Scale Mechanical Drawings By American Car and Foundry Company. Drawings are for a 40' 6" 50 ton steel sheathed boxcar. All pages have been approved by the Chief Mechanical Engineers Office of the Chicago and North Western Railway. Blue prints are in fair to good condition with chipping and minor tears to edges and sides. Blue prints have been rolled and are curled increased with age discoloration from storage. Blue print measures approximately 38 1/2 inches wide by 27 inches tall.