A lot of pipe specs I see for smooth outside pipes limit the maximum slope to 10%. I'd go with a corrugated outside pipe steeper than 10%. Then you could get back to soil to soil friction as the soil fills the corrugations.
You'll need to consider hydraulic issues with pipes sloped more than...
most municipalities in Georgia require them to be placed on 0.5 percent slope, but I agree flat is best and will yield more storage volume.
For systems like the chambers and perforated pipe that store water in the #57 or #4 stone voids I always lay the pipes and chambers flat. There's a 6 inch...
It depends. Is it really plastic or is it a thick coating of asphalt? I hope it's the plastic since the asphalt coatings wear off over time, typically in less than 20 years.
The main reasons for coating steel are to (1) protect against pH effects of soil and water and (2) protect against...
It sounds like you have 2 different tasks. Creating a life cycle analysis is typically done considering new pipes. If you have existing pipes that have deterioration are you wanting to determine the remaining service life for the pipe? If so, there are published guidelines from the FHWA for...
