Final answer:
The maximum gross weight on tandem axles is typically 34,000 pounds. This limit helps prevent road damage and ensures safety. Tandem axles support the vehicle, cargo, and equipment weight.
Step-by-step explanation:
The maximum gross weight allowed on tandem axles for commercial vehicles in the United States is typically 34,000 pounds, as per federal bridge laws unless specific state laws indicate otherwise. This weight limit is enforced to prevent damage to roadways and bridges and to ensure safety on the roads.
To relate this to some examples in measurements, 3.5 tons is equal to 7,000 pounds, 7.25 tons equals 14,500 pounds, and 25 tons equals 50,000 pounds. The axles must support the vehicle's weight, its cargo, and any additional equipment.