Re: Coal Tower Usage

Now this is interesting. OK, I won't claim to be t5he brightest bulb in the box, so where am I mis-reading things?
The folio sheet (F173) for the 700 and 800 series cars gives the following dimensions.
"Marked Capacity, LBS - 50,000"
"Light Weight, LBS, AV - 24,500"
"Max Weight of Lading, Lbs, Av - 55,000"
Shouldn't this mean that the car has a capacity of freight of 50,000 lbs, beyond the 24,500 lbs light weight of the car? Now, I'd wonder if the volume of coal is such that the total cubic capacity of the car is reached before the weight capacity?
OK, waiting (or is that weighting?) for enlightenment....
Charlie Mutschler
-30-