Is anyone aware of guidelines for spacing of multiple-leg bearing stiffeners for plate girders? I would think that there would be minimum spacing requirements from a fabrication point of view, and perhaps a maximum spacing requirement from a design point of view. However, AASHTO does not appear...
I'm working on the design of a three-span bridge using full-depth precast concrete deck panels on steel beams.
I plan on using longitudinal post-tensioning in the deck panels to to resist the effects of negative moment at the piers.
I believe that I have properly designed the strands under...
I have a client who, as part of a bridge repair project, would like to have the aluminum railings cleaned and/or coated.
The railings are constructed of uncoated aluminum, either 6061-T6 or 6351-T5. They are approximately 50 years old. The client would like to remove the heavy layer of...
Section 3.28 of the AASHTO Standard Specifications defines the methods for calculating the live load distribution factor for a prestressed concrete spread box beam superstructure.
Equation 3-33 of this section consists of a number of variables, two of which have defined upper and lower bounds...
