Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Arched – domed – or vertical-cylindrical structure
Patent
1989-10-02
1991-03-05
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
Arched, domed, or vertical-cylindrical structure
249 10, 249184, 264 33, 264 34, 264 35, 264 36, 264219, 264254, 264256, 264269, 425 63, B28B 116, B28B 728, E02D 2912, E02D 3700
Patent
active
049976028
ABSTRACT:
A collection of sheet-metal, flanged, arcuate panels is provided which panels can be assembled in belts of generally circular cross-section commencing from the bottom of the manhole to provide a complete form structure for casting a concrete liner with a minimum thickness of about three inches and including openings created by sectional cylindrical inserts, all of which can be assembled, then disassembled after the concrete liner has set. An extensive variety of panels to accomodate different shapes of manholes includes panels for forming right conical belts, for forming offset conical belts, and for forming wedge-shaped belts to make transitions between vertical and tilted sections of the manhole. A key-panel for these various belts is provided to prevent capture of the panels by the poured concrete liners which includes a relatively narrow portion with vertical flanges fixed at an angle to one another which angle diverges toward the center of the form structure. The methods include jacking the form structure after a part of the liner has been formed and poured to cause it to fit relative to the manhole and inlet pipes into the manhole, before pouring the remainder of the liner.
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Action Products Co., Action Products Sales Flyer, 1985, pp. 1-4.
Action Products Marketing Corporation
Kutach Karen D.
Silbaugh Jan H.
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