To Graybeach: Yes, the bridge will have a composite deck. The existing bridge, which we are replacing, is a non-composite deck. As you alluded to, non-composite adjacent box beam bridges seem to run into problems in terms of redundancy and drainage issues. We feel the new composite deck will...
I am designing a simply supported adjacent box beam bridge. The bridge is a replacement for an existing bridge which is only 16 ft wide (one design lane). So the design is for 4 box beams all 48" wide.
The problem I'm running into is in Section 4.6.2.2.2 in AASHTO/DM-4 which provides...
I am new to bridge design and am using the PennDOT program PSLRFD to design a simply supported, adjacent box beam bridge. My spans are only 40' long. My deck is only 16' wide out-to-out, so I only need 4 box beams. There is no skew and no elevation differences. Pretty straight forward in...
Thank you for your response. You were correct, my bridge is an adjacent box beam structure. I am also designing it as a composite deck. So just to be clear, are you saying that because it's composite, that I should distribute my pedestrian live load equally to all 4 girders? This seems...
I am new to structural bridge design. I have been tasked to design the replacement for an existing adjacent box beam bridge. I am using PennDot's PSLRFD design software. Within the "PLD - Pedestrian Live Load Command" tab, the program asks for the portion of the ped live load that is acting...
