Cornerstone – taking on the challenges
Auckland based Cornerstone Demolition has just completed its ﬁrst bridge demolition project. Company operations manager Karly Cho says that it was coming up with the right strategy that was a key factor in the success of the project – the demolition of part of the Orams Road bridge in Manukau which sits over the Southern Motorway.
Cornerstone Demolition completed the project at night so keeping within strict time frames was essential, she says.
Main contractor CPV liaised with the New Zealand Transport Agency to close parts of the motorway as required.
Cornerstone Demolition used a Diamond wire saw – which can be operated remotely – to slice through sections that were then lifted away onto a transporter.
Karly says this methodology ensured there was no damage to the asphalt underneath the bridge from falling debris and also minimised noise for nearby residents as the equipment used was quiet.
She says the project demonstrates the ability of Cornerstone Demolition to successfully liaise with clients to complete complicated projects within set time frames.
Cornerstone Demolition is a Korean owned company started in 2013. It comes from a history of completing similar projects in Korea over many decades.
Based in Henderson, Auckland, Cornerstone Demolition has an ofﬁce and yard from which it sells salvaged materials. Karly says the company aim is always to recycle as much material as it can from sites.
Cornerstone Demolition also imports Daewoo excavators to order and sells parts such as air ﬁlters, fuel ﬁlters, engine oil ﬁlters, diesel ﬁlters, o-ring kits and seal kits for Japanese and Korean brand excavators such as Hitachi, Daewoo and Kobelco.
Karly says it is the company’s long history of working in demolition and the subsequent experience amassed that sets it apart.
“We bring successful technology and strategies from overseas which has helped us to deliver many successful projects in New Zealand,” she says.
“We aim to liaise with the client through the tender process so that we can identify any opportunities to save costs for the client and come up with the best methodology for each project.”
Another signiﬁcant project for the company demonstrating its versatility and problem solving ability was the Reserve Bank building demolition project in central Auckland.
Cornerstone Demolition demolished the internal ﬁt-out taking the building back to a base build as well as demolish a small building next door.
Karly says the most challenging part of the project was the demolition of a vault with concrete more than three metres thick and also lined with 20 centimetre thick steel.
The Diamond wire saw once again proved invaluable and it was used to slice through the tricky materials for removal. Once outside the material could be demolished and broken down.
Demonstrating its versatility the company also completed around 250 cubic metres of contaminated soil removal for the Takanini motorway project.
Karly says strict methodology and health and safety protocols were essential and saw the material removed with air monitoring revealing zero impact.
Cornerstone Demolition has certainly grown since its inception with many clients coming to the company by word of mouth.
Karly says the aim is further growth to cement the position of Cornerstone Demolition in the Auckland market. There are also plans to open a branch in Hamilton later this year.