none

ASSESSING SOFT ROT IN UTILITY POLES

05-04-2019
by 
in 

There are various kinds of wood decay, but soft rot is the most dangerous, since it often goes undetected by conventional testing methods. The wood looks strong and healthy, but in fact it has lost its strength. Poles in this condition can break at 1 to 1.5kN in a bending test (applied at the top). It does not take much imagination to appreciate what can happen if a worker makes a sudden movement while working at the top of a pole.

The Pilodyn wood density meter tester, made in Japan and available in Australia and New Zealand from Hylec Controls, was developed to determine the density and strength of living and dead wood. Invisible soft rot can be detected rapidly and objectively in an easy, non-destructive way, and the associated reduction in strength can be determined. This can be of vital importance in the case of utility poles and playground equipment.

The test consists of injecting a spring-loaded steel striker pin into the wood. A scale on the instrument gives the depth of penetration. If this exceeds a certain figure, it is unsafe for a worker to climb the pole without special precautions.

The heaviest decay is usually found 50-100mm below ground level, so that is the best place to test. The soil around the base of the pole is removed until there is room to work unhindered with the Pilodyn at an angle. The softest area is located by means of a sharp tool, and three shots made at points around the same circumference. The final result is the average of those three measurements.

Testing is only possible where the rotting has taken place from the outside inwards, and only when the pole is neither frozen nor extremely dry.

Hylec Controls
02 9645 4777
www.hyleccontrols.com.au

Related news & editorials

  1. Dematic distribution centre, landmark automation
    27.01.2021
    27.01.2021
    by      In
    A new automated distribution centre by Dematic will allow consolidation of its multinational logistics activities among its five existing manual distribution sites.
    The automation designed by Dematic allows its supply chain network to operate with enhanced efficiency and productivity.
    A distinctive... Read More
  2. Serpent and dove magnetic welding angle WSP0150R
    27.01.2021
    27.01.2021
    by      In
    As long ago as the 1950’s and 60’s, switchable permanent magnets were produced and used as clamps and magnetic chucks.
    With the discovery and development of rare earth magnet materials in the 1980’s onward, greater strengths from smaller volumes of magnetising material became possible.
    As materials... Read More
  3. ICP-DAS iWSN 1110 sensing module
    27.01.2021
    27.01.2021
    by      In
    ICP Australia is proud to introduce ICP DAS iWSN-1110X iWSN Current Sensing Module with 1-ch CT Input and 1 Expansion Interface.
     The iWSN series sensing module is a self-powered module for AC, digital input, and temperature measurement.
     It can harvest the demand for electricity from the CT... Read More
  4. Adlink PXI Express chassis with thunderbolt interface
    25.01.2021
    25.01.2021
    by      In
    A new generation PXES-2314T test and measurement platform eliminates need to trade-of cost, convenience or performance.
     The PXES-2314T is a compact test and measurement platform that offers the performance and flexibility of PXI Express but in a portable system, requiring only the small PXES-2314T... Read More