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Rail Systems
Urban Areas
Rural Areas
Remote Areas
Curbs
Timber

Rail Systems

Curbs

Not all trail bridges require rail systems. The designer should conduct an analysis of the bridge and determine whether a rail system is truly required or whether a curb could be installed instead. For example, if an analysis shows that the potential hazards along the trail are the same as or greater than the hazards of a bridge without a rail system, curbs may be used. The use of a curb to replace a rail system should be well documented and included in the design folder for the trail bridge. All trail bridges that do not have a rail system must have a curb.

Drawing of a curb system bridge.
Click image to enlarge


Timber

Timber-Log

Additional Pictures:

Standard Drawings/Design Aids:
Multiple Log Stringer R1921-3

Example sketch of a log timber curb
Photo of a Log Timber Curbs Photo of a Log Timber Curbs
ROS Classes: black from U to R to RN to SPM to SPNM to P

Timber-Sawn

Additional Pictures:

Standard Drawings/Design Aids:
Multiple Log Stringer R1921-3

Example sketch of a sawn timber curb
Photo of a Sawn Timber Curb Photo of a Sawn Timber Curb
ROS Classes: black from U to R to RN to SPM to SPNM, gray from SPNM to P