Posts made in July 2022

Are Revolving Doors Still a Thing?

Once, revolving doors were a brand-new innovation that property owners were excited to add to their buildings. They were first invented in Germany in 1881 to prevent air drafts from entering along with guests. Shortly after, the three-partition version that’s so familiar today was patented in America. By the turn of the century, it became common to see revolving doors in New York and elsewhere. Indeed, they are still popular even today and are found at all types of properties, including shopping centers, healthcare facilities, restaurants, and much more.


However, revolving doors have experienced setbacks in their popularity over the decades. In particular, a 1942 nightclub fire in Boston resulted in nearly 500 people losing their lives, in part because panicking people became trapped in the club’s revolving door. To prevent such a tragedy from occurring again, revolving doors must now be collapsible in case of an emergency. Some jurisdictions also dictate that there must also be at least one swinging door nearby to aid in escape.


Despite the setbacks, revolving doors are still very common, especially in taller buildings where it is important to block drafts and prevent the chimney effect from occurring. Some of their other advantages include improving traffic flow, facilitating access for visitors using mobility aids, and generating energy savings.

How Do Automatic Doors Know When to Open?

They cut down utility bills, help disabled people with access and make life a little more convenient for everyone—automatic doors do a lot for us, and it’s all managed by relatively simple technology. The “magic” of automatic doors in New York and around the world is thanks to sensors. As you’d expect from their name, sensors sense things, including sound, light, motion, pressure, and more. The stimulus that activates an automatic door depends on what kind of sensor it utilizes.


For example, some doors are triggered by pressure sensors. When the sensors pick up the pressure of a person near the entrance, they tell the doors to open. The pressure sensor may be disguised in a rubber mat near the entryway or even incorporated into the flooring.


Another popular sensor type for automatic doors is motion. A camera-equipped sensor is mounted above the entryway or built into the door frame. When something moves within the sensor’s range, the doors open right away and then close shortly after. Doors can also use different types of sensors, but motion and pressure are the most common varieties. Each has its advantages, so determining between pressure and motion is a matter of what works best for that particular property.