The Profile Design of Sewer System

The vertical profile is drawn from the survey notes for each sewer line. Longitudinal section is indicated with reference to the same datum line. The vertical scale of the longitudinal sections are usually magnified ten times the horizontal scale. The profile shows ground surface, tentative manhole locations, grade, size and material of pipe, ground and invert levels and extent of concrete protection etc. At each manhole the surface elevation, the elevation of sewer invert entering and leaving the manhole, are generally listed. Figure 2 describes the profile of a typical sanitary sewer.