

As you can see , in real life floor structure stops at the exterior face of the Wall Core. So the Wall insulation and rendering are placed in the exterior of the Wall Core...As a result in an architectural model the floor border will never be seen. If you do not cover the edge of the floor slab with insulation you will have there a thermal bridge , and this is not allowed (in real life).

• I'd use  LW only as a last solution...in a draft modelling

[Seychellian]

I live in the tropics. A typical wall/floor intersection for us looks like this.....

But I am generally reluctant to model the plaster layer because of experiences i have had where it become to difficult to manage when there are variations to the norm (i.e wrapping it around upstands or openings). So my workflow is just to model the primary wall structure  and add the finishes as details components. 

[constantin.stroescu]

So, as in a real life ...if you are not rendering (with plaster ) the exterior of the building ,then you will see both the brickwork and the edge of the concrete slab. The same is in your model.

This exposed edge acts as a thermal bridge . So you'll need to place an insulation layer to stop this behaviour.

If you'll use a layered wall (with core , insulation and finish render) then you will be able to stop the edge of the floor slab core to the outer face of the wall core), as in real life.

The Model has to be a virtual "replica" of the real building - that's BIM philosophy.

If you want to create a draft model for presentation purposes only ,then you can either create a floor with an offset from the wall exterior or  create a simplified wall with only two layers (core and thermal) and stop the floor edge at the core exterior face.

If you will rely  only on LW you will have a lot of work to do (LW is a View dependent tool) for each of your views that will be print.