Replacing floor in 14 Ft. fishing boat. Planned on using 1/2 plywood in 4 ft sections(4'x6') for 6' wide boat. After measuring, 6' long sections won't slide in due to top rail.Can I cut and install 3'x8' sections? seems plywood isn't as strong when used long ways. Guess they install the floor before installing the top deck. What do I do about a seam running down the center of the boat then to get it strong? Bottom stringers are on 2' centers