Understanding ANSI B11.0 - 2023 Two-Hand Trip Devices in Film and TV Production

When it comes to safety in film and television production, understanding and correctly implementing the standards like ANSI B11.0 - 2023 is crucial. The Two-Hand Trip Device (THTD) outlined in section 3.15.13 of this standard is often misunderstood or misapplied in production environments. This device requires simultaneous operation by both hands to initiate hazardous machine functions, but it's important to know its limitations.

Common Misunderstandings in Film and TV Production:

One common mistake is assuming that THTDs provide comprehensive safety for all personnel on set. In reality, as the standard notes, these devices only offer risk reduction for the person operating the control. This means that while the operator might be safer, others nearby could still be at risk. I've seen cases where production crews thought they were fully compliant by using a THTD, only to find out during safety audits that additional measures were needed for the entire team.

Real-World Scenarios and Safety Implications

During a film shoot I consulted on, the crew used a THTD for a guillotine prop. The operator was safe, but the device did nothing to protect the actors and other crew members near the machine. This oversight could have led to serious accidents if not caught and addressed. Based on available research, individual results may vary, but it's clear that relying solely on THTDs without considering the broader safety context can be a significant error.

Another scenario involved a special effects team using a THTD for a pyrotechnics setup. The device was correctly used to initiate the effect, but the safety of bystanders and the continuity of the shot were not considered. This not only compromised safety but also the quality of the production.

Best Practices for Implementing THTDs in Production

To ensure safety and compliance with ANSI B11.0 - 2023, consider these best practices:

• Comprehensive Risk Assessment: Conduct a thorough risk assessment that goes beyond the operator to include all personnel and potential hazards on set.
• Supplementary Safety Measures: Implement additional safety controls like barriers, warning signals, and training for all crew members to ensure comprehensive protection.
• Regular Training and Audits: Regularly train your team on the correct use of THTDs and conduct safety audits to ensure ongoing compliance and awareness.

By understanding the limitations of Two-Hand Trip Devices and integrating them into a broader safety strategy, film and television productions can enhance their safety protocols. For further guidance, resources like the American National Standards Institute provide detailed information on safety standards and their applications.