huangyhg

type "s" dump truck loading on bridge
yes, the question is elementary, but alas a solution is at hand. if you don't want to pull out your old structural analysis text or, god forbid, your statics book, then take out your aisc standard specifications and look in the section where the beam formulas are. there is a section on truck loads and positioning for maximum moment on...a simple beam!
i would recommend that you do some more investigation and determine what, if any, lane load exist. as you are probably aware a concentrated load accompanies the lane load. a single for maximum positive moment and two concentrated loads for maximum negative. the latter, of course, you won't need to bother with. the former may be of some interest depending on the values as it may exceed the truck loading. i would try
qshake...that would be
you know your loads and your spacings. use your influence diagrams.
visitor (visitor)22 feb 02 9:33
analysis of multiple moving loads and the position of max moment..etc was not the question in the original post.
the thread was initiated as one of the steps in trying to find out if there is a lane load for this truck.
no answer is better than a non-answer
yo visitor, if you could read at all you will note that in the beginning of the third paragraph (re
oh wait...vistor, you are the original poster. i guess then i must amend my last comment. you need to better communicate what exactly you wish to know. in reading your post "how do you apply this load" and "do you put one truck in the middle..." reads an awful lot like you're asking how to apply the truck load. which incidently is not placed in the middle of the span to effect the maximum moment!
later in the post in that paragraph you introduce the lane load for the type 3 truck.
i did get the website incorrect. i suggest that you check out
no, your right, a direct answer has not been given. however, several suggestions were made and the correct address given to the fhwa website where there are phone numbers listed in case the subject matter (lane load) is not given directly.
if you've phoned and looked up the fhwa document that explains the type s (or 3) truck at the fhwa publication website and still haven't found an answer...maybe your client knows.

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