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Old 07-17-2016, 10:35 AM   #1
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How Do You Weigh Your Airstream?

I realized that this is not something most people do often, so I figured I'd share my method.

I downloaded two apps to my iPhone. CAT Scale and Weigh My Truck (also from CAT Scale).

CAT Scale is an app that shows all the locations of CAT Scales. I used it to find my nearest CAT Scale.

Weigh My Truck is the app you use once you get to the scale to order and pay for the weigh service. It costs $10.50 to weigh your truck.

The Weigh My Truck app let me sign in to PayPal so I could pay the $10.50 fee. I did this before I got to the scale so I wouldn't waste time signing up there. If you do not use PayPal I assume you can pay at the cashier.

What you do is you drive to the scale. Watch carefully as there is one entrance and one exit. The entrance will be the one that when you drive up to the scale, the call box will be on you drivers side window.

These scales are meant for 18 wheeler trucks, so the call box will be a little too high for a regular truck. No worry, since you won't be using the call box. The app uses your GPS and knows you are at a scale. Run the app, hit the accept button, and your done.

That's it?

That is it.

A buzzer will alert the attendant your are waiting to be weighed, and they will activate the scale and print out the results. You need to walk into the cashier to pick up the printed ticket if you want it. They will email you a PDF so you don't need to pick up the hard copy if you don't want to.

The ticket will show four weights. The overall gross weight is what everything weighs. Then you will get one weight for your front tow vehicle axle, one for your tow vehicle rear axle, and one for your trailer axle(s).

Compare the weights of you tow vehicle axles to the weight ratings of the axles shown in a sticker on the front door jamb of your tow vehicle. As long as you don't exceed them, you're ok. If you exceed them, well, time to go on a diet or buy a new truck with higher ratings.

Hope this helps someone else who wants to weigh their truck and trailer.



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Old 07-17-2016, 10:44 AM   #2
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That's worthwhile. Have you used it for re-weighs? Initially at least I like to weigh just the truck, then the combo without WD, and finally the combo with WD.

I have been to a CAT scale, but my nearest one is over 40 miles away. I have used a local moving company. Their weights compare favorably with my CAT scale weights. The only problem is they have a single platform so I weigh the TV front, the whole TV, and then the trailer. I do this three times as above. All I have to do is subtract reading 1 from reading 2 in each of the three sets to get the rear axle.

It's about the same price and saves me an hour and a half drive and about $10 worth of fuel.

Al
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Old 07-17-2016, 10:54 AM   #3
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This was my first time. I've only had the trailer 2 months. This CAT scale is 20 miles from me, but just about anything is 20 miles from me. I keep the trailer at a fairly secluded RV resort.

My plan is to weigh when I got out to kill two birds with one stone. I'm pretty happy with what I got so I don't have plans to weigh it differently.
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Old 07-17-2016, 10:57 AM   #4
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I go on e a year. Since my suburban is loaded for festivals( i have removed two rows of seats) i want to make sure I come in nder magic numbers.
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Old 07-17-2016, 11:44 AM   #5
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In Oregon there are a lot of weigh stations that are often unmanned - or never manned - that are always on. It's just a matter of pulling over and weighing one axle at a time. Very convenient.

John
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Old 07-17-2016, 04:00 PM   #6
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I have weighed my rig too. But I weighed both axles on the AS. They were quite different, and I had to rethink how I loaded the interior. The back axle was light compared to the front, so I moved supplies to the rear....your thoughts ?
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Old 07-17-2016, 04:26 PM   #7
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I'm not certain why two axles that are so close to each other can have significantly different weights. If they do, that's a problem I'm blissfully ignorant about, and will remain so. As far as I'm concerned, one weight for both should be enough.
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Old 07-17-2016, 06:57 PM   #8
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Thumbs up How I do it....

Three weights.

TV alone, loaded for camping...


AS & TV, loaded, no WD................AS & TV with WD set.


With WD set the rig is LEVEL and all but 100lbs has been returned the the steering axle.

?????.... your Str axle w/o the trailer is, ?

Bob
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Old 07-17-2016, 10:19 PM   #9
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Quote:
Originally Posted by FCStreamer View Post
I'm not certain why two axles that are so close to each other can have significantly different weights. If they do, that's a problem I'm blissfully ignorant about, and will remain so. As far as I'm concerned, one weight for both should be enough.
I'm not an engineer or mathemetician, but my reading concerning tandem axle trailers tells me that it IS important that neither axle be overloaded. Overloading beyond axle, tire, or wheel rating can cause failure.

Can this happen? Yes, if the weight distribution is way off in either direction. Keeping tongue weight within the optimal 12-15% range takes care of the problem.

I welcome elaborations, corrections, or contradictions if someone has other experience or knowledge. I sure learn a lot on this forum!
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Old 07-17-2016, 10:59 PM   #10
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If you live near a state border there well be DOT scales. Ive been using them for years its free and very accurate.
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Old 07-18-2016, 01:04 AM   #11
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If you live near a state border there well be DOT scales. Ive been using them for years its free and very accurate.
"Very accurate." Most likely true. "Free" most likely false.

Money well spent IMHO, but nevertheless someone's money built and maintains the DOT scales.

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Old 07-18-2016, 06:25 AM   #12
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My first thought about the trailer axles having substantially different weights:
Is the trailer level when hitched up? If the tongue is high, there will be more weight on the rear axle. If the tongue is low, there will be more weight on the front axle.

Different weights on left to right sides of the trailer would be caused by the way items are loaded within the trailer.
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Old 07-18-2016, 09:22 AM   #13
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If you live near a state border there well be DOT scales. Ive been using them for years its free and very accurate.
Are these the scales that all the trucks pull off the interstate when crossing state lines? They allow RVs? I guess its best to go during slow periods?
I guess you only get to weigh tow+trailer with WD?

Kelvin
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Old 07-18-2016, 01:16 PM   #14
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Are these the scales that all the trucks pull off the interstate when crossing state lines? They allow RVs? I guess its best to go during slow periods?
I guess you only get to weigh tow+trailer with WD?

Kelvin
Yes that the scales im referring too Ive never had an issue using them. Most of them have a route to reweigh built in and an area to park and make hitch adjustments. One thing to note is you dont get a print out like a cat scale and weight in motion aka under 3mph. So have a pen and paper handy as you roll across.
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