LECT12
Structural
- Jul 3, 2008
- 17
In the Arema Manual for Railway Engineering commentary, it states that "The lateral deflection limits recommended are 50% of the FRA allowable limits for alignment deviation for Class 5 Track. Therefore, at least 50% of the allowable limit remains to account for variations in track alignment, rail wear and track fastener wear or movement."
My questions are:
Is the deflection limited to 50% of Class 5, even if I have Class 3 track?
If not, can I follow their metric and use 50% of class 3 allowable as specified by FRA?
Are these deflection limits applicable only for tracks-on-grade or can they be applied to tracks on elevated structure? (We are analyzing class 3 elevated tangent tracks)
I've looked at AREMA and FRA websites and have tried to find documentation that would answer my questions, but I have not found much. I'm hoping someone here can shed some light on this issue.
Thanks in advance.
My questions are:
Is the deflection limited to 50% of Class 5, even if I have Class 3 track?
If not, can I follow their metric and use 50% of class 3 allowable as specified by FRA?
Are these deflection limits applicable only for tracks-on-grade or can they be applied to tracks on elevated structure? (We are analyzing class 3 elevated tangent tracks)
I've looked at AREMA and FRA websites and have tried to find documentation that would answer my questions, but I have not found much. I'm hoping someone here can shed some light on this issue.
Thanks in advance.
