Cargo Carrying Capacity

[carp65]

What is the formula for calculating Cargo Carrying Capacity?

[dahkota]

Bill.Satellite wrote:
If you weigh 30,000 pounds and your axles are rated for a total of 29,000 you can still add 1,000 pounds.

Wait, what? Is that backwards?

[Tom_Barb]

First and fore most, you must know the empty weight of the coach. then do the math using the placard numbers for each axel max weight.
WE weigh 27,300# empty, we gross at 43,000' we are allowed 10,000 of that to be a towed, so the numbers are 43,000 - 10,000 is 33,000 for the coach 33000-27300 for load of 5700# in the coach. We have never came close to that weight.

[Bill_Satellite]

First you need to know what the coach weighs with full fuel, full fresh water, full propane (if appropriate), empty holding tanks and at least 2 people on board.
It gross weight can be determined at a truck scale but it better determined by a 4 wheel weighing.
Once you know the coach weight, you can compare that to the weight ratings of the front axle, rear axle and (if you have one) tag axle. If you weigh 30,000 pounds and your axles are rated for a total of 29,000 you can still add 1,000 pounds. However, and this is why 4 point weighing is important, the weight may not be equally spread and you could already be over weight on one axle.
Now, if you weight 30,000 pounds and the axles are rated for 30,000 pounds (not uncommon) you have a serious problem on your hands.

[pulsar]

Although CCC is no longer used, here is how it was defined by RVIA in 2000.

(Other definitions are given for clarity.)

• GVWR: Gross Vehicle Weight Rating
  
  
• UVW: Unloaded Vehicle Weight (1996 RVIA Definition)
  Unloaded Vehicle Weight (UVW) is the weight of a vehicle as manufactured at the factory. It includes full engine and generator fuel tanks and fluids, if applicable. It does not include cargo, water, propane, or dealer-installed accessories. Be aware that some manufacturers weigh each unit to determine UVW, while others provide only the average or estimated weight for each model.
  
  Note: Some dealers include the weight of all factory installed options; other include the weight of commonly ordered factory installed options.
  
  
• SCWR:
  Sleeping Capacity Weight Rating (2000 RVIA Definition)
  The manufacturers designated number of sleeping positions multiplied by 154 pounds (70 kilograms)
  
  
• CCC:
  Cargo Carrying Capacity (2000 RVIA Definition)
  Equal to GVWR minus each of the following: UVW, full fresh potable water weight (including water heater), full LP gas weight and SCWR.
  
  
• NCC:
  Net Carrying Capacity
  Equal to GVWR - UVW
  

The federal government (NHTSA) developed its own standard, Occupant and Cargo Carrying Capacity or OCCC, which is a very different number. CCC is in addition to water and passengers; water and passengers are part of the OCCC number.

A label is required (by the Feds) to be affixed to the coach with the following information:

"The Combined weight of occupants and cargo should never exceed
xxx lbs or xxx Kgms
Seat belt equipped seating is X

CAUTION
A full load of water equals xxx Lbs or XXX Kgms of cargo 1 gal =8.3lbs and the tongue
weight of a towed trailer counts as cargo."

The label should be black type on a yellow background.

In our coach the label is affixed to the wall just to the left of the driver and is beside the VIN number label.

Note: for trailers, the NHSTA defined a CCC, different from that defined by RVIA. It is the same as OCCC except the number does not include the weight of passengers.

Tom

[horizon36]

Take the actual weight of the RV as delivered and then add: full water, full fuel, full propane. Either know the weight of all your passengers or add 165#'s for each one. Deduct that weight from the GVWR and you have the amount you can carry in addition. Such as food, clothes, tools and all your other supplies. On my coach that came to about 3,500#'s.

Look at the rigs specs as their calculated number will be there and will be a guestimate.

[Ivylog]

It is the difference in GVW and the weight ready to travel... 165lbs x number of sleeping positions, full fuels, and full water. Agree you may not be able to use all of it but that does not change the posted CCC.

[Two_Jayhawks]

I don't think you can just subtract unloaded weight from GVWR. It requires weighing the coach at least by axle. What good is 8000lbs CCC if it is all on one axle?

[2oldman]

GVW - unloaded weight. Or, look at the specs.