Someone will correct me if I am wrong, but most of the pine plywood these days seems to be coming from South America. In the southeast United States pine plywood is almost all plantation grown in the southeast. We can custom build to any design - for example those by Iain Oughtred, David Payne, Paul Gartside, John Welsford, Mark Bowdidge, Francois Vivier, Atkin , Bolger B&B etc. Location: finland Birch Plywood in boatbuilding I am sort of beginner in all boat business - however I do have patience.
However I will be moving back to Finland in 5 or so years and will have family farm with its ample space to work on things.
Location: NSW Australia Birch Plywood Heikki, birch is a very pretty wood and the sap makes a great home-brew wine (as an old Scots Highlander I know) but like most soft woods when converted into ply is easily bruised.
But (and here's the Highland Scot coming to the fore) if it's cheap and plentiful - then go for it. Location: Eustis, FL Another note is to insure the plywood panel has a proper rating for it's intended use, such as BS 1088. Here is a picture of an Open 60 (Ocean Planet) that has done two single hand around the world races.
Location: NSW Australia Birch in Boatbuilding What a great picture DGreenwood Senior - taken by a camera strapped to an albatross no doubt - unless the camera like the albatross was hung round your neck But a superb shot however taken. Location: New York The really great thing about that shot is being able to see the consistant sail shape from bottom to top even though it is quite a flexible unstayed rig. As Par says, you gotta make sure you have the right stuff before you can screw , glue or guarantee any thing.
I would always favor the material that lives well under a coat of paint alone, but then, I'm very low tech. Location: Trondheim, NORWAY This boat is built of meranti, pine and birch plywood. Location: maine It would be interesting to see how some older boats have fared.
Location: Trondheim, NORWAY Okoume (for example) is not very rot resistant either, so if birch is treated right it may last. Those are softwoods, of course, but panels would be thicker at the same weight, and hence stiffer for their weight. Birch is very cheap here compared to ANY other ply except possibly phillipine mahogany, for example.

I imagine that a manufacturer that had some process of treating plys with mildewcide, etc., could produce decent panels not requiring full encapsulation, and that would make a pretty good marine panel. Most of my exterior boat structure (only hull is fiberglass) is marine fir, which appears fine under paint alone after perhaps thirty years. Location: Eustis, FL Birch is a fine wood and can be used, but it will need some protection. Since you have the availability, check the glue used (needs to be WBP), the general panel construction (number of voids, repairs, veneer count, etc.) and use the stuff, with an eye toward protecting it against abrasion and moisture ingress.
Location: UK Birch veneers were used after WW2 by Fairey Marine when they started building their hot molded wooded boats.
There are plenty of the early Fireflies, Nat 18's, Swordfish, Albacores around after 60 years that haven't ever seen a drop of epoxy. When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. To get WoodenBoat delivered to your door or computer, mobile device of choice, etc, click WB Subscriptions. The landscape timbers sold around here are the cores from the shaving operation with the top and bottom shaped flat. We utilise both traditional methods such as carvel or clinker and modern methods such as strip planking, cold molding or clinker plywood. 2269 Furniture grade plywood with the highly figured decorative grain of Kadaumu (Cedar). I am building up momentum into starting some sort of boat projects and I know that you can get really nice birch plywood at very reasonable prices back home. Sure you could use it for boat building- BUT - it will need to be throughly sealed both inside and out - and in doing so you'll lose much of its natural beauty. When that thing flexes like that it scares the bejeezus out of you but it is fact very reliable. The best, of course, is entombing it in plastic (epoxy), but well cared for painted panels could do okay. In my mind this means well coated with epoxy for hull and weather deck applications, with cloth sheathing in high traffic or exposed areas (exterior hull surfaces, soles, etc.). Since it's going to be rotary cut regardless it is hard to tell by appearance alone, though fir tends to be slightly redder. The most fascinating piece to me was the lathe that shaved the veneers off of the barked logs.

When exposed to weather it turns black although I haven't had any delaminate or rot to pudding or punk. All Hoop Pine veneers so machining and routing will give good solid edges - suitable for toy making, joinery etc. Unless of course you intend to hide it under several layers of paint ( and that would be a pity). The outer veneer should be darn near the same thickness as the other, interior veneers, to provide strength. To be exact it is 2mm aircraft Finn birch on either side of 25mm Nomex impregnated Kevlar honey comb. Keep it sealed and it is stiff and strong and usually almost 100% void free and available in higher veneer count than most other non marine plywoods. With a few patches of carbon reinforcement to take some of the larger tension loads it was bulletproof and showed no signs of movement or fatigue. When the landscape timbers are not needed, the cores are taken down as small as possible, 3" I believe. Wasn't completely automated, an operator sat in the pilots seat and ran the pick and place part with a joy stick. The cores, and all of the scraps trimmed from the veneers are chipped and used as fuel for the boiler.
A set of knives would last around 2 hours, and were changed at the morning break, lunch, and afternoon break. They use the steam from the boiler as heat for the glue presses as the adhesives are heat-set. All the veneers were computer graded for face, back, or core and the face and back veneers patched with footballs as needed. A lot of automation, but still a lot of people moving around taking care of things, probably 500 employees.

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