Project Commissioner

City of Sydney Council

Project Creator

Tony Caro Architecture

Project Overview

Over 58,000 people pass through Pitt Street Mall on an average summer weekday, retail rents in the Mall are amongst the highest in the world, and yet the public domain had deteriorated due to the prolonged, intensive levels of pedestrian traffic and incessant re-development of the adjacent major retail stores and developments. The Mall was pedestrianised in the late 1970’s, but continued to have the character of a “paved street” through retention of the original crowned street profile. This project offered an opportunity to re-think the ground-plane of the Mall as a flatter, more “floor-like” surface with the intention of creating a “public room” like quality. The paving strategy reinforces the width of the mall by utilizing a standard City palette at its edges that transforms to a richer, centralised carpet-runner-like quality arranged in radiating east-west bands, made from a palette of traditional Sydney street stone types.

Team

Tony Caro Architecture Urban Design + Architecture - Lead Designers Tony Caro Project Director Alexander Koll Project Architect Blair Young Project Team Jason Fraser Project Team Louise Chapman Project Team Spackman Mossop + Michaels Landscape Enstruct Structural Engineer – Catenary Haron Robson Electrical Engineer TLB Structural Engineers Warren Smith + Partners Hydraulic (Sanitary) Engineers Traffic & Transport Planning Associates Traffic Engineers Access Australia Universal Access McGregor Westlake Architecture Public Artist AMC+F Furniture Fabricator Westfield Construction Head Contractor QMC Group Civil Contractor FIP Electrical Electrical Contractor 3S Lighting Australia Lighting Fabricator Ronstan Catenary Fabricator Pacific Rigging Catenary Installer

Project Brief

This project’s urban intention was to transform the public domain character and environment of Pitt Street Mall, located in the retail heart of the Sydney Central business district. The head of the Tank Stream, Sydney’s settlement raison d’etre, ran under Pitt Street from its original source, a marsh roughly south of the Market Street intersection. A key move was to relocate the street drainage from the old kerb lines to a central alignment. The new, central drainage channel is an interpretation and expression of this significant item of Sydney’s cultural and social heritage. Subsequently an important element of the brief was to create a custom suite of street furniture. The furniture is made from sand-cast bronze, Austral Black exfoliated granite plinths and re-cycled tallowood. These materials resonate with the material heritage of Sydney’s public domain. In addition to this, an opportunity was identified for a custom public lighting system for the Mall. The catenary lighting project works with the overall conceptual framework for the Mall’s public domain, celebrating the original source of the Tank Stream.

Project Need

This project can be thought of in the following three key areas, The Floor, Furniture and Landscape, and Lighting FLOOR The project has received significant commercial interest from the market regarding the custom designed drainage grate developed by TCA. We were able to work closely with the suppliers, and fabricators to update the standard detailing and enhance the overall aesthetic effect for the project and the manufacturers product line. FURNITURE An important element of the Pitt Street Mall project brief was to create a project specific, custom suite of street furniture, including seats, benches, bubblers, tree grates, and drainage grates. The seating is arranged in a variety of configurations, to create opportunities for the public to sit in groups or individually. LIGHTING The custom public lighting system for Pitt Street Mall was developed, to celebrate its pre-eminent position as the vibrant, dynamic retail heart of Sydney. The catenary is made up of a ribbon of tubular, custom LED luminaries that, when viewed in perspective, create a planar canvas of suspended light in the sky above the Mall floor. The lighting design incorporated a number of innovations in the manufacture and operation of a decorative and statutory lighting system, including power saving technologies, custom detailing of the structure and fittings, and open source programming opportunities for event lighting display.

Design Challenge

FLOOR One of the key design challenges for the floor of the mall was the relative narrowness of the Pitt Street corridor. Pitt Street Mall functions as a collective outdoor room, or plaza space for the adjacent major retail stores and developments. The challenge was to design a space that enabled all of the cross flow of pedestrian traffic to and from the adjacent arcades and retail entries, as well as retaining as sense of singularity, a sense of the Mall as a public room. FURNITURE The design challenge for the furniture in Pitt Street Mall was to create a custom range of seating elements that could: Function in a variety of situations for the public, De-clutter the Mall by absorbing various pieces of infrastructure including power and water outlets for performance and events, Be positioned such that they did not obstruct the cross flows of pedestrian traffic and, Resonate with the material heritage of Sydney’s public domain. LIGHTING The lighting design for Pitt Street Mall was a complex project within a project. TCA worked closely with the manufactures, engineers, and lighting designers to refine the design such that the structure, fixtures and light fittings shared a minimal and elegant aesthetic that is unobtrusive during the day, whilst ensuring that the underlying technology used was capable of providing signature displays for special events, late night shopping, seasonal displays and site specific artworks.

Sustainability

MATERIALS The original drainage box culverts were retained and used as water storage and backcharge prevention. A number of feature Trachyte pavers were installed. These pavers were taken from broken and unusable kerbstones reclaimed from upgrade projects around Sydney. All timber and bronze components of the furniture are certified recycled materials. WATER MANAGEMENT + REUSE The overland flow capacity was increased, and the incidence of flooding in the retail stores to the north of the mall has been reduced. No flooding has occurred since completion of the mall. Existing underground down pipe crossings were connected to retention pits with drip feed water supply to new and existing trees. LANDSCAPE All existing trees were retained through the upgrade with the exception of a small number destroyed by separate Energy Australia upgrades. Additional trees of the same species were added in their place. LIGHTING Statutory lighting switches on only when lighting levels in the mall fall below regulation standards. For most of the evening the statutory lighting is provided by the light emanating from the retail shop fronts. Rather than applying a blanket strategy of drenching the mall in light, photoelectric smart sensors turn on the statutory lighting of the catenary only when the shopfront lights turn off. The decorative catenary lighting array comprises of low energy LED lights.

Tags

• GOV