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Underfloor Systems - Plug-In Type  Engwald Plug-In Twin Units U-60-PT, PTH, PTX Units Dimensions of units are on the following page All diagrams are not to scale Construction Part 1 - Cast aluminum frame with beveled edges Part 2 - Cast aluminum reinforced self closing lid Part 3 - Cast aluminum support plate Part 4 - 3/16 stainless steel hinge pin Part 5 - Cadmium plated spring Part 6 - 22 gage galvanized steel transition coated with bituminous paint 90° couplings made out of 3" = neoprene 4" = cast aluminum 5" & 6" = 18 gage material All straight couplings made out of 18 gage material.   |
