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Zorluk: ZorWeight Definitions and Limits (GVWR, GCWR, Axle Weights)

A commercial motor carrier is operating a two-axle straight truck coupled to a two-axle equipment trailer on an interstate route. The vehicle specifications and manufacturer ratings are as follows:

Vehicle UnitUnladen Curb WeightManufacturer GVWRManufacturer GCWR
Straight Truck12200 lbs12{}200\text{ lbs}26000 lbs26{}000\text{ lbs}38000 lbs38{}000\text{ lbs}
Equipment Trailer4500 lbs4{}500\text{ lbs}15000 lbs15{}000\text{ lbs}Not Applicable

If the straight truck is loaded to its maximum Gross Vehicle Weight Rating (GVWR) of 26000 lbs26{}000\text{ lbs}, what is the maximum payload weight that can be placed on the equipment trailer without exceeding any manufacturer rating or combination limit?

  1. A
    10500 lbs10{}500\text{ lbs}
  2. 7500 lbs7{}500\text{ lbs}Cevap
  3. C
    12000 lbs12{}000\text{ lbs}
  4. D
    15000 lbs15{}000\text{ lbs}

Cevap

The maximum payload that can be loaded onto the trailer is 7500 lbs7{}500\text{ lbs}.
Gross Combination Weight Rating (GCWR) sets the maximum safe operating weight for the entire combination (truck, trailer, and total cargo). Because the straight truck is loaded to its maximum GVWR of 26000 lbs26{}000\text{ lbs}, the trailer's total gross weight cannot exceed 12000 lbs12{}000\text{ lbs} (38000 lbs−26000 lbs38{}000\text{ lbs} - 26{}000\text{ lbs}). Subtracting the trailer's empty curb weight of 4500 lbs4{}500\text{ lbs} leaves a maximum allowable cargo payload of 7500 lbs7{}500\text{ lbs}.

Adım Adım Çözüm

1
Determine the maximum allowable Gross Combination Weight (GCW) for the vehicle configuration.
The towing vehicle's manufacturer GCWR is 38000 lbs38{}000\text{ lbs}.
Gross Combination Weight Rating (GCWR) is the maximum allowable total weight of the powered unit, trailer, and all cargo combined.
2
Calculate the remaining gross weight available for the towed unit when the truck is loaded to its GVWR.
38000 lbs−26000 lbs=12000 lbs38{}000\text{ lbs} - 26{}000\text{ lbs} = 12{}000\text{ lbs}
The power unit operates at its maximum GVWR of 26000 lbs26{}000\text{ lbs}, leaving 12000 lbs12{}000\text{ lbs} of total combination capacity.
3
Compare the available combination capacity against the trailer's individual GVWR to identify the binding limit.
The GCWR allowance (12000 lbs12{}000\text{ lbs}) is lower than the trailer's GVWR (15000 lbs15{}000\text{ lbs}), making GCWR the controlling limit.
A combination vehicle must satisfy both individual unit GVWRs and overall GCWR simultaneously; the more restrictive limit governs.
4
Subtract the trailer's unladen curb weight from the maximum allowable gross trailer weight to find net allowable payload.
12000 lbs−4500 lbs=7500 lbs12{}000\text{ lbs} - 4{}500\text{ lbs} = 7{}500\text{ lbs}
Payload represents net cargo capacity after accounting for the tare/curb weight of the trailer.

Anahtar Kavram

Interaction between Gross Vehicle Weight Rating (GVWR), Gross Combination Weight Rating (GCWR), and net payload calculation

Alternatif Yöntem

Calculate the total unladen combination weight first (12200 lbs+4500 lbs=16700 lbs12{}200\text{ lbs} + 4{}500\text{ lbs} = 16{}700\text{ lbs}). The total combination payload capacity is GCWR minus total curb weight (38000 lbs−16700 lbs=21300 lbs38{}000\text{ lbs} - 16{}700\text{ lbs} = 21{}300\text{ lbs}). The truck is carrying 26000 lbs−12200 lbs=13800 lbs26{}000\text{ lbs} - 12{}200\text{ lbs} = 13{}800\text{ lbs} of cargo. Subtracting the truck cargo from the combination cargo capacity yields the remaining trailer payload: 21300 lbs−13800 lbs=7500 lbs21{}300\text{ lbs} - 13{}800\text{ lbs} = 7{}500\text{ lbs}.
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Weight Definitions and Limits (GVWR, GCWR, Axle Weights)

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