CSP’s Super•Cor™ Arch - cost effective and fish friendly

A new subdivision in Flat Bush has seen the first installation in the Auckland region of CSP’s Super•Cor™ Arch – a super strong, galvanized steel structure - to enable access across a stream on the development. The Super•Cor™ Arch was chosen because of its cost effectiveness and the fact that it could be installed without disturbing the stream bed or the fish.

“This subdivision on Murphy’s Road in Flat Bush will eventually include about 400 sections,” says Andrew Hunter, Consulting Engineer for McKenzie & Co, the consultants for the development. “There is a stream that is 220m into the development that needs to be protected and crossed to access the land on the other side. Originally the Council required the construction of a bridge to span the stream to allow for a two-lane carriageway and a dedicated walkway on either side, but this option would have been much costlier.”

Consideration was then given to using a concrete box culvert, which would have meant considerable disruption to the stream bed. “The Council preferred we find a solution that would protect the stream,” explains Andrew. “It doesn’t have a large volume of fast flowing water but it does contain a few species of native fish. Our challenge was to find a solution that protected the stream, satisfied Council requirements, was economically acceptable to the client and would be an asset to the development.”

“The stream gully is quite incised and we wanted to stay out of the flood plain,” adds Andrew. “CSP’s Super•Cor™ Arch offered the scale, height and width required.”

“Super•Cor™ structures are designed to the AS/NZS2041.1 Standard, which includes very thorough durability design and testing that enable such structures to have a 100-year design life,” says Bruce Stephens,
 Regional Sales Engineer for CSP. “Murphys Park Development choose the Super•Cor™ Arch option due to it being economical and preserving the stream bed..”

After investigating and familiarising themselves with the Super•Cor™ Arch option the Council was satisfied it would perform and gave approval to proceed.

Jason Anderson, Structures Manager for Dempsey Wood, was asked to install the 23m long structure. “This is the first steel plate structure I have installed and I have to say it went together really well,” he says. “It had over 3000 pre-drilled holes which needed to be aligned. I was pleasantly surprised - it went together without a hitch and quicker than expected. It's a really simple design and, now I have installed the first one, I am a real fan. Once completed it’s also going to look amazing.”

Super•Cor™ fast facts

Combining the advantages of lightweight construction with the superior strength and durability of galvanized steel, Super•Cor™ is the most internationally accepted and widely used corrugation profile on the market.

The larger annular corrugations of Super•Cor™ (381mm pitch and 140mm depth) provide nine times the stiffness of conventional structural plate.

Super•Cor™ is the sensible economic choice for:

  • Vehicle underpasses
  • Bridges
  • Railway underpasses
  • Box culverts
  • Underground storage
  • Stream enclosures/crossings
  • Fauna underpasses
  • Mine portals
Principle:Murphys Park Development
Contractor:Dempsey Wood
Consultant:McKenzie & Co Consultants Ltd
Location:Murphy’s Road Flatbush, East Auckland
Product:Super•Cor™ - Box, Arch and Round structures
DateFebruary 2017

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