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Unread 05-02-2012, 22:01
jdunston94 jdunston94 is offline
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Re: Forced needed to get on Bridge

Quote:
Originally Posted by Alan Anderson View Post
With an extra 160 pounds of concrete blocks mounted underneath the deck, our wooden bridge now passes the "two battery" test.
instead of putting aton of uneeded weight on the underside of the bridge we just put surgical tubing


and it is right around 18lbs of force perpendicular to the bridge to push it down
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