Elevator Renovation

D&D Blog

Changes Required: Elevator Door Monitoring for Automatic Elevators

By: D&D Elevator

Door monitoring equipment is made by various OEM’s and independent manufacturers; the examples below are by 
(A) Rolls Elevator Safety
(B) Electrodyn


FSSG Fail Safe Safety Guard


The New York City Department of Buildings has announced that, by January 1, 2020, all automatic passenger, service and freight elevators must provide a system to monitor and prevent automatic operation with faulty door contact circuits. All controller modifications performed to meet this mandate will require an Elevator Application under an EBN (Elevator Buildings Notice) and all modifications must be approved by a Registered Professional Engineer, Registered Architect and the controller manufacturer. The requirement is to prevent the elevator from operating under any circumstance with the hoistway or cab doors open; this is to eliminate the possibility of passengers becoming entrapped between the doors and injured if the elevator moves away from the landing floor. Passenger or service elevators with manually operated doors and gates are by definition exempt.

Depending on the age of the elevator, the equipment may require modifications to the existing controller system or upgrade/replacement. Controllers meeting the A17.1-2000 Code almost certainly have the door lock monitoring provisions built in, but, depending on the controller manufacturer, it is best to check to make absolutely sure. Most probably controllers that were installed prior to having met 1996 requirements, or microprocessor controlled systems older than 18 years, will need a full modernization of the equipment. Owners of buildings with relatively recent elevator installations may be able to comply with this code requirement simply by adding certain software/hardware to the existing relay logic/microprocessor controller; in most cases, the microprocessor and relay controllers will require the addition and wiring in of a panel with solid state boards and relays.


Electrodyne Monidor

After January 1, 2020, non-compliant systems may be subject to violations, clearly a situation to avoid. It is best to start planning now or at the least very soon, since, in the case of multiple elevators, it could take up to two years or more to specify, complete and obtain approval of a full modernization. In no case should this work be scheduled later than in 2018, especially since there will be widespread demand for this service, and more limited ability to provide it, as the 2020 deadline approaches.

The experts at D&D Elevator stand ready to help you to evaluate your particular needs, sort smoothly through the complexities of this code requirement – achieve safety and code-compliance – and boost your peace-of-mind!

Stuck In An Elevator? Do It Right: Sit Tight!

By: D&D Elevator

stuck in elevatorWhen people are riding an elevator, and it lurches to a stop between floors, often the initial gut response is to panic – especially among those who are claustrophobic – and what to do to most quickly to get out. Publicly-available accounts and data show that escape attempts can result in severe injury, sometimes fatal; for example, during a recent year, New York City’s Department of Buildings reported that 51 people were injured and five died when trapped riders tried to save themselves.

Municipal governments are undertaking campaigns to educate the riding public to the proper procedures during entrapment, such as New York City’s “Stay Safe - Stay Put” public awareness campaign – using broadcast ads, print ads, bus shelter messages and a public service video – to encourage riders to remain in stalled cars and wait for help,

As a service to building owners and managers, and other D&D Elevator Maintenance customers, D&D has prepared a comprehensive Safety Guide for Entrapped Passengers, which may be viewed online here and printed as a hard copy for provision to superintendents, co-op/condo boards, etc., for their review and appropriate distribution to tenants.

Download Elevator Safety Guide - 50 kb pdf

Time for a Cylinder Upgrade!

By: D&D Elevator

Cylinder Replacements

Courtesy: Vertical Express

If today you are operating hydraulic elevators with Single-Bottom-Cylinders, this stands in violation of various state and city codes, as well as the requirements of ASME A 17.1-2000. For several years now, code requirements have called for the use of Double Bottom Cylinders and the replacement of older single bottom installations. These now outdated single-bottom cylinders were the industry-standard until 1971 when codes began to require going to Double-Bottom. Operating with Single-Bottom-Cylinders is risky, dangerous, environmentally unsound and inviting all manner of trouble.

And for good reason: Single-Bottom-Cylinders, by nature of their design, invite the possibility of catastrophic failure in the event that the bottom plate should rupture. Since these cylinders are positioned underground, below pit level, they are subject to sometimes harsh conditions leading to electrolysis and corrosion, which in turn can lead to fluid leaks. Leaking oil leaches into the environment and impacts the performance of the elevator, including possible sudden uncontrolled, downward lurching of the cab. In past years, numerous injuries and even fatalities have been reported as the result of such failures.

Single Bottom Cylinders
Courtesy: Elevator World

Alternatively, Double-Bottom Cylinders protect against bottom plate failures and ameliorate such hazards; these feature – in addition to the bottom plate – a bulkhead inside the cylinder, fashioned with a small opening allowing only a small amount of hydraulic fluid to escape, thereby reducing the risk associated with rapid downward descent of the cab. Today’s code also requires double-bottomed cylinders to be surrounded by PVC encasements, to ward off electrolysis and corrosion; this not only serves to protect the environment but also helps the property owner avoid unpredictable future downtime and expense for remediation of serious problems.

Bottom line, any Single-Bottom-Cylinders remaining in operation at this late date should be upgraded as immediately as possible, to head off a possible catastrophic failure – one which could be potentially and extremely expensive in terms of dollars, downtime and liability. The experts at D&D Elevator stand ready to help you to achieve code-compliance and boost your peace-of-mind!