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Home Features

How engineers brought new life to this historic site in the heart of Melbourne

Edie-Louise Diemar by Edie-Louise Diemar
17 November 2020
in Features, Projects
4 min read
1
The site at 271 Spring Street was home to a secret drinking den in the 1920s

The site at 271 Spring Street was home to a secret drinking den in the 1920s.

Building on historical sites can be a difficult task at the best of times, but for the engineers working on 271 Spring Street, it was a case of tackling the near impossible.

Melbourne’s Lonsdale precinct is home to some of the city’s oldest buildings, many with their own wonderfully colourful backgrounds. This includes what is now 271 Spring Street, but was once home to a women’s shelter and also contained a secret drinking den in the 1920s. 

Fast forward a century and the location now boasts a 16-storey commercial building above the 19th-century facade. The development recently won an Australian Engineering Excellence Award.

A render showing 271 Spring Street above the City Loop tunnels.
A render showing 271 Spring Street above the City Loop tunnels.

It wasn’t an easy ride, but developers ISPT saw potential in the site, which had sat untouched for almost two decades. With design partners John Wardle Architects, ISPT approached sustainable engineering group Arup to turn the site into a financially viable building project while preserving the historical significance of the location.

But the challenge wasn’t only in preserving the heritage — directly beneath 271 Spring Street are the double-stacked City Loop rail tunnels, while above is an electrical substation. 

“It was a really exciting challenge as a structural engineer,” Arup project director and lead structural engineer Richard Salter MIEAust CPEng told create.

“We had all these constraints. How do you bring the building to ground when you’ve got these easements, heritage constraints, these tunnels? So when we were playing with these ideas we really had to think from the ground up.”

Back in time

271 Spring Street was originally two buildings: the Church of England Mission Hall, built between 1894 and 1913, and the Elms Hotel, built in 1924. Both buildings are heritage listed, so any development on the site had to take care to protect the current facades.

The Mission Hall (left) and the Elms Hotel.

“There was a requirement for an archeological dig on the site,” Salter said. 

“We knew the Mission building supported women and children, but we also knew there were supposedly drinking dens and brothels in the structures at the back around the turn of the 20th century.

“A team went in and uncovered all these wine and champagne bottles, old coins, all that sort of thing. Seeing that really reminded us just how important the site is historically.”

Due to that significance, the 271 Spring Street project had to undergo heritage and community consultation, Salter said, with the heritage input in particular informing the final design of the structure and facade.

Big building, little footprint

The project team engaged structural and geotechnical engineers in the early phase to figure out how they could build on the site.

“We went down there and did geotechnical testing to understand the ground conditions,” Salter said. 

“We had all the data on the City Loop tunnels and the easements, so we started analysing the ground structure interaction.

“When you’ve got a building, you’ve obviously got a dead weight, but when it’s undergoing dynamic lateral and rotational forces in the case of an earthquake or extreme wind loading, where do all those loads go? How do they find their way into the ground and what impacts do they have on the tunnels?”

“It was an exciting challenge as a structural engineer. We had all these constraints and really had to think from the ground up.”
Richard Salter MIEAust CPEng

The engineers developed ground plane maps that outlined where building could occur, which areas had limited capacity and which areas were no-go zones. This helped create a foundation that redirects load to areas with the capacity to hold it.

“We went through a long list of different forms and materiality options for the superstructure, different options for the foundations, and settled on a steel composite structure which was very lightweight,” Salter said.

“In a traditional building, you typically have the stability core as centrally as possible in order to localise and withstand the applied loads. Instead, we needed to distribute those loads between a small core and very deliberately located bracing around the perimeter of the building; all of which needed to come to ground in certain discrete locations where we could put higher loads.”

Bringing it into the 21st century

A key component of any new development was the need to ensure the existing buildings would meet the latest safety standards. The Mission building needed its floor replacing, in addition to various discrete intrusions to ensure alignment with current earthquake regulations.

As the developer ISPT also sought to create a sustainable end product, Salter said the team engaged engineers from multiple disciplines to ensure the sustainability of the building, which ultimately comfortably achieved a Five Star Green Star rating.

“We had really aggressive sustainability targets, so we had to be really smart about the performance of the facade,” Salter said.

“The western part of the facade gets a lot of sun, for example, so we needed to ensure the shading and glazing specification responded to that. 

“There’s a whole lot of fascinating angular facades around the building — some of that is architectural, but a lot of it’s also about performance and how you reflect off the sun’s heat. And that enables a more efficient building services system, because you’re not having to fight against that heat, which [would] to jack up your air conditioning.”

Salter said the Arup team members were proud of the end result and their ability to bring new life to such an historic site.

“We worked on this project for almost 10 years, from inception through to completion,” he said. 

“It was such a complex and interesting project and we were really excited to be involved.” 

Discover more of the 2020 Australian Engineering Excellence Award winners here.

Tags: heritage engineeringinfrastructurestructural engineeringbuildingArupAustralian Engineering Excellence Awards
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Edie-Louise Diemar

Edie-Louise Diemar

Edie-Louise Diemar is a journalist who has spent most of her career writing for associations big and small. She spends her time out of work listening to podcasts and trying to get her cat to love her.

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Comments 1

  1. Yee Yang (James) Tee says:
    11 months ago

    I am glad I was involved with this project from the start of the design development to the construction stage with a main facade contractor, Lingyun Australia. I am proud to work with the architect, Wardle Studio, the builder, Probuild, the independent certifier engineer, inhabit and the ARUP consultant.

    During the design and construction phase of this project, there were many ups and downs, which made the engineering and installation of the exterior cladding of the building very challenging.

    I am proud that this building got awarded with the Commercial Development of the Year at the 2019 Urban Developer Awards!

    Reply

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