Hello
I’m building a wraparound veranda/porch. I’ve got the deck built, with joists parallel to the house and t&g flooring. There are concrete piers supporting the beams which run perpendicular to the house. It’s only 8 inches above grade and there will be no railing.
What I’m stumped on is the best way to attach the posts to the deck. There will be one directly above each pier. I’m using solid 6×6 white pine posts, mortise-and-tenon joined to the beam and with routed corners leaving the top and bottom square. So no plinth to hide fasteners or hardware.
Any ideas or experience would be much appreciated!
Replies
are these the posts that hold the roof?
I often use GRK structural screws as "toescrews" at the post base, driving them in diagonally like toenails. I have to presume the type roof and attachment to house provides the shear strength, but otherwise you may need corbel/kickers at top to keep things upright.
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Your location and uplift requirements would determine the procedures you have to use to hold the structure to the ground.
We use a lot of Simpson ABU's with the bolt epoxied in to the concrete and nails into the posts, however, that's exposed and is usually covered during trim.
In your case I would look at the Simpson Architectural Products Group under standoff bases and select the CPS6. You would need access below the deck over the piers to use a nut and washer to hold the post down to the framing because the base is screwed to the post first and then the rod is usually epoxied into concrete. Note: you would be changing the rod to allthread.
You could also try newel post anchors which would be screwed into solid framing first and the bolted to the post via a clearance hole drilled in the end of the post and then apply the washer and nut thru a pluggable hole drilled in the side of the post.