Poles are designed to different ultimate loads, depending on the strength class required. External loads i.e. winds, line tension, conductor type and installation conditions determine a pole's working load. A factor of safety is then added to the working load to determine the ultimate (design) load.

Testing takes place on a test bed where the design tip load is applied, simulating working conditions. Working loads should never exceed design loads.

Pole design is based on the OHS Act, which stipulates minimum requirements. If it is suspected that a load may exceed the requirement, the structure/span lengths needs to be redesigned. Broken conductors are not taken into account in the design.

All poles are designed for a maximum wind load of 700Pa. When facing downline a pole can only draw 25% of its transverse strength. This downline loading has been found to be sufficient to resist minor accidental loads incurred during handling and installation.