30 The Bond

“ Lendlease’s [30 The Bond] green building in the Sydney CBD produces “46 per cent less CO2 emissions than the average Sydney office building.”

Romilly Madew Chief Executive Officer, Green Building Council of Australia 12.03.07

Introduction

30 The Bond is Australia’s first building completed with a 5 star rating under the Green Building Council of Australia’s pilot Green Star rating system and Australia’s first to commit to a 5 star Australian Building Greenhouse Rating.

The commercial component of the Bond comprises eight office levels with an average net lettable area of approximately 2000m² per level, a smaller 216m² ninth office level, ground floor retail and two basement levels. It is a 100m long building facing due west, and PTW worked with Lend Lease to deliver the first ABGR 5 star building in Australia. This involved utilising

30 The Bond is the first 5 star Green Star building in Australia

chilled beam technology rather than conventional air-conditioning, an atrium that runs through all levels to provide ventilation, external sun-screen elements and a lighting strategy re-evaluation.

PTW Architects’ approach also focused on creating a distinctive commercial building that responds to the urban design and heritage opportunities found on this site. The retail component on the ground floor relates to the base of the atrium and to the external plaza, which forms part of a heritage precinct.

30 The Bond was designed to offer enhanced flexibility to tenants, by providing new standard to Premium/A grade quality office space. Large open floor plates offer the potential for high levels of visibility and connectivity through the building, as well as maximising planning efficiencies.

The design involved leading edge thinking in environmental planning , optimising facilities management, creating flexible team and community space within the office environment, incorporate and allow for future changes in IT provision to offices.

The design of the building is a balance of commercial and environmental objectives

Concept

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01 Cable stay public stairs02 Building entry from Hickson Road frontage

heritage plaza03 Full height atrium with “pods”04 Full height atrium with “pods”

Innovative Facade

The facade was developed to facilitate environmental initiatives by becoming more environmentally aligned.

The primary facade of the building faces west overlooking the harbour. The site is exposed to low-level western sun, which has been a defining factor in the design of the facade and environmental systems. The north, west and south facades are protected by a fully operable external venetian blind system. The system selected deploys

progressively during the day as the sun moves to the west and occupants are able to control blinds to suit their comfort level. The façade presentation evolves during the course of the day in relation to the changing external climatic conditions. The result is a living façade that will constantly move, change and adjust.

This facilitates optimum indoor comfort and flexibility by allowing full visibility and transparency during times of low solar

penetration and full protection at times of high solar incidence and glare. This improves the natural light conditions for occupants whilst reducing air conditioning energy consumption.

The result is a façade that is fully responsive and aligned with the indoor environmental controls as well as a facade with adapts, responds and registers the character and personality of the users who occupy the building.

Wintergardens

The mixed mode spaces provide diversity and choice to the occupants of the building. They contribute to a sense of openness and connection with the outside environment by allowing the sites and sounds of the immediate area to break the enclosure of the facade as well as helping erode the status of the hermetically sealed work environment.

Each level of the building has access to either naturally ventilated/mixed mode spaces. The climate in Sydney will allow the mixed mode spaces to operate for up to 70% of the year as naturally ventilated.

The facade features naturally ventilated sunrooms contributing to the overall reduction in CO2 emissions and increase supply of fresh air to occupants. The sunrooms are shaded by louvres constructed from patinated copper, oxidised steel and recycled timbers.

Enhanced indoor environment quality for the occupants and reduced green house gas emissions for the building were a defining principle in the design process.

Thermal comfort at 30 The Bond is provided by the use of concealed passive chilled beam technology instead of a current industry practice variable air volume system. Chilled beams operate by pumping chilled water through cooling elements in the ceiling. The hot air from equipment and people rise to the ceiling, is cooled by the chilled beams and then falls, creating a natural convection process of hot air rising and cold air falling. Additional radiant cooling from the chilled beams supports the convection process. The passive chilled beam systems significantly reduce energy consumption whilst improving thermal comfort for the occupants.

Chilled Beams

Atrium Rock Wall

The exposed rock wall forms a key part of the building envelope and is fundamental to identity and amenity objectives as well as supporting a significant biodiversity environmental outcome. Hand hewn by convicts in the early 1800s it is the longest and oldest sandstone cutting in Sydney.

The rock wall assists in radiant cooling of the space with moist airflows coming off the wall carefully engineered to minimise the risk of humidity and condensation associated with chilled beam systems.

The rock face is fully incorporated within the atrium space. This creates a greater sense

of entry to the building from the public square but also enhances the visibility and proximity of the rock wall at the external public space.

At the base of the atrium is a public space encouraging interaction between the building’s occupants. Stairs and glass lifts provide regular and convenient access points between floors, as well as offering opportunities for social interaction.

Jutting out into the atrium space are “pods” which may be used as meeting rooms, “greenrooms”, or for other shared activities. The view from these pods provides a sense

of connection between the floors and to the atrium. People walking into the building will have a sense of connection with the tenants who can be seen at work.

The full height atrium is opened to all office floors. Outdoor air is supplied to workspaces via chilled beams, then pollutants and hot air rise through the atrium and exhausted on the rooftop, creating a single pass airflow.

The enhanced indoor air quality increases the productivity of the work environment.

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01 Level 4 meeting room02 The atrium03 Cable stay public stairs04 Green roof and level 9 function room

Level 1 Floor Plan

Section

Project Recognition 30 The Bond links Sydney’s sustainable future with its colonial history, featuring one of Sydney’s oldest convict-hewn sandstone walls. It was the first project to be awarded a Green Star - Office As Built certified rating and also the first building in Australia to commit to achieving five stars under the Australian Building Greenhouse Rating system (now NABERS).

Green Building Council Australia

AWARdS

2005 National and NSW Property Council of Australia Rider Hunt Awards

2005 RAIA Architecture Awards for Commercial Buildings and Energy Efficiency/ ESD

2005 RAIA National Award Commendation for Interior Architecture

2005 Australian Construction Achievement Award - Winner

2005 Energy Australia National Trust Heritage Awards for Best Adaptive Reuse of a Heritage Building by Government or Corporation, and Conservation - Energy Management Award

2004 Architectural Bulletin - NSW for Building of the Decade 2000’s

2004 NSW Urban Taskforce - Development Excellence Award

2004 Australian Property Institute - NSW for Property Development, Environmental Development and Heritage Award

2004 Master Builders Association Awards, Australia for Environment and Energy Efficiency Award

2004 Master Builders Association Awards - NSW for Innovation, Commercial Building - $25m to $80m Award, Energy Efficiency Award and Restoration/Renovation of an Historic Building - $5m - $10m Award

2004 Engineering Excellence Awards - Australia for Environment and Heritage Award

2004 Engineering Excellence Awards - NSW division for Energy Efficiency and Heritage Award

2004 National Association of Women in Construction for Innovation, Construction and Design Award

CLIenTLend Lease Development Pty Ltd

LoCATIon3o Hickson Road, Millers PointSydney, NSWAustralia

ConCePT ARChITeCTLend Lease Design

CoLLABoRATInG ARChITeCTPTW Architects

PRojeCT MAnAGeR Bovis Lend Lease

InTeRIoR deSIGnWhittaker Hadenham Openshaw

STRuCTuRAL enGIneeRInG Arup; Lend Lease Design

MeChAnICAL enGIneeRInG Lincolne Scott Australia; Lend Lease Design

envIRonMenTAL ConSuLTAnTAdvanced Environmental Concepts; Lend Lease Design

eLeCTRICAL enGIneeRInG Connell Mott MacDonald; Lend Lease Design

SPeCIALIST LIGhTInG Lend Lease Design

SeRvICeS ConSuLTAnT Warran Smith and Partners; Lend Lease Design

hydRAuLIC ConSuLTAnT Whipps Wood Consulting; Lend Lease Design

FIRe enGIneeRInG Arup

ACouSTIC ConSuLTAnTRichard Heggie & Associates

CIvIL enGIneeRInG Jeff Moulsdale & Associates

FACAde ConSuLTAnTConnell Mott McDonald

LAndSCAPe ConSuLTAnTOculus Landscape Architecture

RoCk WALL GeoTeChnICAL Coffey Geosciences

heRITAGe ARChITeCT And uRBAn deSIGn Tanner Architects

ReMedIATIon URS Australia

PhoToGRAPhyJohn MarmaraPatrick Bingham-HallJohn GollingsMichael Yip

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