I believe that this information is relevant for the your pictured car.
http://www.trainweb.org/nwrp/ttx/bttx880387data.htm
Cheers, the Bear.
"One difference between pessimists and optimists is that while pessimists are more often right, optimists have far more fun."
What size are the wheels of this particular articulated autorack car (Currently modeled by Atlas in HO and N scales)?