Where is demarcation used?
To create a divide between a safe and hazardous zone. At ground level this can be to keep pedestrians away from moving vehicles or machinery. At roof level this can be to keep rooftop workers away from a fall hazard.
Where is demarcation installed?
When there is a requirement to identify the separation between areas of safety and danger using a physical barrier. (ensuring the demarcation is at least 2m from the hazard)
What do the HSE think of demarcation?
HSE publications WAHR (2005), HSG/33 and HSE INDG284 note the benefits of demarcation systems where the demarcation system is at least 2m from the hazard. (see attached sheet Demarcation – legislation)
The Working at Height Regulations 2005 recommend the selection of collective protection, is demarcation classed as a form of collective protection?
Yes ; “Where work is not done at the edge, demarcation barriers can be provided at a safe distance from the edge (usually at least 2 metres). e.g. work on an air-conditioning unit in the middle of a roof. Barriers should be visible and obvious “ L24; Health and Safety in Construction: HSG 150 (3rd edition); Health and Safety in Roof work: HSG33.
Can demarcation be used instead of guardrail?
Yes; HSE INDG284 states “full edge protection may not be necessary if limited work on a larger roof involves no body going any closer than 2m to an open edge. In such cases demarcated areas can be set up, outside which nobody goes during the work or access to it.
Can demarcation be used at ground as well as roof level?
What components make up the demarcation system?
The demarcation system is made of 3 components; base, post & chain.
What spacing are the posts?
A 3m spacing
Will the system sit on any substrate?
Yes – assuming it is flat. We would note that where the system is to be placed on a roof covering we would recommend that advice be sought from the roof covering manufacturer as to the compatibility of the systems. In some instances i.e. Single ply membrane there may be a requirement to place a separation layer (sacrificial pad) between the base of the post and the roof covering.
Is specialist training required to install the demarcation system?
No. Having identified the position of the system at least 2m from the hazard, installation of the demarcation system is quick and easy requiring no specialist tools.