Refurbishment of. Thorpe Park, Leeds

Transcription

1 Refurbishment of 3200 Thorpe Park, Leeds Outline Specification

2 Summary Specification The building is to be substantially refurbished to provide a new entrance approach with glass lobby, communal entrance area with social breakout facilities, new WC and shower facilities and modern open plan offices. Headline items include: New entrance approach Social entrance / breakout area Raised access floor to office areas LED lighting providing LG7 compliance 2 no. refurbished lifts Refurbished WC and shower facilities High quality finishes throughout Example of open plan office suite specification Example of vanity trough to WCs specification

3 Outline Architectural Specification The development consists of the refurbishment of 3200 Thorpe Park, Leeds including, reception, WC areas and ground and second floor offices. The works include reconfigured entrance, WC areas and office floor plates providing open plan office accommodation across both floors with flexibility for subdivision. All existing finishes have been renewed to provide a modern fit out. Office areas are modern and neutral. Reception and WC areas are also modern and neutral with feature tiling, wall finishes and lighting. The existing buildings structure has been largely retained including columns and stair cores. Ceiling heights are generally 2.7m A new structural glass entrance lobby is proposed to the front of the building along with rainscreen cladding to create a new feature entrance with better definition from the Century Way. The entrance area is to be created as a communal social area / break out space with facilities for informal meetings for use by tenants. Generally internally: Feature laminate doors, are provided throughout to all principle areas with painted skirtings, architraves and frames. All existing structure has been fully refurbished to ensure a consistent finish throughout between existing and new interventions. WC areas are proposed with feature solid surface trough basins with motion sensor taps, solid surface wall panels and ceramic tiling to floors. Plastered ceilings with recessed lighting. WC s feature solid partitions with feature laminate doors and white sanitary ware. Dyson Airblade hand dryers throughout. Male and Female shower facilities are provided at each floor within the new WC cores. Ceilings The reception area is a double height open plan space and generally features plastered painted ceilings with feature pendant lighting; British Gypsum Gyplyner system using Gypframe GL1 channel grid hung from u/s of existing structure with 15mm plasterboard & skim finish. All to be installed in strict accordance with BG standard details. Upper floor core areas feature a proprietary linear plank system with inset lighting and services by Armstrong Ceilings Metal R-H215 Microperforated 400mm x 2700mm x 40mm BP 3872 M6H2 + OP19 acoustic fleece fixed into suspension system concealed grid system H profile 35. To the open plan office areas generally, metal grid ceiling system, Armstrong metal Axal Vector microperforated RD mm x 600mm ceiling tiles with plasterboard transition BP9420 M6I2 with acoustic fleece. Fixed into Armstrong

4 Prelude 24mm suspension system plasterboard perimeter to full extent of offices with proprietary transition using Armstrong Ceilings BPT3210 plasterboard to tile trim in colour to match tiles Installations are undertaken in full accordance with manufacturer s instructions and include all appropriate suspension and support systems. All ceilings achieve Euroclass fire rating of A2. WC areas feature plasterboard ceilings finished with plaster and paint; British Gypsum wallboard 12.5mm with 2.5mm painted plaster skim finish to soffits and downstands on British Gypsum Gypliner system using Gypframe GL1 channel grid hung from u/s of existing structure. All to be installed in strict accordance with BG standard details. Doors Internal All new doors to office suites / core areas are quality solid core laminated doors finished in a matt finish resistant to finger prints etc to give a high quality modern look, with complementary frame and architrave. Suite doors have large glazed panels. All performance is as required by the building regulations. Floor Finishes Reception area has large format feature floor tiles with inset carpet to waiting area and primary barrier mat to the entrance lobby.. Entrance mat Forbo Nuway Tuftiguard. Waiting area Walk The Plank, Buckeye by Interface Carpets WCs and showers will have matching complimentary ceramic floor tiles Vinyl sheet to cleaners store is heavy duty contract non slip flooring by Forbo Carpet to core areas and offices is to be high quality commercial grade suitable for office installations by Forbo flooring All floor tiles have appropriate slip resistance as required by the building regulations. Raised Access Floors Metal faced solid timber composite raised access floor plates, set to adjustable metal pedestals, ready to receive new services installations. Wall Finishes Generally all areas have received a painted finish. Existing walls have been skimmed / lined as appropriate and all new studwork walls will receive a 3mm plaster skim and paint finish in vinyl matt emulsion paint. Plasterboard to be British Gypsum wallboard 12.5mm or equal approved with plaster skim finish. Reception benefits from feature laminate panels and detailing WCs have part solid surface / part painted walls.

5 Moodboard Core area ceilings Office area ceilings Office Suite Inspiration Reception Inspiration

6 Mechanical Services Heating and Cooling The open plan office spaces are conditioned by the use of ceiling mounted 4 pipe fan coil units utilising low temperature hot water and chilled water. The fan coil units are located within the ceiling voids and deliver treated air into the occupied spaces through ducted ceiling mounted diffusers. The room air returns to the fan coil unit utilising the ceiling void as a return air plenum via dedicated ceiling mounted diffusers. The fan coil units are fitted with filters that can be removed for cleaning or replacement. Access to the units is via removal of the ceiling tiles. The main low temperature hot water boilers are located within the roof plantroom and consist of 2 no gas fired boilers with a CT heating circuit which supplies low temperature hot water to the fan coil units within the false ceiling. On the open plan roof terrace a single chiller unit has been installed to provide the building with it cooling requirements. Criteria Winter temperatures External Winter Temperature -4 o C Office 21 o C +/- 2 o C Common Parts Corridors - 18 o C Min Common Parts toilets - 20 o C Min Summer temperatures External Summer Temperature - 29 o C db & 20 o C wb Office - 24 o C +/- 2 o C Noise Levels Office NR40 Common Areas & Toilet NR40 Plant Areas NR65 Ventilation The open plan office areas are supplied with outside air from a supply and extract ventilation plant located within the roof plantroom. The ventilation plant draws air from the return air plenum via the main riser ductwork and this air is supplemented with air drawn in from an external louvre on the plantroom wall. The air is tempered by the use of heating and cooling coils built into the air handling unit. The humidity is maintained within the system by the use of a steam humidification system attached to the air handling unit. A proportion of the stale air is drawn off the system by a separate extract fan. Attention is provided on the systems to minimise noise transmission both into and out of the demise and surrounding areas to achieve the prescribed noise levels.

7 A central twin extract fan has been provided to exhaust air from the central toilets. The toilets, showers and cleaners rooms are provided with extract ventilation systems. All ductwork branches are provided with manual balancing dampers in line with CIBSE and BSRIA guidance, for commissioning of air systems. Smoke/fire dampers are installed in accordance with the fire strategy and compartmentation for the building. Ventilation Rates Office 10l/s per person Toilet as per building regulations to suit the number of toilets. Domestic Water Services The building has been provided with an incoming mains cold water service which has been installed to fill the roof mounted domestic potable cold water tank. The storage tank and the distribution pipework have been sized to deliver the required services with minimum water usage to sanitary ware. From this tank the water is distributed throughout the building by the use of a boosted cold water pumping system. Domestic hot water is locally generated by direct electric hot water storage heaters to serve the sanitary appliances. Wash hand basins are provided with dedicated thermostatic mixing valves (TMV) to blend the water temperature. All pipework is copper with soldered joints. Compression fittings are kept to a minimum, and only used where approved. Hot and cold water services pipework is thermally insulated with foil faced insulation. Adequate access is given for thermostatic mixing valves to allow periodic inspection, removal and cleaning operations. Domestic Services Criteria Domestic Storage temperature - 60 o C +/- 2 o C Hot water Temperature - 60 o C Hot water output Temperature Basins - 43 o C +/- 2 o C Shower - 43 o C +/- 2 o C Cleaners - 55 o C +/- 2 o C Above Ground Drainage (Foul) The foul above ground drainage system serves all sanitary appliances and relevant engineering services equipment within the building. The above ground drainage pipework connects into the below ground foul drainage system. The foul drainage pipework is constructed with adequate rodding access points. The pipework is concealed in risers behind panelling allocated for aesthetic purpose by the Architect, with access provided where necessary.

8 The showers have been fitted with suitable traps which are accessible for cleaning. Basins and sinks have been installed with anti-syphon bottle traps. Condensate drainage pipework connections are provided from the fan coil units to local drainage soil vent pipes or drainage stub ducts. Electrical Services Mains Distribution The building has a single incoming supply metered into the building which feeds a non-essential main switchboard. From the main switchboard supplies shall be routed one for each floor for Tenants lighting and small power distribution boards. On each floor a 6 way panel board has been installed which shall be provided with a check meter to be able to meter the whole floor. From the floor panel board 4 No quadrant distribution boards, each split way distribution board shall be provided with check meters to be able to split the floor into 4 separate Tenanted demises. From the main switchboard a power supply for an Essential services switchboard has also been provided for the serve the essential services, these include the Fire alarm system, Security systems and Mechanical services. The Essential services switch board has been fed by a 100kVA standby diesel generator in an acoustic enclosure which is installed by the bin store adjacent to the main entrance barriers onto the site. The landlords distribution boards and the external lighting distribution boards have been supplied from the non-essential switchboard. Cabling from the switchboards is XLPESWALSF armoured cabling. The Fire alarm system has been fed with a Fire performance mains cable. All sub mains cables include for an allowance of 25% spare capacity for the future load increase. The building has been provided with earthing and bonding to BS7671 and BS7430. The building has been protected by a lightning protection system to BS EN Lighting The lighting scheme within the office areas provides a maintained illuminance of 450 lux on the working plane and at a uniformity of 0.8 in accordance with CIBSE LG7. The lighting to all office areas shall be modular recessed LED luminaires controlled by 360 degree presence detectors Final Connections are made via a plug and socket arrangement with heat resistant flexible cable. The flexible cables

9 terminate directly into the body of the luminaire by means of a suitable cable gland. The toilet and corridor areas are illuminated by the use of recessed circular LED luminaires which are controlled by the use of 360-degree presence detectors. The reception area is illuminated by recessed LED luminaires to suit the various heights of the entrance area. Wiring The luminaires are fed by the use of a ceiling mounted lighting bus bar and lighting control modules (LCM s) which allow the lighting to be programmed to be controlled by the presence detectors. Wiring of the core and circulation area lighting has been carried out utilising LSON twin and earth cabling installed on cable basket trays. All cable containment will be designed with an allowance of 25% spare capacity for the future expansion of the building. Emergency Lighting 3 hour emergency lighting systems comprising standalone self-test emergency luminaires and illuminated exit signs. The emergency luminaires are connected to the same LCM s for the lighting circuits. The LCM s can be provided with a key test switch for testing of the emergency lighting. External Lighting The existing building mounted and pole top luminaires are to be changed for LED luminaires. The entrance into the building will be supplemented with new LED luminaires to enhance the appearance of the building. General LV Small Power 13A switched socket outlets have been installed for cleaning purposes. Sockets spaced to provide coverage for cleaning equipment to be plugged in utilising 10m leads. All outlets have been provided with MCB/RCBO s. The general open plan office spaces are generally covered by a series of 63A underfloor bus bars fed directly from the distribution board by XLPESAWLSF armoured cables. 3 compartment access floor boxes will be plugged into the underfloor bus bar to provide desk power. The 3 compartment floor outlet boxes shall be provided with a twin switched socket outlet, a plate with 4 No RJ45 data outlets and a blank plate. Services For Disabled Persons The disabled toilets and showers have been provided with an alarm system consisting of pull cords, push buttons, reset button and a sounder/indicator

10 panel outside the toilet. All disabled alarms shall be monitored in the main entrance hall behind the reception desk. The reception desk has been provided with a hearing loop system to assist persons using hearing aids. On the staircase a disable evacuation communication system has been installed at each disabled refuse point, the master control panel has been installed in the main entrance next to the fire alarm panel. Security Systems The building has an intruder alarm monitoring the external escape doors, ground floor main entrance doors and the rear car park door into the building.