This SAE Recommended Practice presents requirements for the structural integrity of the brake system of all new trucks, buses, and combination of vehicles designed for roadway use and falling into the following classifications: Truck and Bus: Over 4500 kg (10 000 lb) GVWR; Combination Vehicles: Towing vehicle over 4500 kg (10 000 lb) GVWR. The requirements are based on data obtained from SAE J294. The purpose of this document is to establish the minimum service brake system requirements with regard to structural integrity.