I haven't found a thread for pipe loads so I thought I'd start one. Here's an article I found. It shows an idea for making pipe loads and culverts. I thought it was worth sharing. http://modeltrains.about.com/od/scratchbuilding/ss/Making-Scale-Pipe.htm#step3
It really is an ingenious and simple method for making corrugated pipe. I agree with Joe, thanks, for positing. Terry
Instead of white glue at the seam you might try a thin strip of the Micro-scale metal foil adhesive at the seam, also Heavy Duty foil wont tear as easy at the threads. I have used this system many times when rolled you can spray the culvert with a cold galvanizing compound, one can is a lifetime supply. They really look good. Have fun!