quick stringer questions??

Paulinct

Cadet
Joined
Aug 18, 2003
Messages
19
Ok I decided to cut out the old stringer. I did a search on the subject but still have a couple of questions:<br />1) I am not sure if the stringer runs all the way thru the cuddy. There is a board running port to starboard just before the cuddy. Can I stop the new work there if the wood is in good shape? Is a joint ok if it is glassed together?<br /><br />2) I plan to cut the old stringer completely out (down flush with the hull) Should I use 3M 5200 to glue the new in place then glass it in?<br /><br />3) I plan to use ABX 3/4" to make the stringer. I will cut to fit then resin coat it. ABX ok in this application? I read a thread or 2 about plywood grades but there didnt seem to be a conclusion :) . Just wondering if anyone has had any problems "after the fact"?<br /><br />4) Last one !! I bought evercoat resin but now I am wondering if I should return it for West System ?<br /><br />Thanks for your time guys!!<br /><br /> Boat Pics
 

braindead0

Petty Officer 2nd Class
Joined
Aug 26, 2003
Messages
169
Re: quick stringer questions??

4) You might want to consider Raka, it does a very good job soaking into bare wood...
 

CTD

Petty Officer 1st Class
Joined
Nov 13, 2002
Messages
234
Re: quick stringer questions??

FWIW my Chris Craft has an eggcrate type stringer system and the side to side boards are one piece and the fore and aft are pieced together, came from the factory that way. I think the 5200 is just silicone sealer so I wouldn't use it for bonding.
 

JasonJ

Rear Admiral
Joined
Aug 20, 2001
Messages
4,163
Re: quick stringer questions??

I used ACX for my entire rebuild. How long it will last, I couldn't tell you, but I sleep at night knowing that the original wood wasn't as good as the ACX was and it lasted 33 years. I did make sure every bit of that wood was well soaked with resin and glassed in, there is not a single bit of exposed dry wood in my boat, except my head when I forget a hat. <br /><br />The key is how you care for the boat after you do the repairs. Keep it covered, make sure all through-hull fittings and hardware are well sealed, and just do everything you can to prevent water from getting in. I find myself obsessively checking my bilge, and of course it is always bone dry despite the fact I keep it in the water.<br /><br />You can use pressure treated but it needs to be dry. Marine grade ply is a good bet too, but the regular ACX if treated properly should last as long as you need it to. You can marry the new wood to the old wood, it is done all the time, just make sure the old section you are marrying up to is sound, well sanded, and clean. Do not use 5200 to try to bong the stringer to the hull, it isn't necessary. Make sure the stringer fits as good as you can, and whip up a thickened batch of resin, the consistancy of peanut butter. There are fillers available. Use that under the stringer, it will fill any small voids and provide a minimal bond. The actual glassing the stringer in is the main bond you will get. Make sure you glass all the way to the top of the stringer, it is stronger that way and protects the wood from water better. My stringers were only glassed about 6 inches up, its no wonder the wood rotted away to mulch. Make sure you glass the entire exposed surface of the floor, using a good strip of roving to join it to the sides and transome, and a layer of mat or cloth for the rest. The roving should extend at least 6 inches up and out. You could glass the underside of the floor, but I feel that just soaking it liberally with resin is enough. Try to provide passive ventilation for the non-foamed portions of the bilge, air flow will cut down on condensation, which is what ends up rotting the floor from underneath.<br /><br />Resin is resin. Doesn't matter what name is on the can. What does matter is the type of resin. Polyester works fine, its what I used, its what the boat is originally built with, but it is not as tolerant to poorly prepped surfaces and it stinks so bad you need a respirator. Epoxy is a better way to go, it is stronger, a little more tolerant to poorly prepped surface, but you should still have it as sanded and clean as humanly possible. It has very little odor. It is quite spendy though, which is why I used Polyester resin. Hope this helps a little, good luck...
 

J-ranger

Cadet
Joined
Aug 27, 2003
Messages
6
Re: quick stringer questions??

Hi guys, I am new to the forums and I have alot of q's. I am doing a teardown on a 16' aluminum boat and I dont even know what a stringer is or this foam everybody is talking about. Could somebody help. Pictures would be great. Thanks.
 

JasonJ

Rear Admiral
Joined
Aug 20, 2001
Messages
4,163
Re: quick stringer questions??

Jranger, it is always a good idea to post new topics seperate from other posts, increases the odds you'll get answered. Your aluminum boat plays by a seperate set of rules than the 'glass boats. Any structure you have should be aluminum, so you won't have to replace it. The floor will probably be wood, and the transom should be wood as well. If any of that needs to be replaced, it just bolts in, so you won't have to endure the joys of 'glassing. <br /><br />The foam exists to displace enough water from the boat to keep it at the surface should it get swamped or get damaged in such a way that it takes on water at a high rate. Usually the foam is set up to either keep just the bow above the surface, or keep the entire boat level at the surface. You want to have it set up to keep it level. On 'glass boats the foam is under the floor between the stringers, but aluminum boats I am not sure where they put it. You will know when you tear into it, there should be foam in the boat somewhere.
 
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