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Proof-Test Methods

The Four-Point Proof Test Method

To prove timber poles meet ISO 15206:2010 for classification as a high or normal density pole.

  • The minimum pole length is 4.5m
  • The maximum pole length is 18.0m
  • The max SED/diameter is 550mm

The Three-Point Proof Test Method

To prove timber poles meet NZS 3605:2001 and/or ISO 15206:2010 for classification as a high or normal density pole.

  • The minimum pole length is 3.0m
  • The maximum pole length is 18.0m
  • The max SED/diameter is 550mm

The Three-Point Ground Line Proof Test Method

Is used to apply a proof load at the Ground Line to test the pole to high or normal density specification and also calculate the Ultimate Top Load (e.g TTT Utility Poles) according to NZS 3605:2001. The customer supplies the Ground Line (m) as measured from the LED end of the pole or the Ultimate Top Load (kN) that needs to be achieved.

  • The minimum pole length is 3.0m
  • The maximum pole length is 18.0m
  • The max SED/diameter is 550mm

Pole Testing

When placed, the pole is orientated with its axis horizontal on the Pole Tester. One or two hydraulic rams (each with a maximum load of 450kN) are used to apply vertical loads to the pole. The rams can be moved into different positions and their shape has been designed to minimise damage to the pole. The load is applied to the pole at a rate sufficient to reach the required load to an accuracy of 2% in not less than three seconds and not more than 30 seconds. The load applied by the hydraulic ram(s) is held at the proof load level for 15 seconds.

Each pole that successfully passes testing is tagged with a numbered tag. For TTT Utility Poles, a numbered aluminium disc is also attached to the pole.


Pole Types

All TTT Poles whether it be SED, Uglies, Utility, UniLog or MultiPoles can be tested.


Pole Gaining

The TTT Pole Tester also has a gaining saw attachment for cutting gains (for example gains on TTT Utility Poles for the cross arms) and/or drilling holes. Gains are made according to customer specification.

Also see TTTested brochure.

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