Boat structural rigidity question, please...

dsumari

Recruit
Joined
Jul 2, 2005
Messages
5
Hello everyone,<br /><br />I am putting my '95 20' I/O bowrider back together after having most of the stringers and floor replaced. <br /><br />Just had the floor and about 8" up all the sides sprayed with a tan color Line-X bedliner last week. I think it looks great and, yea, I am kinda going nuts to seal this new floor and eliminate or minimize penetrations, but thats for another discussion. <br /><br />I rebuilt the rear bench seat using marine ply and epoxy. I also rebuillt the sundeck but used 3/16" aluminum plate with some trussing welded on the cushion side for strength... Like alot of boats of this vintage the sundeck is supported across its front edge by the top of the rear seat back. I am using a piece of 2 1/2" aluminum angle(for the sundeck to lay on) to span the length of the back seat. This will be bolted or pinned to aluminum brackets I've made for each side of the boat attached to the inside of the "top cap" or as I call it "the deck". In other words, I am going to support the sundeck, take some of the weight off of the top of the seatback and generally tie everything together across the boat. <br /><br />Okay, finally here is my question. Is there much flexing on a boat such as this at the top of the boat? I was going to make a rigid connection between each side (bolted tight) thinking that might be a good thing. Don't wakeboard towers kinda do the same thing?... Or should I allow for some movement in order not to break or crack any glass?<br /><br />Thanks for your patience, if your still reading, I always give too much info. Danny
 

Realgun

Commander
Joined
Jul 31, 2003
Messages
2,484
Re: Boat structural rigidity question, please...

The nearer the rear of the boat the less flexing should happen. The transom was designed to be very strong and rigid. If you put this bench/deck in it might be best to have a wee bit of flex there. A rigid struture will break a semi ridgid will bend with the force rather than break.You really don't want to "break" the hull.
 
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