flat floor? for 1648 mv

My ribs are 12" apart. Will 1/2" plywood be enough support?

:WELCOME:

Thanks for joining. That should be ok. Are you just going to lay it down on top of the ribs? If so you can do a test.

Welcome to Tin Boats. I agree, you should be fine just laying it across the ribs. You might want to think about notching the plywood so it does not slide.



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Thanks for the welcome!

I put some aluminum 2"x2" L shaped bracing in because the ribs are not flat due to the v. I supported them with wood pieces (sealed) cut to match the conture. The plywood will be attached to the aluminum braces that are flat and about a foot apart. I plan to notch the floor to fit in between the ribs. the problem I am finding is that my floor is wider that 48" so a 4x8 piece won't work unless I use multiple pieces. Is marine ply the way to go? What is the strongest type of plywood suitable for outdoor use?

You don't need marine grade for a floor.

By the way. We need pics!

Look through the posts and see how others have leveled their ribs with aluminum angle prior to laying their floor. If your floor is a little springy between the ribs, you can glue-screw some strips cut and placed long ways (bow to stern) between the ribs to stiffen up the 1/2 inch ply. Three to four 2" strips placed this way will really give the ply some backbone. The strips will go on the bottom out of sight. Oh, I guess I should read before responding. Just 12" between ribs. No prob.