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Safely manage point loads from lights and scenery in theatre rigging with ANSI E1.4-1's 100 lb mid-span rule and bending/shear formulas. This expanded guide delivers calculations, examples, inspections, and ETCP best practices for failure-proof hangs.
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Working Load Limit is the maximum load permitted under normal operating conditions. It is not a proximity to failure. Using breaking strength to justify a rigging decision reflects a fundamental misunderstanding of how design factors function and exposes personnel, equipment, and institutions to preventable catastrophic risk.
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