Post To Concrete Pier Connection

Models are available for attaching to existing hardened concrete wet concrete as well as wood.

Post to concrete pier connection.

In this connection the bottom of the post has a 3 4 stub tenon that is routed into a plywood sub floor. The top of the post base straddles the wood support post and provides nail holes which should be filled to add strength to the connection. A galvanized steel plate or pvc spacer is used to separate the concrete and the wood. The arrows point at the hardware and bolts connecting the post to the concrete lock.

The drawing at the bottom requires a new steel reinforced concrete foundation. Figure 1 12 shows the bending moment versus rotation relationship for perma. The image to the right from a different engineer shows the exact same thing. To concrete connection do not behave like the wood post or the concrete pier they connect.

Post bases have an elevated bottom compartment with an opening that is designed to lock into a concrete anchor which is embedded in the top of the concrete pier. The blue box shows the post to block connection. Post base timber pier rod plate. I then use through bolts that pass through the beam and this post extension to complete the connection.

The remainder of the 6x6 post laps over the inner or outer vertical face of the beam. Log hog screws are used to hold the post to the solid blocking below. I never use lag bolts. I prefer this method because it creates solid bearing of the deck all the way down to the concrete pier.