Not all about the look

National Precast member PERMAcast employed a unique, non-conventional method of precast concrete production to create the seating for Perth’s Elizabeth Quay redevelopment.Recognised for its stunning design outcomes and inherent durability benefits, precast concrete is increasingly being used for outdoor furniture in public spaces around the world. It was the choice for seating at Perth’s redevelopment of the Elizabeth Quay area in the heart of the city.

The aim of the redevelopment was to create a waterfront precinct to become the city’s ultimate riverfront destination. It will eventually include multi-storey hotels, apartments and office spaces, but the new public spaces are already drawing crowds and helping revitalise the city centre.

Curved to follow the quay

Local precast manufacturer and National Precast member PERMAcast was contracted to produce seating for this impressive redevelopment. The project required 450 metres of seating, with varying radius curves to follow the irregular shape of the quay.

PERMAcast’s Managing Director Alberto Ferraro says over a four-month period, the company produced more than 200 straight and 100 curved seating units, with more than 50 different lengths and eight different curves.

Outside the square moulds 

Mr. Ferraro explains that a cost effective but non-conventional method of production was used.

“Usually our moulds are made from steel but this time we went with an alternative and used concrete moulds. It’s the first time we’ve done that, but it allowed us to produce more moulds to increase the volume of output at a cheaper cost,” he says.

The seating units were manufactured using a concrete mix that included a special stone selected for its particular aesthetic.

“The architect wanted a unique look so we used special Muckinbudin quartz, from the small town of Muckinbudin about 300 kilometres from Perth,” says Mr. Ferraro.

A high class, low maintenance finish was also required, so the seats were polished.

“Once the units were polished, we applied a special protection coating. It’s anti-stain and anti-graffiti to protect the finish of the concrete from damaging elements and people,” he adds.

Design only possible with precast 

Precast concrete was an ideal solution for the project for many reasons. According to Mr. Ferraro, an in-situ concrete pour would’ve been virtually impossible and compromised the design and vision. “The fact that it was being manufactured off site meant on-site works could continue. We produced the seats so they could be dropped in when the site was ready,” he says.

The seats were stored undercover at the manufacturer’s storage facility until delivery was required.

50-year furniture

As well as the logistical benefits, the precast seating units have other advantages.

“From a visual perspective the precast seats look fantastic. But they are also extremely durable and low maintenance. They are designed to last more than 50 years,” says Mr. Ferraro.

He says it was a satisfying project for the precast team and one they will be proud of for years to come.

“Being in a high profile, and high exposure area in the city, where people are gathering for years to come for big events, it’s good to see the public enjoy some of our work.”

Precast Manufacturer: PERMAcast

Contractor: Denmac

Client: Metropolitan Redevelopment Authority

Architect: Taylor Cullity Lethlean

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