Duct clearance below railroad should be how many meters below the top of the rail?

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Multiple Choice

Duct clearance below railroad should be how many meters below the top of the rail?

Keeping a solid vertical clearance under railroad lines is essential to protect the duct bank from track vibration, ballast kick-up, and maintenance activities, while still leaving room for future access and modifications. The standard practice is to maintain at least 1.27 meters (about 4.16 feet) measured from the top of the rail down to the top of the duct. This depth provides enough separation from the moving track and ballast, helps prevent damage during rail operations, and aligns with common design guidance for railroad crossings and rights-of-way. Variations exist only when a specific project or jurisdiction requires a different framing based on track structure or future plans.

Keeping a solid vertical clearance under railroad lines is essential to protect the duct bank from track vibration, ballast kick-up, and maintenance activities, while still leaving room for future access and modifications. The standard practice is to maintain at least 1.27 meters (about 4.16 feet) measured from the top of the rail down to the top of the duct. This depth provides enough separation from the moving track and ballast, helps prevent damage during rail operations, and aligns with common design guidance for railroad crossings and rights-of-way. Variations exist only when a specific project or jurisdiction requires a different framing based on track structure or future plans.

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