How to calculate parapet loading for bridge when equal distribution not possible?

[DK1614]

I am reviewing the parapet loading requirement for a steel girder concrete deck bridge and had a question regarding load distribution. 

Reviewing the uniform application of dead load requirement in AASHTO (Section 4.6.2.2.1 and Section 4.6.1.2.4b), the parapet loading will not be equally distributed among all the girders since the bearing lines of the curved girders that I am designing are skewed more than 10 degrees from radial.

AASHTO only says to use engineering judgement if the criteria for equal distribution is not satisfied.

Has anyone come across this situation before? How much additional parapet loading should be added to the exterior girder, if any?

 

[KootK]

I recommend moving your thread to the Bridge Engineering forum: Bridge Engineering. We have some excellent bridge guys and gals here but they mostly just monitor that one forum, lying in wait for a neat bridge question to help out with. It's a bit cleaner for our internal filing system that way too.

 

[DK1614]

Ok, will do that. Thanks!