Page 110 - McWane Poles Sales Manual 2024

110
McWane Poles, A Division of McWane Inc.
TECHNICAL NOTES
Pole Inspection
Ductile Iron is a very corrosion resistant material. However, it is a good practice to visually inspect the
poles periodically for potential damage or corrosion due to external factors. Above ground, pole surface
oxidation is expected and is not a structural concern unless there is significant corrosion or pitting.
The following is a recommendation for pole inspection:
1. Visually inspect poles at ground line to insure there is no excessive corrosion or ground line protection
damage every 10 years.
2. If excessive corrosion is suspected, the area in question should be measured for material thickness
with a non-destructive measurement device, such as an ultrasonic device, or by drilling a hole and
measuring the iron cross-section.
The chart below lists the current McWane Poles design material thicknesses by class. The pole design
version is dated 7-9-2014 and applies to all poles manufactured after that date. Depending where the
material measurement is taken on the pole, a lesser wall thickness may be allowed.
Pole Class Wall Thickness Pole Class Wall Thickness
Class 3 .19” Class H5 Varies. See PLS
Class 2 .23” Class H6 Varies. See PLS
Class 1 - 8.7” Tip .19” Class H7 Varies. See PLS
Class 1 - 6” Tip .29” Class H8 Varies. See PLS
Class H1 .23” Class H9 Varies. See PLS
Class H2 .29” Class H10 Varies. See PLS
Class H3 .33” 12.8 kip Varies. See PLS
Class H4 .29” 16 kip Varies. See PLS
20 kip Varies. See PLS
If non-destructive testing is performed, the measurement equipment should be calibrated for ductile
iron. If an inspection is performed and thickness readings are less than the values above, a McWane Poles
representative should be consulted for pole design and measurement verification.