12-25-2009, 03:23 PM
I think that the LT.WT. also includes the weight of the trucks, as they're on the car when it's weighed and the total weight does affect the amount of cargo which can be carried. A typical truck for that car would probably weigh 5 - 5 1/2 tons.
For a fifty ton car such as the one below, the sum of the LT.WT. and the LD.LMT. must total 169,000, so, in order to determine the figure for the LD.LMT., the actual weight of the empty car (LT.WT.), in this case 41,100, is deducted from the 169,000 figure, giving the LD.LMT. of 127,900 - in other words, this particular "50 ton boxcar" can carry up to almost 64 tons.
![[Image: Latestprotofoe-toes026.jpg]](http://i23.photobucket.com/albums/b399/doctorwayne/locos%20switching%20industries/Latestprotofoe-toes026.jpg)
This fifty ton hopper, however, with a LT.WT. of 40,500 is capable of carrying 128,500lbs. or just over 64 tons.
![[Image: Latestprotofoe-toes034.jpg]](http://i23.photobucket.com/albums/b399/doctorwayne/locos%20switching%20industries/Latestprotofoe-toes034.jpg)
There were set figures for 40, 50, 55, and 70 ton cars similar to that arbitrary 169,000 figure for 50 ton cars which helped to determine the maximum carrying capacity of a car, based on the car's LT.WT., but there were also some special case situations where the total of the two figures would not agree with the arbitrary number for a particular car.
Wayne
For a fifty ton car such as the one below, the sum of the LT.WT. and the LD.LMT. must total 169,000, so, in order to determine the figure for the LD.LMT., the actual weight of the empty car (LT.WT.), in this case 41,100, is deducted from the 169,000 figure, giving the LD.LMT. of 127,900 - in other words, this particular "50 ton boxcar" can carry up to almost 64 tons.
This fifty ton hopper, however, with a LT.WT. of 40,500 is capable of carrying 128,500lbs. or just over 64 tons.
There were set figures for 40, 50, 55, and 70 ton cars similar to that arbitrary 169,000 figure for 50 ton cars which helped to determine the maximum carrying capacity of a car, based on the car's LT.WT., but there were also some special case situations where the total of the two figures would not agree with the arbitrary number for a particular car.
Wayne