False floor and bulkhead question.
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False floor and bulkhead question.

  1. #1
    Senior Member NO BUTT NO PUTT's Avatar
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    Default False floor and bulkhead question.

    My buddy has a 18ft Bahner with a 468 and a Berk pump. Hes having the seats redone. He wants me to help him put in a false floor. Which is no biggy. But when I was looking at the new project I notice that there is no forward bulkhead or gunnel supports under the side of the boat. The bow is not ridged at all. You can actually see the bow flex if you push down on one side or the other with it on the trailer. Should this boat have a bulk head and side supports in it? It has full length stringers. But no support anywhere else.

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    Renegade jet tunneljet's Avatar
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    I would definately add a bulkhead, and some vertical support that runs inline with the stringers.

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    Senior Member NO BUTT NO PUTT's Avatar
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    Quote Originally Posted by tunneljet View Post
    and some vertical support that runs inline with the stringers.

    Where at? I dont have any in my Crusader. I have a bulkhead, and 1 support on each side next to the driver and passanger seat.

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    Renegade jet tunneljet's Avatar
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    Something like this would be good.
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    Last edited by tunneljet; 03-01-2009 at 09:04 AM. Reason: add picture.

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    Boat Nut sleekcrafter's Avatar
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    If this is a vee hull, most smaller boats only have a center keel support, the outer edge usually goes into a strake or just blends into the hull. I will give the hull lots of extra support, and eliminates twisting of the hull. Boats that have the floor boards rotted or torn away from the hull, will have the corners of the dash, cracked out. Some of the full stringer boats, have the floor dropped below the top of the stringers. Some boats have gunnel supports, some don't. Most gunnel supports are near the front of the saddle tanks, my guess is to prevent cracking around the filler neck.

    If your considering adding a bulkhead, make sure you leave an inch on the sides, and top for tabbing, if you butt it up tight it will crack the hull, by causing stress points.

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    Senior Member NO BUTT NO PUTT's Avatar
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    Quote Originally Posted by sleekcrafter View Post
    If this is a vee hull, most smaller boats only have a center keel support, the outer edge usually goes into a strake or just blends into the hull. I will give the hull lots of extra support, and eliminates twisting of the hull. Boats that have the floor boards rotted or torn away from the hull, will have the corners of the dash, cracked out. Some of the full stringer boats, have the floor dropped below the top of the stringers. Some boats have gunnel supports, some don't. Most gunnel supports are near the front of the saddle tanks, my guess is to prevent cracking around the filler neck.

    If your considering adding a bulkhead, make sure you leave an inch on the sides, and top for tabbing, if you butt it up tight it will crack the hull, by causing stress points.

    So I should leave an inch all the way around or just on the top and side of the bulkhead? Should we not put a bulkhead in?
    Will the false floor that im going to add be enough to add the strength it needs?
    Its a vee bottom boat with no false floor. I was going to glass in the floor and bulkhead. Should I not glass in the bulkhead completely?
    I was going to install the new floor at the bottom of the stringers in the center of the boat.
    Last edited by NO BUTT NO PUTT; 03-01-2009 at 12:04 PM.

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    An inch is a bit much, most of the boat builders use a pencil for a spacer. I usually make shims from a couple of paint stir sticks taped together. You do not want the plywood bulkhead tro touch the hull sides or deck, as mentioned above. This guy should be a really good friend, as it is a rotten job. I just finished putting a bulkhead in a 350 lb Rogers race boat, that never had one, it is a pain in the a**.

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    Quote Originally Posted by Riverbottom View Post
    An inch is a bit much, most of the boat builders use a pencil for a spacer. I usually make shims from a couple of paint stir sticks taped together. You do not want the plywood bulkhead tro touch the hull sides or deck, as mentioned above. This guy should be a really good friend, as it is a rotten job. I just finished putting a bulkhead in a 350 lb Rogers race boat, that never had one, it is a pain in the a**.
    Yeah, I have a pretty good feeling its not going to be fun at all. Im not glassing it in. Thats his job. Im just cutting the materials. Will the boat need a bulkhead if I glass the entire false floor in? If we do install a bulkhead. Do I glass all the way around it to the floor, sides, and deck? Or just tabs of glass like every 2-4 inches apart?

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    Renegade jet tunneljet's Avatar
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    You can completly glass the floor to the bulkhead, tab in the sides and deck. If you look closely at the pic I posted you can see the tabs.

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