21' Bowrider Re-design

Discussion in 'Boat Design' started by CaramoanReef, Jul 6, 2016.

  1. CaramoanReef
    Joined: Jul 2016
    Posts: 12
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Caramoan, Camarines Sur, Philippines

    CaramoanReef Junior Member

    Stringers Glued to Hull

    Here are a couple of photos of the stringers glued in to the hull. I used marine epoxy that I picked up here locally (Cord is the brand). I used Poly Tap to make the fillets on either side of each stringer.

    The other photo is of the "combo mat" I purchased here. According to the store, it is 1.5 ounce mat attached to 16 ounce WR. I am planning to put 3 layers of this over the entire stringer and overlap it 5 inches, then 3, then 2. The center stringer is 14 inches at the tallest point, the next 2 are 8 inches high, and the last ones are 3 inches high.

    Any comments or opinions on this layup?

    Thanks!
     

    Attached Files:

  2. CaramoanReef
    Joined: Jul 2016
    Posts: 12
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Caramoan, Camarines Sur, Philippines

    CaramoanReef Junior Member

    I was able to find some biaxial 90 degree fiberglass at the store in Manila. I don't know the weight or thickness because they converted the standard way of measuring this to grams. They are calling this 600g. Any idea on the weight of this cloth in ounces?
    I am planning to wrap the stringers with 3 layers of this with 1 ounce mat in between each layer starting with 1 layer on the stringer = 3 layers of 600g biax + 3 layers of 1 ounce mat. Our calculations showed that this would give me a thickness of .24". Is this sufficient strength for 14" high x 1" wide foam cored stringers?

    Question: how should I connect an encapsulated plywood deck to the stringers? I don't want to drill holes into the stringers, since that seems an invitation for water to go in and weakens the stringer. Any techniques on how to attach the deck?

    Thanks,

    Bryan
     

  3. mickyryan
    Joined: Apr 2016
    Posts: 23
    Likes: 1, Points: 3, Legacy Rep: 14
    Location: florida

    mickyryan Junior Member

    you can use pl premium however I would use screws and seal them once that's done with the pl premium your deck is bullet proof remember the reason screws invite moisture is because they weren't sealed they just screwed it then glued carpet to it in most cases .
    the way I sealed my screws was to take and drill a hole put the sealer in then screw down then after all that I went and ran a layer of 1708 across my deck because idont have a single friend under two fitty and 1/4 ply with 4 oz matt is just going to crack and let water in I went with 3/4 ply on my floor and don't regret it not a creak anywhere :)
     
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