Farrat reduce structure borne noise from London Underground trains penetrating new £700m Francis Crick Biomedical Research Institute building

19th Jan 2018

Francis Crick building construction - preparing the Farrat floors before concrete pouring

Francis Crick Institute – the new home of a world leading medical research institute in London – has taken five years to build and was completed in August 2016. It was designed by HOK working with PLP Architecture and constructed by Laing O’Rourke, who was appointed as Main Contractor.

The basement of the building sits over an underground line and houses a large lecture theatre auditorium. Farrat were approached by the Acoustic Consult to design and supply an acoustic flooring system that would provide flanking sound insulation > 55dB DnTw + CTr  at the same time as reducing structure born re-radiated noise from the underground trains.   Farrat’s Concrete Floating Floor system was selected as the most effective solution, achieving 95% isolation at 63Hz with a natural frequency of 12Hz.   A special detail was additionally included, to allow a movable wall to be built through the centre of the auditorium so it could function as one large lecture theatre, or be separated into two smaller auditoria whilst retaining its isolating function and maintaining a high level of sound insulation between the two.

For more information on this system, visit our Farrat Concrete Floating Floors page or contact our Technical Team. Alternately, download the specification from RIBA NBS here.