Hoop pine is often used. Marine-grade plywood, often simply called marine plywood, is not what it's often claimed to be. The glues are usually essentially the same as the marine grades. Different species of woods have varying densities. A panel made up mostly of particles and glue(MDF) will be much denser than plywood with many voids and less glue. Unless specially improved, C-grade veneer is permitted to contain knots and knotholes up to approximately 1-1/2 inches across, and the inner plies may have core gaps up to 1-inch wide. Lloyds do not continuously inspect production lines or individual plywood sheets. Marine Plywood is manufactured from durable face and core veneers, with few defects so it performs longer in humid and wet conditions. The face veneers are often of slightly lower grade and thinner. In addition to thickness, the type of plywood is a major factor in how much it weighs. Sure, marine plywood has already proven itself in this regard, but it is rather expensive. The face/back veneers of plywood weight practically much less than the core veneers. 98. I don't claim to be an expert. Marine plywood is manufactured from selected species based on density, bending strength, impact resistance and surface finishing characteristics. Marine plywood is manufactured from selected species based on density, bending strength, impact resistance and surface finishing characteristics. Weight per 4' x 8' 15. Marine Plywood Okoume (aucoumea klaineana) also known as gaboon or combogala, is only found in Gabon, the Congo and Equatorial Guinea in Africa. Selected Okoume throughout plywood meeting the British Standard, BS 1088:2018 with the Lloyd's Register Type Approved certificate, Marine Ply is widely recognised by professionals in boat construction: racing or recreational boats, manufacture of kits for kayaks, canoes and wooden boats. A piece of plywood weighs approximately 600kgs per m³. They represent engineered wood manufacturers and mandate things such as quality testing, product research, and market development.". This makes it one of the best marine plywood alternatives/ These foam boards are available in different weights. What is the weight of marine plywood? The Moisture content of the plywood must fall between 6% and 14% when it leaves the factory. The calculation is simple: Length x Width x Height x 600. Orders of Marine Plywood totaling more than 100 lbs, will require a rate quote. It is an extensive document which details all characteristics of the plywood. This web site reflects my personal ideas and doesn't represent anyone else's point of view. It has a Type A (wbp) phenolic bond glue and is manufactured from woods based on density, bending strength, impact resistance and surface finishing characteristics. Although a British Standard, it is used by marine plywood manufacturers world wide. BS-1088 grading requires the same species throughout (face, back, and core), defect-free A Grade Face veneer with no repairs. How many sheets is 3/4 plywood? weight for different varieties and thicknesses of plywood, Feet and Inches Length Measurement Calculator. 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. 71. Marine Plywood manufactured to AS/NZS 2272 standard, is a structural plywood intended for hulls of boats and other marine applications. For marine plywood : According to marine plywood standard BS 1088 , the thickness of face/back veneers for multi-ply construction should be 1.3 ~ 3.8 mm; for three-ply construction, the thickness should be about 0.5mm . Marine plywood is available in the following grades: A-A, A-B, and B-B. Water & boil proof glue (WBP), Whole piece rotary cut face, Minimum 1.2mm face veneer thickness . 1/8” .125” 3.2 mm .49 lbs. So the density of plywood is mainly depended on the timer species of the core veneers . Whilst naturally resistant to decay and the ingress of moisture, it is still important to ensure that once in situ both the edges and faces of the plywood are well sealed in order to increase service life. Read on to learn more about what impacts the weight and find the weight for different varieties and thicknesses of plywood. This material offers weight savings that range from 30% to 60% compared to conventional plywood. Any glue used for marine plywood or for that matter also used in exterior use has to conform to the a stringent test. There is a possibility of voids. The lightest is 15 pounds per cubic foot, and the heaviest is 28 pounds per cubic foot. Its exposure durability rating is EXTERIOR and the glue used is a water resistant structural adhesive. Okoume has a high strength to weight ratio which is why it is the plywood of choice for racing boats and applications where weight is important. Marine-Grade Plywood For boat-building applications, a special grade of plywood, APA Marine Exterior, is available. Lloyds do not continuously inspect production lines or individual plywood sheets. Gaps may be filled using veneer inserts glued with appropriate adhesive. Use our plywood calculator to find how many sheets of plywood you need for your project. A sheet can cost $10 to $50, as opposed to the cost of marine plywood, which ranges from $70 to over $200 a sheet. The calculation is simple: Length x Width x Height x 600. Poor quality plywood. Marine Plywood Okoume (aucoumea klaineana) also known as gaboon or combogala, is only found in Gabon, the Congo and Equatorial Guinea in Africa. Glues vary in their tenacity while being boiled. That is, it's not waterproof. 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. 38. Add and subtract feet, inches, fractions, centimeters, and millimeters with ease. 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. Get results in imperial and metric measurements. Not all plywood is the nominal thickness after drying. "APA – The Engineered Wood Association is a nonprofit trade association of the United States and Canadian engineered wood products industry. Both face and inner plies are constructed from whole piece, color matched, Meranti or Keruing veneers. Marine plywood is a great wood to work with, with a smooth and knot-free surface that’s ideally suited to staining, painting and lacquering for a professional finish. 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