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AASHTO Pedestrian Bridge Railing Requirements

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Good morning everyone,

Does anyone have access to the AASHTO Guide Specifications for Design of Pedestrian Bridges?  We have ordered the publication but with the holidays it won’t arrive in time to resolve our client’s question.


Is anyone willing to look up the requirements in the above publication for railings on a bridge intended to carry pedestrian and bicycle traffic only? 


AASHTO’s Standard Specifications for Highway Bridges, 16th edition, requires a minimum height of 54 inches and that the railing assembly such that a 6 inch sphere will not pass through any opening (between the riding surface and 27” above it) and an 8 inch sphere will not pass through any opening (27” above the riding surface).  AASHTO’s Guide for the Development of Bicycle Facilities, 1999, states only that railings should be a minimum of 42 inches high.


Thanks for your help.  Happy Thanksgiving to everyone.


Troy Madlem, P.E.