In an example an overhead door track is provided. The overhead door track includes a vertical track section having an opening to receive a roller of a panel of an overhead door and to guide movement of the roller within the opening and a single solid polymer based vibration isolator coupled to the vertical track section to reduce vibration of the vertical track section caused by movement of the roller within the opening.

A closure may include a door configured to seal an opening. The door may include a section with an internal cavity. The closure may also include a core within a first portion of the internal cavity of the section. The core may be configured to expand from a relaxed state to an expanded state and provide a seal between the door and an edge of the opening when the core is in the expanded state.

A roll-up door with fall protection preferably includes a door web, a pair of guide tracks, a pair of lower track brackets, a plurality of upper track brackets and a door web roller. The door web includes a plurality of screen web panels and wind bars. Opposing ends of the door web are retained in the pair of guide tracks. A first wind bar is arraigned to be 42 inches off a floor to meet OSHA fall protection standards. The door web includes at least two upper wind bars above the first wind bar and at least one lower wind bar below the first wind bar. The pair of guide tracks are secured to a wall with the pair of lower track brackets and the plurality of upper track brackets. A top of the pair of lower track brackets are located at least 42 inches above the floor.

A barrier system includes a roll-up barrier comprising a plurality of slats hingedly connected, a guide system, and a drive system. Each slat of the plurality of slats includes a central portion having a first thickness, a top portion, and a bottom portion. At least one of the top portion or the bottom portion having a second thickness less than the first thickness. The top portion of each slat overlaps the bottom portion of an adjacent slat forming an overlapping region having the first thickness when the barrier is in a closed configuration. The guide system is configured to guide movement of the roll-up barrier. The drive system configured to transition the roll-up barrier between open and closed configurations along the guide system.

A roller shutter may include a rotatable drum; a shutter curtain including a series of three or more elongate slats pivotally interlocked in a longitudinal-edge-to-longitudinal-edge arrangement and arranged parallel to the rotatable drum, wherein a first and second longitudinal end portions of each elongate slat may be respectively aligned to form a first side border and a second side border, respectively, of the shutter curtain, wherein the first and second longitudinal end portions of each elongate slat may be respectively provided with at least one eyelet-structure which protrudes therefrom, whereby a first and second rows of eyelet-structures are formed along the first and second side borders; and at least a first cord and a second cord respectively strung loosely through all eyelet-structures of respective row of eyelet-structures, and each cord may be configured to confine all eyelet-structures of the respective row of eyelet-structures within a length of each cord.

A turnover device comprises a first turnover piece, a second turnover piece, a first pull rod and a second pull rod. The turnover device is immobilized upon impactor pull from the bottom. When a plurality of the first and the second turnover pieces are connected alternately, the second and the first turnover pieces are turned over one after another. A slotless rolling shutter door comprises two turnover devices which are arranged on two sides of the door body and can replace existing door slots formed in a wall body. The door body, with an improved appearance, is fixed without arranging the door slots in the wall body. When opening the door body, a door body winding device winds the turnover devices with door pieces to finally collect the door body and the turnover devices therein.

In example implementations, a windlock is provided. The windlock includes a body, a windlock lip, and a gusset. The body includes holes to receive a fastener to be coupled to a slat of a roll-up door. The windlock lip is formed from a portion of the body that is bent from the body. The gusset is coupled to the body and the windlock to provide mechanical strength to the windlock lip.

In example implementations, a universal endlock is provided. The universal endlock includes a body, a first side along a first edge of the body, a second side along a second edge of the body opposite the first edge, a first lip on a first end of the first side, and a second lip on a first end of the second side. The body includes an intersecting hole pattern on a center portion of the body. The first side and the second side are each bent towards a back side of the body. The first lip is bent away from a first edge of the body and the second lip is bent away from the second edge of the body.

A slat assembly may include a slat having a first and second receiving portion. The first and second receiving portions being a pair of bent portions forming an acute angle. The slat assembly may further include an insulation layer lined on the slat. The slat assembly may further include a retaining mechanism disposed on the insulation layer to press a first portion of the insulation layer into the first receiving portion of the slat and to press a second portion of the insulation layer into the second receiving portion of the slat such that the retaining mechanism may cooperate with the first and second receiving portions to hold the insulation layer between the retaining mechanism and the slat without puncturing or penetrating the insulation layer with fasteners. A roller shutter including the slat assembly. A method of manufacturing a slat assembly and a method of manufacturing a roller shutter.

A closure may include a door configured to seal an opening. The door may include a section with an internal cavity. The closure may also include a core within a first portion of the internal cavity of the section. The core may be configured to expand from a relaxed state to an expanded state and provide a seal between the door and an edge of the opening when the core is in the expanded state.