Marine plywood

Marine plywood

In construction, marine plywood is a specially treated plywood that is designed to resist rotting in a high-moisture environment. Marine plywood is frequently used in the construction of docks and boats.

Advantages of marine plywood

* Durability - small scratches through painted plywood may expose the interior to water. Inexpensive plywood may not last long when it is damp
* Strength - marine plywood is stronger and has consistent mechanical properties: no voids.
* Workability - marine plywood is usually easier than fiberglass to cut and bend
* Resistance to Warping - marine plywood (with the exception of Fir-based plywoods) will resist warping or check

Disadvantages of marine plywood

* Cost - Marine plywood is much more expensive than standard plywood. Costs 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. This is about three times as expensive as standard plywood.

Marine plywood comes in several common thicknesses:
* 1/8 inch (3 mm)
* 1/4 inch (6 mm)
* 3/8 inch (9 mm)
* 1/2 inch (12 mm)
* 5/8 inch (15 mm)
* 3/4 inch (18 mm)
* 1 inch (25 mm)

Standards and ratings

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

Alternatives to marine plywood

There are several alternatives to marine plywood. Some of these are engineered materials. Examples include fiberglass-type composites using glass, Kevlar, or graphite fiber, and bonded materials using lightweight cores such as expanded polystyrene or honeycomb.

References

PS1-95, Construction and Industrial Plywood, Plywood Design Specification, Engineered Wood Construction Guide, American Plywood Association [http://www.apawood.org]


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Plywood — Softwood plywood made from spruce Plywood is a type of manufactured timber made from thin sheets of wood veneer. It is one of the most widely used wood products. It is flexible, inexpensive, workable, re usable, and can usually be locally… …   Wikipedia

  • wood — wood1 woodless, adj. /wood/, n. 1. the hard, fibrous substance composing most of the stem and branches of a tree or shrub, and lying beneath the bark; the xylem. 2. the trunks or main stems of trees as suitable for architectural and other… …   Universalium

  • Wood — /wood/, n. 1. Grant, 1892 1942, U.S. painter. 2. Leonard, 1860 1927, U.S. military doctor and political administrator. * * * I Hard, fibrous material formed by the accumulation of secondary xylem produced by the vascular cambium. It is the… …   Universalium

  • Denys Rayner — in 1943 Denys Arthur Rayner DSC Bar, VRD, RNVR (9 February 1908 4 January 1967) fought throughout the Battle of the Atlantic. After intensive war service at sea, Rayner became a writer, a farmer, and a successful designer and builder of small… …   Wikipedia

  • BS 1088 — In materials, the BS 1088 specification is a marine plywood specification that applies to plywood produced with untreated tropical hardwood veneers that have a set level of resistance to fungal attack. The plies are bonded with WBP glue. Although …   Wikipedia

  • Sea kayak — A sea kayak on Valdes Island, British Columbia, Canada. A sea kayak or touring kayak is a kayak developed for the sport of paddling on open waters of lakes, bays, and the ocean. Sea kayaks are seaworthy small boats with a covered deck and the… …   Wikipedia

  • Thunderbird 26 — The Thunderbird class sailboat was designed in 1958 by Seattle Washington naval architect Ben Seaborn, in response to a request from the Douglas Fir Plywood Association (now APA The Engineered Wood Association) of Tacoma, Washington for design… …   Wikipedia

  • Arthur Piver — (1910 1968) was a World War II pilot, an amateur sailor, printshop owner and legendary boatbuilder who lived in Sausalito on San Francisco Bay and became the father of the modern trimaran. In the late 1950s and 1960s he designed and built a… …   Wikipedia

  • Drascombe — Contents 1 Design principles 2 Flotilla 2.1 Caboteur 2.2 Coas …   Wikipedia

  • Marcos (automobile) — Marcos Engineering Ltd. Type Private Industry Automotive Founded 1959 Founder(s) Jem Marsh Frank Costin …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”