JEM Watercraft

Do you have a set of plans that are avaliable for building large scale pontoon boats ?
If so I would like to build a 24 foot pontoon boat

No, nothing that big. Something that size starts getting into a "power boat" category. And that's not something I specialize in.

However, you might want to contact Morten Olesen of www.boatsplans.dk and get his thoughts.