a space the same width of the opening, to slide back into.
what this means, is that for an opening of say 4m, the gate will need a 4m space to one side, to slide into, to allow the gate to open the full width. quite often, the gate is sliding back along a wall or hedge.
however, what happens if our opening is 4m wide, but you only have 2.5 or 3m of space to slide it back into? if you had a 3m space - that would mean that your regular sliding gate would not be able to open fully (as it is a 4m wide opening and you only 