Structure 4. Lifts 6. Mechanical Services 10. Building Management System (BMS) 20. Electrical Services 21. Communication Services 24.

Transcription

1 TECHNICAL MANUAL

2 TECHNICAL MANUAL

3 Contents Structure 4 Lifts 6 Mechanical Services 10 Building Management System (BMS) 20 Electrical Services 21 Communication Services 24 Security 25 Fire Protection Services 26 Hydraulic Services 29

4 Structure The building is generally of concrete construction with two cores founded on rafted pads, together with the columns supported on individual pad footings. A typical floor system comprises a 180mm thick post-tensioned flat slab with drop panels. Perimeter beams are 700mm x 400mm reinforced concrete. The general column grid is 8.1m x 8.4m. The floor to floor height is 3.57m, with a floor to ceiling height of 2.7m. The floor superimposed live loads are: General Office Area Compactus Areas Plant Rooms Stairs Toilets Carpark Retail Areas Trafficable Roof Lobby Corridors 5.0k p.a (including partitions) 7.5k p.a (up to 15% of available office area, and not restricted to the cores) 7.5k p.a 4.0k p.a 2.0k p.a 3.0k p.a 3.0k p.a 3.0k p.a 4.0k p.a 4

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6 Lifts There are a total of 18 lifts in the building divided into groups serving the North core, the South core, the Richard Allen Building and the carpark. A Disabled access lift is installed in the Ground Floor for access to the KPMG Ground Floor lobby. Passenger Lifts The North core has eight passenger lifts. Four of these lifts serve floors B3, B2, B1, G, 1-5, 7 and 8 and the other four lifts serve floors B3, B2, B1, G, The South core has five passenger lifts serving floors B3, B2, B1, G, DETAILS Capacity Speed Machine Type Control Type Drive Type Door Passenger Protection Manufacturer 20 passengers, 1,360 kg 2.5 m/s Gearless overhead traction TMS900 Demand based directional collective Solid State DC Panachrome full height colour coded light ray protection system Kone Waiting time less than 30 seconds Five minute handling capacity 14% The passenger lifts function via press button controls during normal business hours (subject to each tenant s individual requirements). After these hours the building security system will be operational. Lift access is via an access card, with card readers provided in each passenger lift. Individual tenants may program access cards to provide staff members with the ability to use the call buttons within the lift car after business hours. 6

7 Lifts Richard Allen Building Passenger Lifts The Richard Allen Building has two passenger lifts serving floors G, 1-5. DETAILS Capacity Speed Machine Type Control Type Drive Type Door Passenger Protection Manufacturer 15 passengers, 1,150 kg 1.8 m/s Geared overhead traction TMS900 directional collective Solid State variable speed (TAC-5) Panachrome full height colour coded light ray protection system Kone 7

8 LIFTS Goods Lifts The building has two designated Goods Lifts, each located at the Eastern side of the North and South lift cores. Both lifts load from Basement 1. Lift 16 is the primary Goods Lift. It is located in the South core and has double opening doors which are easily accessible from the loading dock LIFT 16 DETAILS Depth Width Height Door Opening Width Door Opening Height Capacity Speed Machine Type Control Type Drive Type Door Passenger Protection Manufacturer 2,150 mm 2,000 mm 3,000 mm 1,400 mm 2,400 mm 2,500 kg 2.5 m/s Gearless overhead traction TMS900 directional collective Solid State DC Panachrome full height colour coded light ray protection system Kone Lift 4 is the alternative Goods Lift which provides access to the North core. Lift 4 is usually a passenger lift that is able to be reprogrammed to act as a Goods Lift providing access to all levels. LIFT 4 DETAILS Depth Width Height Door Opening Width Door Opening Height Capacity Speed Machine Type Control Type Drive Type Door Passenger Protection Manufacturer 2,030 mm 1,570 mm 3,000 mm 1,100 mm 2,100 mm 2,000 kg 2.5 m/s Gearless overhead traction TMS900 directional collective Solid State DC Panachrome full height colour coded light ray protection system Kone 8

9 LIFTS Carpark Lifts Two carpark lifts are located in the South core. Free access is allowed: Between B2, B1 and the Ground Floor during business hours Between B2 & B1 at all times Secured access to B3 and the Ground Floor is available at all times. DETAILS Capacity Speed Machine Type Control Type Drive Type Door Passenger Protection Manufacturer 18 passengers, 1,360 kg 1.0 m/s Geared underslung traction TMS900 directional collective Solid State variable speed AC (TAC-5) Panachrome full height colour coded light ray protection system Kone Lift Monitoring The lift control system includes an extensive monitoring network, providing direct and continuous indication of lift status to the security desk and Facility Manager s office. 9

10 Mechanical Services General The mechanical services comprises of the following systems: Air-conditioning air handling systems serve the following areas within the building: (i) Office floors in the Main Building (ii) Specialised areas on the Ground Floor (iii) Entry Foyer and Atrium (iv) Richard Allen Building (v) Tower on roof Central cooling plant including piping reticulation Central boiler plant including boilers and heating hot water reticulation Cooling towers and condenser water reticulation Domestic hot water system including domestic hot water units and reticulation Stairwell pressurization systems Mechanical exhaust ventilation systems for carpark, toilets and service areas including tea rooms, battery, electrical service rooms, general exhaust, gas meter, rooms hood exhaust, atrium exhaust, etc. Air-conditioning systems to serve lift motor rooms Condenser water loop for retail and office tenancy requirements Retail tenant kitchen exhaust system Smoke hazard management systems Building Management System (BMS) and Direct Digital Control (DDC) control systems 10

11 Mechanical Services Air-conditioning Design Criteria The base building air-conditioning system is designed based on the following design criteria: External ambient conditions Summer Winter 35 C DB, 21 C WB 4 C DB Internal conditions will be maintained at 21 C to 24 C when ambient conditions are within the above design range No relative humidity control is provided Lighting heat load 20 W/m 2 Equipment heat load 20 W/m 2 Occupancy 1 person per 12m 2 Outside air 1 l/s/m 2 Hours of service 8.00am to 6.00pm Rooftop central air-conditioning, heating and ventilation systems serve the commercial office Levels 1 to 10. Air-conditioning is supplied to each level from duct droppers. Ductwork distributes this air on each level with variable air volume (VAV) boxes controlling the amount of air to the ceiling air outlets. Each floor is serviced by six air handling units designed for energy efficiency and located in the roof plantroom. Supplementary Air-conditioning A rooftop supplementary condenser water system supplies condenser water to each office Level 1 to 10 and the Ground Floor retail tenancies. Provisions for supplementary air-conditioning are provided to cater for tenants individual needs for areas of concentrated heat load and/or 24 hour air-conditioning. Condenser water isolation valves are provided in the North and South cores for the use of tenants to serve supplementary units. Condenser water provisions for tenant use are based on 10 W/m 2 heat load. 11

12 Mechanical Services Air-conditioning Air Handling Systems Lower Levels and Atrium The lower level and atrium lobby are served by local air handling units in plantrooms located as follows: Plant Location Basement B1 adjacent to switchroom Basement B1 Mezzanine Richard Allen Building Basement Level 1 over retail at Collins Street entry Area Served Restaurant Ground Floor coffee shop, adjacent atrium base level and banking chamber Ground Floor lobby Atrium lobby and banking chamber Chilled water and the air-conditioning systems for the above areas are single duct constant volume type incorporating hot water heating coils in units. Air distribution generally comprises of linear diffusers. All air-conditioning systems incorporate DDC controls and are connected to the BMS. Retail Areas Retail tenancies are served by individual ceiling mounted packaged water cooled air-conditioning units. The air-conditioning systems in each retail tenancy generally comprise of a single duct constant volume type incorporating electric heating elements in supply air ductwork downstream of each package air conditioning unit. Air distribution generally comprises of louvre face supply air diffuser and return air grilles. All air-conditioning systems incorporate DDC controls and are connected to the BMS. 12

13 Mechanical Services Commercial Office, Levels 1 to 10 Office areas are served by central air handling plants (six systems) located in the roof plantroom and supplied with conditioned air to each floor via riser shafts. Supply and return air shut off dampers on each riser on each floor provide for after hours control. With this arrangement typical tenancy floors are provided with six air-conditioning zones per floor and can be individually controlled for after hours operation. The air-conditioning system comprises a variable volume system with six supply air ducts on each floor and fan assisted VAV boxes throughout. The air-conditioning systems incorporate DDC controls and are connected to the BMS. Richard Allen Building The air-conditioning systems serving this building are ceiling mounted fan coil units located over the toilets on each floor. The fan coil units incorporate heating and chilled water coils, with supply air ducted to ceiling and wall mounted grilles. Outside air is introduced via external wall mounted grilles in the air handling unit enclosure. Chilled and heating water is supplied from the central thermal plant in the main building. Lift Motor Rooms Lift motor rooms are air conditioned by draw through water cooled packaged air-conditioning units situated adjacent to the lift motor rooms. 13

14 Mechanical Services Rooftop Central Plant Central Cooling Plant and Chilled Water Reticulation The central cooling plant is located in the roof plantroom and consists of the following four chillers producing chilled water: A Trane CGWA 420RBA 648kWr water-cooled reciprocating chiller Two Trane Centravac S-CVGA 045 CINJSJ 1400 kwr water-cooled centrifugal chillers A York YSEBEB S55 CHES 1150 kwr screw chiller The Trane chillers were installed at the time of the original building construction in the early 1990s, and the York screw chiller has been in operation since The York screw chiller offers greater low load capability than that available from the centrifugal chillers, giving more flexibility in the staging of the chillers. Chiller staging is controlled by the Siemens Building Management System (BMS), with controllers on each chiller providing individual capacity control. Each chiller is provided with a single centrifugal chilled water and condenser water circulating pump. Condenser water pump No. 4 serving the York chiller is fitted with a variable speed drive. Central Heating Plant and Heating Water Reticulation System The central heating plant is located in the roof plantroom and consists of: Two Tomlinson SR-Plus SR1500 gas fired boilers with a nominal output capacity of 1500 kw each The boilers operate on towns main natural gas. Two centrifugal pumps circulate heating hot water around the building to the air handling units. 14

15 Mechanical Services Cooling Towers and Condenser Water System The cooling tower plant is located within an open plant enclosure on the roof, and consists of: Four BAC A365-S (22 kw motor) induced draught cooling towers arranged as two twin cell towers The cooling tower fans are controlled via variable speed drives (VSDs) to allow energy efficient operation Water treatment for the cooling towers is provided by automatic dosing and side stream filtration equipment. Central Air Handling Plant Six central air handling units are located in the roof plantroom and serve the office areas on Levels 1 to 10. Each air handling unit incorporates a centrifugal supply air fan, two axial return/spill air fans, chilled and heating water coils, return air and sill dampers and deep bed filters. The units are capable of operating on full outside air to provide economy cycle operation. Three air handling units serve the Northern areas of the building, and three serve the Southern areas of the building. Motorised dampers are installed on the supply and return opening onto each floor, giving the ability for whole floors or particular zones to be shut down, or operate after hours. Fan assisted variable air volume (FAVAV) boxes are installed on each level to provide temperature control within each zone. Electric element heaters are generally installed in the FAVAV s serving perimeter zones to provide trim heating capabilities. The main supply air fans in each AHU are fitted with variable speed drives to maintain constant supply air duct pressures as the FAVAVs modulate. The return/spill air fans have recently been fitted with variable speed drives to assist with return air control and also to reduce energy consumption. Supplementary Condenser Water Loop A supplementary condenser water loop is installed in the building, incorporating a North and South core riser. Three centrifugal pumps circulate condenser water around the building, with heat rejection facilities provided by the four main cooling towers. Each supplementary condenser water pump is fitted with a variable speed drive that is controlled by pressure differential sensors across the flow and return condenser water pipes to ensure adequate water is available to the connected equipment. 15

16 Mechanical Services Ventilation and Smoke Control Systems There are a number of ventilation and smoke control systems provided in the building including: Stair pressurization systems Atrium smoke exhaust fans Toilet exhaust systems Carpark exhaust systems Switchroom exhaust systems Plantroom exhaust systems Kitchen exhaust systems Tea room exhaust systems The ventilation and smoke control system comply with the relevant requirements of AS 1668, current at the time of design. In the fire mode the main air-conditioning plant operates in a sandwich pressurization mode, and stairwell pressurization fans start up. The air-conditioning systems in the Richard Allen Building simply shut down in the event of a fire alarm. The toilet and tea room ventilation systems have provision for future capacity for additional tenancy requirements. 16

17 Mechanical Services Energy Efficiency and Management The mechanical services utilize the Building Management System to control and manage energy usage in the building to provide efficient air-conditioning. Some of the energy saving features include: Variable volume air handling systems incorporating variable speed drives Low pressure and low velocity ductwork systems to minimize energy consumption Variable supply air temperature coupled with outside air economy cycles to maximize the free cooling from outside air and reduce air-conditioning operating costs Computer based Building Management System enabling unused floors or unused sections of a floor to be turned off Use of condenser water system for low cost and out of hours operation of retail areas Energy efficient refrigeration plant After Hours Air-conditioning After hours air-conditioning can be provided to tenancies by using a Telephone Voice Activated System. Authorised tenant personnel who have been provided with access to this system will be able to automatically control after hours air-conditioning. 17

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20 Building Management System (BMS) An intelligent computerized control and monitoring system operates the air-conditioning, electrical and hydraulic systems within the building. The BMS is a Siemens Building Technology installation and has been extensively upgraded in 2006 to the most current hardware and software at this time, the Apogee System. The comprehensive Building Management System includes the following functions: Direct Digital Control of air-conditioning and related mechanical services Monitoring of electrical services Monitoring of fire protection services Monitoring of hydraulic services Monitoring of lift services Monitoring of communications services The Siemens BMS comprises a head end computer and display monitor, field controllers and field devices such as thermostats, actuation and other sensors. The air-conditioning systems in the Richard Allen Building are also monitored and controlled by the BMS system. The BMS upgrade was undertaken to ensure the system is operating with the latest software, firmware and hardware, including: Existing stand alone controls replaced with new modular building controllers Existing modular building controllers were installed with the new Apogee firmware cards New graphical interface unit (monitor), hardware and software, including Insight Apogee software High level interface to variable speed drives Verification and proving of all control strategies The BMS is provided with a battery back-up and uninterruptable power supply (UPS) for select field controllers to ensure program memories are not lost in the event of power failure. 20

21 Electrical Services Power Supply to Site The site is reliably supplied via four No. 2MVA transformers in the adjacent Citipower substation. 66 kv supply authority cables enter the building underground from Russell Street near the corner of Flinders Lane. The main switchboard is split into base building plant, air-conditioning, retail and commercial sections and the commercial switchboard. The commercial switchboard section has been provided with surge protection. Standby Power The building is equipped with three 1,050 kva standby power diesel generators located in the roof plantroom. Each standby generator comprises an air cooled Dorman 8 cylinder diesel engine and a Stanform 1050 kva alternator. Each generator is fitted with a 700 litre day tank, with the main 35,000 litre diesel storage tank located in Basement 3. In a power failure situation, the following services are supported by the standby generators: DETAILS Lifts 25% Ventilation 100% Cooling Nil Lighting 50% Tenant Power 50% A system of intelligent control, utilizing Programmable Logic Controllers has been provided for standby power distribution. This means that in addition to the above standby power support for total supply failure, reserves of standby power will be re-allocated if available. Tenant Power Each tenant floor is served by two No. 200A supplies providing 70 VA/m 2 (approx.) capacity in the risers. General power has been designed at 25 W/m 2 for office floor areas. 21

22 Electrical Services Tenant Distribution Boards Each floor is provided with two tenant distribution boards. Tenant distribution boards are subdivided into four sections to allow for tenant provided sub-metering, with standby and non-standby sections provided to each sub-section. Metering for tenancies can be done for either North or South core, for groups of floors or for multiple tenants per floor as required. Flexibility Emphasis in design has been placed on the need for cable management to accommodate the demands of technology in the workplace. Principal cable access paths have been included in each core, together with a system of supplementary riser locations on the large floor areas. The system has been configured to match probable tenant locations of data wiring closets and network rooms. To aid tenant convenience, all wiring access is within a given tenant s floor, with access points strategically located on ducting on the building perimeter and on internal columns. Power can be reticulated via skirting duct installed around perimeter walls and columns. 22

23 Electrical Services Tenant Lighting Luminaire on a typical office floor is a 450 x 450mm fully recessed 2 x 36W PL lamp with ultra low brightness louvers, suitable for screen based task environment. Energizing both lamps provides the tenants with the option of providing high levels of illumination, while utilizing a single lamp would provide a level of illumination at the working plane for open plan layouts, as defined in Australian Standard AS The high quality luminaries also conform to the requirements of Australian Standard AS 2713 as being suitable for glare control for Visual Display Units. Switching is done in bulk by multi-gang switch panels located at each tenancy entry door. Allowance has also been made for circuiting of fittings to facilitate the addition of local switching where individual offices are constructed. Heliostat Atrium Lighting The full height internal atrium is provided with an array of solar tracking mirrors (heliostats) that reflect sunlight into the lower levels of the atrium. The main heliostat control panel is located in the roof plantroom, and allows the array of mirrors to automatically track the sun s position at any time of the day during all seasons. This natural lighting minimizes the use of artificial lighting and helps save energy. Carpark Lighting The carpark lighting generally comprises surface mounted 2 x 36W fluorescent light fittings. Emergency and Exit Lighting The Emergency and Exit lighting is provided to all areas of the building and is based around a central 110V DC battery system. The battery system and main emergency lighting distribution board is located in Basement V DC power is distributed to each level of the building (including the Richard Allen Building) via fire rated MIMS cable, with tee-off boxes provided on each floor. The Emergency and Exit lighting complies with AS 2293 and Building Code of Australia. Lightning Protection The building is provided with a lightning protection system comprising conductor cables and straps running to earth points located in the structural footings. 23

24 Communication Services The communications services of the building provide facilities including: Master antenna and distribution system Block cabling system Facilities for tenants supplementary services Master Antenna and Distribution A master antenna television system incorporating both free-to-air and satellite television is installed in the building. Roof mounted antennas and associated equipment receive broadcast UHF, VHF and FM radio signals. A vertical co-axial system then distributes these signals to all floors of the building. The system can also be used for the distribution of other audio, video and data signals within the building. Block Cabling System A block cabling system is provided throughout the building. The main building distribution is located in a basement communications room, and incorporates around 2000 pairs of incoming copper landlines. Communications cabling is then distributed to floor IDFs on each level which have ample spare space. Horizontal communication cabling is run to Krone distributors located within tenanted areas. The major utilization for the system is for voice services and associated connections to the telecommunications network. Such facilities have been designed however, to accommodate Integrated Services Digital Network (ISDN) requirements for extensive data interchange, both external and internal to the building. Riser space is available for optical fibre network connections. Flexibility The systems, both of the base building which interface with tenants and the provisions for accommodating tenants own systems, are designed to give maximum future flexibility. Cable access for floors, and to roof areas, for satellite and microwave facilities has been sized to meet the demands of tenants. 24

25 Security Access Control and CCTV System The building is equipped with a Siemens access control and intruder detection systems (ACID) and a Pelco closed circuit television system (CCTV). Both systems have been upgraded in 2006 to the most current hardware and software at that time. The access control system has been extended to service tenant needs within their tenancy. Both ACID and CCTV systems are supplied with battery backup and uninterruptable power supply (UPS) systems. Features of the access control and security system include: Monitoring and locking provided on all stair doors, with the ability to upgrade to card reader control to suit tenant requirements Proximity card readers on all lifts, permitting tenants to selectively restrict access, including during business hours Proximity card readers at building entry points This system allows for carpark and out of hours access to the building and the lift system The CCTV system features: Monitoring and digital recording of building access points, carpark access, atrium and lift lobbies The carpark is managed in two portions, a public section operated by Wilson Parking and a private section for the major building tenant. Entry to the private section is via encoded remote control. After Hours Access Access to 161 Collins Street after hours is restricted to authorized staff that have been issued with a building access card programmed appropriately. Proximity card readers are located at the main entrance to the building on Collins Street, the car park entrance, and Ramsden Place stairs. Access to office floors is via the lifts which will be activated by the access card. The card readers are located near the lift call buttons and inside the lift cars. 25

26 Fire Protection Services General Description The fire protection services consist of: An automatic fire sprinkler system A fire hydrant and hose reel system A fire detection and alarm system Portable fire extinguishers Fire brigade intercom system Emergency Warning and Intercommunication System (EWIS) Water Supply System Water supply to the sprinkler and fire hydrant and hose reel systems is an AS 2118 Grade 1 supply comprising a 150mm diameter tapping in Russell Street and a 150mm diameter tapping in Flinders Lane via a trident valve assembly from a 225mm diameter Authority mains in Russell Street and a 175mm diameter Authority mains in Flinders Lane. Towns mains pressure is utilised for Basement 4 to Level 1, with an electric operated booster pump and a separate back-up pump driven by an independent diesel engine available to increase the pressure to the higher levels. Fire brigade booster connections are located at the Russell Street entrance. Fire Sprinkler System The building is protected by a wet sprinkler system generally complying with the requirements of AS The system is fitted with flow switches for each level. Connection to the fire brigade monitoring station is via the fire indicator panel and the Tyco ASE unit. Pumps and associated alarm valve assemblies are located in the fire pump room in Basement 2. The system is split into two pressure stages which then serve nine sprinkler control valves. Electric jacking pumps are provided for the pumped pressure stage of the installation. 26

27 Fire Protection Services Fire Hydrant and Hose Reel System The entire building is covered by a combined hydrant/hose reel system generally complying with the requirements of AS and AS The system incorporates a 150mm diameter rising main which then becomes generally a 100mm diameter ring main on Levels 3 & 10 serving all hydrants and hose reels. Hydrants and hose reels are generally installed outside the stairwells within 4 metres of exit doors. The fire hydrants are unequipped as per current fire brigade requirements whilst the fire hose reels are fitted with hoses of 36m length. Fire Detection and Alarm System The fire detection system has recently had a major upgrade to comply with the current code requirements. The major components of the upgrade works included: Installation of new analogue addressable fire indicator panel Installation of new addressable detectors Installation of new addressable interface devices Testing and commissioning of the entire new system The automatic fire detection and alarm system is generally designed in accordance with AS and includes the following items: Fire indicator panel (FIP) Sub fire indicator panel in the Richard Allen Building Fire fan control panel (FFCP) Smoke detectors Manual call points (MCP) Fire bells A Simplex 4100 addressable fire indicator panel is located within a cupboard inside the main Collins Street entrance. It monitors items such as monitored control valves and flow switches, smoke detectors and manual call points. 27

28 Fire Protection Services A Simplex sub FIP is located in the foyer of the Richard Allen Building, and is interfaced with the main FIP so that any alarms generated in the Richard Allen Building are recorded on the main FIP. In addition to fire alarm signals being transmitted to the mechanical services systems to initiate fire mode operation. A fire fan control panel (FFCP) incorporated into the FIP provides direct control of the smoke control systems. Fire alarm signals are transmitted to the local fire alarm monitoring station via the Alarm Signalling Equipment (ASE) unit located in the base of the FIP. Fire Brigade Intercom System An intercom system, wired with fire related cabling and separate battery power, is provided for use by the Fire Brigade. Intercom points are located at fire hydrants, pump room and other strategic locations. Emergency Warning and Intercommunication System A comprehensive emergency warning and intercommunications system (EWIS) is provided. The system is designed to Australian Standards AS and includes emergency warning signals and emergency public address to all levels of the building. An associated intercommunication system for use by building tenants is also provided. The main emergency control panel is located in a ground floor control room near the main Collins Street entrance. A new Simplex EWIS has been installed as part of the upgrade works with warden intercom phones (WIPs). WIP handsets are typically located within fire hydrant/hose reel cabinets throughout the building. Speakers in office areas are typically flush ceiling mounted, with horn speakers installed in plantrooms and the carpark. Portable Fire Extinguishers Portable dry chemical extinguishers are located inside the electrical risers and switchboards and other special hazard areas. 28

29 Hydraulic Services The hydraulic services comprise: Site water supplies Domestic hot and cold water supplies Fixtures and fittings Sanitary plumbing and sewer drainage Trade waste Natural gas Atrium water feature Site Water Supplies The site water supplies comprise of two 150mm tappings from Authority mains in Russell Street and Flinders Lane constituting a Grade 1 water supply. Each tapping has a trident assembly providing a: Two 80mm diameter domestic water service (one from Russell Street and one from Flinders Lane) 150mm diameter sprinkler service 150mm diameter hydrant/hose reel service The incoming domestic water services are provided with water meters to record flow. Main meters are located in the meter room on the exit ramp into Russell Street, and in the hydrant cupboard located in the loading bay from Flinders Lane. 29

30 Hydraulic Services Domestic Cold and Hot Water Supplies The two supplies are interconnected and piped to booster pumps located at Basement 2 next to the fire services pumps. The domestic cold water booster pumps supply the four storage tanks (two provided for domestic cold water for North core and two for South core amenities). The cold water from the storage tanks is gravity fed to all sanitary fixtures, tea rooms and cleaners sinks and tenancies. The areas that are supplied with town mains pressure, and not from the storage tanks, are the mezzanine toilet block, Basement 1 toilet block and the Richard Allen Building. There are two additional pump sets installed on the roof provided to boost the water supply for mechanical equipment provided to North and South cores. There are cold water submeters installed to monitor water consumption for major consumers. The materials used for this installation are type B copper tube with silver soldered joints and valves (generally of bronze construction). Domestic hot water (DHW) for both the main building and the Richard Allen Building is provided by two separate central DHW plants located in the roof plantroom. Each DHW plant comprises four Bosch gas-fired instantaneous DHW units connected to an Edwards 4B 2000 litre storage vessel. Two Grundfos in-line pumps circulate DHW to amenities areas around the buildings. The materials used for this installation are solid drawn type B Kemlag tubes and fittings with silver soldered joints. 30

31 Hydraulic Services Sanitary Plumbing and Sewer Drainage There are six sewer connections, three into Collins Street and three to Flinders Lane, which collect soil and waste discharge from the plumbing fixtures and stacks. The waste is conveyed via five 100mm diameter and one 150mm diameter gravity connections to City West Water sewer mains. There is a sewer ejector pit located in Basement 4 serving two tenancies stacks, all carpark trench grates, four grease interceptor traps and all basement floor drains. Soil waste connected to this pump well is pumped via 80mm discharge line to 150mm sewer main in ramp from Flinders Lane. Downpipes and Stormwater Drainage Three stormwater drains branch inside the building to connect the 150mm diameter copper downpipes from the roof area. Stormwater drains discharge via three separate connections to Authorities stormwater drains: one 225mm into Collins Street drain and two 150mm and 225mm connections into Flinders Lane. Stormwater run-off and sub-soil seepage from the lower level carpark levels is collected in a stormwater pit in Basement 4. It is then pumped out to the gravity discharge system. Copper (type B) is used for above-ground installation, and cast iron pipes with mechanical joints are used for below-ground drains. Trade Waste Trade waste from kitchen and cooking facilities on site is collected in grease interceptor traps prior to the liquid waste being discharged via the sewer drainage system. Natural Gas Towns main natural gas is supplied to the building at 10 kpa via an Authority meter located in Basement 3. Final gas pressures are generally low pressure (1.1 kpa). Atrium Water Feature A large water feature is installed on the ground floor of the atrium, incorporating sand filtration and chlorine water treatment to keep the water clean. The filtration plant is located in a basement plantroom. 31

32 Hydraulic Services Tenant Flexibility Provision has been made for tenant flexibility including a system of ten tenancy vented waste stacks located adjacent to various columns outside the core as well two tenancy vented waste stacks located at the North core. Each vented tenancy stack comprises a 100mm sealed waste branch and 50mm sealed vent branch that provides services for specific tenancy facilities such as: Tenant kitchen (domestic) waste drainage Executive toilet and shower drainage Wet bars drainage Computer suite and supplementary air-conditioning discharge Suitable take off points for cold water supplies for the above facilities are also available in the form of 25mm valved supply branches located at each side of the North and South cores. Suitable hot water flow and return take off points are available for the extension of hot water supplies to the above facilities in the form of valved supply branches located at each side of the North core. 32

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