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In seeking to offer a competitive proposal Duffy Construction approached Hy-Ten, about the application of finite element (FE) analysis and Bamtec reinforcement to the floor plates. Hy-ten refereed them to Qube Design an independent structural design consultancy that is familiar with the application of FE analysis and Bamtec reinforcement. Qube's calculations were subsequently verified by project structural engineers Walsh Associates.
Application of Hy-Ten’s Bamtec system starts with the use of FE analysis to precisely define the zones of stress within the floor plate and around the vertical columns. Hy-Ten have a greater range of re-bar sizes available, allowing more precise specification of structural steel requirements. Reduction in the quantity of steel needed reduces proportionately the embedded energy in the structure, calculated to be equal to a 42 carbon tonne saving.
The FE analysis data was ported to robotised welding machines in the Hy-Ten factory where reinforcement carpets were produced by precision spot welding each re-bar to flexible steel tapes in the precise position required. Tagged and colour coded to indicate both the position and depth in the floor slab, in accordance with the engineer’s floor plan, the reinforcement carpets were shipped to site in sequence to meet Duffy’s stringent fixing and casting programme.
On site, the reinforcement carpets were positioned and simply rolled out in a simple two-man operation. The need for back-breaking labour to manually position and wire-in each bar is eliminated by Bamtec steel reinforcement. Continual referral back to the engineer’s drawings is not needed as once the carpet is correctly placed all the re-bars on the roll are automatically positioned accurately. Once the carpets are in place supplementary steel bars may be located manually according to the engineer’s instructions.
Bamtec enabled Duffy to save 30 percent on labour and still complete each floor plate in less time than with conventional methods. The Bamtec system is greatly appreciated by re-bar fixers who are less prone to back strain and injury.
Richard Webster, Director, Tel. +44 (0)151 525 1745 Fax. +44 (0)151 523 2252
E-mail: firstname.lastname@example.org Web: http://www.hy-
Hy-Ten Ltd, Bridle Road, Bootle, Merseyside, L30 4UG, UK
Images are on the web at http://www.ainsmag.co.uk/
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Bamtec is a system of steel reinforcement for flat concrete slabs developed in Germany. Hy-Ten, one of the UK’s major reinforcement manufacturers, is the exclusive supplier of Bamtec in the UK and Ireland. The system gives significant savings in steel, manpower and time, allowing contracts to proceed more efficiently.