Designs available in steel…. steel is an excellent boatbuilding material, proven in use worldwide. however, due to the relatively high weight compared to other. Boat plans catalog – 300 boats you can build! new – electrical design plans; boatbuilding supplies & epoxy; inboard hardware; books & dvds; raptor® fastenings. This category includes houseboats and pontoon boats from 16′ to 45′ that you can build. building your own is easier than you may think. about our plans & kits.