Three Basic Classifications of Elevator II


The hydraulic elevator or the “hydro,” comes in two basic styles. The rule of thumb here is that the piston will not be longer than five to seven stories in height. The piston has two styles, say, solid and telescopic, depending on what’s in the ground. The telescopic is used in areas with a shallow water table, tunnels below, ledge in the ground and things of that nature. The “pump” room can be next to the shaft way or many yards away and in some cases, even on different floors all together.

The freight elevator has five classes, but again for this article, we will discuss the basics. A true freight elevator will usually be of the geared traction style. The doorway at the hoistway will have the tell tale signs of the vertical bi-parting doors.

The residential elevator, or “swing door” style, is what you would find in a commercial business. In some cases, the hoistway is built outside the building, which adds to the interior of the building. You can also find the “swing door” elevator in many high end homes. Some of these home elevators have the elevator interlock, while most do not.

Recently, all updated and newly installed elevators will be compliant with national standards. I would bet that everyone has been in a compliant elevator at least once, but did not know it or really give it a second thought. The call button on the main floor will have a star next to it and as the elevator car moves from floor to floor, it will make a gong or buzz type of noise.

The machine room-less (MRL) elevator, as referenced in the beginning of the article is worded as “the new kid on the block,” but in reality, these have been around for many years. These were designed to replace the “hydro.” The pros to this are lower insurance ratings due to the building owner not storing a few hundred gallons of flammable liquid in the building. The machine room takes up less area, meaning more rentable space for the building owner. The lack of hydraulic oil smell in the building and thus no over spill or broken lines to ruin anything is also a feature of this type of elevator. Besides, the other benefit is the system uses less power.

Now you should be able to identify the different types of elevators. In the future, we will discuss ways to better understand the use of elevators at high rise alarms, fires and troubleshooting the call with stuck elevator cars.

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