What you all think???

[1983rinker]

I took out all wet and rotten wood out of transom. I'm going to replace with oak wood and glass it over.

 

[Bondo]

Re: What you all think???

I'm going to replace with oak wood and glass it over.

Ayuh,... Oak isn't the best choice of wood,...

CDX Plywood would be Better wood than Oak....

Red Oak just rots to quickly, 'n White Oak needs to be boiled, or it'll rot even Quicker than the Red Oak...

 

[1983rinker]

Re: What you all think???

Cdx it is then, i picked oak because of its stringth.

 

[DALLEN7]

Re: What you all think???

that is why you use fiberglass and resin you may want to check your stringers too. if transom is rotted then good chance your stringers are too.

 

[Silver Heels]

Re: What you all think???

Just throwing this out there, the framing on many wood boats is oak. The wood in plywood is spruce/pine/fir, which (while the glues in the plywood may be water and rot proof), the wood most certainly is not waterproof, as evidenced by the countless rotten transom posts. I think we on this forum should examine 183rinker's idea a little more closely, rather than have discard it because it doesn't jive with our way of thinking that says plywood is the better/best/only/etc way to go. Maybe he's on to something, a 1 1/2 inch oak board is incredibly strong, and I would argue stiffer than the same size in plywood. I would also argue that oak is better against rot than plywood, which has endgrain on every edge (that point is probably moot if one takes the time to glass over the plywood. Things to consider are the limited width provided by an oak board if the transom is deep, and the tendancy of solid wood to cup if it picks up moisture. White oak is considerably denser and stronger if you decide to give it a try. Thanks for sharing an idea for an alternative way to approach boat repair. When I read posts, some people have some pretty wacky ideas. This one warrants at least a second look.

 

[Bondo]

Re: What you all think???

Just throwing this out there, the framing on many wood boats is oak. White oak is considerably denser and stronger if you decide to give it a try.

Ayuh,... Like I said,...
White Oak is Fine,.... After it's Boiled...

 

[Yacht Dr.]

Re: What you all think???

Your right about oak being encredibly strong.. but not for transoms.

Ribs or stringers would be a better canidate for oak ( from the direction of the grain ).

There is the possibility of the board Snapping. Thats why ply is so good for transoms..the grain goes in two directions making it Very strong no matter which way the load is bearing on it.

Its cheaper and stronger IMO .. what more could you ask for .

YD.

 

[1983rinker]

Re: What you all think???

Ok so cdx is good for transom? How abought two 1/2" oak with one grain one way and the other the other way? I olny need 1" thick pice to fill in spot. The stringers are good on boat. As you can see in photos i took out rotten wood. Rest of transom is very strong with no flex. I'm just glad I caught it before it got bad. The boat is 28 years old so I thought it wood be worse. But not at all. I'm glad for that. Now there is one more 1" of wood behind of what I took out of transom that is very strong. So the boat has a 2" thick transom. So that is good?? I got a 75 hp on her.

 

[1983rinker]

Re: What you all think???

I plan to use this for the floor too. http://www.herculiner.com/index.html
Color gray floor and blue carpet on the sides.

 

[1983rinker]

Re: What you all think???

Well????

 

[MTboatguy]

Re: What you all think???

Even if you laminate the oak, your not going to get the strength you will with good quality plywood laid up properly and sealed. Oak is good for some things and not so good for others. As far as bed liner for the floor, I would be hesitant to use it, but if that is your preference, then make sure everything is as clean as possible, I know I had the inside of a jeep tub done with it, and there were a couple of spots that started to peel, it was a pain to get it off to redo.

I always like to think when I rebuild something I will never have to tear it apart again, but after over 50 years on this planet, the best laid plans always seem to have a bug in them somewhere!

 

[1983rinker]

Re: What you all think???

Thanks for all the info..

 

[1983rinker]

Re: What you all think???

Even if you laminate the oak, your not going to get the strength you will with good quality plywood laid up properly and sealed. Oak is good for some things and not so good for others. As far as bed liner for the floor, I would be hesitant to use it, but if that is your preference, then make sure everything is as clean as possible, I know I had the inside of a jeep tub done with it, and there were a couple of spots that started to peel, it was a pain to get it off to redo.

I always like to think when I rebuild something I will never have to tear it apart again, but after over 50 years on this planet, the best laid plans always seem to have a bug in them somewhere!

i have the floor near perfection to apply the liner.

 

[tin]

Re: What you all think???

All I can say is USS Constitution


The Naval Act of 1794 provided for the construction of four ships carrying forty-four guns each, and two ships carrying thirty-six guns each.[7] Constitution was the second of the forty-four gun frigates to be completed, and was given her name by President George Washington.[8] Her keel was laid down on 1 November 1794 at Edmund Hartt's shipyard in Boston, Massachusetts, under the supervision of Captain Samuel Nicholson and naval constructor George Claghorn.[2][9]

Primary materials used in her construction were white pine, longleaf pine, white oak, and, most importantly, southern live oak, which was cut and milled at Gascoigne Bluff in St. Simons, Georgia.[9] Southern live oak, a particularly dense wood, can weigh up to 75 lb (34 kg) per cubic foot (1,201 kg/m3). Constitution's hull was built 21 inches (530 mm) thick in an era when 18 inches (460 mm) was common.[10] Her length between perpendiculars was 175 ft (53 m), with a 204 ft (62 m) length overall and a width of 43 ft 6 in (13.26 m).[5] In total, 60 acres (24 ha) of trees were needed for her construction.

 

[Woodonglass]

Re: What you all think???

Correct me if I'm wrong but I don't think the US Constitution had to worry about the stresses of an Outboard tugging and pulling on the stern. As others have said, Oak has its place but it is NOT the BEST choice for modern outboard boats. It CAN be used but... Plywood I truly believe the educated marine engineers employed by the boat manufacturers would ALL be using it IF it were the BEST choice. Especially the HIGH END mfgs, and They Are NOT! Experience is a GREAT teacher. my 60 years on this old planet have given me a little experience and for me properly prepared plywood (HDO variety) for transoms is the best way to go.

I'm just sayin...

 

[tin]

Re: What you all think???

I Digress to your experiance........and agree however the mast's stresses must have been intense considering their height.........

 

[1983rinker]

Re: What you all think???

I'm getting plywood tomarow.

 

[oops!]

Re: What you all think???

the real problem here is rot....once the wood is encapsulated with fiberglass.....what does it matter????

in all the transoms i have done.......the reason for rot is someone screwed something to the transom and didnt seal the hole !.

you drill the hule....fill it with sealer...than put in your screw.

oak...pine...ply......CARDBOARD..!!!!....it all must be sealed !

 

[1983rinker]

Re: What you all think???

the real problem here is rot....once the wood is encapsulated with fiberglass.....what does it matter????

in all the transoms i have done.......the reason for rot is someone screwed something to the transom and didnt seal the hole !.

you drill the hule....fill it with sealer...than put in your screw.

oak...pine...ply......CARDBOARD..!!!!....it all must be sealed !

True.

 

[1983rinker]

Re: What you all think???

New photos of transom with top pulled up and a trial piece.