Powerlines and Cranes – A Deadly Combination

It’s hard to imagine life without electricity. We flip a switch and things start working. It powers your lights, television, refrigerator, air conditioner and so much more. Powerlines deliver electricity to our homes and offices and don’t seem dangerous because they are normally mounted up high and out of reach. The truth is, they have […]

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Sling Angles do Matter!

One of the most overlooked considerations when designing a rigging system is sling angles. When slings are used in a bridle at an angle, the angle increases the force applied to each sling and the rigging hardware such as shackles, spreader bars, links and collector rings. The illustration below clearly shows the effect of specific […]

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Crane Bridge Design

The CMAA Standard for Cranes: Becht Engineering recently completed the structural analysis for a single girder 5-ton crane bridge with an under-running hoist per CMAA-74 for nuclear waste handling operations.  CMAA is the Crane Manufacturers Association of America, and CMAA-74 is the Specification for Top Running and Under Running Single Girder Electric Traveling Cranes Utilizing […]

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