Examkin

Question

Difficulty: MediumWeight Definitions and Limits (GVWR, GCWR, Axle Weights)

Commercial motor vehicle operators must distinguish between federal highway weight limits and manufacturer equipment ratings. Match each commercial vehicle weight term or regulatory threshold on the left with its corresponding federal limit or technical definition on the right.

  • Federal Single Axle Limit20,000 lbs20,000\text{ lbs} maximum allowable load transmitted to the highway by a single axle system
  • Federal Tandem Axle Limit34,000 lbs34,000\text{ lbs} maximum allowable total load on two or more consecutive axles spaced between 4040 and 96 inches96\text{ inches}
  • Federal Maximum Gross Combination Weight80,000 lbs80,000\text{ lbs} statutory maximum total weight for commercial vehicle combinations on interstate highways without special permits
  • Gross Axle Weight Rating (GAWR)The manufacturer's maximum specified weight-bearing capacity for a single axle assembly and its supporting components

Answer

Federal Single Axle Limit matches 20,000 lbs20,000\text{ lbs} maximum load; Federal Tandem Axle Limit matches 34,000 lbs34,000\text{ lbs} maximum load on axles spaced 40–96 inches40\text{--}96\text{ inches}; Federal Maximum Gross Combination Weight matches 80,000 lbs80,000\text{ lbs} interstate combination limit; Gross Axle Weight Rating (GAWR) matches the manufacturer's specified structural capacity for an individual axle assembly.
Each weight parameter aligns with its federal standard or engineering definition: single axle limit is 20,000 lbs20,000\text{ lbs}, tandem axle limit is 34,000 lbs34,000\text{ lbs}, maximum gross combination weight on interstate highways is 80,000 lbs80,000\text{ lbs}, and GAWR is the manufacturer-assigned structural rating for an axle assembly.

Step-by-Step Solution

1
Identify statutory federal axle weight limits for single and tandem configurations.
Single axles are capped at 20,000 lbs20,000\text{ lbs}, while tandem axles spaced 4040 to 96 inches96\text{ inches} apart are capped at 34,000 lbs34,000\text{ lbs}.
Federal bridge and pavement protection statutes limit axle loads to prevent pavement damage.
2
Determine the federal statutory cap for overall gross combination weight.
The federal maximum gross combination weight is 80,000 lbs80,000\text{ lbs} without oversize or overweight permits.
Federal regulations govern total vehicle mass on interstate highways to preserve infrastructure integrity.
3
Distinguish statutory road limits from manufacturer ratings.
GAWR is the mechanical/structural rating assigned by the vehicle manufacturer to an individual axle assembly.
Ratings reflect physical component capacities (suspension, tires, brakes), whereas statutory limits reflect legal road limits.

Key Concept

Distinction between federal statutory weight limits (single axle, tandem axle, gross combination weight) and manufacturer structural ratings (GAWR).
Rate this question

Topics

Weight Definitions and Limits (GVWR, GCWR, Axle Weights)

More questions from this topic