Data centres | Archive Titles

Table 1 Data centre redundancy levels summary
	Tier 1	Tier 2	Tier 3	Tier 4
Electrical
Utility	N	N	N	2N
Generator systems	N	N	N+	N+2
UPS systems	N	N	N+1	2N
Power distribution systems	N	N	N/N+1	2N
Mechanical
Heat rejection equipment	N	N+1	N+1	N+1
Chilled water	N	N+1	N+1	N+2
Chilled water risers	1 path	1 path	1 path	2 path
Chilled water piping	1 path	1 path	1 path	2 path
Computer room air distribution	N	N+1	N+1	N+1
Availability	99.671%	99.741%	99.982%	99.995%
Tier 1 – Single path for power and cooling distribution, no redundant components%3Cbr /%3ETier 2 – Single path for power and cooling distribution, redundant components%3Cbr /%3ETier 3 – Multiple power and cooling distribution paths, but only one path active, redundant components, concurrently maintainable%3Cbr /%3ETier 4 – Multiple active power and cooling distribution paths, redundant components, fault tolerantDefinitions:%3Cbr /%3EFault tolerant – A site that can sustain at least one planned site infrastructure failure with no critical load impact%3Cbr /%3EConcurrently maintainable – A site that is able to perform planned site infrastructure activity without shutting down critical load

Cost breakdown
Item	Unit	Quantity	Rate	Total
Disposal and water installations
Rainwater goods; downpipes and gutters	m2	8,500	6	51,000
Soil, waste and vent	m2	8,500	9	76,500
Condensate drainage from ACUs and FCUs	m2	8,500	6	51,000
Hot and cold water services	Item	1	127,500	127,500
Space heating and air treatment
Chilled water plant with redundancy of N+1 to provide 1000W/m2 cooling to the technical space	Item	1	2,040,000	2,040,000
Chilled water distribution to data centre to freestanding to freestanding cooling units with associate	Item	1	2,987,200	2,987,200
Supply and extract ventilation to technical space, switchrooms and ancillary spaces, including grilles and diffusers	Item	1	2,120,000	2,120,000
Freestanding room air-conditioning units with redundancy of N+20% to technical space and switchrooms	Item	1	1,657,500	1,657,500
Air-conditioning to offices areas; two pipe fan coil with electric reheat	m2	550	210	115,500
Communications room cooling	Item	1	7,500	7,500
Toilet extract installation; kitchen extract system	Item	1	27,500	27,500
Gaseous and smoke extract systems to technical spaces complete	m2	5,100	10	51,000
Electrical installations
High voltage switchgear, transformers and distribution based on a requirement of a 6MVA dual supply	Item	1	500,000	500,000
Main and sub-main installation comprising of switchgear, power factor correction, cabling, busbar and distribution equipment	Item	1	2,000,000	2,000,000
Low voltage distribution to support areas directly fed from main LV panel	m2	550	18	9,900
Clean earth system; to plantrooms & technical spaces	m2	7,950	10	79,500
PDUs complete with isolating TX and an average of 160 SP outgoing ways, (based on 40 fed from UPS output panel)	Item	1	1,600,000	1,600,000
Dual power supplies to PDUs (225kVA ave 75m)	Item	1	750,000	750,000
Emergency power off installation	Item	1	20,000	20,000
Underfloor power distribution to cabinet locations, based on a requirement of 3,200 cabinets dual fed	Item	1	2,300,000	2,300,000
Small power distribution to technical spaces for general use	m2	5100	5	25,500
Small power distribution to plant areas	m2	2850	15	42,750
Small power distribution to support areas; busbar and floorbox to office areas, wall mounted elsewhere	m2	550	35	19,250
Lighting installation	m2	8500	15	127,500
Luminaires and lamps	m2	8500	30	255,000
Extra over for luminaires and lamps to support areas	m2	550	50	27,500
Emergency lighting installation	m2	8500	10	85,000
Power and containment to cooling units in technical spaces, based on a required of 82 units with dual feeds	Item	1	120,000	120,000
Power and containment to mechanical services in plantrooms	Item	1	25,000	25,000
Containment in plantrooms; trunking, tray and ladder rack	m2	2850	20	57,000
Power and containment to serve BMS, CCTV and fire alarm system in technical areas	m2	5100	10	51,000
IT containment to technical spaces, based on 600mm basket supported on channel run to cabinet locations	m2	5100	20	102,000
IT containment to support areas, generally	m2	550	15	8,250
Standby generator installation – 5 1,500kVA units, providing N+1 (rate based on £160/kVA)	Item	1	1,700,000	1,700,000
UPS installation – 16 x 800kVA (4 x 3.2MVA) static units, providing full (2N) redundancy; 10 min autonomy (based on £200/kVA)	Item	1	2,560,000	2,560,000
UPS input/output panels and distribution	Item	1	1,600,000	1,600,000
Glazed feature lifts; hydraulic; 13 person, serving 2 stops each	Item	1	80,000	80,000
Passenger/goods lift; hydraulic; 21 person, 1600kg; serving 2 stops; dock leveller	Item	1	100,000	100,000
Gas installations	Item	1	40,000	40,000
Protective installations
Earthing and bonding	m2	8500	5	42,500
Lightning protection	m2	8500	2	17,000
Pre action sprinkler installation to plant areas	m2	2850	35	99,750
Sprinkler installation to offices	m2	550	30	16,500
Gaseous fire suppression system to technical area	m2	5100	220	1,122,000
Leak detection	m2	5100	20	102,000
Communications installations
Fully addressable fire and smoke detection and alarm system to plant and support areas	m2	3400	18	61,200
Allowance for interface of fire and smoke detection system with gaseous extinguishing installation	m2	5100	2	10,200
VESDA Installation to technical areas	m2	5100	50	255,000
Intruder detection, based on monitored door, windows and PIR detection	m2	8500	5	42,500
Alarm installation to disabled toilets	Item	1	1,500	1,500
CCTV installation to technical spaces, based on a full requirement of CCTV in all aisles between cabinets (160 fixed cameras)	Item	1	650,000	650,000
CCTV installation to plant and support areas	Item	1	70,000	70,000
Access control system to technical spaces; (25 readers); plant & support areas (18 readers); door entry system to support areas	Item	1	107,000	107,000
Containment for security system	m2	8500	8	68,000
Building management system	m2	8500	35	297,500
Extra for enhanced BMS in technical and plant spaces	m2	7950	15	119,250
Electrical monitoring system	m2	8500	50	425,000

Total cost: £27,104,250