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Timber pilings

March 08, 2023

Piling foundations support many historic structures such as canneries, wharves, and shore buildings. The old pilings present challenging problems during restoration as they age and are destroyed by organisms and decay. Replacing the foundation entirely is possible but expensive. Regularly inspecting and maintaining timber piles may extend the life of the foundation.

Timber-pile bridge with steel stringers, New Jersey

Historic use and treatment in water

Timber pile construction in the aquatic and marine environment has a long history in Europe dating as far back as the bronze and stone age in Switzerland.[1]

Swiss lake dwellers

During severe droughts in Switzerland in the mid-nineteenth century, lake areas that had been previously inundated with water, were exposed to reveal ancient archaeological remains of various types of timber piling support assemblies that served has foundations for both individual houses and community buildings. The design of these timber assemblies varied by the time of occupation, whether during the bronze or stone age, and also by geological conditions where the timbers rested.[1]

The communities were called the Swiss Lake Dwellers and were located in various fresh water lakes around Zürich and other areas in Switzerland. During the archaeological excavations, many of the piles dissolved after being in contact with air.[1]

Early building piling foundations in Venice, Italy

In Venice, some of the early piling foundations were built on timber piles. The early Venetian constructors used building techniques that included using impermeable stone supported by wooden rafts and timber piles.[2] The timber piles did not rot because they were set into the mud at the bottom of the lagoon which prevented oxygen and harmful microbes from reaching them.[2]

Historic treatment and preservation in marine waters

Treatment methods used prior to 18th century

Over 2,000 years ago, wood builders were aware of marine borers and decay and protected wood using crude extracts and various chemicals.[3] Further study on how to address marine borer activity and decay accelerated in the 18th century.

Treatment methods revived in 18th & 19th centuries

In the 18th and 19th centuries the study of wood preservation was revived due to the deterioration of the timber pile dikes that protected Holland as well as the high level of decay and marine borer activity in English Navy ships.[3] The early dikes in Holland were supported by timber piles.[4]Creosote derived from coal processing, was discovered in the mid-18th century to prevent timber pile decay.[3] The development of Creosote pressure treatment by John Bethel was also an important advancement in timber piling construction.[3] Historic buildings supported by timber piles may either be either treated with creosote or chromated copper arsenate.

Types of wood used

In the United States, Douglas-Fir timber piles are used most often in the Pacific Northwest while Southern Pine are used most commonly on the East Coast. Douglas-Fir is used most commonly used on the west coast due to its high strength, renewability and low cost.[5]

Piling deterioration problems

Marine borers

There are three groups of marine borers in West Coast waters including gribbles, shipworms, and pholads, and each differs in the type of damage it causes.[6]

Gribbles

A Gribble (Limnoria) is a destructive crustacean that burrows into the wood surfaces.[6] Unlike other marine borers, gribbles travel easily from timber to timber using the wood for food and shelter.[6] Gribbles burrow to a shallow depth but can still reduce pile diameter by one inch per year; a gribble infested pile typically has an hour-glass shape at the tide line.[6]

Shipworms

 
Teredolites 012416

Shipworms (Teredolite) are wood-boring bivalves that burrow deeply into submerged wood.[7] Although piles attacked by shipworms may appear sound on the surface, they may be completely riddled with a maze of tunnels.[6] Shipworms can spread to new wood only when they are in the free-swimming larval stage.[8] Once they attack and bore into the wood, they become imprisoned within it.[8] Ancient mariners, realizing that shipworms were imprisoned in the wood of their ships, would sail far up river and remain in fresh water for a number of months to kill the shipworms.[8] Experienced divers look for siphons that project from the wood or use sonic devices to estimate the extent of internal damage.[8] Shipworm and gribble attacks can also be detected by immersing untreated wood panels and destructively sampling them at monthly intervals.[8]

Pholads

Pholads, rock-burrowing clams, burrow into and damage untreated wood in warmer waters near Hawaii and Mexico and along Oregon beaches boring only into the surface of the wood.[8] Ensuring that the shell of the wood is undamaged will keep this Pholad borer at bay.

Insects

Wood above the waterline may be attacked by a number of insects, including termites, carpenter ants, and beetles.[9] One beetle, the wharf borer (Nacedes melanura), can attack untreated or damaged treated hardwoods and conifers with high moisture contents by tunneling extensively and leaving behind dark brown fecal matter that further degrades the wood.[9]

Wood decay

Wood decay describes wood in all stages of fungal attack, from the initial invasion of hyphae into the cell walls to the complete destruction of the wood.[10] Wood-inhabiting fungi are most common on timber piles above the water surface since the lack of oxygen below water inhibits fungal growth.[10]

Methods of detecting decay

Incipient decay may develop in untreated pile tops within 1 year and reach the visible, advanced stage, termed rot, within 2 to 4 years and can extend 4 feet or more from the internally rotting areas of a Douglas-fir pile.[9] A triangular blade scraper, a sharp shovel, or a dull probe are useful when inspecting piles for surface deterioration or marine borer attack because they allow the inspector to estimate the depth of deterioration.[9] Because untreated wood can often be exposed while these tools are being used, a preservative solution or paste should be applied to exposed areas.[9]

Cracks

Cracks that have developed after the wood has been treated are highly susceptible to borers, insects and decay in the right conditions. Cracks need to be evaluated during an initial pile inspection to ascertain depth, location and treatment condition.

Decay treatment options

Liquid preservatives

Apply a liquid preservative to cutoff tops of piles and timbers by flooding them with hot creosote (150 to 200 °F), pentachlorophenol in diesel oil, or copper naphthenate in mineral spirits.[11]

Solid preservatives

A solid preservative, such as Fluor-Chrome-Arsenic-Phenol (FCAP), can be applied dry or as a paste where hawsers rip off caps and expose wood to moisture and decay organisms.[11]

Borer attack treatment options

Creosote, CCA, and ACA

Creosote effectively prevents attack by marine borers in coastal waters north of San Francisco and inorganic salts [Chromated Copper Arsenate (CCA) or Ammoniacal Copper Arsenate (ACA) are recommended south of San Francisco because of the likelihood of attack by the wood borer that is predominantly located in warmer waters.[12]

Barriers and plastic wraps

Impermeable barriers can protect preservative-treated wood piles under the waterline from marine borer attack by inhibiting the entry of borers into the wood and creating anaerobic conditions that kill established borers by limiting the available oxygen.[13]

Wood and concrete reinforcement

A heavily damaged piling structure can be reinforced by cutting out the damaged section and replacing it with preservative-treated wood.[14] Wrapping piles with plastic barriers can provide protection from marine borers for 25 years or more.[14] Pile reinforcement with concrete can be sufficient by filling the void with coarse stone and mortar.[14] Where damage is more severe, forms made of metal, wood, concrete, woven nylon, or pitch-impregnated fiber are attached to the pile as far down as 2 feet below the mudline.[14]

Required maintenance & inspection

Inspection interval

In order to effectively preserve and maintain timber piles, regular inspection is required to detect deteriorating structures before replacement is necessary.[5] Pile inspections should take place every five years.[5]

Inspect pilings removed from service

One of the best ways to ascertain the cause of deterioration as well as what stage the deterioration is in, is to inspect a piling that has been removed from service.[5] The loss of one piling used for inspection might save the remaining timber pilings and members from being replaced. In order to diagnose the problems, cut the timbers into short sections and longitudinally split each section in order to see how far the preservative has penetrated.[5] Reuse of any treated timber pile supplied by an outside source is not recommended. Not knowing the applied treatment, past use, or if diesel fuels have been applied to the surface used to give the appearance of a recent retreatment could decrease the life of the pile. Some unscrupulous suppliers of used timber piles should be avoided, because some contractors have applied diesel fuel to the outside of the piles to bring the embedded creosote to the surface.

See also

Deep foundation

References

  1. ^ a b c Keller, Ferdinand; Lee, John Edward (1866). The Lake Dwellings of Switzerland and Other Parts of Europe. London: London : Longmans, Green, and Co. pp. 1–8, 12–16.
  2. ^ a b Preziuso, Cecelia. "Venice and Its Lagoons". Venice the Future. Retrieved December 5, 2017.
  3. ^ a b c d Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 5.
  4. ^ "Dike History". Dutch Dikes. Retrieved December 5, 2017.
  5. ^ a b c d e Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 4.
  6. ^ a b c d e Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 12.
  7. ^ Hasiotis, Stephen. "KU Ichnology Studying the Traces of Life". KU Ichnology. IBGS Research Group. Retrieved December 5, 2017.
  8. ^ a b c d e f Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 15.
  9. ^ a b c d e Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 19.
  10. ^ a b Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 17.
  11. ^ a b Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 32.
  12. ^ Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 34.
  13. ^ Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 35.
  14. ^ a b c d Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 36.
  • Keller, Ferdinand; Lee, John Edward (December 1, 2017). The Lake Dwellings of Switzerland. London: London: Longmans, Green, and Co. pp. 1–8, 12–16.
  • Morrell, Jeffery, J.; Helsing, Guy G.; Graham, Robert D. (October 1984). "Marine Wood Maintenance Manual: A Guide for Proper Use of Douglas-Fir in Marine Exposures". Forest Research Lab, College of Forestry and Sea Grant Program (48): 4.
  • >Preziuso, Cecelia. "Venice and Its Lagoons". Venice the Future. Retrieved December 5, 2017.
  • >Müller-Beck, Hansjürgen (December 1961). "Prehistoric Swiss Lake Dwellers". Scientific American. 205 (6): 138–149. JSTOR 24937169.
  • "Dike History". Dutch Dikes. Retrieved December 5, 2017.<

Further reading

  • Singh, Ram D. (2013). "Evaluation of Timber Pile Supported Marine Piers". International Conference on Case Histories in Geotechnical Engineering. (3).
  • Tezak, Scott; Low, David; Reeder, Adam (February 2009). FEMA P-762, Local Officials Guide for Coastal Construction. Federal Emergency Management Agency. pp. 6-1–6-24.
  • Reynolds, T N (2003). "Timber Piles and Foundations". BRE Digest. 479: 1–10.
  • Collin, James G. (2002). Timber Pile Design and Construction Manual. American Wood Preservers Institute. pp. 1–145.
  • Crossman, Matt; Simm, Jonathan (2004). Manual on the Use of Timber in River and Coastal Engineering. London: Thomas Telford Publishing. pp. 1–348. ISBN 0 7277 3283 8.

March 08, 2023
timber, pilings, piling, foundations, support, many, historic, structures, such, canneries, wharves, shore, buildings, pilings, present, challenging, problems, during, restoration, they, destroyed, organisms, decay, replacing, foundation, entirely, possible, e. Piling foundations support many historic structures such as canneries wharves and shore buildings The old pilings present challenging problems during restoration as they age and are destroyed by organisms and decay Replacing the foundation entirely is possible but expensive Regularly inspecting and maintaining timber piles may extend the life of the foundation Timber pile bridge with steel stringers New Jersey Contents 1 Historic use and treatment in water 1 1 Swiss lake dwellers 1 2 Early building piling foundations in Venice Italy 2 Historic treatment and preservation in marine waters 2 1 Treatment methods used prior to 18th century 2 2 Treatment methods revived in 18th amp 19th centuries 3 Types of wood used 4 Piling deterioration problems 4 1 Marine borers 4 1 1 Gribbles 4 1 2 Shipworms 4 1 3 Pholads 4 2 Insects 4 3 Wood decay 4 3 1 Methods of detecting decay 4 4 Cracks 5 Decay treatment options 5 1 Liquid preservatives 5 2 Solid preservatives 6 Borer attack treatment options 6 1 Creosote CCA and ACA 6 2 Barriers and plastic wraps 6 3 Wood and concrete reinforcement 7 Required maintenance amp inspection 7 1 Inspection interval 8 Inspect pilings removed from service 9 See also 10 References 11 Further readingHistoric use and treatment in water EditTimber pile construction in the aquatic and marine environment has a long history in Europe dating as far back as the bronze and stone age in Switzerland 1 Swiss lake dwellers Edit During severe droughts in Switzerland in the mid nineteenth century lake areas that had been previously inundated with water were exposed to reveal ancient archaeological remains of various types of timber piling support assemblies that served has foundations for both individual houses and community buildings The design of these timber assemblies varied by the time of occupation whether during the bronze or stone age and also by geological conditions where the timbers rested 1 The communities were called the Swiss Lake Dwellers and were located in various fresh water lakes around Zurich and other areas in Switzerland During the archaeological excavations many of the piles dissolved after being in contact with air 1 Early building piling foundations in Venice Italy Edit In Venice some of the early piling foundations were built on timber piles The early Venetian constructors used building techniques that included using impermeable stone supported by wooden rafts and timber piles 2 The timber piles did not rot because they were set into the mud at the bottom of the lagoon which prevented oxygen and harmful microbes from reaching them 2 Historic treatment and preservation in marine waters EditTreatment methods used prior to 18th century Edit Over 2 000 years ago wood builders were aware of marine borers and decay and protected wood using crude extracts and various chemicals 3 Further study on how to address marine borer activity and decay accelerated in the 18th century Treatment methods revived in 18th amp 19th centuries Edit In the 18th and 19th centuries the study of wood preservation was revived due to the deterioration of the timber pile dikes that protected Holland as well as the high level of decay and marine borer activity in English Navy ships 3 The early dikes in Holland were supported by timber piles 4 Creosote derived from coal processing was discovered in the mid 18th century to prevent timber pile decay 3 The development of Creosote pressure treatment by John Bethel was also an important advancement in timber piling construction 3 Historic buildings supported by timber piles may either be either treated with creosote or chromated copper arsenate Types of wood used EditIn the United States Douglas Fir timber piles are used most often in the Pacific Northwest while Southern Pine are used most commonly on the East Coast Douglas Fir is used most commonly used on the west coast due to its high strength renewability and low cost 5 Piling deterioration problems EditMarine borers Edit There are three groups of marine borers in West Coast waters including gribbles shipworms and pholads and each differs in the type of damage it causes 6 Gribbles Edit A Gribble Limnoria is a destructive crustacean that burrows into the wood surfaces 6 Unlike other marine borers gribbles travel easily from timber to timber using the wood for food and shelter 6 Gribbles burrow to a shallow depth but can still reduce pile diameter by one inch per year a gribble infested pile typically has an hour glass shape at the tide line 6 Shipworms Edit Teredolites 012416 Shipworms Teredolite are wood boring bivalves that burrow deeply into submerged wood 7 Although piles attacked by shipworms may appear sound on the surface they may be completely riddled with a maze of tunnels 6 Shipworms can spread to new wood only when they are in the free swimming larval stage 8 Once they attack and bore into the wood they become imprisoned within it 8 Ancient mariners realizing that shipworms were imprisoned in the wood of their ships would sail far up river and remain in fresh water for a number of months to kill the shipworms 8 Experienced divers look for siphons that project from the wood or use sonic devices to estimate the extent of internal damage 8 Shipworm and gribble attacks can also be detected by immersing untreated wood panels and destructively sampling them at monthly intervals 8 Pholads Edit Pholads rock burrowing clams burrow into and damage untreated wood in warmer waters near Hawaii and Mexico and along Oregon beaches boring only into the surface of the wood 8 Ensuring that the shell of the wood is undamaged will keep this Pholad borer at bay Insects Edit Wood above the waterline may be attacked by a number of insects including termites carpenter ants and beetles 9 One beetle the wharf borer Nacedes melanura can attack untreated or damaged treated hardwoods and conifers with high moisture contents by tunneling extensively and leaving behind dark brown fecal matter that further degrades the wood 9 Wood decay Edit Wood decay describes wood in all stages of fungal attack from the initial invasion of hyphae into the cell walls to the complete destruction of the wood 10 Wood inhabiting fungi are most common on timber piles above the water surface since the lack of oxygen below water inhibits fungal growth 10 Methods of detecting decay Edit Incipient decay may develop in untreated pile tops within 1 year and reach the visible advanced stage termed rot within 2 to 4 years and can extend 4 feet or more from the internally rotting areas of a Douglas fir pile 9 A triangular blade scraper a sharp shovel or a dull probe are useful when inspecting piles for surface deterioration or marine borer attack because they allow the inspector to estimate the depth of deterioration 9 Because untreated wood can often be exposed while these tools are being used a preservative solution or paste should be applied to exposed areas 9 Cracks Edit Cracks that have developed after the wood has been treated are highly susceptible to borers insects and decay in the right conditions Cracks need to be evaluated during an initial pile inspection to ascertain depth location and treatment condition Decay treatment options EditLiquid preservatives Edit Apply a liquid preservative to cutoff tops of piles and timbers by flooding them with hot creosote 150 to 200 F pentachlorophenol in diesel oil or copper naphthenate in mineral spirits 11 Solid preservatives Edit A solid preservative such as Fluor Chrome Arsenic Phenol FCAP can be applied dry or as a paste where hawsers rip off caps and expose wood to moisture and decay organisms 11 Borer attack treatment options EditCreosote CCA and ACA Edit Creosote effectively prevents attack by marine borers in coastal waters north of San Francisco and inorganic salts Chromated Copper Arsenate CCA or Ammoniacal Copper Arsenate ACA are recommended south of San Francisco because of the likelihood of attack by the wood borer that is predominantly located in warmer waters 12 Barriers and plastic wraps Edit Impermeable barriers can protect preservative treated wood piles under the waterline from marine borer attack by inhibiting the entry of borers into the wood and creating anaerobic conditions that kill established borers by limiting the available oxygen 13 Wood and concrete reinforcement Edit A heavily damaged piling structure can be reinforced by cutting out the damaged section and replacing it with preservative treated wood 14 Wrapping piles with plastic barriers can provide protection from marine borers for 25 years or more 14 Pile reinforcement with concrete can be sufficient by filling the void with coarse stone and mortar 14 Where damage is more severe forms made of metal wood concrete woven nylon or pitch impregnated fiber are attached to the pile as far down as 2 feet below the mudline 14 Required maintenance amp inspection EditInspection interval Edit In order to effectively preserve and maintain timber piles regular inspection is required to detect deteriorating structures before replacement is necessary 5 Pile inspections should take place every five years 5 Inspect pilings removed from service EditOne of the best ways to ascertain the cause of deterioration as well as what stage the deterioration is in is to inspect a piling that has been removed from service 5 The loss of one piling used for inspection might save the remaining timber pilings and members from being replaced In order to diagnose the problems cut the timbers into short sections and longitudinally split each section in order to see how far the preservative has penetrated 5 Reuse of any treated timber pile supplied by an outside source is not recommended Not knowing the applied treatment past use or if diesel fuels have been applied to the surface used to give the appearance of a recent retreatment could decrease the life of the pile Some unscrupulous suppliers of used timber piles should be avoided because some contractors have applied diesel fuel to the outside of the piles to bring the embedded creosote to the surface See also EditDeep foundationReferences Edit a b c Keller Ferdinand Lee John Edward 1866 The Lake Dwellings of Switzerland and Other Parts of Europe London London Longmans Green and Co pp 1 8 12 16 a b Preziuso Cecelia Venice and Its Lagoons Venice the Future Retrieved December 5 2017 a b c d Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 5 Dike History Dutch Dikes Retrieved December 5 2017 a b c d e Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 4 a b c d e Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 12 Hasiotis Stephen KU Ichnology Studying the Traces of Life KU Ichnology IBGS Research Group Retrieved December 5 2017 a b c d e f Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 15 a b c d e Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 19 a b Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 17 a b Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 32 Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 34 Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 35 a b c d Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 36 Keller Ferdinand Lee John Edward December 1 2017 The Lake Dwellings of Switzerland London London Longmans Green and Co pp 1 8 12 16 Morrell Jeffery J Helsing Guy G Graham Robert D October 1984 Marine Wood Maintenance Manual A Guide for Proper Use of Douglas Fir in Marine Exposures Forest Research Lab College of Forestry and Sea Grant Program 48 4 gt Preziuso Cecelia Venice and Its Lagoons Venice the Future Retrieved December 5 2017 gt Muller Beck Hansjurgen December 1961 Prehistoric Swiss Lake Dwellers Scientific American 205 6 138 149 JSTOR 24937169 Dike History Dutch Dikes Retrieved December 5 2017 lt Further reading EditSingh Ram D 2013 Evaluation of Timber Pile Supported Marine Piers International Conference on Case Histories in Geotechnical Engineering 3 Tezak Scott Low David Reeder Adam February 2009 FEMA P 762 Local Officials Guide for Coastal Construction Federal Emergency Management Agency pp 6 1 6 24 Reynolds T N 2003 Timber Piles and Foundations BRE Digest 479 1 10 Collin James G 2002 Timber Pile Design and Construction Manual American Wood Preservers Institute pp 1 145 Crossman Matt Simm Jonathan 2004 Manual on the Use of Timber in River and Coastal Engineering London Thomas Telford Publishing pp 1 348 ISBN 0 7277 3283 8 Retrieved from https en wikipedia org w index php title Timber pilings amp oldid 1017543258, wikipedia, wiki, book, books, library,

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