The max gross weight on the tandem axles is:

The max gross weight on the tandem axles is:

• A. 12,000lbs
• B. 32,000lbs
• C. 80,000lbs
• D. 34,000lbs

Answer: (D)

Weight limits are set for different axle groups to protect roads and bridges. The tandem axle pair—the two axles closely spaced on a trailer—has a combined maximum load of 34,000 pounds. This is specified by the bridge formula and is lower than simply adding the single-axle limit, so the tandem group can’t carry more than 34k even though each axle individually is limited. The overall vehicle can be up to 80,000 pounds gross, but the tandem axles themselves must not exceed 34,000 pounds. If the tandem pair carries more than that, the weight distribution is outside legal limits even if the other axles are within their caps.

Weight limits are set for different axle groups to protect roads and bridges. The tandem axle pair—the two axles closely spaced on a trailer—has a combined maximum load of 34,000 pounds. This is specified by the bridge formula and is lower than simply adding the single-axle limit, so the tandem group can’t carry more than 34k even though each axle individually is limited. The overall vehicle can be up to 80,000 pounds gross, but the tandem axles themselves must not exceed 34,000 pounds. If the tandem pair carries more than that, the weight distribution is outside legal limits even if the other axles are within their caps.