I have several questions and need clarification on several aspects of the load generation in LEAP Bridge for substructure design.
1. For WS, is the "barrier height" in the Geometry tab used for any other purpose besides determining WS? I want to use a larger barrier height to account for a fence or barrier-mounted wall, but I want to verify that this dimension isn't being used by LEAP for other purposes.
2. The 8th ed. of AASHTO requires different wind velocities for each load combination of STR/SVC. I do not see a way to set the Load Combination in LEAP when manually inputting WS. How is this done?
3. For DW loading from future wearing surface, does LEAP run an additional DW=0 load case to account for the lack of FWS or does this need to be configured by the user?
4. Both BR and WL do not provide inputs for tributary length when auto-generating the loads in the LL and WS tabs. It appears LEAP just assumes a length of 1/2 span 1 + 1/2 span 2 by default, which is incorrect in my case. How do you specify the tributary length for these loads?
5. Is there still a limit of 6 lanes for LL auto-generation? I read on another post on these forums that there was a 6 lane limit on LL and BR auto-generated loads. I have a bridge with a clear roadway width of 85.25', so I can fit in 7 lanes @ 12' wide. The LEAP output report for "Superstructure Info" indicates my model has 7 lanes. However, the model itself and all load cases only show up to 6 lanes being loaded. And lastly, the output report for "Live Loading" indicates I only have 5 lanes being loaded. I'm very confused by what LEAP is doing with LL lanes. Can you clarify? Is there a bug in the computation?
3. Leap does not run an additional DW =0 load case to account for the lack of fws and the user has to create a new load case considering the above mentioned case