Trailer Grade Parking Performance Test Procedure
This SAE Recommended Practice establishes methods to determine grade parking performance with respect to:
a. Ability of the parking brake system to lock the braked wheels;
b. The trailer holding or sliding on the grade, fully loaded or unloaded;
c. Applied manual effort;
d. Unburnished or burnished brake lining friction conditions; and
e. Down and up grade directions.
This document establishes a uniform procedure for determining the parking performance on a grade of any new trailer with manufacturer's maximum weight rating of more than 4500 kg (10 000 lb) intended for roadway use.