Gravity Sanitary Sewer Pipe Type Help
Gravity Sanitary Sewer Pipe Type Help
(OP)
Hello everyone,
I've designed quite a bit of sewer, but it's all been pretty bland. I am looking at a new sewer main that will have 30 ft of cover, and on top of that railroad spurs. I've always used SDR 35 in the past, but could use some direction on the proper material for this application. The railroad people want something that will last forever so that their spurs don't have to be ripped up to fix or replace a sewer line.
Thanks.
I've designed quite a bit of sewer, but it's all been pretty bland. I am looking at a new sewer main that will have 30 ft of cover, and on top of that railroad spurs. I've always used SDR 35 in the past, but could use some direction on the proper material for this application. The railroad people want something that will last forever so that their spurs don't have to be ripped up to fix or replace a sewer line.
Thanks.





RE: Gravity Sanitary Sewer Pipe Type Help
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Gravity Sanitary Sewer Pipe Type Help
RE: Gravity Sanitary Sewer Pipe Type Help
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Gravity Sanitary Sewer Pipe Type Help
RE: Gravity Sanitary Sewer Pipe Type Help
You will have a Contract with the railroad. Follow what is in the Contract. Most railroads have standards for crossing rails too.
Casing may run several hundred feet, so your position on casing does not make sense.
RE: Gravity Sanitary Sewer Pipe Type Help
The material is the same, PVC. PVC will have a very long service life if installed properly.
Use SDR26 (or 21) and make sure that your specs are correct for the compactive effort required. 100% construction observation should be required.
As bimr notes, it is not a bad idea to use SDR26 as a mminimum anyway due to constructability and handling. I had one site contractor tell me that they used SDR26 even if the plans called for SDR35 because the small additional cost was worth it.
RE: Gravity Sanitary Sewer Pipe Type Help
Make sure the railroad is on board with what ever you propose, but consider this: At 30' deep the cost of materials is realitively small. The cost of replacing a pipe below rails is quite significant. Dont skimp on the mateirals. If it's not cased, I'd consider DIP, bagged with HDPE & ceramic epoxy interior liner (Protecto 401 or similar). If they dont like DIP, C-900/905 DR-14 would be my second choice.