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44 EXTERNAL ENVELOPE Choices


The classic four-wing revolver is the most popular choice, particularly suitable for higher volume, two-way pedestrian traffic flow requirements in commercial office applications. It also offers improved indoor climate control due to the construction of the leading mullions and wings that form an improved seal.


A three-wing offers a slightly lower throughput capacity and narrower clear opening but offers more comfort as there is more space in each segment and is therefore better suited to low traffic environments. Comfort can be further improved by integrating a warm air curtain with either electrical heat or warm water fed into the canopy.


A manufacturer will also assist with the integration of the system into the facade of the building using either glass to glass, glass to metal or metal to metal facade connections, depending on the positioning of the door system and facade construction.


Security


REVOLVING DOOR ‘DANGER POINTS’ A: Main Closing Edge B: Secondary Closing Edge C: Opposing Closing Edge D: Leading Edge E: Leading Mullion F: Outer Stile G: Trailing Million


comply with EN16005 which states the minimum required measures to protect pedestrians using an automatic door system. A specification manager should be EN16005 certified and carry out a risk assessment on every automatic door they specify to ensure the door system will be safe in operation and suitable for the application.


On a revolving door there are multiple danger points (highlighted in the image above) which are protected by a combination of ESPE or PSPE sensors (electro-sensitive protective


equipment/pressure sensitive protective equipment) which, when activated, are designed to stop the rotation of the door to prevent injury. These are sensitive sensors that need to be easily activated. A sensor on the bottom of the revolving wing will, if it catches someone’s heel, stop the automatic door. After a short delay to remove the person’s foot from the door, the door m oves again.


CHOICES


The classic four-wing revolver is the most popular choice, being particularly suitable for higher volume, two-way pedestrian traffic flow in commercial offices


The sensors are there for a very good reason; however, if the door segments are too small and people are shuffling through them, these sensors can be easily activated resulting in frustrating delays and unimpressed end users.


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There are typically two types of security required. Physical – break-in attempts – requiring testing to standards such as EN1627 incorporating RC1 – RC6 and PAS 24, and LPS 1175 incorporating ratings from SR1 – SR 8. Secondly, operational security relates to ‘anti-piggyback’ and ‘anti-tailgating’ technology to prevent unauthorised access.


Automatic operation One automatic option, an overhead drive, enables the designer to incorporate a warm air curtain and lighting into the solid roof canopy of a revolving door maximising user comfort. In-floor operator options (where floor space allows) are available for automatic curved sliding, revolving and linear sliding door systems. When combined with an all-glass type construction help the designer deliver a minimal aesthetic, maximise light transmission and help to create the ultimate wow factor. To summarise, it’s vital to ensure the requirements of both the building envelope and building owner are met at the specification stage. Getting advice from a manufacturer’s specification manager enables a specifier to avoid


misunderstandings which can lead to safety issues, delays in installation, and time and money being wasted.


James White is specification manager at Record UK


ADF AUGUST 2021


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