ComFlor® becomes a top performer at first direct Arena, Leeds
Over 9000m2 of ComFlor® structural decks have been installed on the new £60 million first direct Arena in Leeds, as part of a complex acoustic roof construction aimed at minimising external noise levels around the venue’s highly populated city centre location.
Opened in summer 2013, the 12,500 seat facility hosts both music and sports events.
It has been built in a traditional fan-shaped seating layout, to create what has been termed a “supertheatre”, breaking the conventional mould of large scale entertainment arena design. This configuration ensures that all spectators are seated relatively close to the centre of the action.
The striking new first direct Arena boasts a unique “honeycombed” external façade that has been based on a mathematical diagram to create a pattern of varying cellular shapes which are further complemented by glazed panels and the use of coloured lights.
Creating such an unusual façade was no easy feat and building envelope contractor Lakesmere worked closely with main contractor BAM Construction to devise a specification that would satisfy the vision of the extensive design team headed up by architects Populous while also providing a practical and economical solution.
The Arena also features a double-layered acoustic roof to satisfy the project’s exacting requirement for external noise levels to be 10dB lower than ambient noise levels outside the building.
The initial internal roof layer comprises a perforated liner tray supporting two layers of insulation, an 8mm thick acoustic barrier sandwiched between two layers of plywood, topped by a further insulation layer.
The project used the biggest concrete pump in the UK, with a reach of 63m. The roof spans 70 metres at its widest point,
supported by 14 7m deep trusses.
Over 8000m2 of ComFlor® 60 with closed ends are situated 1.2 metres above the first roof layer, to form a base for the main external 150mm steel mesh reinforced concrete roof, covered with an insulated hot melt membrane system.
The ComFlor® 60 composite profile offers the ultimate in lightweight steel decking for all multi-rise buildings. It combines exceptional spanning capabilities with reduced concrete usage to provide a cost-effective and attractive solution that’s easy to install.
ComFlor® 60 provides excellent acoustic performance and fire protection, with no requirement for filler blocks. Its profile
has been specially designed with trough stiffeners and side laps positioned to guarantee centrally placed shear studs.
Over 1000m2 of ComFlor® 51+ have also been used in mansard areas that support a framework to accept insulated metal cladding to create seamless visual continuity with the walls.
ComFlor® 51+ is a traditional dovetail re-entrant composite floor deck. This profile provides an excellent mechanical key into the concrete slab, offering a strong shear bond performance, which is augmented by cross stiffeners located in the profile trough.
ComFlor® 51+ presents a virtually flat soffit and a relatively thin slab which is required to meet fire design requirements.