1970 Glastron Deck (pics)

[cordell]

Hello some of you may have read the "Bandaid" thread this started with, this is the project of my deck replacement I started today. I am doing this for the first time so I am looking for Yes thats right AND what the heck you cant do that! lol

Here is my rotted deck I thought the stringers were going to be OK but nothing goes the way you plan when doing these things!

Basically I had a rotted deck when I bought the boat. The guy had it in the yard under a tree for a couple years. I was going to wait until the off season but the seat fell through the deck and shoved a screw hole through the hull.

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So I decided to do the whole repair, started today with this mess of a deck!

I then tore up a bit and glassed over the little screw hole.

My rotted stringer that were NOT supposed to be rotted!

I am scabbing a new piece of treated wood onto the old stringer. They are solid enough in places to do this. I will also reinforce them somehow just not sure how yet.

I need some serious advice here I want to know if I can get around glassing over the finished deck. I have primed both sides of the 1/2 inch plywood I am using for the deck. Would that be enough for a few years? I am also putting down carpet. The current deck I removed I took the glass out all the way to the edge of the hull. I dont know if that was the best thing to do as I was reading in another thread that they left this lip of glass, they called it hull deck flange. Let me know what you all think I know some of you have done this countless times and I could use alot of guidance!

thanks
cordell

 

[cordell]

Re: 1970 Glastron Deck (pics)

I have gotten NO replies to my project, I started to read other threads on this same subject and found the correct way and figured I made the choice to fix this so I am going to do it right! The current stringer can I cut the top of the glass and remove the old rotted wood and set the new stringer in using peanut butter? And if so glassing over the new stringers how far do I need to run the glass over the existing glass, 3 or 4 inches onto the hull be enough?

cordell

 

[erikgreen]

Re: 1970 Glastron Deck (pics)

It'll be stronger if you remove the old glass too, however if you don't then I'd do two layers minimum of glass, one overlapping 2-3 inches and the other 2 inches beyond that.

But I would recommend removing the old glass and redoing it for strength, if you want to do it "right"....

Erik

 

[cordell]

Re: 1970 Glastron Deck (pics)

Thats not what I wanted to hear! lol I knew that was going to be the correct way though...My stringers are only really rotted in the center of the boat. I was also considering sistering a full length new piece of laminated ply to the old stringers and glassing over the whole thing.

thoughts?

cordell

 

[redfury]

Re: 1970 Glastron Deck (pics)

Well, there's different ways to look at it. You can sister wood to it and glass it in, it'll be strong enough, but it will add weight. You can re-glass new stringers in, and you can cut the caps off the old stringers, replace the wood and recap with a couple of layers of glass.

Really, it's up to you. How far into the project do you want to get with it, and remember, temporary fixes become permanent solutions ( meaning, you'll never get "around to it to fix it right later" )

 

[cordell]

Re: 1970 Glastron Deck (pics)

Well after a few hours in the hull tinkering around with some 1 by 6 fir I came up with a single stringer down the middle. I used 2 of the 1 by 6 and 2 layers of 1/2 in ply in between the lumber. I will also be adding some stringers of the sides of the main one ( not sure what to call them ) but I figure about every 3 feet. Boat is 15 foot with 12 foot of exposed hull. I am also thinking of buying that expanding foam to fill under the deck as that might give some support also. If the side stringers will be enough I would like to use the old foam rather than spend the $$$. The old foam is not wet at all. The rot is just neglect from previous owner. I am praying that the one stringer idea is going to pan out, as I have already installed it. lol Just waiting to add the side ones and start glassing tomorrow.

cordell

 

[oops!]

Re: 1970 Glastron Deck (pics)

cord......

the best bet...is to copy what was there...and improve upon it

if there was three strings....use three strings.

ply wood is the best.....ext grade

as far as using the old foam.........i know cost is a factor... but its better to dumpster dive for foam than use the old stuff....

if you do buy the foam...the 2 part is the cheapest and will give the hull more rigidity......

the deck must be glassed in....its structural

i would read the compleated projects forum......everything....read erik greens "unintentional stringer job"

http://forums.iboats.com/showthread.php?t=236286&highlight=unintentional+stringer+job

redfurys thread...(...mike...where is it?)

this one....
http://70silverline.250free.com/Skankybeast.html

and the hull ext....(all of it)
http://forums.iboats.com/showthread.php?t=234392


one of the best things you can do....is study diffrerent ways to do it....read everything....there is some really valuable info on thoes ones....it will save you tons of man hours.....and if you follow instructions about where to wash your clothes....it will get you saved from getting you kicked outta the house

good luck....were here for ya

cheers
oops

 

[cordell]

Re: 1970 Glastron Deck (pics)

My thoughts originally were to do so, mimic what was already there. However it did not work out so good for me. The hull seems to need wider stringers in the middle, common sense I know. What I did not know was the stringer is not a straight line across the top. After cutting scrap wood I found the profile of the front, took some measurements and cut stringers. I then set in place, the original place. Taking my level, I know level has no place on a boat but I was using it for a straight edge, taking my level I set it across the hull to see if the stringers lined up with the edges of the hull. In the front of the boat all is well and the back all is well. The center is were the issue was. I needed the stringer to raise up about three inches in the center only. Having bought dimensional lumber this was not going to happen. I then came up with the single stringer idea. The middle stringer is completely solid and very sound. I took my dimensional lumber and attached to both sides and used plywood in the center to fill the voids. by using the plywood it allowed me to bring the stringer up the the height I needed in the center of the hull while gradually rising the plywood to meet the desired height needed in the front. To sort of substitute for the double stringer modified to one I plan on using the 2 part 3 pound foam. The pic shows where I will add this in yellow. I hate to say it but I wish my transom was shot too, I think pulling the cap and starting from scratch would make the labor of this job much easier. The pressure of a July 4th finish is rising and so is the amount of work in this project! This is my first boat besides my starcraft aluminum 12 footer, 9.5 horse rude. So I cant tell if the love I have is for this trihull OR the thrill of being on the water! I wish I knew as it would help in my decision making process. lol I know without the people here at iboats I would be at total lose. I read threads for about 6 hours last night and this morning. You guys are amazing and full of knowledge that has brought me to understand the structural points of a hull. Even though I know I still look for that corner to cut. I put some pics to show the modified stringer. The distance from the modified to the old is about 6 inches, reason I believe it will be fine as long as I add the urethane foam, and the cross stringers (not pictured yet). The cross stringers I plan to do every 2 or 3 foot. I think 2 is better as the plywood is 48 inches. Anyway thanks for the input everyone I will add some of my glass work pics tonight.

cordell

The yellow is 3 pound foam from http://www.uscomposites.com/foam.html

 

[cordell]

Re: 1970 Glastron Deck (pics)

OK according to my calculations last week I should be done with this project today, NOT! I did get a lot done today though I cut and profiled my little supports that come off the stringer. I am setting these every 2 foot from where I started deck replacement. Once this mess of my stringer job gets glassed in I have no worries in my mind about strength. I am however starting to wonder about foam. With these side supports will I need to urethane 2 part foam OR could I use regular flotation foam? The main reason for the urethane foam was for more support but after looking at my stringer mess I am thinking it might be good enough. Any thoughts on this will be greatly appreciated! I must go back to work for a few days 4 to be exact, working 12 hours puts the boat on stand by. I have 7 more days of work to put in on the boat before the 4th of July where my wife and kids plan on being on the water in the completed boat....HELP!!! lol I think I can I think I can...

cordell

 

[oops!]

Re: 1970 Glastron Deck (pics)

gonna have to work like a mad fool to make the foruth.....

or just slap a deck on temp like and go for the day......

looks good so far....you need to glass the strings bud.....that can take a while

 

[redfury]

Re: 1970 Glastron Deck (pics)

The mods pulled that thread outta there because my project isn't complete.

The modified stringer design you're using there is interesting. It will be interesting to see/hear how the hull reacts to it in the water.

I think there will be more work glassing that in than just redoing 3 stringers though.

 

[cordell]

Re: 1970 Glastron Deck (pics)

I know it will be a crazy deadline! I get off for 3 days at a time though so that will be my doable factor. I know my mod stringer looks a bit wild but after reading countless thread I came up with a bit of everything. I am also adding the 2 part urethane foam for added support and stability. I believe with this added into what I have the hull will preform like new if not better than. I am leaving about a foot down the center open for water drainage. I don't plan for any but I know a boat is a hole in the water! lol The true reason I am worried about running the 3 stringers is I don't want to get to the transom and find another project. I have the beginning stages of rot in there and have since patched the holes and drilled a few more to check for fresh wood. I plan to use this hull for say 2 years (I got it for only $100) and upgrade to something bigger. I would love a cabin style boat, something the family could stay on all night while I fish for sturgeon.

cordell