New Hampshire Code of Administrative Rules
Saf - Department of Safety
Subtitle Saf-C - Commissioner, Department of Safety
Chapter Saf-C 3200 - OFFICIAL MOTOR VEHICLE INSPECTION REQUIREMENTS
Part Saf-C 3226 - TRUCKS AND BUSES
Section Saf-C 3226.26 - Brake Lining, Pad Wear and Service Brake Systems

(1) Bonded linings are less than 2/32 inch at their thinnest point for vehicles with a gross vehicle weight rating of 10,000 pounds or less, or less than 4/32 inch for vehicles with a gross vehicle weight rating in excess of 10,000 pounds up to 26,000 pounds and less than 6/32 inch for vehicles with a gross vehicle weight rating of 26,001 and above;

(2) Riveted linings are less than 2/32 inch above any rivet head at the thinnest point for vehicles with a gross vehicle weight rating of 10,000 pounds or less, or less than 4/32 inch for vehicles with a gross vehicle weight rating in excess of 10,000 pounds up to 26,000 pounds, and less than 6/32 inch for vehicles with a gross vehicle weight rating of 26,001 and above; or

(3) The wire in wire-backed linings is visible on the friction surface.

(1) Mismatched on any axle, or

(2) Air chamber mounting devices are loose, broken, cracked or missing.