We have designed the brackets and banners to cope with wind speeds from 20mph to 75mph. The system actually reduces wind loading on the lamp columns and the arms holding the banners are spring-loaded and they move towards each other as the wind increases, allowing the banner to flex accordingly. This means that in the majority of cases the system will perform very effectively and your banners will remain intact. Occasionally wind speeds reach such speeds that this may cause some damage. However, our maintenance team will be ready for such incidents and will repair or replace any damaged elements quickly.