In other words Lloyd's ensure that the standard in production is met. The highest quality grade of veneers are used in every layer and these veneers don’t have defects, eliminating core gaps when the sheet is cut. As in face veneer, end joints are forbidden. INCHES Millimeters PW ALUM STEEL. Hydrotek is used in … The capacity of a plywood to not de-laminate under boiling is not only dependent on the quality of the glue but also on the materials used and the care which was used in the manufacture. Our calculators can simplify your woodworking project layout and estimation. Different species of woods have varying densities. The outside veneers vary a great deal depending on the chosen grade. A piece of plywood weighs approximately 600kgs per m³. Okoumé Marine plywood is graded as being compliant with BS-1088, which is a British Standard for marine plywood. In addition to using different amounts of glues and resins, different types of resin vary in weight. Marine plywood is manufactured from selected species based on density, bending strength, impact resistance and surface finishing characteristics. Lloyds do not continuously inspect production lines or individual plywood sheets. Different grades of plywood may also have more or fewer voids than others, which might slightly impact the weight. The glues are usually essentially the same as the marine grades. Pressure-Treated Plywood: This is generally a softwood plywood that has been pressure-treated to help it resist decay caused by fungus, insects, and other organisms. Depending on the grade, knot size and frequency is controlled. Weight per 4' x 8' 15. Click to see full answer. Here is a somewhat inaccurate and simplified "How it's Made " video on Marine Plywood. Similarly, how much does treated plywood weigh? Aquatek marine plywood is manufactured with Keruing faces to ensure both strength and durability, while the core is comprised of uniform color light red Meranti to maintain the strength and durability to weight ratio. The glue for marine plywood should be … Okoumé Marine plywood is graded as being compliant with BS-1088, which is a British Standard for marine plywood. Light Weight Gaboon (Okoume) Marine Plywood. A 4-by-8 sheet of plywood equals 32 square feet, so 32 times 2.3, is just over 70 pounds per sheet. THICKNESS WEIGHT PER SQ/ FT. Voids not only weaken the plywood but create a ready path for water infiltration. Poor bonds, overlaps and pleats, and gaps in faces are not allowed. Marine-grade plywood, often simply called marine plywood, is not what it's often claimed to be. They have extensive publications that can be downloaded for free but you need to register and sign in. Face Veneer thickness -- For any three-ply construction, each veneer sheet will not be any thinner than 1/8 of the total thickness of veneers assembled dry. ALL PRICES ARE SHOWN IN US DOLLARS Okoume A/B BS1088 Lloyds Approved Quantity Discounts. The plywood does not have to be of British Manufacture. True hardwood plywood is made with thin layers of 100 percent hardwood, which generally is stronger and harder and has a finer grain than softwood. 71. Compared to other marine and exterior hardwood plywood’s, the plywood offers a weight saving of up to 25%. Boats have been successfully built using higher grade exterior plywood. The actual weight of plywood varies by product and manufacturer which can make it challenging to predict the weight perfectly. Pressure-Treated Plywood: This is generally a softwood plywood that has been pressure-treated to help it resist decay caused by fungus, insects, and other organisms. 1.75 lbs. This page is not specifically a recommendation of products, it is for information and entertainment. None of the marine species are naturally durable and preservative treatment will be required. Both face and inner plies are constructed from whole piece, color matched, Meranti or Keruing veneers. If a repair needs to be made on an inside ply there are rules for this. It is the cheapest of options for marine plywood, and the faces may have up to five patches or repairs but no voids. Gaps may be filled using veneer inserts glued with appropriate adhesive. Face veneers must be free of knots except "sound pin" knots, (no more than six in any one square foot,) the average of pin knots cannot exceed 2 per square foot over the whole surface of the plywood sheet. That is, it's not waterproof. There is a possibility of voids. They set voluntary standards and many manufacturers adhere to them. Core veneers requirements are similar to face veneers except that slits are allowed as long as they are small. It is also easier to find. The grain in the veneers should be reasonably regular. Get results in imperial and metric measurements. A sheet can cost $10 to $50, as opposed to the cost of marine plywood, which ranges from $70 to over $200 a sheet. A few factors impact the weight of plywood. Plywood sold as "void-free" does not have voids hidden in the wood layers. Squareness -- The lengths of the diagonals of a sheet shall not vary by more than 0.25% of the length of the diagonal. A big benefit of using marine plywood sheets is that it’s easy to machine and work with, as it has a great strength to weight ratio. 2.0 quality control This standard is very similar to the BS 1088 with somewhat reduced quality. The Okoume specie is used extensively in wooden boat building for its ideal strength and durability-to-weight ratio, and is grown only in the equatorial west True hardwood plywood is made with thin layers of 100 percent hardwood, which generally is stronger and harder and has a finer grain than softwood. If the plywood is required structurally then this becomes a messy problem indeed. I'm not an engineer or a chemist. Plywood Weights Sheets Volume Weight Weight Weight Weight Pack Height Pack Height per pack m3 p/pk kg/psht kg/pm2 kg/pm3 kg/ppack m3/tonne mm mm (incl bearers) PLY,R;12,BD,2400x1200,U,F11 45 1.555 19.0 6.6 550 855 1.8 550 625 Video of the Day IF you want to build a boat make sure you use the material as instructed by the designer. The Engineered Wood Products Association of Australasia, UV RESISTANT MARINE GRADE EPOXY RESIN (1 Gallon Kit) * CLEAR * NON-TOXIC * BOAT * BAR TOP * TABLE TOP * FIBERGLASS * WOOD * LAMINATING, Ultrasimple Boat Building: 17 Plywood Boats Anyone Can Build, 2" Woven Fiberglass Cloth Tape E-Glass Fiber Fabric Plain Weave, Reinforced Repair Winding, Seams, Boat, Molding, Fiberglass Laminating Roller, Bubble Buster, Aluminum Head, 1/2" x 3", Building a Plywood Stitch and Glue Apple Pie Pram Tender, KJP Select hardwood stocks some marine plywoods. Especially when weight has to be taken into consideration. Click to sort by plywood weight or percentage. The Moisture content of the plywood must fall between 6% and 14% when it leaves the factory. Douglas Fir marine plywood is very strong, bends well, and is of medium weight. Marine Plywood must withstand the 72-hour boil test as laid down in AS 086. Since it's not treated with chemicals it is not rot resistant. Santa Clara Marine Plywood Built to Last. Phenol Formaldehyde which is often used in marine plywood. Only permanent thermo-setting adhesives of the phenolic type are used in production. I make mistakes. Weight may vary slightly by manufacturer and product. Plywood panels rated as Exterior but not Marine, such as A-B, A-A or C-C Exterior, may contain any other permissible species and contain C-grade veneer. WarriorII, Depending on how wet the board is, you can expect it to weigh between 60 and 66 pounds. This makes it one of the best marine plywood alternatives/ These foam boards are available in different weights. MARINE PLYWOOD Joubert Okoume Wolstenholme International was one of the first companies to offer a FSC certified Okoume marine plywood in the North American market. * A wide variety of weight for marine plywood options are available to you, such as graphic design, total solution for projects, and others. Better grades also tend to be lightweight, strong, and virtually free of defects. The Face Veneers must have a solid surface without open defects. An additional Delivery Area Surcharge of $35 may apply for some zip codes that qualify as "beyond points." At 560 kg/rns density. They are also available in sheets or boards measuring 4 feet by 8 feet. This material offers weight savings that range from 30% to 60% compared to conventional plywood. Available in five densities ranging from 15 pounds to 26 pounds per cubic foot, Reinforced Polyurethane Foam complements 3M’s existing line of … fractions decimals. Please Note: Prices, promotions, styles and availability may vary by store and online. The face/back veneers of plywood weight practically much less than the core veneers. A piece of plywood weighs approximately 600kgs per m³. As usual it boils down to you get what you pay for and it pays to go to a reputable dealer. Remember these are the weights per square foot of the planking material, the interior structure will also be proportionately heavier. Calculate the size of a cabinet door based on the opening and generate a cut list of parts, including rail, stile, and panel dimensions. Some logic will make it apparent that switching smaller designs from plywood to steel is ill advised. MARINE PLYWOOD . In order to be a Marine Grade the plywood has to conform to a certain number of criteria: Here is a Youtube video about making Marine Plywood.It is how one company makes it and not necessarily representative of all marine plywood but it is interesting. It very often has an epoxy coating, often with glass cloth as well. Re: 3/4 vs 1/2 marine plywood weight? Any glue used for marine plywood or for that matter also used in exterior use has to conform to the a stringent test. 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