Elevator Technologies / Selection
I've been reading various sources about elevator selection, and I am a little confused about the common terminology.
Are "gearless traction elevators" the same as "machine-room-less elevators" ?
and "geared traction elevators" the same as conventional "machine-room elevators"?
Seems like machine-room-less elevators becomes more efficient above 30 stories (however, conventional "machine-room elevators" can still carry larger capacities). Hence, it makes selection between the two little difficult. I guess if it's a passenger elevator, mrl is the right choice for above 30 stories.
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Hi Aleksandar,
The best book to learn about elevators is Mechanical & Electrical Equipment for Buildings , which is one of the books that is listed by NCARB Handbook and in my opinion crucial to pass PPD. Also, I learned a lot from this link about elevators: https://www.archtoolbox.com/materials-systems/vertical-circulation/elevatortypes.html#:~:text=Machine%2DRoom%2DLess%20Elevators%20are,maintenance%20or%20repairs%20are%20required.
The last advice I can give would be checking elevator companies’ websites and check their specs for different types of elevators.
Hope this helps.
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Hi Elif,
Thanks for the advice. I haven't checked out the elevator related sections in the "MEEB" book.
I have the 12th edition, and was unaware that elevators were covered by the book.
Online, i found a website called "elevatorpedia" which had helpful information (although a bit cumbersome to navigate). Seems like almost all MRL elevators are "gearless traction" (even though both gearless traction and hydraulic MRL elevators exist)
the archtoolbox.com website seems also like a great resource.
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Elevators are an up and down subject. ooooh!
THE ONLY SECTION IN MEEB I read was ELEVATORS because I DID NOT UNDERSTAND which one when and why.
some facts on elevators:
Machine Room Less - are both geared and gearless traction options. They are used often when the floor area is at a premium.
FYI - there is a type of elevator that I had never had any exposure to called a HOLELESS HYDRAULIC elevator. It is a low rise elevator for situations where the soil can not support an elevator shaft OR the building site has a high water table (so drilling a hydraulic hole would be dangerous to the environment)
Hydraulic are basic slow elevators for service and people elevators up to max 6 floors (or 60 feet).
Gearless traction are faster.
BANKS OF ELEVATORS do not require as much power as a single elevator - i.e. there is a POWER REDUCTION FACTOR applied because NOT ALL ELEVATORS operate at once. This is explained really well in MEEB page 1500.
Mark, Archizam
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