4 in the steel mill and industrial areas. The maximum grade is 2%. The HO scale layout, built with L-girder benchwork, ranges in height from 43" to 60". It features Homasote roadbed on ¾" plywood ...

Mainline run: 200 feet (double-track outer main), 125 feet (single-track inner main) Minimum radius: 30″ (main), 22″ ...