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Author Topic: Storm cellar trap door  (Read 932 times)

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Offline trim4u2nv

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Storm cellar trap door
« on: September 05, 2012, 09:39:14 PM »
Rebuilding a 1844 porch with a trap door (flat) we would like to counterweight.  Has anyone else done this to make opening easier.  Size is 36 x 96 inches 2x6 framing topped with 3/4 inch pressure treated plywood and 5/4 x 6 PT deck boards.  Have already put on 3 web hinges on the narrow end rated 500 lb each.  We have 24 inches from the hinge to a stone wall to hang weights.  Current ideas are to use a steel cantilever arm and cable suspended disc (barbell) weights.  Have seen many jobs with gas shocks like you see mounted on a hatchback vehicle, but they seem to fail at the worst time.


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