STRUCTURE CLOSURE SYSTEM

摘要

A door structure and system is provided for an opening (22) in a structure and particularly a large opening such as an opening in an aircraft hangar. The structure includes first (4) and second (18) layers, the first layer formed substantially of sheet material and the second layer typically having apertures therein such as netting. The second layer is typically located behind the first layer and in a closed condition when the first layer is moved between open and closed conditions to prevent the first layer from being blown into the structure and causing damage.