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Sectional doors are upward acting doors made of horizontally placed panels |
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The sections are fixed together by heavy duty galvanised hinges. |
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The hoist rollers, mounted in adjustable side hinges assure a smooth movement in the track guides. |
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Nylon track rollers with steel ball bearings assure a silent movement of the door. |
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Guide tracks are placed on both sides of the door opening. The tracks can curb horizontally or go on vertically depending on the available headroom. |
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The door weight is counterbalanced by heavy duty, oil tempered wire torsion springs on continuous ball bearing cross header shaft. The springs are guaranteed for 20.000 cycles. |
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Die cast aluminium drums receive high strength galvanised aircraft cables with a minimum of 7 to 1 safety factor. |
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Galvanised steel bottom brackets make the junction between the cables and the door panels. |
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A black ABS lift handle / step plate is mounted into the bottom section of the door, standard on the right side seen from the inside. |
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Small doors are operated by pull down rope. Chain hoists or electrical operators are available as option. |
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Inside spring loaded slide bolt lock or exterior cylinder lock on end stile shall engage steel bar in the track. |
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Bottom of door has flexible tube seal with double lip in aluminium retainer. Perimeter lip seals on both jambs and top of the door. Between sections is a foam seal. |