Your numbers are way out, poles usually last between 25 and 70 years generally depending on what they are made from. Hardware (pins, insulators, crossarms) las

Your numbers are way out, poles usually last between 25 and 70 years generally depending on what they are made from. Hardware (pins, insulators, crossarms) last at least 15 years usually, often much longer. There is certainly nothing that needs replacing every 3-5 years.