Front Deck Build

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bassboy1
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Post by bassboy1 »

mtnbasser wrote:you gonna use 3/4 in plywood for the deck? i ended up using 3/4" treated and man its heavy. if yo are garage keeping it, you may be able to get away with non-treated cut down on the weight alot
Don't use pressure treated anyway. Certain kinds react with aluminum, and cause the aluminum to corrode real quickly. Use the furniture grade (no knots on the outside plys) and coat it with some sort of water sealer, or oil based paint.

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Post by mtnbasser »

bassboy, i want aware of treated lumber corroding aluminium. I have had treated on my rig for 5 or 6 years with no vissible corrosion.[/quote]

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Post by bassboy1 »

mtnbasser wrote:bassboy, i want aware of treated lumber corroding aluminium. I have had treated on my rig for 5 or 6 years with no vissible corrosion.
Not all do. But, it is not worth taking the chance. Plus, the water sealer on the regular ply is lighter.

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Post by pbw »

I really don't know what kind of plywood to use. I went last night thinking I would get 5/8 plywood but I've never paid any attention to all the types of plywood.

I would use OSB board but some things scare me from it...
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Post by pbw »

No updates today end up driving my father-in-laws truck to pickup a dining room table. So much for picking up plywood in it! Tomorrow I'll be back on track!
Last edited by pbw on 26 Nov 2007, 09:16, edited 1 time in total.
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Post by bassboy1 »

pbw wrote:I really don't know what kind of plywood to use. I went last night thinking I would get 5/8 plywood but I've never paid any attention to all the types of plywood.

I would use OSB board but some things scare me from it...
Don't use OSB.
There are 2 major grades of ply, that can be found at lowes/home depot. First is sheathing. It often has a mediocre ply on one side, and knotty ole things on the other. It is the cheapest, and is mostly used for sheathing, and subfloors on houses. Occasionally, you can find a pallet of this stuff that has a great ply on one side, and a fairly good one on the other. Sometimes the trees they cut it from don't have many knots, but since it hasn't been gone over with a machine to fix it, they still sell it as sheating.
The next is furniture grade (not sure of the actual name) It has footballs in all the voids on the outside plys. It is probably what you want. It is a little pricier, but worth it.

Now, HD/lowes also carry plys with a veneer of a hard wood on them. They are for making furniture with, where you want the wood finish, but don't want to use the real wood, and can't stand that vinyl wood on the MDF, and LDF that much of the cheap furniture is made from. You don't need this, as it is just extra money for something that will be covered by carpet. Now, there is also Birch ply, which is better for certain things, especially when spar varnish will be used, but you don't want that either, as it is rather pricey.

From what I remember, the furniture grade is only in 1/2 and 3/4. (it is in more, but we are looking at a range from 1/2 to 3/4). The sheathing is available in 5/8 as well. You could do just fine with 1/2, especially seeing how close your structure is. Unless you find a great batch of sheathing, you should stick with the furniture grade 1/2 and a good coat of water sealer.

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Post by pbw »

I know osb isn't the best option but it does have advantages, but if water get to it, its over johnny!

Ah First I need to finish the framing. Then see how much wood I need for the deck. Unsure what size I hope I can get by with 1/2 inch. I may buy osb or thick card board to make a template with first. I don't want to destroy a nice piece of plywood with my bad jig saw skills.
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Post by pbw »

Also I need some help/thoughts! How to support the plywood that will run over to the edges of the boat.

I've got a couple in my head just looking for some different concepts.
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Post by Waterwings »

I'm at work right now (on our infamous 30 minute lunch break), but when I get home, and nothing overrides my time, tonight I'll try to generate a drawing of an idea I have and send it to you.
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Post by mtnbasser »

pbw, you may not have to add support to the edges of your deck, depending on how ya support it all. if you run stringers down the length of the deck and get some 3/4" plywood it may support weight on the edges. you could cut the decking material to fit then puzzle piece it together and get a feel for how strong it is. I have a gap on my deck between the last stringer and the edge and does fine, and I'm a big ole boy..280'ish...

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Post by pbw »

Progress updated! Finishing up framing, just two more stud/supports on starboard side remaining.

Image

Image

Image

Below is how I'm connecting to the front studs to the boat, need to buy a couple more brackets.


Image
Last edited by pbw on 26 Nov 2007, 23:06, edited 1 time in total.
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Post by Waterwings »

Lookin' good! :) . Are you going to seal all of the wood bracing before you put the deck down, especially any plywood edges that would soak-up water fairly quick?
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Post by pbw »

Waterwings wrote:Lookin' good! :) . Are you going to seal all of the wood bracing before you put the deck down, especially any plywood edges that would soak-up water fairly quick?


Yes sir! I've been hitting the ends of the boards with some water sealer before installing them. Once I finished the supports I'll give them two coats of sealer.
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Post by bassboy1 »

If it were mine, and I were exactly where you are, using your design for the framing, here is what I would do, provided it doesn't mess up any storage locker plans.
Image
Everything diagrammed is just more of the 2 x 2s you have been using. The red is what I would definitely do. The black is what I would probably do, but at my house, we overbuild everything. In fact, when we build our houses, we look at code, and make it much better quality than code. Most builders will look at how to make a design meet code.
You are right about not wanting the edges to hang free. Plywood will not cantilever well. Sure, you don't stand that far over often, but once you do a time or two, it will start loosening up the screws holding it down to middle stringers. (as in pulling through)

Just my 2 cents worth. Take it or leave it, as you must.

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Post by Waterwings »

Can't wait to see the finished product!
I had an afterthought after I sent you the sketches: You could use a hole saw and drill maybe a 1" diameter hole in the center of each of the gussets and use the holes as a raceway to run cables through. Just another thought.
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