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

Match each commercial vehicle weight regulation or rating standard to its correct technical and statutory definition.

  • Gross Axle Weight Rating (GAWR)The maximum weight-bearing capacity specified by the manufacturer for a single axle system, including its suspension, brakes, and wheels.
  • Bridge Gross Weight FormulaA statutory formula that restricts maximum axle group load based on the number of axles and the distance between them to protect road and bridge structures.
  • Federal Tandem Axle LimitThe maximum allowable weight of 34000 lbs34{}000\text{ lbs} across two consecutive axles spaced between 40 inches40\text{ inches} and 96 inches96\text{ inches} apart on federal highways.
  • Tire Load LimitThe maximum carrying capacity molded onto the sidewall of a tire at a specified cold inflation pressure.

Answer

Gross Axle Weight Rating (GAWR) pairs with the manufacturer-specified maximum weight capacity for a single axle system; Bridge Gross Weight Formula pairs with the statutory formula restricting axle group loads based on axle spacing; Federal Tandem Axle Limit pairs with the 34,000 lbs statutory limit on two consecutive axles spaced 40 to 96 inches apart; and Tire Load Limit pairs with the maximum carrying capacity molded on the tire sidewall at cold inflation pressure.
Each rating and regulation serves a distinct purpose in commercial vehicle safety. GAWR is the manufacturer's mechanical rating for an axle system; the Federal Tandem Axle Limit is a federal statutory cap of 34000 lbs34{}000\text{ lbs}; the Bridge Gross Weight Formula regulates weight distribution across multiple axles based on spacing; and the Tire Load Limit defines the safe capacity of individual tires based on sidewall markings.

Step-by-Step Solution

1
Identify the manufacturer rating for an individual axle assembly.
Gross Axle Weight Rating (GAWR) corresponds to the maximum structural capacity of a single axle assembly specified by the vehicle manufacturer.
GAWR represents the structural mechanical limit of an axle subsystem rather than a roadway legal formula.
2
Identify the calculation used to prevent bridge and highway structural overload based on axle spacing.
The Bridge Gross Weight Formula corresponds to the mathematical standard based on axle spacing and axle quantity.
The Bridge Formula spreads heavy loads over longer distances to reduce concentrated stress on bridge spans.
3
Identify the standard federal legal limit for a two-axle grouping.
The Federal Tandem Axle Limit corresponds to the statutory 34000 lbs34{}000\text{ lbs} restriction for axles spaced 40 to 96 inches40\text{ to }96\text{ inches} apart.
Under federal size and weight regulations, tandem axles on the National Network are legally capped at 34000 lbs34{}000\text{ lbs}.
4
Identify the component-level limit based on pneumatic tire specifications.
The Tire Load Limit corresponds to the maximum sidewall-rated load capacity at cold inflation pressure.
Tires have explicit load limits dictated by tire size, ply, and inflation pressure.

Key Concept

Distinguishing between manufacturer component ratings (GAWR, Tire Load Limit) and statutory legal weight limits (Bridge Formula, Federal Tandem Axle Limit).
Estimated Time:1m 15s
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Topics

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

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