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06/03/2006
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With its excellent strength-to-weight ratio, pleasing aesthetics and flexibility of design, extruded aluminium is becoming the preferred material for many design engineers. Dean Palmer looks at two novel applications
A novel system that uses a telescopic system of extruded aluminium beams to open up the loft space of trussed roofs has been developed by a British inventor.
Digby Rowsell, inventor of the 'TeleBeam' system, said that the choice of using extruded aluminium (supplied by Hydro Aluminium Extrusion) was "straightforward because the material's strength-to-weight ratio means it is relatively light, easy to handle and can be manoeuvred into place in existing roof spaces where there is often restricted room". He also pointed out that the material's "aesthetic appearance was a bonus" and that "the extrusion process kept fabrication to an absolute minimum, thereby keeping costs down."
TeleBeam is simple and inexpensive compared to traditional loft conversion techniques. It is based on a series of extendable braces, each comprising a main aluminium central box section from which 'I' beams outriggers extend at either end. These are suitable for any pitch of roof and adjust to a span of up to 7m from outside wall to outside wall. Rowsell said that an 8m version was is currently being considered.
The beams, which are LABC-approved, incorporate roof and floor support in the extrusion and minimise the loss of headroom, with flooring being fixed directly to the box beams without the need for timber joists.
As existing braces are not removed until the new system is in place, TeleBeam does not rely on any temporary internal propping or supports. The beams can be cut and trimmed out with standard joist hangars. Fitting is more accessible than traditional methods as it involves no specialist skills or tools and can even be carried out by competent 'DIYers' with construction experience. TeleBeam is installed from scaffolding erected on one side of the house and only requires the removal of three rows of roof tiles at the eaves.
TeleBeam eliminates the many 'W' trusses that are a common feature of the roofs in most modern homes, particularly those built after 1970. The new loft conversion system is a simple, cost effective method of unlocking the space and potential for expansion in many people's homes.
But why choose Hydro Aluminium? Rowsell explained: "Hydro was my choice of manufacturer because the company impressed me with its experience and attitude, its size and resources and the assistance it offered in the early stages of the development of TeleBeam."
Another novel application of aluminium extrusions is in the design of shower cubicles manufactured by UK company Fabricon Precision.
Fabricon's cubicles are aimed primarily at the disabled market and the firm's new suite uses around 30 separate aluminium extrusions from Hydro.
The cubicles offer several special features to the end user and installer. It is easier to fit and more ergonomic, lending itself to several different design options to cater for the diverse needs within the disabled market.
The aluminium itself is used in the shower cubicles and doors, which can be bought separately. Aluminium extrusions were used because of their flexibility and ability to be designed to suit other key features which can be added for assembly. Extrusions also come in a variety of finishes and are easy to handle and machine.
Mark Bushdyan of Fabricon commented: "We've been with Hydro almost since the beginning, for 15 or 16 years, and the company has been very helpful. We have an exceptional working relationship."
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Author
Tom Shelley
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