calculating pipe strength required for a road crossing

[kr1114]

I am looking to see if anyone knows the calculation to calculate the pipe strength required when you have to cross beneath a roadway or railway tracks. For example I have a 6" HDPE DR17 (100 psi) pipe that needs to go beneath a set of tracks. The casing pipe has to be 12" but I am not sure of what the rating should be (i.e. DR17, DR13.5, DR11, etc). I know that the calculation has something to do with taking into account the depth of cover and the weight of that depth of cover including a standard weight that takes into account the weight of traffic.

 

[cvg]

do a google search for Cooper E-80 loading. You can probably download the Cooper loading from the railroad's website.

 

[Hoagie]

Check out "HDPE pipe Under Railway Loading" see page 4 of C/E engineering other topics area.

 

[scwaterguy]

Have you requested the permit application from the R&R company yet? Many times they will tell you what type and class casing pipe will be required.

 

[dicksewerrat]

Look up the Spangler formula.

Richard A. Cornelius, P.E.

http://WWW.amlinereast.com