The displacement device includes a guide carriage that is slidable along a running rail and that is pivotally connectable to a first separation element. The guide carriage includes a carriage body with a carriage head and a carriage foot, which carriage head and carriage foot are connected with one another by a connecting beam, wherein the carriage head holds at least one support wheel and at least two guide wheels and wherein the carriage foot is connected torque proof with a first end piece of a hinge lever, whose second end piece is pivotally held by a hinge shaft that is connectable to a sidewall of the first separation element.

A hinge assembly comprising a first hinge leaf assembly and a second hinge leaf assembly, each having their respective hinge leaf. The hinge assembly further comprises at least one mounting member fixable to a moveable barrier through a fixing arrangement. The first and/or second hinge leaf is connectable to the at least one mounting member so as to be adjustable relative thereto. A locking arrangement is also included to releasably lock the first and/or second hinge leaf to the at least one mounting member. The locking arrangement is operative to adopt a hold condition where relative movement between the first and/or second hinge leaf and the at least one mounting member is prevented, and a released condition where the first and/or second hinge leaf is able to be adjusted relative to the at least one mounting member.

A load-bearing accessory includes a hinge, a frame and a connector. The frame includes an adjustment portion and a support portion. The distance between the adjustment portion and the support portion is adjustable. A first end of the connector is connected to the hinge, and a second end of the connector is connected to the adjustment portion. One of the hinge or the frame that is located at the upper position of the load-bearing accessory is configured to support the connector, and the connector is configured to support the other one of the hinge or the frame that is located at the lower position of the load-bearing accessory.

Methods and apparatus for sliding panel door seal adjustment and calibration are disclosed. An example apparatus includes: a first plate including a slot through which a first threaded fastener is to connect to a door panel; a second plate to be between the first plate and a head of the first threaded fastener when the first threaded fastener is connected to the door panel; and a second threaded fastener to couple the first and second plates so that rotation of the second threaded fastener results in movement of the second plate and the connected door panel relative to the first plate.

Folding door systems, methods and devices includes a first door panel, a second door panel, and an astragal mounted to the first panel. A concealed hinge block is embedded within the astragal and provides a vertically adjustable base for a pin knuckle that couples to a receiver knuckle on the second panel. An integrated shoot bolt actuator system that drives bolts into a header and sill to secure the panels in a closed position operates around the hinge block. A worm gear-based adjuster mechanism within a receiver knuckle enables fine alignment between the two door panels in relation to the hinge knuckle. The system conceals all fasteners and actuator components within the astragal, supporting both inswing and outswing configurations. The modular architecture improves field adjustability, enhances aesthetics, and maintains compatibility with standard door panel constructions while enabling the panels to fold fully open against one another for maximum clear opening.