This SAE Recommended Practice establishes minimum performance requirements for trucks, buses, truck-tractors, full trailers, and semitrailers with gross vehicle weight ratings greater than 4540 kg (10 000 lb) with regard to:

a. Vehicle classification

b. Vehicle load

c. Percent grade

d. Application force

Purpose

This document presents on-grade parking performance requirements for new motor vehicles and trailers intended for roadway use.