Abstract: A sliding door system having several air sealing structures and mechanisms for use under severe storm condition is disclosed. The sliding door system includes a top and a bottom sealing blocks attached to the top and bottom portions of the door frame, which have block sealing rims on the external walls, and a pair of sealing brackets along the top and bottom portions of the sliding door panel sashes. When the sliding door panel is in a closed condition, the block sealing rims are in direct contact with the sealing brackets to prevent water entrance under a strong wind. The bottom and top portions of the door system along the fixed door panel also have sealing structures to provide air sealing. Moreover, the sliding door system has an interior screen panel, which is protected from the wind at the exterior of the housing.

Abstract: A sliding door system having a removable screen panel track is disclosed. The door frame has a bottom portion, a top portion, a top sliding screen panel track extending along the top side section of the top portion; a bottom rail slot on an outer side of the bottom side section of the bottom portion and extending along the bottom side section; and a removable rail removably attached to the rail slot to form a bottom sliding screen panel track. In one design, the bottom sliding screen panel track and the top sliding screen panel track are positioned in the interior side of the door frame, and a sliding screen panel is installed between the tracks in the interior of the door system. The removable screen panel track can also be positioned at the exterior side of the door system.