Evaluation of the strength of shaved steamed Pinus radiata poles

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dc.contributor.author Bryan Walford, G en
dc.contributor.author Chapman, John en
dc.contributor.editor Falshaw, R en
dc.contributor.editor Harwood, C en
dc.contributor.editor Burdon, R en
dc.date.accessioned 2012-03-22T18:57:54Z en
dc.date.issued 2010 en
dc.identifier.citation New Zealand Journal of Forestry Science 40:83-90 2010 en
dc.identifier.issn 0048-0134 en
dc.identifier.uri http://hdl.handle.net/2292/15030 en
dc.description.abstract Bending strength of Pinus radiata (D.Don) poles is critical in a range of structural applications, such as retaining-walls. Pinus radiata poles in a wet, shaved and steamed condition were obtained from five suppliers located across the central North Island of New Zealand. This sample of poles met the stiffness (Modulus of Elasticity) value expected of normaldensity poles according to New Zealand Standard3603, but their characteristic bending and compression stresses were 40% and 39%, respectively, lower than expected. Applying a maximum allowable knot size restriction (measured as the knot diameter ratio) made little difference to the results. Applying a minimum stress-wave velocity (measured using a HM- 200 device) also had little effect on the derived characteristic values until the value was raised to 3.2 km/s, which would eliminate about 20% of the sample. A minimum stress-wave velocity reading of 2.8 km/s is recommended. At this level, some poles from two of the five suppliers would have to be rejected. These results indicate that pole selection based on the basic density of outer-zone wood is less effective than that using stress-wave velocity measured using a HM-200 device. It is recommended that New Zealand Standard3603 should be amended in the light of these findings. en
dc.publisher New Zealand Forest Research Institute Limited, trading as Scion en
dc.relation.ispartofseries New Zealand Journal of Forestry Science en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0048-0134/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Evaluation of the strength of shaved steamed Pinus radiata poles en
dc.type Journal Article en
pubs.begin-page 83 en
pubs.volume 40 en
dc.rights.holder Copyright: New Zealand Forest Research Institute Limited; Scion en
pubs.author-url http://www.scionresearch.com/__data/assets/pdf_file/0003/17931/NZJFS40201083-90_WALFORD.pdf en
pubs.end-page 90 en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 150087 en
pubs.record-created-at-source-date 2012-01-24 en

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