Product category:
Steel and Structural Frames
News Release from: Lindapter | Subject: Steelwork fixings
Edited by the Buildingtalk Editorial
Team on 27 September 2007
Steelwork fixings in longest Australian
tunnel
Lindapter steelwork clamps are simplifying the construction of the on/off ramps needed for the Brisbane North South Bypass Tunnel project.
Lindapter steelwork clamps are simplifying the construction of the on/off ramps needed for the Brisbane North South Bypass Tunnel project When completed, this 6.8 km long construction will be the longest tunnel in Australia
This article was originally published on Buildingtalk on 8 Jun 2007 at 8.00am (UK)
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The piers that support the ramps are being made by the formwork and scaffolding specialists PERI Australia, and consist of a headstock supported by two columns.
The headstocks are fabricated in situ, by pouring concrete into pre-assembled formwork.
The formwork is positioned into place on top of the columns with the aid of some simple supporting steelwork.
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Bolt-on Lindapter clamps were selected as the means of assembling this girder-based supporting structure because they attach without the need to drill holes.
The clamps may be moved easily, and this flexibility is critical, as the pier length and column spacings vary throughout the course of the ramps.
As soon as the concrete gains enough strength, the formwork and support steelwork is stripped away, and adjusted to the dimensions needed to fabricate the following pier.
"Lindapter clamps have helped us create very cost-effective tooling for fabricating the piers required on this major project," says Fred Dagandan, Design Engineer with PERI Australia Pty Limited.
"Their ease of assembly, disassembly and adjustment, combined with special flexibility we have built into our formworks, means that we can quickly recycle".
"On this project, a total of some 60 piers are being constructed using just two sets of formworks".
M20-bolted Lindapter clamps were used on the project, to support the large loads required during construction.
During the fabrication of a pier, the total vertical load of the support steelwork, formwork, steel reinforcement, and fresh concrete is approximately 100 tonnes.
A combination of conventional and high-friction Lindapter clamps are used to assemble the steelwork.
The M20 high friction clamps support safe working frictional loads of 16 kN per pair of bolts, and tensile loads of 26.25 kN per bolt.
During the course of this project, each Lindapter clamp will be reused approximately 30 times.
Lindapter has been producing advanced fixing products that offer cost-effective alternatives to traditional methods for more than 70 years.
Key market sectors include structural engineering, civil engineering, building services, process plant/offshore, mechanical handling and transportation.
Initially recognised as the manufacturer of the Lindapter malleable iron hook-bolt adapter, the company has diversified to cover all aspects of fixing to or suspending from structural steelwork.
As well as cavity fixings, the Lindapter range includes steelwork fixings, support fixings, floor fixings and rail fixings.
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