strick,
Here are the swim platform brackets:
As you can see, they weren't painted and are pretty heavily corroded. If I decide to re-use them, I'll need to sandblast and powder coat them. The length of the top flange is about 18 1/2". The transom flange is about 8" long. The flange width is 3 1/4". There were four brackets supporting the platform and it was very solid.
Dave