All polyhouses use large diameter, high tensile steel tube manufactured by our UK steel suppliers to Z35 specification. This means that it has a much higher bending resistance than standard mild steel tube and is therefore stronger in use. The large diameters give additional strength for resistance to wind and snow loads. Most foundation tubes have a 2mm plus wall thickness.
The foundation tubes are a key part of the polyhouse and it is vital to ensure maximum strength in this area. All tube is galvanised inside and out for maximum corrosion prevention. In normal conditions we have seen our polyhouses exhibit little serious corrosion even after 20 years use.
Fordingbridge pioneered the use of swaged joint systems in polyhouse design and use this extensively throughout our polyhouses. A swage is where the tube end is reduced in diameter for approximately 100mm along its length. This allows tubes to sleeve together giving a low cost, extremely strong joint which is fast to assemble. The foundation tubes to hoops; the hoops themselves and the ridge and cross braces use this swage system. All polyhouses have corner wind brace diagonals and most have an additional gable end roof diagonal support.
Our investment in a tailor made CAD drawing computer packages enables us to offer assistance with planning applications. We can supply scale drawings of our structures to submit with your application and these are available on request. This service has been used by both major household name PLC groups and one person, one tunnel enterprises. Fordingbridge have manufactured a wide range of multispan structures for over 30 years.
The range is now the largest available, from low cost twinspans to the highest specification multispans.