factoring the weight of fuel and you.

It is roughly 7 lbs per gallon,so your looking at about 1400 lbs.

 

Water 8.0 lbs per gallon

Fuel about 7 .2 lbs per gallon


I always use water when figuring the wieght when I'm getting fuel .

 

You say you still have 200lbs. too spare after you fueled,I don't get what your asking here???

 

The only dumb question is the one you don't ask.and then get caught with your pants down by DOT.
As for the question at hand if you are m/t on fuel and you scaled out at 80,000 lbs then you are pretty much screwed there is no place to move the weight you are already at gross.
There are alot of factors involved but if I could scale it I would put on 50 to 100 gallons of fuel and run it.But then you have your log book to consider because you are going to have to stop for fuel more often.

 

Always remember that fuel weight is carried on the tractor, and unless you can adjust some weight by sliding the trailer or the 5th wheel, you are stuck with that weight. I run in a weight sensitive area, and always have to factor in the amount of fuel that I have on the truck, how far I have to go, and when and where I can fuel up. It can be a real balancing act sometimes. Last week one morning, I was low on fuel because I wqs heavy and had a scale to get across. I kept the fuel quantity low. Unfortunately, having 3/4 of the tank as open air space in the -2 degree weather resulted in my fuel gelling up and stopping me on the side of the road. If I had fueled up all the way, the fuel would have retained enough warmth that I never would have gelled, but then I would have been over on weight. Sort of ###### if you do, ###### if you don't.

 

How many drivers have ever achieved the maximum weights on a tandem/tandem five-axle? In the real world, a driver should aim for a gross of 79,000 lbs to be safe crossing state scales. For one thing, certified truck stop scales may be inaccurate by as much as 1,000 lbs. I know, I weighed on the side by side Cat scales at Oak Creek, WI. One scale showed 1,000 lbs more than the other scale. Also, your legal tandem weight is actually 17,000/17,000. Your front drive axle has the power divider and may have the maxi-brakes. It will weigh more than your second drive axle. And again, your steer axle weight may be limited by the tire foot print, and capacity as shown on the side wall. This talk about 80,000; 12,000, 34,000, 34,000 is strictly theoretical. It results in dodging the scales.