How far should the apparatus come to a complete stop during a parking brake test?

During a parking brake test, the apparatus must come to a complete stop within 20 feet to ensure that the braking system is functioning properly and can safely hold the vehicle in place when parked. This distance is established based on standard safety protocols that mandate sufficient stopping distance to account for various conditions that may be encountered when operating a fire apparatus. A distance of 20 feet allows for a significant margin of error, ensuring that the apparatus does not roll or move unintentionally once parked, which is crucial for maintaining safety for firefighters and the public alike.

The other distances would not provide the necessary assurance of effective braking performance. Thus, the specification of 20 feet is indicative of industry standards for safe operational practices, demonstrating thorough preparation for emergency situations.