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Old 03-09-2011, 07:41 AM
Andy B's Avatar
Andy B Andy B is offline
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Thumbs up Know your wood to make your own kit....


some thing you need to know if you want to make your own kit....from scratch
Know your wood...Hard woods, flexible wood and soft wood..or light wood..

Lets start with grades most shop built drum kits are built using B Grade unless its a top of the range kit such as Premier,Ludwig where your top and bottom layer may consist of A Grade for a quality finish...

Grade Description
A Face and back veneers practicaly free from all defects.
A/B Face veneers practically free from all defects. Reverse veneers with only a few small knots or discolorations.
A/BB Face as A but reverse side permitting jointed veneers, large knots, plugs, etc.
B Both side as reverse of A/B
B/BB Face as reverse of A/B. Reverse side as reverse of A/BB
BB Both sides as reverse of B/BB
WG Guaranteed well glued only. All broken knots plugged.
X Knots, knot-holes, cracks, and all other defects permited.

Softwood plywood
Softwood panel is usually made either of cedar, Douglas fir or spruce, pine, and fir (collectively known as spruce-pine-fir or SPF) or redwood and is typically used for construction and industrial purposes.

Hardwood plywood
Used for demanding end uses. Birch plywood is characterised by its excellent strength, stiffness and resistance to creep. It has a high planar shear strength and impact resistance, which make it especially suitable for heavy-duty floor and wall structures. Oriented plywood construction has a high wheel-carrying capacity. Birch plywood has excellent surface hardness, and damage- and wear-resistance.

Tropical plywood
Tropical plywood is always made of mixed species of tropical wood in the Asian region. Tropical plywood boasts its superiority over softwood plywood due to its density, strength, evenness of layers, and high quality. It is usually sold at a premium in many markets if manufactured with high standards. Tropical plywood is widely used in UK, Japan, Taiwan, Korea, Dubai, and other major cities worldwide. It is the most preferred choice for construction purposes in many regions.
Special purpose plywood
Certain plywoods do not have alternating plies. These are designed for a specific purpose.
Aircraft plywood
High-strength plywood, known as aircraft plywood, is made from mahogany and/or birch, and uses adhesives with increased resistance to heat and humidity. It was used for several World War II fighter aircraft, including the British-built Mosquito bomber which was nicknamed the wooden wonder.

Decorative plywood (overlaid plywood)
Usually faced with hardwood, including ash, oak, red oak, birch, maple, mahogany, Philippine mahogany(often called lauan), rose wood, teak and a large number of other hardwoods. However, Formica, metal and resin-impregnated paper or fabric bonded are also added on top of plywood at both side as a kind of ready for use in the decoration field.
Flexible plywood
Flexible plywood is very flexible and is designed for making curved parts. In the UK this is known as "Hatters Ply" as it was used to make stovepipe hats in Victorian times.[citation needed] However these may not be termed plywood in some countries because the basic description of plywood is layers of veneered wood laid on top of each other with the grain of each layer perpendicular to the grain of the next.
Marine plywood
Marine plywood is specially treated to resist rotting in a high-moisture environment. Its construction is such that it can be used in environments where it is exposed to moisture for long periods. Each wood veneer will have negligible core gap, limiting the chance of trapping water in the plywood and hence providing a solid and stable glue bond. It uses an exterior Water Boiled Proof (WBP) glue similar to most exterior plywoods. Marine plywood is frequently used in the construction of docks and boats. 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 square foot, which is about three times as expensive as standard plywood. Marine plywood can be graded as being compliant with BS 1088, which is a British Standard for marine plywood. There are few international standards for grading marine plywood and most of the standards are voluntary. Some marine plywood has a Lloyd's of London stamp that certifies it to be BS 1088 compliant. Some plywood is also labeled based on the wood used to manufacture it. Examples of this are Okoume or Meranti
Other types of plywoods include fire-retardant, moisture-resistant, sign-grade and pressure-treated. However, the plywood may be treated with various chemicals to improve the plywood's fire resistancy. Each of these products is designed to fill a need in industry.

Production

Plywood production requires a good log, called a peeler, which is generally straighter and larger in diameter than one required for processing into dimensioned lumber by a sawmill. The log is laid horizontally and rotated about its long axis while a long blade is pressed into it (rather like turning a Swiss Roll against the edge of a ruler), causing a thin layer of wood to peel off. In this way the log is peeled into sheets of veneer which are then cut to the desired dimensions, dried, patched, glued together and then baked in a press at 140 C (280 F) and 1.9 MPa (2800 psi) to form the plywood panel. The panel can then be patched, resized, sanded or otherwise refinished, depending on the market for which it is intended.
Plywood for indoor use generally uses the less expensive urea-formaldehyde glue which has limited water resistance, while outdoor and marine-grade plywood are designed to withstand rot, and use a water resistant phenol-formaldehyde glue to prevent delamination and to retain strength in high humidity.
The adhesives used in plywood have become a point of concern. Both urea formaldehyde and phenol formaldehyde are carcinogenic in very high concentrations. As a result, many manufacturers are turning to low formaldehyde-emitting glue systems, denoted by an "E" rating ("E0" possessing the lowest formaldehyde emissions). Plywood produced to "E0" has effectively zero formaldehyde emissions.[3]
In addition to the glues being brought to the forefront, the wood resources themselves are becoming the focus of manufacturers, due in part to energy conservation, as well as concern for our natural resources. There are several certifications available to manufacturers who participate in these programs. Forest Stewardship Council (FSC), Leadership in Energy and Environmental Design (LEED), Sustainable Forestry Initiative (SFI), and Greenguard are all certification programs that ensure that production and construction practices are sustainable. Many of these programs offer tax benefits to both the manufacturer and the end user.[4]
[edit]Sizes

The most commonly used thickness range is from 0.6 in.(1.6 cm.) to 3.0 in. (76 mm.). The sizes of the most commonly used plywood sheets are 4 ft.(1.2 m.) wide by 8 ft.(2.4 m.) or 3 ft. (0.9 m.) by 6 ft. (1.8 m.). Width and length may vary in 1 ft.(0.3 m.) in increments.
In US, the most commly used size is: 4 ft by 8 ft or 5 ft by 5 ft [5

Applications

Plywood is used in many applications that need high-quality, high-strength sheet material. Quality in this context means resistance to cracking, breaking, shrinkage, twisting and warping.
Exterior glued plywood is suitable for outdoor use, but because moisture affects the strength of wood, optimal performance is achieved in end uses where the wood's moisture content remains relatively low. On the other hand, subzero conditions don't affect plywood's dimensional or strength properties, which makes some special applications possible.
Plywood is also used as an engineering material for stressed-skin applications. It has been used for marine and aviation applications since WWII. Most notable is the British De Havilland Mosquito bomber, which was primarily made out of wood. Plywood is currently successfully used in stressed-skin applications.[citation needed]. The American designers Charles and Ray Eames are famous for their plywood-based furniture, while Phil Bolger is famous for designing a wide range of boats built primarily of plywood.
[edit]Softwood plywood applications
Typical end uses of spruce plywood are:
Floors, walls and roofs in house constructions
Wind bracing panels
Vehicle internal body work
Packages and boxes
Fencing
constructing house
There are coating solutions available that mask the prominent grain structure of spruce plywood. For these coated plywoods there are some end uses where reasonable strength is needed but the lightness of spruce is a benefit e.g.:
Concrete shuttering panels
Ready-to-paint surfaces for constructions
[edit]Birch plywood applications
Coated special birch plywood is typically used as a ready-to-install component e.g.:
Panels in concrete formwork systems
Floors, walls and roofs in transport vehicles
Container floors,
Floors subjected to heavy wear in various buildings and factories,
Scaffolding materials
Birch plywood is used as a structural material in special applications e.g.:
Wind turbine blades
Insulation boxes for Liquefied Natural Gas (LNG) carriers
Smooth surface and accurate thickness combined with the durability of the material makes birch plywood a favourable material for many special end uses e.g.:
Die-cutting boards
Supporting structure for parquet
Playground equipment
Furniture
Signs and fences for demanding outdoor advertising
Musical instruments
Sports equipment
[edit]Tropical plywood applications
Tropical plywood is widely available from the South-East Asia region, mainly from Malaysia and Indonesia. Tropical plywood boasts premium quality, and strength. Depending on machinery, tropical plywood can be made with high accuracy in thickness, and is a highly preferable choice in America, Japan, Middle East, Korea, and other regions around the world.
Common plywood
Concrete panel
Floor base
Structure panel
Container flooring
Lamin board
Laminated Veneer Lumber (LVL)
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