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EXTERNAL ENVELOPE
above the opening to house the operator. This means that it can be substituted with a glass roof, further improving the aesthetic appeal. If a warm air curtain is required, then a vertical column-type heater should be considered.
When the operator is mounted above the opening leaves, an overhead drive option will allow a warm air curtain to be concealed within the operator canopy as well as bespoke lighting systems and CCTV cameras etc. A minimal amount of space is required for a floor ring beneath the system, meaning these might be more suitable when replacing existing doors or when there is limited available floor depth.
Facade integration
Curved sliding doors can be integrated into multiple types of facade construction including curtain walling systems and all-glass screens with suitable facade connections. Specification teams are on hand to support the design of these elements however.
Some manufacturers can offer bespoke sizes with diameters up to 6000 mm and passage heights up to 3500 mm with the opportunity to incorporate an additional canopy above to increase the system height
further maximising architectural freedom. However, the larger the door system, the more consideration needs to be given to site delivery, service and maintenance, as well as access, and indoor climate impact.
Security
When building security is a priority such as in financial buildings, data centres and other secure establishments, then enhanced security options are also available. From physical security options such as burglar- resistant glazing and electromechanical locking to operational security in the form of ‘anti-piggy backing’ and ‘anti-tailgating’ technologies. There is also the ability to add access control with options such as iris and fingerprint scanning, facial recognition, and code card readers. Ultimately, it depends on what you require from your building entrance. Curved doors are less complex, inclusive by design, extremely flexible and can be used on escape routes. One thing is for sure, by choosing a curved door you will be assured of the grand, elegant yet functional entrance that your building deserves.
James White is specification manager at Record UK
Frameless structural glass specialist installs Kestrel ‘invisible’ flush glazed mirror door
C
ontemporary Glass Structures a company which specialise in frameless structural glass products were selected to manufacture and install a flush glazed mirror door for a 4th-floor terrace glass facade as part of extensive renovations of a commercial office building in the heart of Manchester’s professional district. Andy Howells of Contemporary commented: “The client wanted the door to almost disappear within the glass facade externally. The contractor’s
curtain wall
supplier could only do a standard framed door,
not what the architect and client
wanted.” Drawing on their experience in the fenestration industry Contemporary offered a bespoke solution and specified the Kestrel Aluminium residential door system as the base for the project.”
“The geometry of the door hinges gave the best external glass to glass gap at the hinge position without the glass on the door leaf clashing with the glass which is silicone
Contemporary installed a door closer to stop the outwardly opening door from catching in the wind and opening too far (past 110°) which would cause the glass to clash and destruct. A stainless-steel boss was machined to space the external handle mounting face away from the door by 14mm to allow for the thickness of the external stepped glass and the silicone bond. The door frame was powder coated with a
bonded to the outside of the outer frame. Also, the slim minimalistic design of the hinges worked well with the aesthetics of the design, meaning they sat in line or just behind the outer glass surface line.” The robust sturdy nature of the PAS 24 accredited Kestrel door with its double mechanical spring cleats to each mitre joint also gave the team the confidence to attempt this design for this size of door which at 1200 mm wide x 2600 mm high weighed nearly 100 kg.
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special, not readily available TIGER Drylac® colour. The glass specified was Guardian Glass HD20 “made to order” product. Contemporary worked closely with their specialist suppliers to meet the specification and match the building’s glass facade, whilst completing the installation within the construction schedule. Andy Howells commented, “the client is delighted with the final result, it has been a challenging but well worthwhile project.”
0121 333 3575
www.kestrelaluminium.co.uk 01/08/2022 09:33 ADF AUGUST 2022
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