The GLd hoppers were a small class with only 300 built starting in 1919. Any resemblance to the GLa, for example, is co-incidental, because these were the only U.S.R.A. hopper cars the PRR owned. In other words, they were not modified GL or GLa cars. They went straight to the PRR-owned Long Island Railroad, but during October 1929 the cars became PRR road numbers 220000 through 220299.
These are two-bay hoppers that measured 31'11" end sill to end sill, and had an overall width of 10'3". They weighed 38,000 pounds and could carry a load of up to 100,000 pounds.
from my collection