Gates manufactured for automation should be of a robust and rigid construction providing stability with hinges that are readily maintained.
Steel gates are usually constructed with a box section outer frame, the size of which is determined by the width of the opening.
assembly of gate
Timber gates should be constructed from selected timbers, usually hardwood or pressure impregnated softwood, depending on the overall design and client requirements.

Both steel and timber gates can be made to swing or slide, with sliding timber gates a steel frame is fabricated to support the timber and allow a solid fixing for the drive gear.
click on a gate for more detail