The Stovebolt Site Forums The Parking Lot Big Bolts GVW ratings

I have a lead on a salvagable Farmi log loader, and I think I want to build a small log truck. I tried a quick search, and came up w/ nada. I am looking for the GVW ratings of the different Chevy/ GMC truck models, particularly larger ones like C50 and C60. Am I correct that C60 is the largest single axle truck--no C70 or 80?
In a related vein, what are the model designations for tandem axle models?

What years or year range are you interested in??

Prefer 55-66

check your shop manual, will have all you need to know including that tandems [55-59] are an RPO on the 10000 series - 55 manual here if you don't have one

Bill

Thanks, Squeeze. It can't get any easier. I checked my 57 manual, and to the right of the GVW column is a column labeled Gross Comb. Weight. For a 6100, GVW is 21000, Gross Co. Wt. is 32000. The book describes GVW as truck plus payload, but they don't describe Gross Comb. Weight. What's the deal?

GVW is actually truck, fuel, people and payload, the GCWR is the truck GVW + allowable towed vehicle GVW, so the 6100 could pull a trailer that had a total weight of 11000

Bill

I would have never figured that out!

GVWR= Gross Vehicle Weight Rating
GCWR= Gross Combined Weight Rating
GAWR= Gross Axle Weight Rating

The GVW is figured as the sum total of all the least rated components. So if you have a 9000lb axle with 10:00x20-12PR and the truck is equipped with 9:00x20-12PR or 10PR then it would not be rated at the maximum axle rating of 9000 but whatever the smaller tires would allow for. That is the FMVSS currently in effect. For our older trucks it may not hold true but it still makes sense to follow it for safety.

FWIW, the upfitter of a new C&C is responsible for determining the lawfull GVWR and providing a sticker statement to that effect. Some aftermarket upfitters of a tag or pusher axle may decide not to increase the GVWR even tho' the truck could now safely haul more. This is done to avoid being leaglly liable and sometimes to avoid a Federal Excise Tax which becomes the responsibility of the vehicle owner to pay to the IRS. This is what the vehicle manufacturers have successfully pushed off on small business to avoid responsibility/penalties. darn Yankees.
A little off topic but thought many might find it interesting.

Actually the trailer could weigh more assuming the truck wasn't already loaded to GVWR before adding the trailer. Let's assume it is set up as a tractor. If the truck and all necessary equipment, fuel, driver, etc. weighed 12,000lbs, for example you could pull 20,000 lbs. The GCWR is just the total weight rating for truck and trailer combined. Of course you still have to consider the weights on each individual axle.