28' Sliding Door in 50' Wall? - Page 2
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  1. #21
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    Dec 2007
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    Swinging bi-fold doors with powered steering wheels at the end and intermediate hinge. Parking brakes will prevent wind-blown closure. Steering path is left as an exercise for the reader.

    Or, accordian sections, again with powered wheels, and drop-down threshold seals to be activated when closed. Lots of clearance to tolerate debris, but dropping the seal and latching the mating edges to the center roof locks things in place.

    Keeping the accordian doors straight without an overhead track involves placing the rollers on the edge of the door opening and at building edge, and the tracks on the outermost door. Then rollers on the outermost door for the tracks on the inner door... All open = no tracks. A guide slot can help ensure alignment at the bottom.

  2. #22
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    I am thinking of those fence gates that roll or slide to the side. Some are completely supported by rollers on the gates and a track on the poles and others have rubber wheels under the gate to support the weight. You would install such rollers and wheels on the two door segments. The doors would slide/roll just under the crane tracks and there would be one or more small, additional panels on horizontal hinges above the crane tracks to allow clearance for the crane to operate. With some clever design, those additional panels could be pushed open by the crane and closed by gravity when the crane is retracted, inside the building. This could probably be done with fence hardware, using multiple rollers and tracks (top, bottom, and perhaps even center) to support the weight of the doors.

    You have a 28 foot opening in a 50 foot wall. So two 15' panels would work. But the walls on each side of the doorway will be about 11' so those panels will have to stick out somewhat when they are open. I would add an outboard roller to allow for keeping them straight and lined up when they close. That outboard roller would extend around 10' so that, with two rollers on the door proper and that third, outboard roller, at least two rollers that are about 10' apart would always ride that track. I am envisioning this track, which is on the doors themselves, as being made from fence pipe/tubing which would fit the fence style rollers. But, of course, other types of track and rollers could be used and could be more compact.

    A lock that draws the two doors tightly together at the center would be a definite advantage to strengthen it.

    Google sliding or rolling fence gates.

  3. #23
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    If this is all inside have you considered just building wall panels that you move around with a forklift?


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