Hull thickness
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Hull thickness

  1. #1
    Senior Member Delemorte's Avatar
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    Default Hull thickness

    Im installing new carpet and building a rack for my battery box and control module. I have it elivated to keep it as dry as possible but this entails screwing the sucker to the bottom of the boat. I would glass it in but how i want to lay carpet makes that tricky.. I still might depending on the responces i get.

    How thick is a boat hull? What im getting at is how much of that screw can go into the floor before its gets dangerous or leaky?

    79 Sleekcraft sportster BTW.
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    Senior Member OUTLAW HALLETT's Avatar
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    you may be told something else , but i would say it dosent matter , youshould never put a screw into the bottom of the floor , if nothing else i would think it would cause a weak spot , a place for a crack to start , just my opinion good luck
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    Senior Member Delemorte's Avatar
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    Quote Originally Posted by OUTLAW HALLETT View Post
    you may be told something else , but i would say it dosent matter , youshould never put a screw into the bottom of the floor , if nothing else i would think it would cause a weak spot , a place for a crack to start , just my opinion good luck

    Didnt think about created a weak spot.. Hmm...
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    the ensueing fire would likely be extinguished by the sinking however
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    Senior Member LuckyDaze's Avatar
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    Tie into a stringer if you can. Putting stuff through the bottom of the boat is doable but I wouldn't screw anything into it. For a battery box I would tie into the stringer or build a build up you can tie into. Then fill the hole with silicone and stick the screw in so it wont absorb water later
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    Senior Member Delemorte's Avatar
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    i think thats gonna be the plan..


    Thanks...
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    the ensueing fire would likely be extinguished by the sinking however
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    I have no clue about your specific boat. But I've cut a few up and usually the bottoms are about 1/4" - 1/2" thick. I don't see how you could get anything to screw into the fiberglass without going through which may not be too bad of a thing as flat bottom v-drives can have fuel tanks bolted up through the floor.
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    Quote Originally Posted by OUTLAW HALLETT View Post
    you may be told something else , but i would say it dosent matter , youshould never put a screw into the bottom of the floor , if nothing else i would think it would cause a weak spot , a place for a crack to start , just my opinion good luck
    dont do it
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    Senior Member Delemorte's Avatar
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    Quote Originally Posted by Richcraft View Post
    dont do it

    Im not now.. I will figure out something..


    I think ill just glass in a couple of risers that match the hight of the stringer. then lay the carpet and screw the battery plate to those risers. that keeps the board high enough to keep everything dry and the only thing touching the bottom will be glass.. Some extra work but not worth putting a friggin hole in my boat.. We will see how creative i can be :-)
    Last edited by Delemorte; 01-22-2009 at 03:23 PM.
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however
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    Senior Member Xerophobic's Avatar
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    Weld it to the bottom

    If you ain't hittin bottom...you ain't jetboatin!
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    Senior Member Delemorte's Avatar
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    Quote Originally Posted by Xerophobic View Post
    Weld it to the bottom


    If i had an aluminum boat i surely would... As it is im not sure a fiberglass and wood boat would hold up to the tig welder...
    Quote Originally Posted by jetboatperformance View Post
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    Quote Originally Posted by Delemorte View Post
    Im not now.. I will figure out something..


    I think ill just glass in a couple of risers that match the hight of the stringer. then lay the carpet and screw the battery plate to those risers. that keeps the board high enough to keep everything dry and the only thing touching the bottom will be glass.. Some extra work but not worth putting a friggin hole in my boat.. We will see how creative i can be :-)



    This basically what is in my cat. There is a raised area between two stringers in the engine compartment, which house the batterys and such. This gives a good mounting point, and keeps everything dry.


    Darrell.
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    28ft Sportcat
    With Twins
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    Quote Originally Posted by Xerophobic View Post
    Weld it to the bottom

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    Distinguished Member David 519's Avatar
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    All flatbottoms have literally dozens of hole into or through the bottom. Cav plates, shaft log, water pickup(s)... etc. Done properly, it's not a problem. That said, our battery is attached to the stringer about an inch above the floor. Check out battery boxes @ Rex Marine for different ideas on mounting.. Good luck
    Quote Originally Posted by gn7 View Post
    ....... David 519 is 100% correct........

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  16. #14
    Senior Member Delemorte's Avatar
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    Well this is what i came up with.. Just glassed it into the bottom and cut some 3/4 ply to make my shelf . Ill glass that peice of ply tomorrow as well as paint that piece and once carpet is layed down it will be all covered up. First attempt at glassing anything in a long time so i think i got a couple of air bubles near the surface.. Ill sand them out and throw one more mat down.


    I also got the bildge painted while i was playing around and fabricated a new tank selecter bracket..








    My last one was being held up by zip ties...
    Quote Originally Posted by jetboatperformance View Post
    the ensueing fire would likely be extinguished by the sinking however
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