Wind Speed Map

Wind Velocity Selection
2009 AASHTO LTS-5 specification 3-second gust basic wind speeds (mph) with gust effect factor (G) of 1.14 and 25 year design life wind map (ASCE 7-05) is shown above. This wind map should be used to determine wind velocity for your specific location. If you are located between two different velocity isotach lines, the higher velocity should be used.

Hapco has learned from years of experience that there are local isolated high wind conditions that can be devastating to poles and luminaires not designed for such conditions. Additionally, constant winds in the 10-25 mph range can severely damage certain poles and luminaires by vibration.

Vibration is a local, site specific condition that should not be overlooked when selecting a pole. Destructive vibration is NOT an indication of substandard material, workmanship, or pole design. Please advise Hapco of any unusual wind conditions prior to purchase of poles. More robust poles and/or vibration dampers may be necessary to avoid wind damage.

Pole failures as a result of wind induced vibration are NOT covered under manufacturer’s warranty. Please reference “LIFETIME WARRANTY” and “WIND-INDUCED VIBRATION” for Hapco’s policy regarding vibration.

For Larger Wind Speed Map – Click Here.