8 Bishopsgate, a 50-storey tower located on the corner of two of London’s most prominent streets, is the UK’s most sustainable speculative office tower and the tallest building ever awarded BREEAM Outstanding at design stage. Developed by Mitsubishi Estates and Stanhope and described as a building full of innovation, the 570,000 sq. ft building features London’s highest solar panels, in addition to 18 litres of fresh air per person being drawn from outside every second, as part of its design ambitions to achieve both low embodied carbon and to be low-carbon in operation. As part of the construction process, BDL, one of the UK’s largest specialist dry lining contractors, has collaborated with riser door and access panel solution manufacturer, Profab Access, to supply and install significant quantities of access solutions as part of the project’s aims to optimise material efficiency.
Just under 1,000 of Profab Access’ INTEGRA 4000 Series Riser Doors and accompanying PRECISION Adjustable Frames have been installed by BDL’s contractors throughout every storey of the building. The only product of its kind currently available, the expertly engineered PRECISION Adjustable Frame completely transforms the installation process as it enables the frame to be fully adjusted to meet the specific dimensions of each structural opening. Featuring a continual adjustable steel packer system, the PRECISION Adjustable Frame also ensures the installation of each riser door throughout 8 Bishopsgate is fit for purpose, by providing the highest standards in accuracy, whilst also removing the requirement for traditionally used packers during installation. The engineered frame also features built in factory applied intumescent fire rated mastic strips to the outer frame, which provides fire stopping between the wall and the frame. The INTEGRA 4000 Series Riser Doors and PRECISION Adjustable Frames will provide maintenance engineers with safe and secure access to electrical and mechanical services, without impacting the overall interior design scheme.
As part of its commitment to construction excellence, Profab Access is the UK’s first manufacturer to have its concealed Riser Doors bi-directionally fire tested and certified by an accredited third party. The PRECISION adjustable frame has also been bi-directionally fire tested as an entire doorset with the INTEGRA 4000 Series Riser Door for up to 120 minutes, receiving the CERTIFIRE accreditation for installation in unlined shaft walls and solid wall construction. This provides BDL, Mitsubishi Estates and Stanhope with a completely certified solution, as both the frame and the riser door have been bi-directionally tested as a single doorset and are supplied with comprehensive documentation to evidence their performance credentials and adherence to all relevant regulations, including BS EN 1634-1:2014 +A1:2018.
The INTEGRA 4000 Series Riser Doors are 35dB acoustic rated, smoke sealed and airtight to Part L. In the event of a fire, the doors will maintain their frame and integrity for up to two hours, limiting the spread of fire and transmission of radiant heat for this period of time. The doors’ intumescent smoke seals also enables occupants to safely exit the building, whilst subsequently minimising potential damage to other areas of the construction. www.profabaccess.com