Modern logistics warehouses with automated storage and retrieval systems present fire challenges that traditional guidance doesn't address. A guide to protecting the UK's supply chain infrastructure.. The Logistics Revolution The explosive growth of e commerce has transformed UK warehousing. Modern logistics facilities are highly automated, extremely large (100,000+ m²), and contain diverse product types from lithium batteries to aerosols, creating fire risks that prescriptive guidance struggles to address. Scale of the Challenge UK has over 500 million sq ft of warehousing Average new build warehouse exceeds 30,000 m² Automated Storage and Retrieval Systems (ASRS) reaching 40m heights 24/7 operations with minimal human presence in storage areas Estimated £100M+ annual fire losses in UK logistics sector High Bay Storage Fire Risks Rack Storage Configuration Single row racking — accessible from both sides, easier fire service access Double row racking — back to back racks creating concealed fire development Multi tier racking — mezzanine levels within racking structure Mobile racking — movable racks eliminating aisles, creating concealment Fire Behaviour in Racking Flue spaces between stored goods create chimney effects Vertical fire spread through racks is extremely rapid Concealed fires within cartons may develop undetected Stored plastic products generate intense fires with high heat release rates Aerosols and lithium batteries create explosion and rapid escalation risks Sprinkler Design for Warehouses NFPA vs BS EN Standards NFPA 13 — predominantly used for UK warehouse sprinkler design BS EN 12845 — European standard, less warehouse specific FM Global Data Sheets — insurance driven standards (often most onerous) In Rack Sprinklers Intermediate level sprinklers within racking at specified vertical intervals Face sprinklers for rack end protection Critical for high category merchandise exceeding 6m storage height Installation and maintenance challenges in automated facilities Ceiling Only Protection ESFR (Early Suppression Fast Response) sprinklers High challenge heads delivering 200+ l/min per head Maximum storage heights defined by commodity classification Ceiling height and sprinkler deflector distance critical More practical in ASRS where in rack installation is impossible Automated Facility Challenges ASRS Fire Safety Storage up to 40m in fully automated racks No human access for fire fighting during operations Minimal aisle widths (crane width only) In rack sprinkler maintenance requires system shutdown Fire detection challenges in dense storage environments Goods to Person Systems Robotic picking systems (AutoStore, Ocado style) Dense bin storage with plastic containers and totes Lithium battery charging areas for AMRs (Autonomous Mobile Robots) Conveyor system fire risks from friction and electrical faults Detection in Automated Environments Video based flame detection for large open areas Linear heat detection along racking uprights Aspirating detection in critical zones Thermal imaging for early detection of overheating Business Continuity Single Point of Failure Risk Many retailers rely on single distribution centres Loss of a major DC can take 12 18 months to rebuild Annual revenue impact can exceed building replacement cost Insurance doesn't cover all consequential losses Compartmentation Strategy Fire walls dividing large warehouses into manageable compartments Each compartment independently protected and separately sprinklered Fire wall design to withstand racking collapse and commodity fire exposure Active fire shutters with appropriate fire rating at openings Magnus Opifex SEVEN LTD — UK's Leading Fire Safety & Fire Engineering Consultancy 🌐 magnus opifex.co.uk 📞 +44 (0) 20 3488 1926 ✉️ info@magnusopifex.co.uk Founded by Daniel Sheridan, Magnus Opifex SEVEN LTD delivers award winning fire engineering, fire risk assessments, and building safety consultancy across the United Kingdom and internationally.