Porch slab to overhang frost wall

[Jambruins]

Is there a way to get a porch slab to overhang the frost wall by a couple inches?

[Chrisb222]

17 minutes ago, Jambruins said:

Is there a way to get a porch slab to overhang the frost wall by a couple inches?

 

Several methods. One of the easiest I've found is add a concrete layer to each side of whatever wall you used to define the porch:

 

 

 

[Jambruins]

That worked but now it is creating a small roof where there shouldn't be one. Any ideas?

 

Thanks for the help. 

[Chrisb222]

14 hours ago, Jambruins said:

Any ideas?

 

It doesn't do that for me:

 

 

Post the plan and I'll take a look to try and see what's going on. I suspect the porch room is extending out past the house wall which isn't necessary for this technique to work.

 

My biggest complaint with the technique is visible lines where the overhang meets the slab in vector views, which you can see in my pic. Another problem is the automatic ceiling will extend through the attic wall to the outermost edge of the overhang, which you can also see. 

 

There are other methods. One popular method is to delete the floor structure of the porch and manually draw in a slab, which eliminates the extra lines in vector views. Another is to use a 3D solid around the porch with concrete material. You can also do that with a molding poly line, but both of those also show the extra lines. There's another method that's pretty complicated that works well, I've used it but to me it's not worth the extra effort involved.

[Jambruins]

here is the plan.

Thanks for the help. 

house.zip

[SNestor]

I downloaded your plan...I'm not seeing the problem. Your porch overhangs...and the roof looks correct.

 

 

[Doug_N]

One way to do this that gives the design lots of flexibility is to use a molding polyline and a slab edge profile.

This has a few advantages such as not affecting the roof, the ability to turn off an edge to exclude the profile on that edge (up against the exterior wall for example) and the ability to apply radiused edges.  In my example I include a drip cut into the concrete to prevent water from running back to the foundation wall.

 

The stairs in this example are not the CA generate stair, but an extruded polyline solid, that accounts for the slab edge profile.  That can be made to include a backward sloping riser as well.

 

 

Slab Edge.calibz

[Jambruins]

45 minutes ago, SNestor said:

I downloaded your plan...I'm not seeing the problem. Your porch overhangs...and the roof looks correct.

 

 

I manually edited the roofs. If you rebuild the roof you should see the issue.

[Chrisb222]

2 hours ago, Jambruins said:

here is the plan.

Thanks for the help. 

house.zip 3.69 MB · 4 downloads

 

It's something to do with the wall type there, which is specified as Deck/Fence, and the standard Railing/Fence wall type is not in your plan. If you change that to one of your interior railing styles, and change the layers to the same as your Deck/Fence type, the roof doesn't generate:

 

 

I noticed in your file, that extra line I talked about wasn't there and it's always there if I use the normal Railing/Fence wall type. That's what tipped me off, and you can see the lines in my screenshot.

 

I don't know what's different about those wall types causing the different behavior, but that's what's causing it.