John Sisk & Son Ltd is part of the Sisk Group of construction companies, a national building contractor serving customers throughout the UK. The company was employed to re-configure Wembley Arena to offer improved facilities for its customers and promoters. The refurbishment of the Arena, one of London’s primary live music venues, was a £25m project, which saw the upgrading of the listed building originally constructed in 1934. The work would see a reversal of the main entrance, now to open onto a new public square, plus a new stage with a covered service yard. The Arena would also boast 12,200 new seats, nine large dressing rooms, promoter offices, a 200 seat restaurant, hospitality suites, a box office and a total of ten dedicated bars and fast food outlets.
As part of the project John Sisk needed to provide a protective service to ensure the safety of workers at height. The requirement was for any worker to be able to give a warning if a fire or other dangerous incident occurred. With the works site constantly changing, the company needed a robust, highly flexible system that would be easy to install and operate in an emergency.
Leading radio telemetry specialist Wood & Douglas supplied John Sisk with a radio-based audible warning system to give open area protection for the Wembley Arena reconstruction project. It consisted of six 120dB sounders arranged in three clusters of two devices, initiated from any of seven manual call points (MCPs) located around the site. The MCPs attach to OpenNET 6000 radio transmitters which communicate with the master control panel.
Up to 64 break glass/radio units can control up to 48 sounder clusters, enabling the protection to be extended as required; the break glass call points and sounders can be located up to 5000 metres from the MCP.
If it received a ‘Break Glass’ signal, the master control panel would activate some, or all of the sounder clusters by radio communication with battery backed slave panels and local wiring to the sounders. The sounders have a typical effective range of 70 metres in an environment with an ambient noise level of 70 – 80 dB with specific tones for ‘small fire or other safety incident’ or ‘full site evacuation’. The central panel continually monitors the health of all elements of the system, with a check signal received hourly from every radio device.
Despite being only temporary, the system proved especially useful when the construction work was being carried out on such a large congested site which was constantly changing. For John Sisk, the installation placed the company at the forefront of best practice, establishing site safety processes which met all obligations under the Control of Major Accident Hazard (COMAH).
- Radio based multi-alert break glass emergency system
- Robust, flexible, modular system for any building or works site
- Meets COMAH regulations
Quote: “The system is modular and easy to configure when deployed at the site.”