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Old 07-24-2013, 09:04 PM   #1
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Join Date: May 2011
Location: Northeastern Michigan
Posts: 26
RV & Truck Weight Issues

Had my 5th wheel weighed today, and left the scale with several numbers plus some questions. Looking at the RV and truck rating placards indicates that I'm below some maximums, and are possibly exceeding others. Does anyone know of any fairly comprehensive
publication(s) that explain in understandable terms how to interpret the various ratings such as GAWR, GVWR, etc. - plus how close to those maximums I can safely go? Also, how to most accurately measure the king pin weight in my truck? Thanks

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Old 07-24-2013, 09:17 PM   #2
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Location: Southeast Wisconsin
Posts: 6,951
This is an excellent read and calculator. Both by Changin' Gears...

Understanding RV Weights
Fifth Wheel Weight Calculator

Hope that helps!

DW, 3 Kids and our Goldens

2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD
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Old 07-24-2013, 09:43 PM   #3
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If you want to post your numbers, we can try to help you make sense of them.

plus how close to those maximums I can safely go?
IMO, you can use it up to the maximums. Given the number of people who tow over them with no immediate ill effects, I think it can only be assumed that these numbers are safely padded. (Though, for me- I'll do what I can to not exceed them.)

Also, how to most accurately measure the king pin weight in my truck?
The way that I calculate it is via 2 weighings of the truck:
1) with the truck + camper getting weights for the front/steer axle, rear/drive axle and the trailer axle(s)
2) with just the truck getting weights for the front/steer axle and rear/drive axle

Essentially the difference of the sum of the truck axles loaded (#1) minus the truck axles unloaded (#2). The only caveat is in situations where you're unloading weight from the front axle - in that case, I think you should subtract the 2 rear axle numbers to get your pin weight.

Finally, here's a 4-part blog series on my weightings for my truck & camper:
Learn To RV: Getting Weighed - an adventure at the CAT Scales
2013 Sabre 36QBOK pulled by a 2012 Ram 3500 DRW
Blogs: Learn to RV & Personal Fulltiming Adventure
Towing Calculators: Towing Planner
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