Best practice for doing porch slab extension?

[GeneDavis]

There is a long thread in Suggestions about extensions outboard of railings for porches, but we do workarounds now, and I was wondering how others approach this.

 

Here is a covered porch, with slab floor, attached to a house on monolithic slab.  I wanted the porch edge to go 6" beyond the post-to-beam railing line.  The railing is an OOB interior railing wall, specified the way I want it for the post and beam structure, and the extension is a molding.  Because I did not edit the railing wall makeup which comes OOB as a framed wall with sheetrock faces, I needed to paint the 1/2" of sheetrock at edge of slab, which I did at the same time I painted the molding the same concrete texture as the slab.

 

 

I know if this goes to con docs I'll be using CAD in the plan view and detail sections, and I'm OK with that.  My workaround here was quick and easy and gets the results in 3D for the client to see.

 

How would you do this? 

[Doug_N]

Hi Gene,

Did you try a horizontal offset on the railing?

[mtldesigns]

5 hours ago, GeneDavis said:

and I was wondering how others approach this

A simple slab and post like you show (sitting on the grade), I model the slab at the shape and size I need (using the slab function and not the railing).  I then do my roof planes. over this slab.  I model my post (with footers underneath) and beams strategically with the roof.  I don't call out porches on my room schedule (typically), but do note it on the floor plan.  Doing it this way, I can have as much space between the edges and post as I want.

 

If I am having same porch, but need a foundation under the slab, I will model this with railing walls (with ceilings/roof turned on), but specify my railings as open, no newels or post and no rails.  Then I do as I did before, and model the post and beams manually.  It takes only a few minutes, the 3D looks right and my porch details on the docs detail this connection.