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Old 04-02-2013, 12:58 PM   #1
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Hit the scales - Ram 3500 DRW + Sabre 36QBOK

I've long been a proponent of getting weighed in order to be educated and well versed. The sad secret is that I've also been woefully hypocritical in that I've never weighed my combination.

Each trip, my focus has been on getting out of town or getting back home and weighing was just extra time that I couldn't bring myself to do. That and it was dang intimidating! I had to hit the truck stop and play with the big boys. I didn't want to be in the way or hold them up. So my nerves would get the best of me.

I finally weighed on my way out of town this trip. I'm moderately loaded from a personal effects perspective. We did not go grocery shopping (little food and more importantly - lots less water (we usually carry 7 1/2 gallons in 2.5 gallon containers AND have a case of 16oz bottles)) before hand and we slowly accumulate things across the trips (meaning, by the end of the season, I'm definitely heavier than the beginning). I did fill my freshwater tank 2/3 full. My black and gray tanks were all mostly empty (nominal amount of antifreeze in each). Propane tanks are mostly full and I made a point to fill up fuel before hitting the scales. Very little in the truck bed (but that's pretty normal for us). We had an average load of snacks and goodies in the truck (maybe short a few bottles of water).

Everyone DID stay in the truck in the same seats and all for all 3 weightings.

I did 3 weightings:

#1 - Truck and camper hitched up:


#2 - Dropped the camper in a parking spot and weighed truck only:


#3 - Split the trailer axles across 2 platforms to get individual axle weights:
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Old 04-02-2013, 12:58 PM   #2
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So, here's what I know and what I'm thinking:

1) My truck's GVWR is 12,300 pounds. With my wife, 2 kids, infant seat, booster seat, hitch, bed cover, our crap and I, the truck weighs 9,200 pounds (#2 above). That gives me a functional available payload of 3,100 pounds.

1a) This is especially interesting in that our "payload sticker" stays that we have 4,297 pounds of available payload when the truck came from the factory. This means that our weight, my add-ons and our stuff weighs 1,197 pounds.

2) I've calculated my pin weight to be 2,180 pounds. This was WAY lower than I expected. I figured this by:
First weigh ticket: steer axle (5,220) + drive axle (6,260) = 11,480 pounds
Second weigh ticket: steer axle (5,240) + drive axle (3,960) = 9,300 pounds
Subtracting these two: 2,180 pounds
Can anyone confirm this?

2a) In fact, I'm confused. For #2 - I'm seeing 2,300 pounds added to the rear axle. I'm seeing 20 pounds removed from the front axle. 2,300 - 20 = 2,280. Where did 100 pounds go?

3) Hitching up my fifth wheel unloads my front axle by 20 pounds. I didn't expect this. I would have expected *some* weight to be pushed to the front axle.
Is this normal? My B&W hitch is at the "center" position because that's what the hitch installer "normally does".

4) My trailer axles are within 20 pounds of each other. Strangely - when I add the weights of the 3rd weighing, it doesn't equal the trailer weight from the first weighing:
1st weighing: 11,560 pounds for trailer
3rd weighing: 5,820 + 5800 = 11,620
Diff: 60 pounds
Can anyone explain this?

5) To ensure that I'm under the trailer's GVWR (15,875) -- do I add the pin weight (2,180) to the trailer weight (11,560)? That's 13,740 pounds.

5a) If my total weight is 13,740 pounds, does that mean my pin weight percentage is just shy of 16%? (2,180/13,740=15.8%) Which kind of makes sense given the dual opposing slides in the bunkhouse.

6) I'm under my gross vehicle weigh (GVWR) and axle weights on both the truck and the trailer.
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Old 04-02-2013, 04:38 PM   #3
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Second weigh ticket: steer axle (5,240) + drive axle (3,960) = 9,300 pounds

= 9200 lbs not 9300. Pin weight is 2280.
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Old 04-02-2013, 04:49 PM   #4
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Quote:
Originally Posted by ependydad View Post
This means that our weight, my add-ons and our stuff weighs 1,197 pounds.
Jenny Craig time.
Doc
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Old 04-02-2013, 04:59 PM   #5
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Just for the heck of it, did you get a weight with the landing gear on a section of the scale platform and the tandems on another section.?
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Old 04-02-2013, 05:03 PM   #6
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Corrections below based on lbrjet's comments above. Still a couple of questions (look for the italics).

----

2) I've calculated my pin weight to be 2,280 pounds. This was WAY lower than I expected. I figured this by:
First weigh ticket: steer axle (5,220) + drive axle (6,260) = 11,480 pounds
Second weigh ticket: steer axle (5,240) + drive axle (3,960) = 9,200 pounds
Subtracting these two: 2,280 pounds
Confirmed by lbrjet. Woot. Still way lower than I expected.

3) Hitching up my fifth wheel unloads my front axle by 20 pounds. I didn't expect this. I would have expected *some* weight to be pushed to the front axle.
Is this normal? My B&W hitch is at the "center" position because that's what the hitch installer "normally does".

4) My trailer axles are within 20 pounds of each other. Strangely - when I add the weights of the 3rd weighing, it doesn't equal the trailer weight from the first weighing:
1st weighing: 11,560 pounds for trailer
3rd weighing: 5,820 + 5800 = 11,620
Diff: 60 pounds
Can anyone explain this?

5) To ensure that I'm under the trailer's GVWR (15,875) -- do I add the pin weight (2,280) to the trailer weight (11,560)? That's 13,840 pounds.

5a) If my total weight is 13,840 pounds, does that mean my pin weight percentage is just shy of 16%? (2,180/13,840=15.75%) Which kind of makes sense given the dual opposing slides in the bunkhouse.
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Old 04-02-2013, 05:11 PM   #7
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Quote:
Originally Posted by SabreDoc View Post
Jenny Craig time.
Doc
LOL! Nah, according to my math - I've got a good 820 pounds until we're in trouble! Bring me deep fried pizza!

Quote:
Originally Posted by grayfox View Post
Just for the heck of it, did you get a weight with the landing gear on a section of the scale platform and the tandems on another section.?
I did not. With the gosh-awful slowness of the landing gear, this would have simply taken too much time and I would have been in the way. I was pretty surprised at how much traffic that scale had with commercial trucks. It was bad enough parking among them. (Funny story to that - I hit a blind spot as I was trying to park along side one; I must have looked rushed and concerned while a trucker waited. He waved - indicating that I had plenty of room and to go and laughed when I smiled/waved back. He was a godsend.)
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Old 04-02-2013, 05:47 PM   #8
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Quote:
Originally Posted by ependydad View Post
LOL! Nah, according to my math - I've got a good 820 pounds until we're in trouble! Bring me deep fried pizza!



I did not. With the gosh-awful slowness of the landing gear, this would have simply taken too much time and I would have been in the way. I was pretty surprised at how much traffic that scale had with commercial trucks. It was bad enough parking among them. (Funny story to that - I hit a blind spot as I was trying to park along side one; I must have looked rushed and concerned while a trucker waited. He waved - indicating that I had plenty of room and to go and laughed when I smiled/waved back. He was a godsend.)
Yep, I can understand that. I thought it would be interesting to see how the landing gear weight correlates to the pin weight, just a thought.

Hey, how about deep fried Twinkys ?
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Old 04-02-2013, 05:57 PM   #9
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Quote:
Originally Posted by ependydad View Post
LOL! Nah, according to my math - I've got a good 820 pounds until we're in trouble! Bring me deep fried pizza!
Stop! You're making me hungry!
Doc
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Old 04-02-2013, 06:15 PM   #10
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On edit- the propane tanks definitely were NOT full. Apparently they were flat out empty!
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