New Hampshire Code of Administrative Rules
Saf - Department of Safety
Subtitle Saf-C - Commissioner, Department of Safety
Chapter Saf-C 1300 - SCHOOL BUS TRANSPORTATION
Part Saf-C 1308 - SCHOOL BUS TYPE BODY AND CHASSIS DESIGN
Section Saf-C 1308.28 - Step Treads

(a) All steps, including the floor line platform, shall have rubber floor covering or a covering equivalent in wear resistance and abrasion resistance to top grade rubber.

(b) Each step shall be constructed with cold roll steel of a minimum 24 gauge and ribbed rubber shall be permanently bonded. The ribbed rubber shall have a grooved design that runs at a 90 degree angle to the long dimension of the step tread.

(c) The rubber portion of each step tread shall be flexible so that it can be bent around a 1/2 inch mandrel at temperature extremes without breaking or cracking.