Method and apparatus for forming a trench with grates or solid c

Details Method and apparatus for forming a trench with grates or solid c Method and apparatus for forming a trench with grates or solid c

1992-10-16

1994-07-05

Taylor, Dennis L.

Hydraulic and earth engineering

Fluid control, treatment, or containment

Flow control

249 9, 404 4, 405118, E02B 500

Patent

active

053261895

ABSTRACT:
A method and apparatus for forming a trench with grates or solid covers comprising an outer shell which is disposed between opposed frame members at a certain position, within a ditch and an inner core that is received within a channel in the shell. The core aids in providing rigidity to the shell while concrete hardens about the outer surface of the shell. After the concrete or other encasing material sets, the core can be removed from the shell which then enables the shell to be more easily displaced from the formed trench. One end of a core can project outwardly from an end of its shell so as to be received within the space formed in the rear of the channel of an abutting shell which, likewise, has its core projecting beyond its front end wall, thereby helping to align the shells within the trench.

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