January 1997 Plywood Design Specification APA The Engineered Wood Association PSE FR PRGM LBL CLEAR REG HYP x (i) (i) B P/R RTN R BST RND HYP - 1 SIN - 1 COS - 1 x 2 LN LOG % ON f g R/S S GSB R SST GTO x y In particular, the plywood mills of South East Asia manufacture plywood which they describe as Marine Plywood and to which they apply a stamp stating that it is BS1088. But some defects are allowed on the face/back of low grade (such as C/D grade) general exterior plywood . Marine ply uses a waterproof higher grade of glue in between the layers of veneer which also has less imperfections than standard plywood, and is marked with ‘BS 1088’ meaning: “BS1088 is the British Standard specification for marine plywood that applies to plywood produced with untreated tropical hardwood veneers that have a set level of resistance to fungal attack. It is given the IS 303 grade but some of its specifications would exceed that of MR plywood making it slightly superior. Stress Grade: F17. Edge joints are limited, and end joints are not permitted. endstream endobj startxref Any glue used for marine plywood or for that matter also used in exterior use has to conform to the a stringent test. It is generally considered an excellent material if not as pretty as the higher grade. Alibaba.com offers 999 marine grade plywood specifications products. For sheathing grade panels that will be exposed permanently to the weather, specify APA Rated Sheathing Exterior (C-C Exterior under PS 1.) 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. Emissions: E0 4 Plywood Design and Application Guide PANEL SELECTION Panel Selection, Handling and Storage PANEL GRADES Plywood panels used in typical construction applications in the United States must meet the requirements of the U.S. The BS 1088 standard is a marine plywood specification that applies to plywood made from untreated tropical hardwood veneers that have a stated level of resistance to fungus growth. As usual it boils down to you get what you pay for and it pays to go to a reputable dealer. “Marine” grade faces shall be limited to a total of nine repairs in a 4′x 8′ panel. That is, it's not waterproof. BS 1088 plywood must use a glue, which has been tested and shown to be highly resistant to weather, micro-organisms, cold and boiling water, steam and dry heat. They have extensive publications that can be downloaded for free but you need to register and sign in. Other Exterior Plywood Grades. Marine Plywood to AS 2272 has either AA faces or OO faces. Marine grade plywood is an excellent choice for any application where A wide variety of marine plywood specification options are available to you, such as electric. The Moisture content of the plywood must fall between 6% and 14% when it leaves the factory. Marine Grade Plywood When Design Meets Moisture. Plywood grade and workmanship quality are defined in Voluntary Product Standard PS-1. Marine grade plywood is made by arranging 5 or more plies of Douglas Fir or Western Larch wood in a perpendicular manner so that the grains are alternating from vertical to horizontal. Opinions range from the high and mighty: "Since you are going to spend a lot of time building, you should use the best material available no matter what the cost" to the economy version "Grab some Luan underlay, build a quick cheap boat and get out there and have some fun". In materials, BS 1088 is the British Standard specification for marine plywood that applies to plywood produced with untreated tropical hardwood veneers that have a set level of resistance to fungal attack. If a ply needs to be joined inside it can not be butted. Product Data Sheet Marine Plywood ‘Marine’ grade plywood is a premium panel suitable for use in marine craft and in extreme climates in applications such as vehicle bodies and general building work, as defined in EN 636:2012+A1 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. Bond: A-bond. Glues vary in their tenacity while being boiled. The Advantage of Okoume Marine plywood. To build the best boats, the best quality Marine Grade Plywood must be used. 18mm BS6566 . If decay is a concern, it should be pressure-preservative treated to an appropriate standard. 2 REFERENCES The Panel is sanded on both faces. They are also available in sheets or boards measuring 4 feet by 8 feet. The BS 1088 standard is a marine plywood specification that applies to plywood made from untreated tropical hardwood veneers that have a stated level of resistance to fungus growth. The plies are bonded with Weather Boil Proof (WBP) glue. 3. The Face Veneers must have a solid surface without open defects. Marine-grade plywood, often simply called marine plywood, is not what it's often claimed to be. Marine-grade plywood is a premium quality product made from selected wood species based on density, impact resistance and bending strength. It suitable for the wished applications and to ensure that places and way of use . If your plywood has a very dark or purply glue it is possibly resorcinol or more likely a closely related Phenol Formaldehyde glue. Multi-Ply Construction-- This applies to boards thicker than 4.8 mm (3/16"). There is a possibility of voids. Often used to make boats, their layers are bonded with waterproof glue, so they won’t bubble, buckle, or delaminate with long-term exposure to weather and water. It is intended for use in hulls of boats and other marine applications. None of the marine species are naturally durable and preservative treatment will be required. x 4 ft. x 8 ft.; Actual: 0.734 in. The grain in the veneers should be reasonably regular. Sheets up to 5x12 feet are also available. It is an engineered wood from the family of manufactured boards which include medium-density fibreboard and particle board. Some include: Water-resistant. If a repair needs to be made on an inside ply there are rules for this. However, it is a good It is a good-quality, hardwood plywood made with waterproof glue, but since it's not treated with chemicals it is not rot-resistant. Backs, Centers and Cores: All backs, centers and inner plies shall be “B” grade or better and shall be full length and full width. Australian exterior plywood is typically AC and structural is CD or even Other combinations are possible. From Marine Grade to our proprietary Weyerhaeuser HDF Ultra-Core laminating panels, we engineer our softwood plywood for maximum value. Plywood Grades and Specifications. SF Gate– Plywood is a versatile wood product with applications ranging from woodworking to home building. This standard is very similar to the BS 1088 with somewhat reduced quality. This makes it one of the best marine plywood alternatives/ These foam boards are available in different weights. This is, undoubtedly the biggest benefit of marine plywood. Boards will be equally sanded on both sides. The lightest is 15 pounds per cubic foot, and the heaviest is 28 pounds per cubic foot. They help set standards. Do your homework and be safe. The face veneers are often of slightly lower grade and thinner. This plywood is graded II/III and has ALL BIRCH solid inner plies with no voids for durability and strength. Although a British Standard, it is used by marine plywood manufacturers world wide. x 48 in. Marine Fir Ideal for outdoor or nautical use and anywhere else you might expect your project to be exposed to high moisture for extended periods of time. Prices of BWR ply are about about 20% higher than MR ply. This is a nice paint-grade marine […] Marine Plywood British Specification BS 1088 BS1088-1:2003. APA 3/8"B-B Marine Grade 4x8 10 pieces. Whether it’s cabin cruises, pontoon boats, or any water-based vehicle, they are mostly made from marine Plywood.. F8 as a code to apply a full suite of strength and stiffness properties to plywood products of that stress grade. Lloyds do not continuously inspect production lines or individual plywood sheets. Best marine plywood is made with 100% Okoume veneers and can meet with BS1088 standard. Also read my page on Resorcinol type glues which are sometimes used in marine grade plywood. Marine plywood is manufactured with special exterior glues and improved core in order to resist rot. The layers are glued together with the grain of adjacent layers at right angles. Table 2B details surface appearance grades for specialty Ecoply plywood … It is much more expensive than standard plywood: the cost for a typical 4-foot by 8-foot 1/2-inch thick board is roughly $75 to $100 US or around $2.5 per This page is not specifically a recommendation of products, it is for information and entertainment. Hello Denny, Thank you for your recent inquiry about the BOISE CASCADE AB Marine-Grade Plywood (Common: 3/4 in. The glues are usually essentially the same as the marine grades. %PDF-1.5 %���� Plywood Specifications – Core Gaps Marine Plywood Consists of a solid full grade cores throughout the ply with no core gaps. defined in the AS 2272 standard, they are similar to a B grade face). Plywood is a material manufactured from thin layers or "plies" of wood veneer that are glued together with adjacent layers having their wood grain rotated up to 90 degrees to one another. This is an Australia / New Zealand standard. Products claiming compliance with this standard must also carry the specified markings, which includes a reference to EN 636. Marine Plywood Australian made Marine plywood is manufactured to AS/NZS2272. Lloyds do not continuously inspect production lines or individual plywood sheets. Marine Plywood British Specification BS 1088 BS1088-1:2003 The British Standard BS1088 in its various edicions is the mostly widely followed around the world. What is Marine Grade Plywood? This alternation of the grain is called cross-graining and has several important benefits: it reduces the tenden Hoop pine is often used. Roseburg Marine Fir AB is marine-grade plywood that is produced entirely of Fir veneers. There are standard BS tests for the glue. I don't claim to be an expert. %%EOF Youtube video about making Marine Plywood. They represent engineered wood manufacturers and mandate things such as quality testing, product research, and market development.". Squareness -- The lengths of the diagonals of a sheet shall not vary by more than 0.25% of the length of the diagonal. It is a marine plywood standard using the same glues, but has somewhat more relaxed requirements as to the quality of the veneers. Depending on the grade, knot size and frequency is controlled. Marine Plywood was originally made for the manufacture of marine craft but is increasingly used in building construction, in extreme weather, and in general construction work where durability is required. There are no voids and requirements for joins are similar. It is an extensive document which details all characteristics of the plywood. Marine plywood is made from selected species and therefore has known and consistent structural properties. Understanding the various grades and components used in hardwood plywood construction allows you to use this wide selection of … By meeting BS-1088 specifications, OHC’s Marine Grade Plywood can be insured by Lloyd’s of London. IF you want to build a boat make sure you use the material as instructed by the designer. Exposure 1 above. APA-trademarked plywood is suitable for a variety of end uses including subflooring, single-layer flooring, wall and roof sheathing, sheathing ceiling/deck, structural insulated panels, marine applications, siding, webs of wood I-joists, concrete forming, pallets, industrial containers, mezzanine decks, and furniture. 18mm BS1088. Marine plywood is a type of hardwood plywood. There are many exterior grades being manufactured. Marine grade plywood, for instance, is the highest grade of plywood and differs from other types of plywood in many ways. h�b``�```�` �Y���Y8��,��������Hl�)CąY�ϴ&r����QGk���q1��W���3. 0 There are few international standards for grading marine plywood and most of the standards are voluntary. For this reason Marine Grade Ply must not have voids. Plywood assembled from it needs to be able to withstand boiling in water for several hours without de-laminating. It very often has an epoxy coating, often with glass cloth as well. See Treated Plywood (page 18) for recommended plywood grades The thickness and number of plies is also controlled. �@���dt; b�� ��� R� �l�P�� &A���V`[ցHFs�k? Plywood sold as "void-free" does not have voids hidden in the wood layers. Marine plywood is frequently used in the construction of docks andboats. Plywood is a versatile wood product with applications ranging from woodworking to home building. Okkume is a prime example of a widely used plywood wood which is not particularly resistant to rot and fungus. Benefits of Marine Grade Plywood. It has very low formaldehyde emission and can endure extremely humid weather. It is ideal for boat building and construction work that faces high levels of moisture Using marine plywood offers you with a wide range of benefits. Poor bonds, overlaps and pleats, and gaps in faces are not allowed. One affordable alternative to marine grade plywood is by using ordinary plywood and making it waterproof. On the other hand some manufacturers claim to be up to this standard but are not. Boiling temperatures and steam aren’t a problem either. x 96 in.). Plywood manufactured for construction purposes is specified in accordance with EN 636. “Marine” grade faces shall be limited to a total of nine repairs in a 4′x 8′ panel. There is some confusion among specifiers concerning the properties of "exterior grade" plywood. The data provided in this product specification should be used solely as a guide and is of no contractual value. Marine-grade plywood sheets meet BS 1088, an international standard for plywood made from water- and fungus-resistant hardwood. 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. Manufacturers shave thin wood layers, called veneers, from logs. Marine-grade plywood sheets meet BS 1088, an international standard for plywood made from water- and fungus-resistant hardwood. Voids not only weaken the plywood but create a ready path for water infiltration. In particular, the plywood mills of South East Asia manufacture • Stress grade that utilises the symbol F and a suffix e.g. (See Figure 1.1.) Table 2A summarises the surface appearance grades in which Ecoply structural plywood is available with some typical applications for each surface grade. Sample Specification for Marine Grade. Manufacturing Defects are strictly controlled. The standard defines the The standard defines the following panel attributes that are important for the marine industry. Finished size The length or width of a standard sized sheet can not be less than the stated size nor more than 6.3 mm (0.25") larger. You can do this because all plywood, including the marine type, are made with the same adhesive, Type A Phenolic Bond Often used to make boats, their layers are bonded with waterproof glue, so they won’t bubble, buckle, or delaminate with long-term exposure to weather and water. Marine-grade plywood is perfect for use in the marine industry where greater moisture applications requiring a high-quality face and back that is factory sanded and ready for further finish. Marine plywood is manufactured with special exterior glues and improved core in order to resist rot. Their main focus is construction. Specification Plywood used in the UK is sourced from all over the world and is often manufactured to overseas standards. 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. Product Specifications. Marine plywood is a purpose-built structural plywood with a permanent Type A bond. Another benefit of marine grade plywood is that the edges tend to both cut and sand cleaner than the standard plywood. Marine grade plywood the perfect exterior plywood , the major demand of plywood marine is 3/4 marine plywood , the 18mm Malaysian waterproof marine plywood is the best quality in the industry, however, we provide a high quality with same grade from Vietnam, but different in marine plywood price lead to be a great choice for our partners. 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. The Engineered Wood Products Association of Australasia is a rich source of information and explains the standard in more detail. In other words Lloyd's ensure that the standard in production is met. Standard: BS1088 Grade. They flatten and grade the veneers, then glue them together in a process that uses heat and pressure. grade,free of heartwood on all four sides,is appropriate where all sides are vulnerable to marine organisms, such as in jetties. Most of us would prefer to understand the options a bit better. Boats have been successfully built using higher grade exterior plywood. Often a high end exterior ply will do as well particularly in area that do not particularly stressed. It is constructed with exterior pholic resin glue. Often gimmicked as Boiling Water Proof BWR which stands for Boiling Water Resistant plywood is inferior to BWP but superior to MR. I have used both grades and have not seen any defects in either. Marine Plywood समुद्री प्लाईवुड - marine ply manufacturers, suppliers & exporters in Haryana, India. “Seawall” grade, which is suitable for sheet piling, is heartwood- There are several grades and qualities in marine Plywood which directly affects its cost.. Why Marine Plywood. Has legal effect It has two ‘A’ grade faces, minimal core gap and bonded together with a permanent A-bond resin that will not deteriorate under wet conditions, heat or cold. Hardwood Plywood Specifications The wide array of veneer, grade, core and finishing options that go into a sheet of plywood offer endless possibilities. Marine-grade plywood is not treated with any chemicals to enhance its resistance to decay. Imported marine ply is Core veneers requirements are similar to face veneers except that slits are allowed as long as they are small. Plywood is manufac- tured with an odd number of layers, each layer consisting of one or more sheets of veneer (thin sheets of wood). MARINE PLYWOOD — SPECIFICATION ( Second Revision ) 1 SCOPE This standard covers requirements for materials, manufacture and performance of marine plywood suitable for the construction, repair and maintenance of marine and river craft, pontoons and the like. A wide variety of marine grade plywood specifications options are available to you, such as usage. Marine-grade plywood is available in 4x8-foot sheets of 1/4, 3/8, 1/2, 5/8 and 3/4-inch thickness. That is, it's not waterproof. Marine Plywood must use an adhesive which has been proven to be highly resistant against different environments. 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. Multi-Ply construction according to Bristish Standard (BS1088): Each face veneer shall be a minimum of 1.3mm and not thicker than 3.8mm No defects (except sound pin knots) are allowed on the face/back of marine plywood . Durability and Strength: No other plywood is more durable than marine-grade plywood. Manufacturers shave thin wood layers, called veneers, from logs. My page on Marine and Exterior plywood glue. This perpendicular arrangement of the individual plies is … Marine-grade plywood is not treated with any chemicals to enhance its resistance to decay. Marine Plywood manufactured to AS/NZS 2272 standard, is a structural plywood intended for hulls of boats and other marine applications. Pin knots and edge joints are also allowed. Bright finishes are not necessarily as successful as with the BS 1088. Roseburg’s AB Marine Panel is marine-grade plywood that is produced entirely of Group 1 species of veneer. We are Marine Plywood Manufacturers, Marine Grade Plywood Manufacturer, Marine Plywood Bwr Grade supplier and exporter of marine grade plywood sheets. Marine plywood is a robust and high-quality product engineered from Douglas-fir or Western Larch that is not chemically treated. Neither edge of a panel Marine Fir. Neither edge of a panel shall have any cross band gap nor edge splits in excess of 1/8″ wide or four occurrences. The maximum core-gap size permitted is 1/8 inch. BS 1088 plywood must use a glue, which has been tested and shown to be highly resistant to weather, micro-organisms, cold and boiling water, steam and dry heat. Plywood made to this standard is amongst the very best in the world. The maximum core-gap size permitted is 1/8 inch. The outside veneers vary a great deal depending on the chosen grade. 65 0 obj <>/Filter/FlateDecode/ID[<665762B63B58EC4E83ABE7835016DC41><665762B63B58EC4E83ABE7835016DC41>]/Index[7 72]/Info 6 0 R/Length 194/Prev 169623/Root 8 0 R/Size 79/Type/XRef/W[1 3 1]>>stream You may not always need the absolute best grade of plywood. Southern Yellow Pine We offer a variety of grades and thicknesses of Southern Yellow Pine plywood panels to meet most budgets in virtually any application. Using a better grade will result in a higher value (including resale value), increased longevity of the boat, and a reduction in building time. Marine Plywood A more durable species is selected to ensure our Marine plywood is able to resist rotting in a high-moisture environment. Ideal for outdoor or nautical use and anywhere else you might expect your project to be exposed to high moisture for extended periods of time. Gaps may be filled using veneer inserts glued with appropriate adhesive. As in face veneer, end joints are forbidden. 78 0 obj <>stream Many plywood are made according to the BS 1088 marine plywood standard but they have not all gone to the trouble and expense of getting certified. This is WBP glue and stands for "Weather and Boil Proof". The British Standard BS1088 in its various edicions is the mostly widely followed around the world. Some marine plywood has a Lloyd's of London stamp that certifies it … Since it's not treated with chemicals it is not rot resistant. Common Plywood Applications. Marine plywood is manufactured from selected species based on density, bending, strength, impact resistance and surface finish characteristics and is ideal for the use in boat hulls, decks and cabin tops as well as other marine applications. To make the marine plywood sheets, the thin plies are set up perpendicularly in a plywood-making process known as cross-lamination that gives the material a lot of strength. The maximum core-gap size permitted is 1/8 inch. Marine plywood can be graded as being compliant with BS 1088, which is a British Standard for marine plywood. You can also choose from family homes, developing world water solutions, and irrigation and agriculture marine plywood specification, as well as from low pressure marine plywood specification, and whether marine plywood specification is ce. The marine plywood is rarely left unfinished. The plywood can be structural and non-structural. I'm not an engineer or a chemist. Plywood Specifications A quick overview Standards AS/NZS 2272:2006 (usually called AS2272) The Australian marine plywood standard. This web site reflects my personal ideas and doesn't represent anyone else's point of view. "APA – The Engineered Wood Association is a nonprofit trade association of the United States and Canadian engineered wood products industry. Marine Plywood is always better than common plywood, even if you want to use it for exterior, interior, and marine applications. Veneer for panels covered in this Specification is usually “rotary peeled” rather than sliced or sawn. In case you weren’t aware of marine grade plywood and what gives it its name, let’s go through a complete breakdown of everything you could hope to know about marine grade plywood. Different types of plywood have different grades and specifications that indicate their … 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. "�Y`0��=��x I=�-"�aDR)��>����P��g� �n"`WIx�Uƀ���_}*0���u10RD��� � Zq"� Examples of projects marine grade plywood is best for If you’re considering making outdoor patio furniture or even outdoor structures that are made of wood, and you live in a moist climate, then Marine grade plywood will hold up longer than standard plywood. 7 0 obj <> endobj Backs, Centers and Cores All backs, centers and inner plies shall be “B” grade or better and shall be full length and full width. I make mistakes. The Marine-grade plywood is sanded on both faces. All plywoods bind resin and wood fibre sheets to form a composite material. The material has a high tolerance for moisture. Marine Plywood is a renowned material when it comes to the construction of boats. The plywood does not have to be of British Manufacture. Furniture, building and the maritime industry is … h�bbd```b``��6`���D�_��G�$��BR3L��� �,�Q ��fG�Hn�9 Interesting to see the process though. Available grades are A-A, A-B, B-B (face-back), MDO and HDO. Phenol Formaldehyde which is often used in marine plywood. Although this is a British Standard, the finished product does not have to be made in Britain, just manufactured to meet the standard. PRODUCTS PROFILE Marine-grade plywood , often simply called marine plywood, is not what it's often claimed to be. The surface grade specifications are defined in AS/NZS 2269.