4,864
addressable fire devices
Nine integrated fire and life-safety systems across a two-building Fleet Street campus — 4,864 devices, designed, installed, commissioned and now maintained by one team.
A landmark refurbishment on Fleet Street. A 1980s commercial building refurbished in full as a contemporary tenanted estate alongside the adjacent Daniel House. The Stage 4 fire strategy unified the two buildings into a single campus, opened the ground floor with a courtyard and twin atria, and depended on a layered defence of detection, suppression, evacuation and access control to deliver life safety at scale.
Gemini AMPM was appointed by Mace Interiors as the specialist subcontractor for the complete fire and life-safety package. The scope was unusual in its scale and integration — nine independent technical systems, all of which had to coexist within a single cause-and-effect model and operate as one building.
The site — two buildings, one campus. Peterborough Court is a 15-floor building — three basement levels and twelve floors at and above ground — accessed from Fleet Street through the smaller, 10-storey Daniel House and a central external courtyard. The basements hold substations, HV switchrooms, sprinkler tanks, the loading bay and central plant; the ground floor brings the Long Gallery, the retail atrium, the brasserie, reception and the courtyard interface; the upper floors are office space.
Single accountability across nine systems. Where most projects of this scale split fire and security across two or three subcontractors, Gemini delivered every life-safety and security system from a single point of accountability — one commissioning team, one cause-and-effect document, one asset register at handover, one ongoing maintenance partner. The build traces the four words behind the company's name: Asset · Management · Planned · Maintenance.
Engaged early through Mace Interiors. Coordination with OFR Consultants' fire strategy, Chapman BDSP's MEP and cause-and-effect design, and JRA's architectural intent — the two buildings treated as one from the outset.
A four-thousand-device installation across fifteen floors including three basement levels, plus plant decks, atria, the Long Gallery, retail, brasserie, courtyard and the disabled-refuge network. Nine systems delivered concurrently against Mace's fit-out programme.
Phased commissioning across 28 fire-alarm panel nodes against a 350+ row cause-and-effect matrix. HDR Consulting as independent commissioning witness. Practical Completion 13 March 2026, with City of London Building Control sign-off the same day.
Retained as the original maintaining contractor under CBRE's planned maintenance contract. Asset register, software keys, original cause-and-effect and the engineers who commissioned the building all remain in Gemini's care. No handover gap, no learning curve.
A 28-node fault-tolerant network spanning two buildings via single-mode fibre — Advanced MxPro 5 panels running Hochiki analogue addressable loops, 4,864 addressable devices, commissioned against a 350+ row cause-and-effect matrix with HDR as independent witness. Loop calculations performed against true current draw, eliminating the loop-PSU overload failure mode common to converted designs.
Baldwin Boxall Vigil 3 across both buildings, trigger inputs from the MxPro 5 network driving zone-specific messages per the matrix. Speech intelligibility verified against STIPA criteria at commissioning.
Baldwin Boxall Omnicare at each refuge point with master annunciation at the Fire Control Centre — deliberately separated onto its own cabling, annunciator and supply. Phased evacuation in a tall building is only credible if every occupant has a way of being heard.
High-sensitivity air-sampling across sensitive risers, switchrooms and IT spaces. Pipework runs modelled to verify transport time, hole sensitivity and balance — the step routinely skipped on lower-grade designs and the most common cause of ASD non-conformance.
Three flooding zones across two basement levels protecting the HV substations and switchrooms. IG55 selected on personnel safety, equipment compatibility and operational cost — life-safe for occupants, benign to the equipment it protects.
Specialist deployment across the atrium edges, the Long Gallery interface and concealed compartment lines — triggered through the cause-and-effect matrix. Compartmentation delivered where architectural openness was non-negotiable.
Approximately 130 IP cameras, positioned with line-of-sight, lens and light analysis, designed against the fire strategy's emergency-vehicle and evacuation routes — security and life-safety aligned from the outset.
Genetec Security Center Synergis as the platform of record, HID readers and credentials, Boon Edam speed lanes, Apple Wallet and CBRE tenant-app credentials, destination lift control via the Kone interface. Seven separate platforms behaving as a single, friction-free tenant journey.
Ajax wireless platform across both buildings with dual-path signalling — Grade 2 compliance met without driving conduit through a finished fit-out. Adding zones for a new tenant is a configuration task, not a cabling exercise.
Practical Completion on 13 March 2026, with City of London Building Control acceptance the same day and independent commissioning-witness sign-off. Defects closed against an evidence-based register cross-referencing the cause-and-effect matrices to the panel device download.
Gemini was the original installing contractor — and is now the original maintaining contractor under CBRE's planned maintenance contract. The asset register sits at Revision 02, structured across landlord-paid and tenant-paid coverage so the operator and the occupants both know exactly what they're paying for.
"The same building. The same systems. The same team — from build into custodianship."