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[TowerTalk] Gin Pole Strength

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Subject: [TowerTalk] Gin Pole Strength
From: kn6di@groupone.net (Dan Arney)
Date: Sat, 03 Apr 1999 03:05:58 -0800
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Guys, A week ago I removed a LM-470 tower with a crane with a 140'
boom/jib combo. We did not use the jib. Boomed out to 110' adjacent to
the tower, I hooked onto the hook with a body suit, tool belt, tools and
chokers. The scale read 0 before I hooked on, after hooking on it read
285 with me clear of the ground for a lift check. Up and away to remove
the KT-34XA. When it came free the weight increased about 140/160 pounds
due to wind , moving etc. When we lifted the tower, motor, winch,
brackets and a 20' 4130 mast the scale read 1650# on the crane at the
operators position. This is read by the total weight on the cable/boom
after it is zeroed at the boom extension and angle as it is very
important to know what weight you are lifting at the reach and angle to
prevent tilt over. At the 1650# we were at 80% of capacity, so if it had
been 3300# we would have tilted over onto the garage with the boom. He
can go to 125% of lift after overriding the 100% alarm.
Somebody tell me where the other 1659# went while we were lifting.
This apples /apples , not apples/oranges/ pears as the way I see it.
Yes the weight of the cable and ball/hook is included in tare weight of
the lift.
We were up on a hill in the Valley and did I have a great view.  SFV
that is.
Flame away just put on the Nomex, crane is on its way to lift me above
the flames Hi.
Hank


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