You can follow safety and security assistance from HSE who advise you to consist of tools such as ladder guards and border fence, when it pertains to erecting your scaffolding for your project. https://el.thefreedictionary.com/_/cite.aspx?url=https%3a%2f%2fpbase.com%2Fnutclave0%2Froot&word=%ce%b5%ce%bd%ce%b8%ce%bf%cf%85%cf%83%ce%b9%ce%b1%cf%83%ce%bc%ce%ad%ce%bdo&sources=