Operational Policy 14/15 - Dual Tires Guidance

Training Committee Action Item (393.75) This action item requests the training committee to create a training document to teach inspectors how to properly/uniformly enforce and document 393.75 (g) and 393.75 (h) when inspecting a vehicle with dual tires. To also explain to inspectors why the tire has a different rating for a single tire by itself and when the same tire is sitting beside another tire making it a dual tire.

I have traveled across the country trying to get more awareness for the importance of enforcing 393.75 (g) and (h). I have heard many opinions as to the proper way to enforce and document these violations. I have heard these opinions from instructors as well as enforcement personnel. Below is a list of a few of the most expressed opinions. Examples of different opinions 1. Add the 2 tire ratings together and divide that number by 2. If the rating for one tire is 5,400lbs and the rating for the second tire is 6,005 they would add those 2 numbers together for the weight of 11,405. Divide 11,405 by 2 and if either tire is over 5,702.5 then the tire would be in violation. 2. Add the 2 tire ratings together (same example 11,405). Then if the weight of the wheel end is over 11,405 then place both tires out of service. 3. Use the highest of the 2 tire ratings and that is the max the 2 tires get (same example). The wheel end would get 6,005lbs. If the wheel end is higher than 6,005lbs both tires are in violation. 4. Many have said it is not enforceable or a violation at all and it should not be enforced.

Create a training document to ensure consistent enforcement of 393.75