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Deck (building)

January 01, 1970

For other uses, see Deck.

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 from the deck of a ship. A level architectural deck may be intended for use by people, e.g., what in the UK is usually called a decked patio. "Roof deck" refers to the flat layer of construction materials to which the weather impervious layers are attached to a form a roof. It is known as the "roof deck", and they may be either level (for a "flat" rooftop) or sloped.

A deck in the backyard of a suburban house
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 selangan batu, a Malaysian timber.

Functions and materials edit

Wood or timber decking can be used in a number of ways: as part of garden landscaping, to extend the living area of a house, and as an alternative to stone-based features such as patios. Decks are made from treated lumber, composite lumber, composite material, and aluminum. Lumber may be western red cedar, teak, mahogany, ipê, reclaimed and recycled ulin and other hardwoods. Recycled planks may be high-density polyethylene (HDPE), polystyrene (PS) and PET plastic as well as mixed plastics and wood fiber (often called "composite" lumber). Artificial decking products are often called "wood-plastic composites" (WPC). WPCs have different brands like NewTechWood, Azek, Ecornboard etc.[1]

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 the Atlantic white cedar. Soon, 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. Decks are often built from pressure-treated wood. Pressure-treated wood is long lasting and holds up to wet and icy conditions. Pressure-treating chemicals are known to be toxic.[2] Both softwood and hardwood decks need to be finished after installation using either an oil or varnish to prevent weathering, wear, mould, algae and wood-boring insects.[3]

Due to environmental and durability concerns, composite decking (a mixture of two materials, typically wood pulp and recycled material such as plastic bottles or plastic bags) have appeared on the market. Proponents of composite decking tout it as a much-needed development, as it helps to curb logging of trees for new decks. However, composite decking contains harmful chemicals, cannot be refurbished, and despite claims from decking companies, some composite decking still attracts mold. However, newer more modern composites feature a cap or shell that prevents mold and staining.[4] In multi-story commercial construction, the dominant form of deck (including roof deck) construction is composite steel deck.

Generally, hardwoods used for decking come from tropical forests. Much of the logging of these woods, especially teak, mahogany and ipê, is illegal, as outlined in numerous reports by environmental organizations such as Greenpeace, Friends of the Earth and Rainforest Relief.[5][6][7] US tropical wood imports are rising, partly due to the demand for decking.

Construction edit

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. Deck designs can be found in numerous books, do-it-yourself magazines, and websites, and from the USDA.[8]

Typical construction is either of a post and beam architecture, or a cantilever construction. The post-and-beam construction relies on posts anchored to piers in the ground. Typically, these types of structural decks are engineered and require an experienced construction company that specializes in structural decks. Cantilever decks rely on floor joists that protrude out further than the wall of the house. While this type of construction is common, it raises significant safety issues if the decks are not properly waterproofed and flashed. There have been a growing number of deck failures resulting in death and critical injuries. Another key component of decks are code compliant railings. Railings on decks above 760 mm (30 in) are considered guard rails.[according to whom?] Guard rails have a specific building code requirement for both height and structural strength. Most U.S. commercial building codes require a 1,100 mm (42 in) guardrail on decks, and 910 or 1,070 mm (36 or 42 in) for a residential code depending on the state. Typical railing assemblies must meet structural strength requirements of 9.6 kPa (200 lbf/sq ft). In short, decks are complex load-bearing structures that most often require structural engineering, plans, and permits.

Residential decks may contain spaces for cooking and seating. Cooking areas ideally should be situated near the patio door while out of the way from general foot traffic. Dining spaces will include patio tables. For a typical six-person outdoor patio table building, an area of 3.7 m × 4.9 m (12 ft × 16 ft) is ideal. If deck space is available, homeowners may choose to include for the seating, outdoor couches and benches.

Larger buildings may also have decks on the upper floors of the building which can be open to the public as observation decks or greeneries. A deck is also the surface used to construct a boardwalk over sand on barrier islands.

Laying deck or throwing deck refers to the act of placing and bolting down cold-formed steel beneath roofing and concrete floors. This is usually done by an ironworker, sometimes in conjunction with a cement mason or carpenter. It regarded as one of the most physically demanding jobs in the iron working industry. In the United Kingdom the various bans on smoking in public buildings were expected to lead to an increase in the use of timber decking for outdoor spaces where smokers can gather.[9]

Urban rooftop decks edit

 
Deck on roof of hotel in New York

High-rise commercial and residential buildings with rooftop decks often utilize urban landscaping techniques to create "green spaces" or "sky parks". With this trend in outdoor living increasing, many landscape architecture firms are specialized in the design, construction and maintenance of these spaces. Adjustable hybrid pedestal system allow for a self leveling, single model for all height applications, screw adjustable, and PVC pipe adjustable for elevated roof decks.

See also edit

References edit

  1. ^ "How to Choose the Right Lumber for Your Deck?". 5 Nov 2023.
  2. ^ "Lumber Pressure Treated with Chromated Copper Arsenate". New York State Department of Environmental Conservation. 2013.
  3. ^ "Choosing The Best Decking Oil". Blueprint Joinery. Retrieved 2019-02-08.
  4. ^ Paster, Pablo (2009). "Deck: Wood or Plastic?". Treehugger.
  5. ^ Keating, Tim (1997), Teak is Torture: Forced Labor Logging in Burma (PDF), Rainforest Relief, New York
  6. ^ Keating, Tim (1998), Deep Impact: An Estimate of Tropical Rainforest Acres Impacted for a Board Foot of Imported Ipê (PDF), Rainforest Relief, New York
  7. ^ Monbiot, George (1992), Mahogany is Murder: Mahogany Extraction from Indian Reserves in Brazil, Friends of the Earth, London, ISBN 978-1-85750-160-5
  8. ^ L.O. Anderson, T.B. Heebink, and A.E. Oviatt. (1972)."Construction guides for exposed wood decks. Agriculture handbook no. 432". Washington: USDA, Forest Service.
  9. ^ "Smoking Ban Good News For Decking", Timber Construction, 2007

External links edit

  •   Media related to Decks (architecture) at Wikimedia Commons

January 01, 1970
deck, building, other, uses, deck, architecture, deck, flat, surface, capable, supporting, weight, similar, floor, typically, constructed, outdoors, often, elevated, from, ground, usually, connected, building, term, generalization, from, deck, ship, level, arc. For other uses see Deck 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 from the deck of a ship A level architectural deck may be intended for use by people e g what in the UK is usually called a decked patio Roof deck refers to the flat layer of construction materials to which the weather impervious layers are attached to a form a roof It is known as the roof deck and they may be either level for a flat rooftop or sloped A deck in the backyard of a suburban house 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 selangan batu a Malaysian timber Contents 1 Functions and materials 2 Construction 2 1 Urban rooftop decks 3 See also 4 References 5 External linksFunctions and materials editWood or timber decking can be used in a number of ways as part of garden landscaping to extend the living area of a house and as an alternative to stone based features such as patios Decks are made from treated lumber composite lumber composite material and aluminum Lumber may be western red cedar teak mahogany ipe reclaimed and recycled ulin and other hardwoods Recycled planks may be high density polyethylene HDPE polystyrene PS and PET plastic as well as mixed plastics and wood fiber often called composite lumber Artificial decking products are often called wood plastic composites WPC WPCs have different brands like NewTechWood Azek Ecornboard etc 1 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 the Atlantic white cedar Soon 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 Decks are often built from pressure treated wood Pressure treated wood is long lasting and holds up to wet and icy conditions Pressure treating chemicals are known to be toxic 2 Both softwood and hardwood decks need to be finished after installation using either an oil or varnish to prevent weathering wear mould algae and wood boring insects 3 Due to environmental and durability concerns composite decking a mixture of two materials typically wood pulp and recycled material such as plastic bottles or plastic bags have appeared on the market Proponents of composite decking tout it as a much needed development as it helps to curb logging of trees for new decks However composite decking contains harmful chemicals cannot be refurbished and despite claims from decking companies some composite decking still attracts mold However newer more modern composites feature a cap or shell that prevents mold and staining 4 In multi story commercial construction the dominant form of deck including roof deck construction is composite steel deck Generally hardwoods used for decking come from tropical forests Much of the logging of these woods especially teak mahogany and ipe is illegal as outlined in numerous reports by environmental organizations such as Greenpeace Friends of the Earth and Rainforest Relief 5 6 7 US tropical wood imports are rising partly due to the demand for decking Construction editThe 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 Deck designs can be found in numerous books do it yourself magazines and websites and from the USDA 8 Typical construction is either of a post and beam architecture or a cantilever construction The post and beam construction relies on posts anchored to piers in the ground Typically these types of structural decks are engineered and require an experienced construction company that specializes in structural decks Cantilever decks rely on floor joists that protrude out further than the wall of the house While this type of construction is common it raises significant safety issues if the decks are not properly waterproofed and flashed There have been a growing number of deck failures resulting in death and critical injuries Another key component of decks are code compliant railings Railings on decks above 760 mm 30 in are considered guard rails according to whom Guard rails have a specific building code requirement for both height and structural strength Most U S commercial building codes require a 1 100 mm 42 in guardrail on decks and 910 or 1 070 mm 36 or 42 in for a residential code depending on the state Typical railing assemblies must meet structural strength requirements of 9 6 kPa 200 lbf sq ft In short decks are complex load bearing structures that most often require structural engineering plans and permits Residential decks may contain spaces for cooking and seating Cooking areas ideally should be situated near the patio door while out of the way from general foot traffic Dining spaces will include patio tables For a typical six person outdoor patio table building an area of 3 7 m 4 9 m 12 ft 16 ft is ideal If deck space is available homeowners may choose to include for the seating outdoor couches and benches Larger buildings may also have decks on the upper floors of the building which can be open to the public as observation decks or greeneries A deck is also the surface used to construct a boardwalk over sand on barrier islands Laying deck or throwing deck refers to the act of placing and bolting down cold formed steel beneath roofing and concrete floors This is usually done by an ironworker sometimes in conjunction with a cement mason or carpenter It regarded as one of the most physically demanding jobs in the iron working industry In the United Kingdom the various bans on smoking in public buildings were expected to lead to an increase in the use of timber decking for outdoor spaces where smokers can gather 9 Urban rooftop decks edit nbsp Deck on roof of hotel in New York High rise commercial and residential buildings with rooftop decks often utilize urban landscaping techniques to create green spaces or sky parks With this trend in outdoor living increasing many landscape architecture firms are specialized in the design construction and maintenance of these spaces Adjustable hybrid pedestal system allow for a self leveling single model for all height applications screw adjustable and PVC pipe adjustable for elevated roof decks See also editBalcony Deck bridge Observation deck Porch Skyrise greenery Terrace building VerandahReferences edit How to Choose the Right Lumber for Your Deck 5 Nov 2023 Lumber Pressure Treated with Chromated Copper Arsenate New York State Department of Environmental Conservation 2013 Choosing The Best Decking Oil Blueprint Joinery Retrieved 2019 02 08 Paster Pablo 2009 Deck Wood or Plastic Treehugger Keating Tim 1997 Teak is Torture Forced Labor Logging in Burma PDF Rainforest Relief New York Keating Tim 1998 Deep Impact An Estimate of Tropical Rainforest Acres Impacted for a Board Foot of Imported Ipe PDF Rainforest Relief New York Monbiot George 1992 Mahogany is Murder Mahogany Extraction from Indian Reserves in Brazil Friends of the Earth London ISBN 978 1 85750 160 5 L O Anderson T B Heebink and A E Oviatt 1972 Construction guides for exposed wood decks Agriculture handbook no 432 Washington USDA Forest Service Smoking Ban Good News For Decking Timber Construction 2007External links edit nbsp Media related to Decks architecture at Wikimedia Commons Retrieved from https en wikipedia org w index php title Deck building amp oldid 1223078105, wikipedia, wiki, book, books, library,

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