Adapt-A-Pole have breathed new life & brought new technology to a proven product which was first invented in the early 1980’s & can proudly boast that approximately 90% of all Rebutted poles completed from the early to mid 1980’s are still in service, & still serviceable today, that’s 33 years & counting
Adapt-A-Pole will provide a minimum 25 year serviceable guarantee on each pole Rebutted with our Patented System.
Each pole will be thoroughly inspected at the new base, then also nondestructively tested at the base & over the length of the Pole.
Asset Improvement & Reinstatement
It should be noted that Rebutting is an ENA approved full pole reinstatement System, and it provides a very different result to Staking which is considered by many to simply be pole reinforcement, that leaves the already degraded butt in the ground.
Once in place the durable steel and concrete base is virtually maintenance free, as is the new base of the pole which is now sitting on the concrete within the tube and has been totally removed from the ground which;
- Reduces moisture levels
- Reduces the possibility of ignition of poles in grass fires
- Virtual eliminates subterranean termite attack
- Totally eliminates Fungal Activity
Traditional, plantation, softwood & recycled timber can also be used in conjunction with a steel & concrete tube to increase both pole height & strength.
Pole Embedment’s are also usually increase during the Rebutting process, & Pole Setting Foam added as required.
Once rebutted, pole strength & subsequent pole life is usually stronger than the original, making this a true reinstatement process. In most cases the kN rating of the pole is also increased due to its shorter lever arm.
The steel sections come in a variety of wall thicknesses and MPa ratings and are individually manufactured to suit strength requirements of each job.
AS/NZS 2878:2000 Timber – Classification into Strength Groups
|Bending Strength MPa||103||150||86||130|
|Modulus of Elasticity MPa||16,300||21,500||14,200||18,500|
Rebutted and composite poles are stronger than traditional installations & one of the reasons is because of the disassociation of timber from the soil, The timber portion of Rebutted and Composite poles can be classified as fully seasoned or air-dried timber rather than saturated or green timber. Air-dried timbers have mean moisture content of around 12%; this figure is consistent with moisture readings taken from rebutted poles. The power industry currently calculates timber pole strength using a Green or Fully Saturated standard. Using the industry accepted reference “The Mechanical Properties of 174 Australian Timbers” by E Bolza and N.H.K. Loot Division of Forestry Products, Technological Paper No 25 C.S.I.R.O. 1963. It clearly demonstrates that in the majority of cases Air- Dried timber is well over 50% stronger than Green timber (Static Bending Modulus of Rupture).
As examples Air Dried Stringybark-Messmate is 66% stronger than the equivalent timber when green or fully saturated and Radiata Pine is 92% stronger. Due to the increase in pole strength gained by rebutting, this can make the process an ideal option when considering thermal upgrades.
Again, due to reduced moisture levels within the lower section of the pole damaging fungal activity cannot normally be sustained either.
Further increases in the kNm rating of Rebutted and Composite poles are achieved by effectively reducing the length of the timbers lever arm. The strength of the steel sleeves are well in excess of what the industry normally require; however if greater strength is required a heavier walled tube can be used. Rebutted poles have no bolts inserted through them, which may weaken the pole and provide an avenue for moisture ingress and possible fungal attack.
Barrier to Subterranean nasties
Generally speaking, Rebutted and Composite poles have the timber-concrete interface 600mm or more above ground, this has some major advantages. One, within the Australian Standard (AS 3660 part 1) steel and concrete are recognised barriers against subterranean termites. In the field Rebutted poles have proved to be an effective deterrent against subterranean termite attack. Secondly, with no timber at ground-line a grass fire will not normally ignite a Rebutted pole.
Rebutting eliminates all ground-line degradation by inserting the pole into a steel and concrete butt of superior strength and durability. In doing so, this shortens the timbers lever arm and modifies the timber from a Green standard to Air Dried. The overall result is an installation that will exceed the current safety and strength standards and have a probable life expectancy greater than the original pole, for around 70% less than the cost of a new installation.