Anchoring a pergola to a sloped slab
Does anyone have a suggestion for anchoring the four (vertical oriented) corner 6X6 posts for a pergola (roughly 14 ft L x 8 ft W x 9ft H) I am to help a homeowner build on his existing sloped concrete slab? It will not be tied into the house. Two concerns I have are the type of bracket I should use and the need, if any, to angle cut the post bottoms to match the slope of the concrete. It would be ideal to use something that little kids running about would not easily trip over.
I would do it one of two ways, both using the same simpson deck post fastener (the ones that sit on concrete piers with an expansion bolt that goes into the slab and nail to the bottom of the posts). If the angle is less than a quarter inch or so, I would shim up the one side of the hanger with stacked galvanized washers. If it is more than that, cut the bottom of the posts to match the angle before setting them. Either way, trim out the bottom of the 6x6 with 1x8 cedar to hide the bracket.
Thanks for the recommendations! I'll check out those brackets...didn't know they made them for 6x6 posts.
I'm also building a pergola with 6x6 posts. I was trying to find a manufacturer of the brackets that are the strap type that run up two sides of the posts. Anybody use these or know of a manufacturer? Mine is being built over a bluestone patio, and I am constructing concrete footings off the patio at the corners. I don't know if this would work in your case.
Home Depot has various brackets that look like they'd do the trick for 6x6 posts. One is a heavier duty Simpson (?) bracket with a raised bottom to keep the bottom of the post off the ground.