https://www.dooronthego.ca/

Only viewable, underside sliding hangar doors which may be installed on just about any kind of construction to save space and money. Single-stack door system is given for aircraft hangars, T- hangars, agricultural and industrial structures as well as for drifting barges! When managed manually, these doorways slide in precisely the same fashion as all moving doorways, except that they shut in 1 direction and available on the contrary direction. They "pile" at one end, and it will be suggested to be a wing wall mounted or partly constructed beyond the building to put away the doorways while the full width of this drop is used for launching. In instances where distance isn't available on each side of the opening, a wall is required to pile the doorways with the door shut.