Operating Era: 1904-1953. THIS SERIES NOW COMES WITH OUR NEW ONE-PIECE ROOF FRAME. Southern Pacific, Union Pacific, Illinois Central, Central Pacific, Oregon & California, Houston & Texas Central, Chicago & Alton. The Harriman standard 40` box car was designed for all the roads Harriman controlled in the early 1900`s. One of the first steel underframe designs, almost 19,000 were built between 1904 and 1909. UP and IC cars were rebuilt in the 1920`s with steel ends; many SP and UP cars wound up in MOW service.