Re: 15\" X 20\' culvert
I recently installed a 10 inch x 40 ft. culvert. I used a steel culvert to cross my drive and attached a plastic one to reach a ditch 20 ft away. I don't know what brand they were, I just saw culverts advertised in the yellow pages and went to look at them. I used steel to cross the road because I knew that I could only put 4 inches of chert on top of it and I was afraid that plastic would not be strong enough being that shallow. The plastic pipe had a "bell" on one end which fit perfectly over the metal culvert. I had to do a little grinding on the ragged edges first, but it worked fine. I have another all metal culvert with two 20 ft. sections. I just wrapped some sheet metal around those to make a connection. They probably make some kind of sleeve for that purpose but I have never seen one.