What is a keyed footer?

A keyed footer is a term to describe a footer that has a U shaped top. The top can be formed in a way to make the U or the finisher may be able to shape the key by hand if the footing is small enough.

The purpose of a keyed footing is create a better bond between the concrete footing and the structure that it supports. Most commonly a keyed footing is used on walls that may have horizonal pressure such as a retaining wall. I hope the answer is helpful, if you have any other questions I check this forum regularly and will be happy to help.

Please  check all local codes before moving forward your project as I answer all questions with my knowledge as a builder in Florida and the practices may differ from your area.