With warehouses exceeding 100,000m² in the UK, fire safety design for these mega-structures requires specialist engineering. We explore the challenges and solutions.. The Scale Challenge Modern UK distribution centres can exceed 100,000m² — far beyond the compartment sizes envisaged by ADB. Key challenges: Single compartment fire can destroy the entire building High bay racking creates complex fire dynamics Automated systems reduce human detection capability High value stock creates enormous financial exposure Fire Engineering Approach Sprinkler Design ESFR (Early Suppression Fast Response) sprinklers for high bay storage In rack sprinklers for standard racking configurations Design to BS EN 12845 with FM Global or LPCB specifications Compartmentation Options Fire walls dividing mega warehouses into manageable compartments Fire shutters for operational flexibility Smoke curtains for smoke reservoir management Detection Aspirating smoke detection for early warning Beam detectors for high ceiling spaces VESDA systems integrated with suppression Case Study: Amazon Fulfillment Centre 85,000m² fulfilment centre required: ESFR sprinkler system throughout 4 smoke compartments with fire curtains Aspirating detection with 30 second response target Performance based smoke ventilation design For warehouse fire engineering, contact us.