O Scale Hell Gate Bridge - Cream & Green Bridge length: 34.5” Space between footers: 19 1/8” Footer length: 7 5/8” Bridge width (footer width): 15 3/16” Clearance under roadbed: 5 3/4” Height to track bottom: 6 1/2” Center rail to Center rail spacing: 4” Min gap between track (roadbed edges): 3/4”