Elevator Door Lock Monitoring (DLM): What you need to know!

Elevator safety is a top priority for building owners and facility managers. One critical safety feature that has gained prominence in recent years is Elevator Door Lock Monitoring (DLM). DLM is a system designed to monitor the status of an elevator’s door locks to ensure they are secure before the elevator car moves.

The Bureau of Elevator Safety has recently implemented new standards, including Section 3.10 of the ASME Elevator Safety Code A17.3-2015. One crucial aspect of this code is Requirement 3.10.12, which mandates the installation of a system to monitor and prevent the automatic operation of the elevator with faulty door contact circuits.

This article explores what door lock monitoring is, when it needs to be installed, and its costs, providing a comprehensive overview for those considering this essential safety upgrade.

What is Door Lock Monitoring?

Door Lock Monitoring (DLM) is a safety feature that ensures the elevator doors are securely closed and locked before the elevator car can move. It involves installing sensors and monitoring systems that detect whether the elevator doors are fully closed and locked. If the doors are not properly secured, the system prevents the elevator from moving, thereby reducing the risk of accidents.

DLM systems work by continuously monitoring the status of the door locks and providing real-time feedback to the elevator control system. If a door is not fully closed or locked, the system alerts the elevator control, which then takes action to prevent the elevator from moving. This safety feature is especially important in high-traffic buildings, where elevators are frequently used and the risk of door-related accidents is higher.

Man sticking hand in closing elevator door

When Do I Need to Install Door Lock Monitoring?

Time is of the essence. By January 2024 (Extension till August 2025), all elevators must be equipped with Door Lock Monitoring systems to comply with safety regulations. Failure to act may lead to long material lead times, violations, and increased pricing due to a backlog of last-minute installations by vendors. The need to install Door Lock Monitoring depends on several factors, including building codes, the age of the elevator, and the building’s traffic volume. Here are some scenarios where DLM installation might be necessary:

1. Compliance with Updated Codes: In many regions, elevator safety codes have been updated to require DLM systems in certain types of buildings. For example, the American Society of Mechanical Engineers (ASME) A17.1/CSA B44 Safety Code for Elevators and Escalators has mandated DLM for new installations and certain modernization projects. If your building is undergoing renovation or you are installing a new elevator, you may be required by law to include DLM.

   
   

2. Modernization of Older Elevators: Older elevators, especially those installed before the current safety standards were established, may not have DLM systems. Upgrading these elevators with DLM can enhance safety and bring them up to code. This is particularly important in buildings with high passenger traffic or in settings such as hospitals and schools, where safety is paramount.

   
   

3. Insurance and Liability Concerns: Some insurance companies may require DLM as part of their coverage terms. Even if it is not legally required, installing DLM can reduce liability risks associated with elevator accidents and might lower insurance premiums.

Cost of Door Lock Monitoring

The cost of installing Door Lock Monitoring (DLM) varies based on several factors, including the type of elevator and the system being installed. Generally, there are two main options to consider:

1. Comprehensive Modernization: This option typically costs between $20,000 and $60,000 per elevator. While it is a more expensive investment upfront, it provides a long-term solution that reduces future maintenance needs and minimizes the risk of costly downtime. This solution ensures your elevators remain compliant with safety standards and operate efficiently for many years.

   
   

2. Basic Retrofit: A cheaper, short-term solution that can range from $8,000 to $15,000 per elevator. Although this option helps meet immediate compliance requirements, it acts as a Band-Aid fix and might lead to higher costs over time due to increased maintenance needs and potential equipment failures. If the retrofit proves insufficient, a full modernization may still be required, making this choice potentially more expensive in the long run.

Conclusion

Elevator Door Lock Monitoring is a crucial safety feature that helps prevent accidents and ensures compliance with modern safety standards. Whether you are managing a high-traffic commercial building or modernizing an older residential elevator, installing DLM can provide peace of mind and enhance the overall safety of your building.

For building owners and managers in Central Florida, Alto Elevator offers top-notch door lock monitoring modernizations. Don’t wait until the last minute to comply with the 2024 regulations—contact Alto Elevator today to ensure your elevators are safe, compliant, and ready for the future. With Alto Elevator, you can count on expert installations, minimal downtime, and a team dedicated to keeping your building's elevators operating safely and efficiently. Make the smart choice for your building's safety today!