Norfolk and Western 100 Ton Steel Frame Hopper Car
The June 1889 edition of American Engineer and Railroad Journal featured drawings of a 50-ton steel frame hopper car designed by the Norfolk & Western Railway (N&W). The article noted that orders had been place for materials for building 1,000 of the cars in the N&W's Roanoke shops.
The underframe of the N&W car was made entirely of steel but the car used wooden hoppers with drop bottoms. The N&W car used arch-bar trucks with 5'6" axle spacing. Drawings of the arch-bar trucks are included in the article.
To obtain the drawings of the Norfolk & Western 100-ton steel frame hopper car (shown in the article below), visit Google Books and download a copy of the book (PDF).