Deck (building)

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A deck in the backyard of a suburban house.

Kuwait Towers' observation deck.

A high level corridor deck in the backyard of a suburban house, in Australia

A high level deck in the backyard of a suburban house, in Australia. The decking is a Malasian Timber, Selangan Batu

In architecture, a deck is a flat surface capable of supporting weight, similar to a floor, but typically constructed outdoors, often elevated from the ground, and usually connected to a building. The term is a generalization of decks as found on ships.

Wood or timber "decking" can be used in a number of ways - as part of garden landscaping, to extend living areas of houses, and as an alternative to stone based features such as patios. Decks are made from treated lumber, composite material, Aluminum, Western red cedar, teak, mahogany, ipê and other hardwoods and recycled planks made from high-density polyethylene (HDPE), polystyrene (PS) and PET plastic as well as mixed plastics and wood fiber (often called "composite" lumber).

Historically, the softwoods used for decking were logged from old growth forests. These include Atlantic white cedar, redwood and Western red cedar (redcedar). Atlantic City built the first coastal boardwalk in the United States, originally constructed of Atlantic white cedar. However, it wasn't long before the commercial logging of this tree and clearing of cedar swamps in New Jersey caused a decline in the availability of decking. Atlantic City and New York City both switched to Western red cedar. By the 1960s, Western red cedar from the US was declining due to over-logging. More expensive Western red cedar was available from western Canada (British Columbia) but by then, pressure treated pine had become available.

But even with chemical treatments (such as chromated copper arsenate or CCA), pine decking is not as durable as cedars in an outdoor environment. Thus, many municipalities and homeowners are turning to hardwoods.

Generally, hardwoods used for decking come from tropical forests. Much of the logging taking place to produce these woods, especially teak, mahogany and ipê, is occurring illegally, as outlined in numerous reports by environmental organizations such as Greenpeace, Friends of the Earth and Rainforest Relief. US tropical wood imports are rising, partly due to the demand for decking.

The deck of a house is generally a wooden platform built above the ground and connected to the main building. It is generally enclosed by a railing for safety. Access may be from the house through doors and from the ground via a stairway. Residential decks can be constructed over steep areas or rough ground that is otherwise unusable. Decks can also be covered by a canopy or pergola to control sunlight.

Larger buildings may also have decks on the upper floors of the building which may be open to the public as observation decks.

A deck is also the surface used to construct a boardwalk over sand on barrier islands.

[edit] References

Keating, T., 1997. Teak is Torture: Forced Labor Logging in Burma, Rainforest Relief, New York.
Keating, T., 1998. Deep Impact: An Estimate of Tropical Rainforest Acres Impacted for a Board Foot of Imported Ipê, Rainforest Relief, New York.
Monbiot, G., 1992. Mahogany is Murder: Mahogany Extraction from Indian Reserves in Brazil, Friends of the Earth, London.