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Old 07-16-2018, 09:01 AM   #1
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OK, now what? Help with CAT weights.

Went to CAT scales and got TV weights and TT/TV weights. Now what....how do I use them...is there a fiver worksheet to use? Here's the numbers:

TT- Steer axle 3580 lbs., drive axle 2740 lbs., gross weight 6320 lbs.
TT/TV- steer 3720, drive 4540, trailer 7380, gross weight 15640.

Truck stickers- payload cargo capacity 2405 lbs., GVWR 8200 lbs., front GAVR 4050, rear GAVR 4800.

Jayco states fiver fully loaded is 9950 lbs. max and a 1505 lbs. hitch weight. Ford states max tow is 11,300 lbs.

The CAT scale weights are with our fully loaded fiver and truck (3 gals. water, 2 full LP tanks, 36 gals. gas, 2 passengers and a dog), on our way to a week of camping.

How does this all look to you? Am I over weight anywhere or under? Thanks.

Happy RVing,
Jeff
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Old 07-16-2018, 09:49 AM   #2
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Here is a great website to use. You just put in all the info that you have for weights and it does all the calculations for you. It will also give it to you in percentages of max ratings. Did you weigh the truck alone without the trailer? If you didn't you will need that info also as well as your trucks GCWR. Good luck.

http://boloneyontheroad.com/rv-truck...ravel-trailer/
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Old 07-16-2018, 12:53 PM   #3
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Quote:
Originally Posted by neil11975 View Post
Here is a great website to use. You just put in all the info that you have for weights and it does all the calculations for you. It will also give it to you in percentages of max ratings. Did you weigh the truck alone without the trailer? If you didn't you will need that info also as well as your trucks GCWR. Good luck.

RV / Truck Weight Calculator - 5th Wheel and Travel Trailer - Boloney On The Road
Thanks for the link!
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Old 07-16-2018, 03:56 PM   #4
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Looks like your pin weight is 1940 (6320-3720-4540=1940, or hitched steer axle weight plus hitched drive axle weight minus unhitched vehicle weight) and your trailer weight is 9320 (15640-6320=9320 or hitched combination weight minus vehicle weight).

Based on what I'm seeing, it looks like you're within your ratings.

How does it drive? Unfortunately (or fortunately) with a fiver, there's not a whole lot you can do to adjust? With a trailer, you can add and subtract weight on the front axle and change the dynamics of the combination quite a lot. Doesn't really matter though, your steer axle is heavier than unloaded, so your handling should be pretty good I would think.

Many of your acronyms are wrong though:
TT=Travel Trailer
TV=Tow Vehicle
GAWR Front=Gross Axle Weight Rating Front (maximum weight allowed on front axle; obtained from sticker on vehicle)
GAWR Rear=Gross Axle Weight Rating Rear (maximum weight allowed on rear axle; obtained from sticker on vehicle)
GVWR=Gross Vehicle Weight Rating (maximum allowable weight for each; truck or trailer; obtained from sticker on vehicle)
GCWR=Gross Combination Weight Rating (maximum allowable weight for the truck and all cargo and trailers; maybe on sticker in vehicle, in vehicle documentation if not)
GVW=Gross Vehicle Weight (scaled weight of each; truck or trailer)
GCW=Gross Combination Weight (scaled weight of loaded truck and trailer combination)
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Old 07-16-2018, 04:32 PM   #5
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Quote:
Originally Posted by Camper_bob View Post

Based on what I'm seeing, it looks like you're within your ratings.

How does it drive? Unfortunately (or fortunately) with a fiver, there's not a whole lot you can do to adjust? With a trailer, you can add and subtract weight on the front axle and change the dynamics of the combination quite a lot. Doesn't really matter though, your steer axle is heavier than unloaded, so your handling should be pretty good I would think.

Many of your acronyms are wrong though:
TT=Travel Trailer
TV=Tow Vehicle
GAWR Front=Gross Axle Weight Rating Front (maximum weight allowed on front axle; obtained from sticker on vehicle)
GAWR Rear=Gross Axle Weight Rating Rear (maximum weight allowed on rear axle; obtained from sticker on vehicle)
GVWR=Gross Vehicle Weight Rating (maximum allowable weight for each; truck or trailer; obtained from sticker on vehicle)
GCWR=Gross Combination Weight Rating (maximum allowable weight for the truck and all cargo and trailers; maybe on sticker in vehicle, in vehicle documentation if not)
GVW=Gross Vehicle Weight (scaled weight of each; truck or trailer)
GCW=Gross Combination Weight (scaled weight of loaded truck and trailer combination)
CBob - Thanks for the thumbs up. Ride handles good, drives good, and little resistance to big rigs and winds....so far.

The acronyms I reported are right of the door sticker. front and rear GAVR must be the same as GAWR you mentioned above, correct? If not, what the heck is GAVR?
Thanks.

Happy RVing,
Jeff
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Old 07-16-2018, 04:33 PM   #6
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Originally Posted by Marine71-76 View Post
Thanks for the link!
Marine - Thanks for the link. It was helpful. Semper Fi from an Army grunt.

Happy RVing,
Jeff
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Old 07-16-2018, 04:36 PM   #7
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Originally Posted by neil11975 View Post
Here is a great website to use. You just put in all the info that you have for weights and it does all the calculations for you. It will also give it to you in percentages of max ratings. Did you weigh the truck alone without the trailer? If you didn't you will need that info also as well as your trucks GCWR. Good luck.

RV / Truck Weight Calculator - 5th Wheel and Travel Trailer - Boloney On The Road
Neil - Thanks much for the website link. Good stuff.

Happy RVing,
Jeff
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Old 07-16-2018, 04:38 PM   #8
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I agree with Camper Bob all looks pretty good.
you have 470lbs left on the front axle
you have 260lbs left on the rear axle rating
you have 465lbs of payload left.
GCWR does not appear to be an issue at all if I read your post right

You can see Jayco's pin weight is garbage and is not the 1505 but the 1940lbs. You still have 635lbs of trailer weight available as well.

As long as the additional weight if you loaded it up more doesn't take you over the truck limits and it looks like rear axle is the only real point of concern if you were to load up the trailer to max weight. It would really depend on where the weight fell within the trailer. The farther back the less it will impact pin weight and your rear axle rating. Put it all in the upfront storage area and you will certainly be over but if all in the midline and back probably ok.
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Old 07-17-2018, 12:25 PM   #9
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Quote:
Originally Posted by havnfun View Post
CBob - Thanks for the thumbs up. Ride handles good, drives good, and little resistance to big rigs and winds....so far.

The acronyms I reported are right of the door sticker. front and rear GAVR must be the same as GAWR you mentioned above, correct? If not, what the heck is GAVR?
Thanks.

Happy RVing,
Jeff
Hm. I've never seen "GAVR" before... I just assumed you meant GAWR.

Google returns voltage regulators for that acronym...
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Old 07-17-2018, 03:18 PM   #10
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Quote:
Originally Posted by havnfun View Post
Went to CAT scales and got TV weights and TT/TV weights. Now what....how do I use them...is there a fiver worksheet to use? Here's the numbers:

TT- Steer axle 3580 lbs., drive axle 2740 lbs., gross weight 6320 lbs.
TT/TV- steer 3720, drive 4540, trailer 7380, gross weight 15640.

Truck stickers- payload cargo capacity 2405 lbs., GVWR 8200 lbs., front GAVR 4050, rear GAVR 4800.

Jayco states fiver fully loaded is 9950 lbs. max and a 1505 lbs. hitch weight. Ford states max tow is 11,300 lbs.

The CAT scale weights are with our fully loaded fiver and truck (3 gals. water, 2 full LP tanks, 36 gals. gas, 2 passengers and a dog), on our way to a week of camping.

How does this all look to you? Am I over weight anywhere or under? Thanks.

Happy RVing,
Jeff
Hi Jeff,

In short, the weights you've listed look good. Nothing major sticks out.

From the weights you've posted, here's how I interpret them:

(1) Loaded Frt Axle weight should be < Frt GAWR = 4050#
4050# - 3720# = 330# under Frt GAWR; you're good here

(2) Loaded Rear Axle weight should be < Rear GAWR = 4800#
4800# - 4540# = 250# under Rear GAWR; your good here

(3) Loaded Frt Axle weight + Loaded Rear Axle weight should be < Truck's GVWR = 8200#
8200# - (3720# + 4540#) = 8200# - 8260# = (60#) you're over the truck's GVWR.
IMO it's so minimal and all the other weights are good and as long as you're under the truck's GCWR, I wouldn't worry about it.

(4) Gross weight should be less then Truck's GCWR = ?
Truck's GCWR (?#) - 15640 = ? (you want it to be a positive #)
Do you know your Truck's GCWR?
I would guess you're under the Truck's GCWR


(5) Estimated FW Pin Weight (Loaded Frt Axle weight + Loaded Rear Axle weight) - Truck's unhitched gross weight.
(3720# + 4540#) - 6320# = 8260# - 6320# = 1,940#

(6) Total loaded FW weight = Est Tongue Weight + FW Axle weight.
1,940# + 7380# = 9320#

(7) Total Loaded FW weight should be less then FW GVWR = 9995#
Note I got your FW's GVWR = 9995 from Jayco's web site. Your FW's GVWR should be listed on a side sticker on your FW.
9995# - 9320# = 675# under FW's GVWR

(8) Est. Pin Weight / Loaded FW Weight = % Pin Weight should be between 20% - 25%
1,940# / 9320# = 20.8% Pin Weight, you're good here.

(9) FW Axle Weight should be less the Combined Max Axle Weight.
For example if you have 2 - 3,500# Axles then FW Axle Weight < 7,000#
The Max Axle Weights should be listed on the FW's side sticker.
Combined FW Listed Axle Weight - 7380# = ? (you want it to be a positive #)


Hope all this makes sense to you and is of some help.
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