| Specifications |
| Engineering data | |
| Floor areas (whole building) | |
| Gross: | 23 320 m2 |
| Net usable area: | 20 153 m2 |
| Plant rooms: | 2087 m2 |
| Landlord areas: | 3910 m2 |
| Tenanted switch spaces: | 7366 m2 |
| Amenity & dining: | 70 m2 |
| Contract details | |
| Tender system: | Negotiated |
| Form of contract: | JCT management contract |
| Contract period: | Oct 1998 to Oct 1999 |
| NES used: | No |
| U-Values (W/m2K) | |
| Walls: | 0·45 |
| Floor: | 0·60 |
| Roof: | 0·45 |
| Glazing: | 5·6 |
| Structural details | |
| Slab thickness: | 150-180 mm |
| Clear floor void: | 600 mm |
| Floor to ceiling: | 3000 mm |
| Ceiling zone: | 1100 mm |
| Net services zone: | 500 mm |
| Live load: | 5 KN/m2 (general)/10 kN/m2 (roof plantrooms) |
| External design conditions | |
| Winter: | -4°C/Sat |
| Summer (a/c): | 28°C db, 19°C wb |
| Internal design conditions | |
| Winter: | 13°C to 23°C dry bulb (switch areas 23°C all year round) |
| Summer (a/c): | 23°C/20-80% saturation |
| Occupancy | |
| Offices: | 1 person/20 m2 |
| Meeting rooms: | 1 person/2 m2 |
| Typical occupied hours: | 24 h, 365 days/y |
| Diversity (hours/week): | 168 |
| BREEAM rating: | No |
| Noise levels | |
| Offices: | NR 38 |
| Toilet & circulation: | NR 40 |
| External breakout limits: | 70 dB(A) at 1 m |
| Ventilation | |
| Scheduled supply air temp: | 15°C winter, ambient in summer |
| Fresh air: | 100% min |
| Filtration EU category: | EU5 |
| Primary air volumes | |
| AHUS at: | 8·80 m3/s (1 x general) |
| AHUS at: | 0·56 m3/s (1 x toilet) |
| Loads | |
| Calculated heating load: | 0·8 MW |
| Installed heating load: | 1·5 MW (existing) |
| Cooling (future increase) | |
| Calculated: | 3·7 MW (4·9 MW) |
| Installed: | 3·7 MW (4·9 MW) |
| Distribution circuits | |
| LTHW: | 82°C flow, 71°C return |
| DHWS: | 60°C flow, 55°C return |
| Constant temp: | 82°C 71°C return |
| Chilled water: | 6°C flow 12°C return |
| Refrigerant | |
| Chillers & computer room: | R134a |
| Electrical supply | |
| 4·5 MVA + 2·5 MVA upgrade | |
| 3 x 1600 kVA transformers + 1 x 2·5 MVA upgrade | |
| 7·5 MVA standby power | |
| Lighting | |
| Type: | fluorescent (access and plantrooms) |
| Lux levels | |
| switch spaces: | tenant fit-out |
| meeting: | 300 lux |
| kitchen: | 300 lux |
| toilets: | 150 lux |
| stairs: | 200 lux |
| corridors: | 200 lux |
| Lifts | |
| Existing passenger lift refurbished: | hydraulic, 630 kg, 0·5 m/s |
| I x new passenger lift: | hydraulic, 630 kg, 0·63 m/s |
| 2 x existing goods lifts, refurbished: | 1 x 3000 kg, 0·5 m/s, 1 x 2500 kg, 0·5 m/s |
