
Stability and Sliding
Resistance to sliding is a critical function of the FOS barrier. Resistance to sliding is affected by the frictional resistance between the barrier and the supporting surface and the load on the footplate. The Event Organiser or, more likely, his specialist contractor [or barrier supplier] should have knowledge of the performance of their barrier on various surfaces, based on their own tests. Barrier testing is usually carried out under controlled conditions and there is no guarantee that any given surface will perform consistently, particularly at outdoor events that are affected by weather conditions and on grass surfaces which are naturally inconsistent and unreliable. It is recommended, therefore, that the following arrangements should be adopted to enhance the sliding resistance of FOS barriers at music concerts, or other events involving large crowds:
On metal trackway, terraplas overlay [or similar products], hardstanding, concrete, block paving, asphalt, and other similar surfaces, barriers should be placed on ‘thick rubber matting’ (min. 5mm thick). The matting should extend over the whole width of the barrier and footplate. Given the variable nature of the term ‘rubber’, a specification for the material to be used, details of the composition, width, thickness, and frictional resistance properties of the material proposed should all be provided.
NB Pins are not recommended for FOS installations in greenfield sites.