What is the difference between “Standard”, “Dade”, and “Impact” Windloads?

Standard (non-impact) is the lowest tier wind load rating. Standard windload starts at 90MPH wind load rating and goes up to 180MPH

Impact is the mid-tier wind load rating. Impact starts at 130MPH and goes up to 185MPH.

Dade, or Dade County, is the highest tier wind load available. This is a requirement in Dade County, Florida and other areas as well.