Safety nets must be securely anchored before any work starts. They must also be constructed of material strong enough to catch a falling person or object.
A safety net should be installed as close as possible to the underside of the work area (no more than 2m) and extend at least 2.5m beyond it.
Prior to the installation of a safety net, the intended configuration, method of attachment and strength of the supporting structure should be verified as adequate by a competent person such as an engineer experienced in structural design.
The verification should be in writing and retained on site until the net has been dismantled.