Swim platform/ladder

Fact: The lower part of the brace on the swim platform is underwater anytime the boat is not on a plane. On my boat the brace was not through bolted because it was only about an inch and a half from the bottom. Have got to make some changes. For those of you who have a swim platform. How is your lower brace attached and how far is the bottom of the brace from the bottom of your boat?
NO pictures were taken.