I have recently been given a job that entails making a bridge for the forest service and they asked to use the design trucks U80, U100, and U105. I can find the design loads for U80 and U102 but cannot find the load distribution for U100 or U105. Also the distribution for U80 and U102 are...
So what is the actual point of the knee braces for the underhung floor beams? They attach the floor beams to the verticals, but what positive effect does that actually have on the system?
Thank you for the replies, I had already looked through AASHTO so I know what need to be checked. I guess my real question is about knee braces and how they actually brace the system and interact with the normal pony truss spring constant (stiffness) equation. Do you know anything about that?
Does anyone know a good book or website for help on designing knee braces, or their effect on top chord stability? I have Stability Design Criteria by Galambos but it only mentions knee braces. Another question is does anyone know where I could find a way to calculate the top chord stability...
