Options for Fastening Deck Posts to Footings
These hardware and fastener options are as much about lateral loads and uplift as they are about solid bearing surfaces.
Post bases help prevent the bottom of the wood support posts from being knocked off the footing sideways (lateral resistance) and being lifted up during high winds (uplift resistance). Plus the ones in the video elevate the bottom of the post up 1 in. off the concrete. Not only does the 1 in. standoff leave space for the top of the anchor bolt and nut, it also reduces the chance of water wicking up into the end grain of the post. Water migrating through the concrete footing or puddling water from rain.
Match your footing placement to your post base hardware
There are minimum edge distances required for the anchor bolts (J bolt, wedge anchor, concrete screw or adhesive anchor) to be spaced away from the edge of the concrete pier. And there are minimum edge distances required from the edge of the post base to the edge of the pier. Check with the manufacturer’s installation information before casting the footing and pier. Some of the 6×6 post bases will require a 13 in. or larger diameter pier to meet edge distance requirements.
Follow the post base instructions for the fastener requirements to attach the hardware to the post. Nail or screw diameter and length may be critical in order achieve the uplift capacity.