Thanks for the help! But I do have one problem though. Below you will see an email that I got from one of the Triton reps.
"Thank you for your inquiry and also owning a Triton trailer. The plywood thickness was and still is 5/8”. In the event you are about to venture to your local Home Depot and purchase replacement lumber I want to advise you of a couple things. (1) You may have a hard time finding 5/8” plywood as it is not very common. (2) Make sure it has a “CCA” grade or less treatment (industrial). Most plywood found at your local supply sources is of a residential grade AC2 (Q) treatment that has a high volume of copper azal, it’s a type of pesticide. This will eat up your aluminum and weaken any welds and point of structural rigidity that it makes contact with weakening the trailer frame.
(3) Most local supply sources also only carry sheet of plywood from Yellow Pine stock. Yellow pine is very soft, the edges will curl and the boards will warp in between the cross members in due time. The recommended wood is Douglas Fur, it will stay flatter, longer."
The part that concerns me is "pesticides" used and what it could do to the aluminum trailer. Are you guys using "CCA" grade or have you not payed attention to it? Just curious. Thanks again for the help. Much appreciated.