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In case anyone was wondering, I finally found it. In section 16.4.4.2.3, "Live loads shall be either the AASHTO HS-Series or the AASHTO Interstate Design truck loads." No mention of lane load.

No, the culvert is small. Are you saying that the decision of ASTM C1433 to check only the tandem and truck is because by inspection the lane load will not control?

Hello, I am running a structural design on a box culvert, and I have a question on live load application using the old AASHTO Standard Specifications 17th ed. (Yes, I realize that most places are using the LRFD specs now. But anyway...) The specs say that truck -or- tandem -or- lane should be...

I believe I had checked, but now I'm not sure. I will check when I get back to the office on Monday. Thanks, I'll let you know.

namklof and IDS, The most current version of Cande was released as part of NCHRP report 15-28. It is available for download here: http://144.171.11.40/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=408 Namklof, I ended up trying to do a level 3 analysis. The model passes the initial Cande...

IDS, another thing, you mentioned using other programs that can model the soil-structure interaction? Can you recommend a couple?

IDS, Thanks for the response. The issue is that I am trying to model 3-sided culvert with an arched top deck and arched elbows, but with straight legs. The analysis type I am using is Level 2. I can successfully model an arch culvert as well as a culvert with straight legs and deck, but the...

I am a structural engineer, trying to find some help with CANDE-2007. It is a FEA program designed to study soil-structure interaction with respect to culverts. It is a public-domain finite element program written to satisfy a FHWA grant, so I would expect to see some forums on the web. No...

Thanks Willis. Regarding those nodal rotations-if you fail to see why I would need them, the best way to find out is to ask!

Willis, Thanks for your response. The model definitely agrees with what you suggest is going on. Just out of curiosity, is this typical of most FE packages when modeling solid elements? Anyway, if I needed to get rotations of a node, it seems that the only way to do that would be to back...

Hi all, I am modeling the elastomeric bearing pad of a highway bridge. I am trying to apply a moment at the top-center of a rectangular solid element. The mesh is actually 2x2x9 length by width by depth. When I apply a moment load at that top center node and run the analysis, I get a...

I could use help with a similar designation. Can you give me the section properties for a 21 CB 122 beam? Specifically, I need the top flange width and thickness. Thanks