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Thread: How thick is your floor?
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06-19-2021, 10:49 AM #1Guest
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How thick is your floor?
Just curious... I have some 3/4 laying around, but was contemplating going lighter. Then I looked at plywood prices.... jessssuusssssss.
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06-19-2021, 11:25 AM #2
Use the 3/4, pretty sure that is what is in my checkmate.
2023 Progression 22 w/ 2015 Mercury 300XS. 2018 Kawasaki Ultra LX. 1969 Hustler Wildcat. 1985 Hydrostream Vegas XT. Gone but not forgotten: 1991 POS GW Invader. 1976 Donzi Hornet II. 1994 Formula 232 LS. 2001 Regal 2660. 1990 Formula 206 LS. 1992 Checkmate Pulse 186 w/ 2003 Mercury 200 EFI. Random assortment of jet skis.
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06-19-2021, 12:25 PM #3The Historic Photo Master
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...depends on how its supported underneath but 1/2'' non non-wood core with 1708 biax top & bottom is more than enough in smaller boats. pyhi access holes or other access to reach underneath & 1708 bond it to the longitudinal stringers & transverse stringers where possible...
Last edited by FUJIMO; 06-19-2021 at 12:30 PM.
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MattGreen liked this post
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06-19-2021, 12:40 PM #4
No floor
1986 Tahiti Warrior rude 4.0 v8
1976 Skeeter Odyssey rude 235 sold
92 18' Mirage Jaguar xr4 sold
HydroStream Vector 200 efi
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06-19-2021, 05:11 PM #55000 RPM
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Didn't you claim to have the biggest @$!# on this whole site in another thread. Surely with a tool that size flopping around you'll need to skip wood and go straight to steel floors.
ANTI40It's just an idea.
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06-19-2021, 05:22 PM #6
Neither my 84 or 85 SST ever had a floor, real lite weight boats, because of those big tunnels, my drivers seat has always been in the center low
I ordered my race boats with the rear seat from the inboard version, here's a old picture...
You can see the big 4 inch fill tube/cap
Last edited by CUDA; 06-19-2021 at 05:25 PM.
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06-20-2021, 04:24 AM #7Guest
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I'm definitely going to run a floor or I someone is going to snap an ankle or lose teeth, lol.
I ran 1/2 across my tunnels and threw a 2x6 with some shims under it to simulate a stringer, but it still felt realllllll flexy. I know glass would stiffen it up some but I'd had to get done and have it not be stiff enough (heh). Might go with 3/4...
other thing to consider is the seats need to screw into the tops of the tunnels; so thickness is required for thread engagement. I guess I could predrill holes and use T nuts from the bottom, then put a sacrificial bolt in them when I'm glassing htem in, remove the bolt and have a nice threaded section to bolt the seats into.
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06-20-2021, 06:21 AM #8
One layer 1708 is = to 1/2 plywood in strength.
The span is pretty narrow.Last edited by CUDA; 06-20-2021 at 06:25 AM.
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06-20-2021, 10:01 AM #95000 RPM
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3/8 plywood, one layer of 1708 with extra strength resin.
1971 Sidewinder 14 SS w Johnson 90 v-4
1959 Texas Maid Falcon w Mercury Mark 35A
1981 Sylvan Sportster w Johnson 85 v-4
2006 Harris pontoon with a Yamaha 90
1969 Sunfish sailboat
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06-20-2021, 11:35 AM #10Guest
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if I went to 1/2.... then if my googling is correct, that is a weight savings of 30+ lbs. Hrm.
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06-20-2021, 12:20 PM #11
I used 1/2" NidaCore... glass on both sides. Can't find my notes right now but it was less than half the weight of 1/2" plywood when it was done.
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06-20-2021, 03:48 PM #122023 Progression 22 w/ 2015 Mercury 300XS. 2018 Kawasaki Ultra LX. 1969 Hustler Wildcat. 1985 Hydrostream Vegas XT. Gone but not forgotten: 1991 POS GW Invader. 1976 Donzi Hornet II. 1994 Formula 232 LS. 2001 Regal 2660. 1990 Formula 206 LS. 1992 Checkmate Pulse 186 w/ 2003 Mercury 200 EFI. Random assortment of jet skis.
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06-20-2021, 05:37 PM #13Guest
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06-20-2021, 06:27 PM #14
Nida Core is honeycomb lightweight plastic sheets, you can buy many thickness's plain or pre made
I know someone that used it in his transom with carbon fiber and mat between layers of Nida Core. light and strong and cheap
Many people seam to think you need a strong board to make a strong something, like most of the strength comes from the substrate,
when in fact the strength is from the covering said piece with glass/ carbon...
many stringer systems are just foam.
Todd D got run over last race in super stock offshore It's a 29 tunnel, he cut a 8 ft section out and it was feather light, he uses a special $$$ type of carbon with $ epoxy, crazy light and strong, until another 30 ft boat runs over you at 100MPH
most of your strength comes from what your wrapping the foam, honeycomb whatever with.
Home made https://youtu.be/kdImDPTMHb8We have invented the world; WE see
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06-20-2021, 06:30 PM #15We have invented the world; WE see
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