Sewer Sense No. 11
by NCPI, 7/1/1981
Engineers-is More or Less Better? This article describes the difference between deflection theory and reality. The deflection graph shows ASTM D3034 DR 35 pipe exceeding 5% deflection. Article also contains a new deflection method from the US Bureau showing that the installation is greatly affected by the compaction achieved around the pipe. Specify the best - pay less. E. J. Newbould describing costs for sewer lines installed between 1973 and 1979 show clay pipe not only to be the dominant sewer pipe but also the least costly to be installed. General Motors Plant in Pullman Illinois near the south side of Chicago was installed in 1890s. It has used several kinds of industrial wastes as the ownership has changed. Today the 24in. lines still functioning properly. Two towns in IN, Mt. Summit and Sulpher Springs join together to install a clay pipe sewer system because the septic systems in the area were failing. Although PVC ABS composite were specified VCP was used because it had a no-bell joint and pipe would have a long service life. Blair and Miller receive NCPI Awards. Mr. Blair was president of Kelly Gidley, Blair and Wolfe, Inc. Consultants. Mr. Miller was acting Assist. Dir. of the Bureau of Water Quality Control of the State of Arizona.