Detailed specification for 40,000 and 100,000 ft2 buildings |
Foundations | Reinforced concrete foundations |
Ground-floor slabs | Reinforced concrete floor slabs. Power floated finish |
First, second and plant room floor slabs | Precast concrete planks with structural topping or insitu concrete on permanent formwork. First, second and plant room floor slabs give one-hour fire resistance |
Structure | Internal steel frame, generally on a 6 and 7.5 × 6 m grid, supporting upper floors, roof framing and plant room floor slabs |
External walls | Cavity wall construction up to sill level. Outer skin of facing brickwork, inner skin of blockwork with rigid extruded polystyrene cavity insulation. Reconstructed stone to window sills and heads |
Windows and doors | Sealed unit double glazing with clear glass in polyester powder-coated aluminium frames |
Roof | Resin-bonded reconstituted slates on timber battens, insulation and timber trussed rafters. Polyester powder coated aluminium gutters and external downpipes |
Stairs | Reception stairs precast concrete with screeded landings. Balustrades in coated tubular steel, hardwood handrails |
Internal partitions | All partitions in concrete block |
Ceiling | Suspended ceiling system comprising 600 × 600 mm mineral fibre ceiling tiles |
Internal joinery | Hardwood veneer, flush-lipped solid core doors. Polished aluminium ironmongery. Hardwood skirtings, sill boards, door linings and architraves |
Lifts | Electrically operated eight-person hydraulic lifts with stainless steel doors, surround and control panels |
Sanitary fittings | White vitreous WCs and wash basins |
Floor finishes | Medium-grade metal-faced full access flooring (250 mm overall floor zone) to office and corridor areas. Carpet finish high quality |
Wall finishes | Plaster finishes or plasterboard drylining with joints taped and filled to general areas. One mist and two full coats of emulsion |
Power | Wiring to and installing of three compartment floor boxes at a rate of 1 box/10 m2 net floor area and busbar power distribution system |
Lighting | Based on 1994 CIBSE Guide for Offices at 450 lux at 0.75 musing 600 × 600 mm recessed modular fluorescent luminaries. The lighting scheme is based on open-plan offices |
Heating | Gas-fired boiler in each plant room provides low pressure hot water for heating |
Above-ground drainage | PVC soil vent waste pipework |
Ventilation | Air-conditioning of office area using a VAV system with fresh air supplied via ducted system |
WCs | A roof void mounted, packaged twin-fan extract unit |
Hot and cold water services | Hot water to basins provided by central storage heaters, other hot and cold water services as suitable |
Below-ground drainage | Flexible, jointed, vitrified clay or concrete pipework |
External works | Includes access road, plot road and parking aisles. Concrete block paviours to all roads. Bitumen macadam to car bays. Footpath in concrete block paviours. Full landscaping. External irrigation system. External car park lighting |