OOSC, Part II, Item 11 and 13. Tires and Wheels - Single or Dual Tire Set

This request is being brought forward for simple awareness and to answer a few questions the roadside inspector had during the inspection. The awareness piece is to identify these BEFORE bringing onto a pit for inspection. As you can see in the photos the Inspector did not identify the reduced width of the tires and almost dropped the entire left side of the trailer into our scale inspection pit.

The following conditions apply to all tires; however, when these conditions are found on a dual tire set, both tires must meet one or more of the conditions listed in item 11.b. (8) Bias Ply Tire: When more than one ply is exposed in the tread area and the exposed area of the top ply exceeds 2 square inches (12.9 sq cm) or damaged plies are evident in the sidewall up to 2 square inches (12.9 sq cm). 393.75(a)(1)) (9) Radial Ply Tire: When two or more plies are exposed in the tread area and the exposed area of the top ply exceeds 2 square inches (12.9 sq cm) or damaged cords are evident in the sidewall up to 2 square inches (12.9 sq cm). (393.75(a)(1)) (10) Presence of rubber coated cord or cured rubber plug in the sidewall. (396.3(a)(1)) (11) So worn that less than 1/32 inch (.8 mm) tread remains when measured in any two adjacent major tread grooves (typically any groove containing a tread wear indicator) at three separate locations around the circumference of the tire at least 8 inches (203.2 mm) apart. (393.75(c)) (9) Weight carried exceeds tire load limit. This includes overloaded tire resulting from low air pressure. (Load Limit - 393.75(f) or Inflation Pressure - 393.75(h)) • During the inspection the inspector identified unit 2 axle 1 left side had 2 or more plies exposed in the tread area and the exposed area of the top ply exceeded 2 square inches. Unit 2 axle 2 right side tire had less the 1/32” tread depth when measured on two adjacent major tread grooves at three separate locations around the circumference of the tire at least 8 inches apart. The Inspector viewed it as duals to give the carrier the benefit. GVWR of trailer was 15,000 pounds. It appears that only Econoline Trailers use the Multi-max suspension systems. See youtube video on functionality. https://www.youtube.com/watch?v=KxDMSmQNRYQ

Now for the questions: 1. Are they singles or duals for weight purposes/tire load limit? 2. Are they considered singles or duals as it pertains to the OOSC, defect related? 3. The axle is attached to the leaf spring and on each end there is a brake assembly and a single wheel. Does each “wheel end” need a brake? (393.42)