![]() ![]() Sound familiar? - Believe it's true? - It absolutely is not!īy relying on tipping to signal a problem, an operator can overload a crane's structural components by a tremendous amount. The weight was over the chart, but we were in a tipping range, so I knew she'd get light before anything would break." How many times have you heard a conversation like this? "We had a heavy piece to lift. Beyond this point, however, a frightening number of users mistakenly read dangerous misinformation into the chart. This information is clearly indicated in some fashion on all rating charts. While some charts can be very complex, most crane users understand that a chart divides rated capacities into two general categories: (l) those limited by tipping (stability) and (2) those limited by structural factors. The rating chart for a mobile crane spells out operating parameters which are critical to the machine's safe use. ![]() Operating in the Twilight Zone of Crane Capacities This article was published in the November 1994 issue of Lifting & Transportation International Magazine. International rigging, lift supervision, rigging quizzes, rigging training, rigging book sales, Design of rigging software, rigging engineering, erection, guy derrick analysis,
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