Method and apparatus for adjusting fiberglass manholes

A method for joining a first fiberglass manhole section to a second fiberglass manhole section, the method comprising:

• (a) attaching a self-centering lip around a face of the first fiberglass manhole section;
• and
• (b) placing the second fiberglass manhole section in tight contact with the self-centering lip.

A fiberglass manhole comprising:

• (a) at least two sections;
• and
• (b) a fiberglass manhole adjustment ring having at least one self-centering tightly contacting a longitudinal surface of the at least two sections, wherein the fiberglass manhole adjustment ring is positioned between the at least two sections.

A fiberglass manhole adjustment ring comprising:

• (a) a fiberglass pipe section having an inside surface, an outside surface, a first edge, and a second edge;
• and
• (b) a self-centering lip circumferentially attached to the fiberglass pipe section at the first edge, wherein the self-centering lip extends beyond the first edge of the fiberglass pipe section to a distance sufficient to withstand lateral forces.