2009 - Volume #33, Issue #1, Page #41[ Sample Stories From This Issue | List of All Stories In This Issue | Print this story | Read this issue]
Easy-Open "Pit door"
The system is simple and balances the door perfectly. A length of 3/16-in. cable connects to the door and to a pipe that's set 3 ft. in the ground with concrete around the base. There's a 20-in. long, 4-in. dia. shaft weighing 78 lbs. inside the pipe with a pulley welded on top of it. The cable runs up through a slot in the pipe and over a pulley attached to the cap on the pipe, and then under the pulley on top of the counterweight.
My only cost was $12 for the 3/16-in. cable. (Jerry Stevenson, 56680 295th Ave., Chariton, Iowa 50049)
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