Tru-Contour offers 4' and 5' inside diameter
manholes. All are designed and manufactured
to meet or exceed the most stringent industry
standards. These standards include and are not
limited to ASTM C478 and DOT requirements.
Manholes are wet cast in precision steel forms
with integrally cast base sections. Pipe to man-
hole connections are placed as required.
Top sections are typically cast as a cone or flat
slab with appropriate openings.

Watertight pipe to manhole seals manufactured
by NPC boots or A-LOK gaskets.

Orange steps supplied by MA Industries for higher
safety standards secured by cast in step inserts.

Precast concrete channels for laminar flow between
pipes formed by the highly dependable Tru-Contour
Invert Forming System.

For complete details, Our product catalogs and
brochures are available upon request. We also
offer CAD drawings of our products.