Engineered bamboo

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Engineered bamboo is a low cost product manufactured from bamboo. It is designed to be a replacement for wood[1] or engineered wood, but is used only when high load bearing strength is not required[2] because building standards for this type of use have not been agreed by regulatory bodies.[3] Engineered bamboo comes in several different forms, including lamboo, which has three times the structural capacity as normal timber[4] and is defined and regulated by the ASTM International Standards.[5]

Engineered bamboo has been used as paneling, vehicle beds, concrete formworks,[2] lightweight building construction[6] and even for shelters after the 2004 tsunami.[7] In comparison to the woods that have been traditionally used a number of benefits and drawbacks have been identified. Lower cost, especially when replacing wood that would otherwise have been imported, is a key advantage.[8] Further benefits include greater hardness and shape retention, especially in high temperatures.[9]

However, bamboo is not as resilient as most woods and will decay more rapidly than other woods if not treated with preservatives.[10]

New building methods have had to be developed for engineered bamboo as its properties are sufficiently different, and make normal wood-working methods used with (non-engineered) bamboo unsuitable.[11]

In order to overcome the typical loss of strength bamboo incurs when bending takes place post-harvest, an alternative method to overcome this has been developed.

Pre-harvest bending of the bamboo stems in zig-zags, allows the bamboo to later form a Warren truss.[12]

Alexander Vittouris has proposed a much simpler 2D S-bend shape, which — after harvesting, and in sufficient quantities — could be assembled into a variety of 3D shapes. The arboriculture technique used to make both shapes is similar to tree shaping, and result in parts similar to knee (construction).[13][14][15][16]

References[edit]

  1. ^ Yan Xiao, Masafumi Inoue, Shyam K. Paudel (2008). Modern bamboo structures: proceedings of First International Conference on Modern Bamboo Structures. CRC Press. ISBN 041547597X. 
  2. ^ a b Wan Tarmeze Wan Ariffin (March 2005). "Numerical Analysis of Bamboo and Laminated Bamboo Strip Lumber (PhD paper)". University of Birmingham. Retrieved 2012-04-03. 
  3. ^ "Sustainable building: Building Codes". International Network for Bamboo and Rattan. Retrieved 2012-04-03. 
  4. ^ Wu Xing (March 31, 2010). "My Boo (Lamboo)". Architerials. Retrieved May 28, 2013. 
  5. ^ "Lamboo Inc. Recognized Within ASTM International Standards". Woodworking Network. August 16, 2012. Retrieved July 23, 2013. 
  6. ^ Jorge A. Gutiérrez (2000). Structural Adequacy of Traditional Bamboo Housing in Latin America. National Laboratory for Materials and Structural Models, Civil Engineering Department,University of Costa Rica. ISBN 8186247440. 
  7. ^ Subir Bhaumik (18 December 2005). "Andaman tsunami victims still homeless". BBC. Retrieved 2012-04-03. 
  8. ^ Merlyn Carmelita N. Rivera. Silvicultural management of bamboo in the Philippines and Australia for shoots and timber. Australian Centre for International Agricultural Research. p. 11. 
  9. ^ Bansal, Arun K. and Zoolagud, S.S. (2002). "Bamboo composites: Material of the future". Journal of Bamboo and Rattan 1 (2): 119–130. 
  10. ^ W Liese (2004). "Preservation of bamboo structures". Ghana Journal of Forestry 15: 156. 
  11. ^ Bhavna Sharma, Kent A. Harries and Khosrow Ghavami. "Work in Progress – Pushover Test of Bamboo Portal Frame Structure". University of Pittsburgh. 
  12. ^ Cassandra Adams. "Bamboo Architecture and Construction with Oscar Hidalgo".
  13. ^ Alexander Vittouris and Mark Richardson. "Designing for Velomobile Diversity: Alternative opportunities for sustainable personal mobility". "Section 4.4: Structural pre-harvest deformation of bamboo". 2012.
  14. ^ Kimberley Mok. "Ajiro Bamboo Velobike: A "Grown Vehicle" That's Farmed, Not Factory-Made". 2011.
  15. ^ Brit Liggett. "The Ajiro Bamboo Bike is Grown From the Ground Up". 2011.
  16. ^ Stephen Cauchi. "Bamboozled? Give it a grow" 2011.