When washing the exterior of an aerial apparatus, what is the recommended starting point?

Washing the exterior of an aerial apparatus from the top down is considered the best practice for several reasons. Starting at the top allows gravity to assist in the cleaning process; as you wash downward, any dirt, grime, or cleaning solution will flow down, minimizing the chances of re-soiling areas that have already been cleaned. This method is efficient because it ensures that you are not inadvertently pushing dirt back onto surfaces that have already been addressed.

Additionally, washing from the top down helps maintain the integrity of the apparatus. The intricate components and finishes of aerial devices can be sensitive, and starting from the top minimizes the risk of water pooling in areas that could lead to corrosion or other damage. It also ensures thorough cleaning of hard-to-reach areas, as any residual contaminants are washed away rather than trapped in crevices or on parts that have already been cleaned.

In contrast, starting from the bottom up could lead to reintroducing dirt onto areas that are already clean, creating more work. Cleaning from the sides inward might not effectively manage runoff, and alternating sections could result in an inefficient cleaning process. Therefore, beginning at the top is the most practical and effective method for ensuring a thorough and safe wash of an aerial apparatus.