Norfolk and Western 80 Ton Steel Frame Coal Car
The April 1900 edition of the American Engineer and Railroad Journal featured drawings of a new design that was then being developed by the Norfolk & Western Railway (N&W) for a 80 Ton Steel frame coal car. The article states that the N&W was planning to build 1,000 of these cars in the near future at its Roanoke shops.
The coal car was equipped with four drop doors, handled by winding shafts, chains, ratchets, and locks and was equipped with Westinghouse air brakes. The car was designed to take a lading of 88,000 pounds not to exceed 10,000 pounds fiber strain in its members. The N&W tested the car with a 95,250 pound load with satisfactory results. Newly designed diamond arch-bar trucks was used on the car, drawings of which are included in the article.
To obtain the drawings of the 40 ton steel frame coal car (shown below), visit Google Books and download a copy of the book (PDF).