Size the post-base hardware for a deck or pergola in one step. Enter the number of posts and the base style to get the bases needed and the total anchor bolts or screws to order.
Post Bases Needed
— bases
One base per post.Usage Tip
Standoff bases keep end grain off concrete and extend post life. Order a few extra fasteners — many brackets ship without them.
THE MATH
Bases = Posts
Fasteners = Posts × F
Post count = Posts
Fasteners = Posts × F
Post count = Posts
F = fasteners per base: 4 for standoff bases, 2 for wet-set bases.
Posts = number of structural posts entered.
Posts = number of structural posts entered.
Standoff bases lift the post on a raised pedestal so end grain never sits on the slab — keep a 1 in. minimum gap so water drains and the post resists rot.
Wet-set bases are embedded in the wet pour and rely on the concrete to hold, so they take fewer fasteners; set and brace them plumb before the mix sets.
Match the connector and fastener size to the base model and local code, and use only hardware rated for exterior use or contact with treated lumber.
Wet-set bases are embedded in the wet pour and rely on the concrete to hold, so they take fewer fasteners; set and brace them plumb before the mix sets.
Match the connector and fastener size to the base model and local code, and use only hardware rated for exterior use or contact with treated lumber.