EPDM Coatings
rvupgradestore.com Composet Products PO Box Zone
Over The Network Custom Yacht Interiors

Author Topic: confused about towing weight formula  (Read 602 times)

clockdrfla

  • ---
  • Posts: 120
confused about towing weight formula
« on: May 29, 2016, 10:05:51 AM »
Fifth wheel specs are dry weight 9731 lbs, payload capacity 2389 lbs, hitch weight 1740 lbs.  The truck is a 2011 Chevrolet CK2500HD diesel with a cargo carrying capacity of 2744 lbs.  Will this truck pull this 5th wheel safely and would I still be within the limit range or am I pushing it?  Thanks
« Last Edit: May 29, 2016, 10:10:52 AM by clockdrfla »

BoomerD

  • ---
  • Posts: 1195
Re: confused about towing weight formula
« Reply #1 on: May 29, 2016, 11:50:04 AM »
The usual calculation is 22% of your trailer TOTAL weight for the pin weight. Using your numbers, (9731 lbs + 2389 lbs = 12120 x 22% = 2666 lbs on the pin.)

You're right at the max payload for the truck...without people in the cab or cargo in the bed of the truck.
Current coach: 2004 Winnebago Sightseer 30B

Hatchee

  • ---
  • Posts: 68
Re: confused about towing weight formula
« Reply #2 on: May 29, 2016, 01:01:30 PM »
Fifth wheel specs are dry weight 9731 lbs, payload capacity 2389 lbs, hitch weight 1740 lbs.  The truck is a 2011 Chevrolet CK2500HD diesel with a cargo carrying capacity of 2744 lbs.  Will this truck pull this 5th wheel safely and would I still be within the limit range or am I pushing it?  Thanks

The only way to truly determine your hitch weight is to find CAT Scales and weight everything.  Everything else is just an approximation.

Here is a link to find scales that I saved for NC.  Just change the state in the pull-down: http://www.redhawkglobal.com/Resources/North-Carolina-CAT-Scale-Locations
'06 Montana 3400RL / Carlisle Radial Trail HD
'16 GMC Sierra 3500HD

grashley

  • ---
  • Posts: 3560
  • Western KY for now.
Re: confused about towing weight formula
« Reply #3 on: May 29, 2016, 06:15:47 PM »
THANK YOU FOR ASKING !!!!

As stated above, You will probably be okay, but you are definitely pushing the limit.  Technically, you may be over by a couple hundred pounds.  If you pack heavy things in the back of the FW, you can take some weight off the pin, which will help.  An Andersen Ultimate hitch, either gooseneck or rail mount, will also save 100# vs a standard style hitch.  Carry as little cargo in the truck as possible.

Trucks do not magically disintegrate if you are overweight.  Heavens, you see 2500 trucks hauling FW which must be 2000# overweight every day!  They ARE slowly destroying the truck, but you can't tell them anything.  You do not want to be one of them!! 

If / when you replace the truck, I would strongly suggest an upgrade.  Until then, keep the speed down and enjoy the RV life!!

FWIW, the "equation"  is simply, add the weight of everything being carried in the truck, passengers, pets, cargo, the hitch and pin weight.  This MUST be less than the CCC from the yellow label, which is the max weight the truck can legally carry.  Pin wt is typically 20% - 22% of the actual loaded FW weight.

Get it weighed and know for sure!
« Last Edit: May 29, 2016, 06:18:11 PM by grashley »
Preacher Gordon
09 Grand Junction 35 TMS - not yet received
2013 F350 Lariat LB SRW Supercab diesel 4X4
Nimrod Series 70 popup (sold)
It's not a dumb question if you do not know the answer.

clockdrfla

  • ---
  • Posts: 120
Re: confused about towing weight formula
« Reply #4 on: May 30, 2016, 01:39:23 PM »
So, how much does a fifth wheel hitch weigh?  Lets say truck passengers and cargo total 600 lbs, hitch weight according to the RV manufacturer is 1720 lbs.  What does this hitch weight mean, surely a fifth wheel hitch does not weigh 1720 lbs.  Sorry for being so dumb about this.  5th wheel dry weight is 9860 lbs, payload capacity of fifth wheel is 2640 lbs, hitch weight is 1740 lbs.  CCC of truck is 2744 lbs.  People are telling me a 3/4 ton Chevrolet CK2500 HD diesel can pull this with no problem that a dually would be an overkill.  Sorry for being such a PITA

grashley

  • ---
  • Posts: 3560
  • Western KY for now.
Re: confused about towing weight formula
« Reply #5 on: May 30, 2016, 07:26:32 PM »
IF YOU ARE STILL CONFUSED, ASK AGAIN!!

Typical 5th wheel (FW) pin weight is 15% - 25% of the actual FW weight, usually in the upper half of that range.
The FW dry (empty) weight is 9860# with a pin wt of 1740# , or 18%.  This is very typical.  Remember, this is an EMPTY trailer.

Yes, the pin wt of a FW CAN weigh 1700# on a small FW.  Large FW can have pin wts well over 3,000#

This FW is 9860# empty with a CCC of 2640#, so the FW loaded to capacity will weigh 12,500#, which is FW GVWR
Assuming 20% pin wt, this is 2500# pin wt carried by the truck.

If you have 600# people and cargo, 200# for a FW hitch, and 2500# pin wt, the truck is carrying 3300#, or 550# ABOVE CCC.

Can your truck pull this load?  Certainly.  Many people are pulling this load and much more on a daily basis with 2500 pickups. 
Are the legal?  Absolutely not!  Are they safe?  Maybe, but I would not be real comfortable pulling this.

There are ways to make it safer.  Be very careful how much weight you add to the FW, and load heavy stuff in the back to keep the pin wt down.  Use the lighter Andersen Ultimate hitch.  Go on a diet  ;D  ::)

Rerunning the numbers, if the pin wt is held to 2000#, use the Andersen hitch, 60# (hitch + rails) and 600# passengers, we are at 2660# and below CCC by 84#.

By contrast, a bumper pull TT will typically have a tongue weight of 10% - 12% of the TT weight.  This may be a source of your confusion.  There is a BIG difference between FW and TT.

I hope this helps.  If not, ask again.
Preacher Gordon
09 Grand Junction 35 TMS - not yet received
2013 F350 Lariat LB SRW Supercab diesel 4X4
Nimrod Series 70 popup (sold)
It's not a dumb question if you do not know the answer.

clockdrfla

  • ---
  • Posts: 120
Re: confused about towing weight formula
« Reply #6 on: May 30, 2016, 07:55:48 PM »
Many thanks grashley for taking the time to explain it again.  Sorry for being such a poor student.  Great site here.

grashley

  • ---
  • Posts: 3560
  • Western KY for now.
Re: confused about towing weight formula
« Reply #7 on: May 31, 2016, 10:53:24 PM »
You are not a poor student!  The poor student would have simply left confused.  The good student works until it is understood!

Glad to be of assistance!
Preacher Gordon
09 Grand Junction 35 TMS - not yet received
2013 F350 Lariat LB SRW Supercab diesel 4X4
Nimrod Series 70 popup (sold)
It's not a dumb question if you do not know the answer.

 

Hosted by Over The Network