Movable stage platforms create crush, pinch, and collision hazards that static scenery does not. This article covers turntable and wagon design requirements, machine guarding, sensing edges, E-stop systems, pre-show checks, performer protection during automation, and lockout/tagout for maintenance.
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Electric chain hoists and motorized winch systems require strict adherence to ANSI E1.6-1 and ASME HST-4. This article covers entertainment vs. industrial hoists, WLL calculations, dual limit switches, E-stop requirements, performer flying (ANSI E1.43), and the annual inspection and load-test program.
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Not all chain is safe for overhead rigging. This article covers chain grades (80, 100, proof coil), why unmarked chain is retired, entertainment-rated vs. industrial hoists, load chain inspection and retirement criteria, sling angles, and the documentation program for chain in theatrical facilities.
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Rope is foundational to theatrical rigging and one of the most misunderstood materials in performing arts. This article covers rope construction, fiber types, working load limits, design factors, knot efficiency, visual and internal inspection, and the retirement criteria that keep crews safe.
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Comprehensive guide to safe stage lighting installation covering ANSI E1.4-1 counterweight systems, safety cables, load calculations, and inspection requirements.
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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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