Passive fire protection design components are used to resist, retard and isolate flames and also the involved smoke and fumes: they don't in on their own extinguish flames for this reason They are really classed as 'passive defense'. Wireless fire alarms are a good choice for worksites which will need https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/