Porch post/slab connection?
TLDR: Pouring a back patio that will be partially covered and I’m wondering the best way to support the post.
I’m adding a patio on the back of our house and I’m not sure the best way to add the posts that will support the roof. The posts will 5’ off the house and carry a 3ply 9 1/4” LVL and then part of the roof load that comes off the house then overhangs a foot.
My frost line is 32”. Can I get away with a thickened slab 12” or so with rebar grid at the bottom or do I need to do more of a sonotube? I’ve assumed sonotube to this point.
Simpson makes a post base you can elevate out of a sonotube or whatever foundation you have so I’ve thought about that then pushing concrete in those 2” that are elevated when we pour the slab. This would allow me to get the Amish framers in the quickest.
I’ve also thought, and probably prefer since it will be easier to make sure my post will be level and plumb, about doing a monolithic pour then bolting through the slab and into a pier. I could also use a longer anchor bolt, J hook or that squiggly Simpson thing, and let it extend enough to still be above the slab.
I could also do the anchor bolt if poured separately.
I’ve seen arguments for both separate pours and monolithic but I really just want what will be the strongest foundation in the end.