The injection of a refined hydrocarbon oil emulsion in the outer layer of the pole after the treatment with CCA is offered by some pole producers to facilitate gaff penetration. Conductivity is low, as is corrosivity without affecting the bending characteristics of the wood. CCA has many advantages, including clean surface of the poles, ground line treatment that is not required thus eliminating the requirement to rotate the poles during extended storage periods. The author provides a brief historical outline concerning the creation of CCA in 1933 and its subsequent uses. Although new alternative wood preservatives would be used, this decision does not affect utility poles, which will continue to be sold and installed. [Arch Wood Protection Canada, Mississauga, ON (Canada)Ī voluntary decision by industry to move non-industrial use of treated lumber products away from pressure-treated wood containing chromated copper arsenate (CCA) preservative was announced by the Environmental Protection Agency on February 12, 2002. Utility poles not affected by CCA decisionĭe Venzio, H. The capacity of the rehabilitated poles was nearly 93 per cent of the average ultimate capacity of the average ultimate capacity of poles tested during the first phase of the study, and 23 per cent higher than the capacity required by CSA standards. The ultimate capacity of the poles was determined using the CSA standard for wood poles. It also provided a brief overview of current standards for wood utility poles and reinforcing stubs and discussed the experimental program where long, air-dried jack pine poles were tested in order to evaluate the effectiveness of a proposed rehabilitation system consisting of FRP splines and FRP jackets. This article presented results from a research program carried out at the University of Manitoba to develop a repair and rehabilitation technique for wood poles using fibre-reinforced polymers (FRP). New innovative methods are therefore required to restore and maintain the structural integrity of existing wood poles, especially in light of the increasing cost of quality wood for use in poles as well as a result of environmental concerns regarding pole disposal and chemical treatment of existing poles.
However, all poles will attain a point when they are no longer suitable for their intended use.
An effective preservative treatment and maintenance program can effectively extend the service life of the wood pole. The service life of a wood utility pole depends on several factors, such as decay, mechanical damage, weathering, and changing design requirements. In order to ensure safe and reliable service, all wood utility poles need an effective maintenance program. Repair and rehabilitation of wood utility poles with fibre-reinforced polymersĮnergy Technology Data Exchange (ETDEWEB) Images approaching this quality have also been produced on living trees using semiportable systems by other researchers Detailed images have been produced showing the ring structure of the wood and voids due to rot or decay. CAT can accurately image a wooden utility pole (since the size, density, and atomic elements of a pole are similar to the human head to torso), as was confirmed by imaging poles using the UMC nuclear engineering EMI-1010 medical scanner. Since the cost of replacing a pole ranges from hundreds to thousands of dollars, an accurate, nondestructive method is needed. The accuracy in identifying poles needing replacement using these techniques is ∼ 70%. Wooden utility poles are prone to rot and decay at ground level current techniques to assess this loss of strength are relatively primitive, i.e., tapping the pole (hitting the pole with a hammer) or boring into the pole for samples and then testing inside the bore hole with an electrical pulse device. CAT is a well-established medical technology that has recently been applied to a number of industrial applications.
ARCP 2000 CRACKER PORTABLE
Work is under way at the University of Missouri, Columbia (UMC) to design, build, and test a portable computerized axial tomography (CAT) device for the nondestructive, field imaging of wooden utility poles. International Nuclear Information System (INIS) Design of a portable CAT scanner for utility pole inspection
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