1. One elevator is required for every 45,000 net useable square feet. Depending on the population of the building, the ratio of floors to elevators should be two to one or two and a half to one. The greater the population density, the more elevators are required. For example, an office building with only 20,000 square feet per floor but with 80 floors would require two elevators per floor or four total.
Two elevators are required for every two floors, which means that if your building has 20 floors, then it's enough to have one elevator serving each floor. If the building had 40 floors, then you would need another elevator to serve the remaining 20 floors. But what if it has 60 floors? You would still need another elevator to serve the other 20 floors! In general, if there are n floors, then you will need n-1 elevators to service them all.
However, in practice, most buildings have more than 20 floors because people don't need to go upstairs all the time. As long as there is at least one elevator available, people will use it instead of waiting for the lift to come down again. So in reality, you will usually need between 21 and 29 elevators depending on how many floors there are in the building.
There are several factors that determine how many elevators you need in your building. The number of tenants and their floor distributions are two important factors.
Elevators are the most popular means for multistory structures to offer access. An elevator is not necessary because the building is less than three storeys tall. (A building must be under three floors or have fewer than 3000 square feet per floor to qualify for the exemption; it does not have to fulfill both criteria.) However, many people prefer elevators for their convenience and safety.
An elevator can be a luxury that expensive apartments can afford but not all tenants. If the building owner/manager decides not to install elevators, then they can charge more for rentals than those who do provide access via elevator. Many people feel uncomfortable using stairs even if the building has them, so this can also be a reason why some buildings don't have elevators installed.
In conclusion, elevators are not required in buildings with fewer than 3 stories due to government regulations. This is because elevators would be too dangerous if used by people who were not able to climb stairs. However, many people still prefer using them even if the building doesn't have elevators because they're convenient and safe.
(National Elevator Industry, Inc.) #12. The average elevator provides 40 feet of upward or downhill movement to passengers. In a typical skyscraper, that equates to 4 or 5 floors per person. (National Elevator Industry, Inc.) # 13 When in use, the typical elevator transports 5 persons every trip. However, larger elevators can transport up to 10 or 12 people at a time.
In a building with 100 stories, there would be 10,000 feet of travel space for the elevator to use as it goes from floor to floor. If the average distance between floors is say, 20 feet, then the total area of the elevator car could be 200 square feet. Or, stated differently, one square foot of floor space will carry enough freight so that 20 square feet will move an average-sized elevator.
The elevator cab is a closed space, so it needs to be large enough to accommodate people getting on and off. Also, the elevator must be able to turn around fast so that people don't get left behind. For these reasons, most elevators are large, open cages with a capacity of five or six people.
It takes about forty seconds for the elevator to go from the bottom to the top of its track. This means that, on average, it stops every floor. On a good-size elevator, this would mean stopping every mile away from the top.
Also, since 1968, new buildings five floors or taller have been required by the city to contain an elevator, albeit some five-story structures are exempt. So six storeys is tall enough to necessitate the use of an elevator but low enough to eliminate the requirement for a water tower and other extra building expenditures.
However, most skyscrapers have more than six floors - often many more if they are located in Manhattan - so they need to install an elevator every floor except the ground floor.
The elevators themselves are expensive; therefore, builders tend to avoid installing them where possible. In fact, only about 15% of all apartments in New York City have their own elevators. The others are serviced elevators found in multi-unit buildings or community elevators that serve several units on a single floor.
Serviced and community elevators usually cannot be used to travel between different floors within the same building, so people who live on opposite ends of a hallway will need to take separate elevators to go up one floor and down another.
This can be problematic if you want to move heavy objects or access inaccessible areas without help from human hands. However, it does provide an opportunity for self-serve machines where you can put in a coin or card to use as a key for your apartment or office.
These are called "card-operated elevators" and they're becoming increasingly common.