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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 These now outdated single-bottom cylinders were the industry-standard until 1971 when codes began to require going to Double-Bottom.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!

Warm weather means additional jobs for D & D Elevator

By: Judy Uliano

Warm weather means additional jobs are blooming for D & D!


A Westchester luxury, gated condo/cooperative, located in the Village hamlet of Tuckahoe,  has awarded D & D the modernization of their elevator equipment.  This high end location was built in 1974 and with the elevator equipment 40+ years old it was time for an upgrade.  The four (4) units will be totally “moded” with new controllers, brakes, fixtures, etc.  These are hydro units with 5 stops, 5 openings, 1500 pounds, 100 FPM.

This regal residential complex, located in Westchester County, made a decision to modernize the 50 + year old elevator equipment and has given D & D the job.  We will be upgrading the original two (2) overhead traction units with new controllers, machines, cabs, bronze fixtures, and many added ADA necessities.  They are 7 stops, 7 openings, 2000 pound units.

This fashionable, private balcony residential building located near Van Cortlandt Park neighborhood was in need of upgrading their original 30+ year old overhead traction elevator.  With this modernization of the elevator it will continue to attract the fashionable residents that are looking to relocate.  This complete modernization of the controller, machine, fixtures, etc. will include a new cab interior and fixtures.  This traction elevator is 7 stops, 7 openings, 2000 pounds, 100 FPM.

D & D was awarded this construction job for a new public facility in Rockland.  The architect, who designed the new building, spec’d out a new a holeless hydraulic elevator which fit the buildings needs and will consist of 4 stops, 4 openings, 2000 pounds and run at 100 FPM. 

A combination business/private residential building with plenty of sun and balconies needed a modernization on their 35+ year old elevator equipment.  The building is not only modernizing the controller, machine, motor, and fixtures, etc. and we will install a new cab interior for their private residents.  This is an overhead traction elevator is 2000 pounds, 100 FPM, 7 stops, with 7 openings.

An old retail space, located in the New York county area, was in desperate need of modernizing their 50+year old copper relay freight elevator and awarded it to  D & D Elevator.  We will be putting in a new controller, machine, fixtures, doors/entrances and will renovate the cab interior, all of this will attract new retail business to this location.  The overhead traction elevator will continue to have 5 stops, 5 openings, 2500 pounds and run at 150 FPM.

Two large private, luxurious, residential complexes need to modernize their six elevators and awarded D & D Elevator the job.  These two buildings are located in the Bronx area and were originally installed in 1999.  D & D will be replacing the overhead traction elevators with new controllers, machines, fixtures and revamping the cab interiors for a more update look.  These units are 22 stops, 2500 pounds each, and run at 300 FPM.


‘Tis the Season to… Prepare your Elevators for Winter!

By: D&D Elevator

Clean Elevator Door Tracks

Keeping your elevator door sill tracks clean year-round – both on the car and hall sides – is always best practice to help prevent problems and unnecessary calls for service. But it is particularly important at this time of year, when clogging by packed snow, ice, salt, pine needles from holiday trees and all manner of dirt can severely aggravate the situation and create door-opening and closing issues.

Elevators are typically subject to heavy traffic and accumulation of debris in their door sill tracks. While service contracts typically specify regular cleaning by building management of these tracks, this task is often overlooked. Many commercial cleaning personnel are either unaware or unwilling to clean this area. Although tracks are actually quite simple to clean, many cleaners skip doing so out of failure to notice the amount of debris in the tracks and or avoiding the buzzing noise made by the elevator when the doors are held open.

Cleaning elevator tracks typically involves spraying a suitable metal cleansing compound directly onto the track, then wiping side to side until the dirt and debris are cleared. Stiff paint brushes and high pressure computer compressed-air cans may be useful for removing track obstructions. Also available to facilitate this process are specialty brushes filled with “tiger claw” steel wire, crimped and oil- tempered especially for cleaning and scraping metal parts.

Whatever methods you may choose, be sure to heighten your attention to these vital parts of your elevators as winter brings with it the increased necessity to properly maintain your door sill tracks.

Car Side Track, Hall Side Track

Prepare for Harsh Weather & Major Storms

During winter, check to ensure that the motor room is properly heated – ideally to at least 70 degrees – to avoid the congealing of fluids. If your location is prone to flooding, and a severe storm is on the way, several proactive steps – taken before the storm – can avoid serious problems and downtime resulting from weather damage:

  • Check the condition of the pits and make sure that sump pumps are functional and not clogged.
  • Close any vents and openings atop the hoistway to keep water out of the shaft.
  • During potential flood conditions, position the cars at the top floors and shut down the system and power, making sure there are no remaining building occupants dependent on the elevators to vacate.
  • In severe flooding areas, barricade the motor room to prevent, best as possible, entry by major amounts of water.

As always, D&D stands ready to assist with any seasonal difficulties you may encounter, but some common-sense preventative maintenance can go a long way toward avoiding trouble!

Be prepared for flooding