There is no track on the ground. The tubular track is either welded or screwed to the gate. The gate slides on two carriages, which are fixed on a concrete block located on the push back side. According to the opening position of the gate, the carriages are in contact with either the upper or the lower part of the track to ensure a perfect balance. The wheels are in constant contact with the top and the bottom of the track limiting the clearance to a minimum (PAF series). PAF series carriages are strongly recommanded for motorized gates.
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