The present disclosure provides an aircraft security door as well as methods, systems and apparatus for handling an aircraft security door. In one implementation, a method for installing an aircraft security door onto an aircraft is disclosed. The method includes transferring the aircraft security door to an aircraft service stair, supporting the aircraft security door by a bridge crane coupled to the aircraft service stair, positioning the aircraft service stair in proximity to a fuselage of the aircraft adjacent to an opening in the fuselage, positioning the aircraft security door relative to the opening using the bridge crane, and securing the aircraft security door to the opening.

The present disclosure provides an aircraft security door as well as methods, systems and apparatus for handling an aircraft security door. In one implementation, a method for installing an aircraft security door onto an aircraft is disclosed. The method includes transferring the aircraft security door to an aircraft service stair, supporting the aircraft security door by a bridge crane coupled to the aircraft service stair, positioning the aircraft service stair in proximity to a fuselage of the aircraft adjacent to an opening in the fuselage, positioning the aircraft security door relative to the opening using the bridge crane, and securing the aircraft security door to the opening.

An overhead rail system includes a hollow tube having a channel running longitudinally along a bottom surface of the overhead rail. A stopper for use in the overhead rail, includes a base having a thickness less than a width of the channel of the overhead rail, a base length, a base width, and first and second countersunk threaded holes. The base further includes a pair of wings having a length greater than a width. The wings are rotatably attached to ends of the base and are rotatable approximately 90 degrees between a first position and a second position. Bolts may attach a stopper portion including a stopper base, and bumper base, and a bumper. The bolts further prevent rotation of the wings, thus securing the stopper in the overhead rail.

Methods and apparatus for constructing or reconstructing refractory structures, e.g., glass furnace regenerator structures and/or glass furnace structures having walls formed of refractory block and buck stays externally supporting the walls are provided. A header support beam assembly is provided so as to extend at an angle between respective pairs of side wall buckstays. A moveable hoist moveable hoist supporting assembly supported by the header support beam assembly and moveable between the opposed pairs of side and end walls. In such a manner, refractory components, e.g., refractory wall blocks and/or checker bricks, may be hoisted into position when constructing or reconstructing the refractory structure.

The invention provides a crane assembly for lifting a load comprising: a pair of guides (2) positioned parallel to one another; a carriage (4,40) associated with each guide (2) and movable along each guide (2); a bridge (1) having an attachment point (8) for attaching the load, the bridge (1) being attached between the carriages (4,40) through connector arms (3), each connector arm (3) being attached through a lower end (31) to the bridge (1) and pivotable (5) at least about an axis perpendicular to the bridge, each connector arm (3) being attached at an upper end (32) to the corresponding carriage (4,40) through a multi-axis joint (33,35); wherein each multiaxis joint (33,35) is connected to the corresponding carriage (4,40) through a low friction thrust bearing (6) configured to rotate with initial movement of the corresponding carriage (4,40).

The present disclosure provides a device for fixing a gantry crane rail in a factory building and a gantry crane system using the same. The device comprises a main body, which comprises a top portion, a first surface and a second surface opposite the first surface. The top portion is fixed to a bottom surface of a beam of the factory building, and the first surface and the second surface are substantially parallel to the crane rail. The device further comprises a first protruded support positioned on the first surface and a second protruded support positioned on the second surface.

The present disclosure provides a device for fixing a gantry crane rail in a factory building and a gantry crane system using the same. The device comprises a main body, which comprises a top portion, a first surface and a second surface opposite the first surface. The top portion is fixed to a bottom surface of a beam of the factory building, and the first surface and the second surface are substantially parallel to the crane rail. The device further comprises a first protruded support positioned on the first surface and a second protruded support positioned on the second surface.

A lift assist and transfer assembly for lifting and moving a component through a travel distance is described. The assembly includes an overhead rail mounted to a ceiling of a work environment. The rail has a first end and a second end, corresponding to a loading area and a work area defining the travel distance. A carriage is slidably attached to the rail for supporting the component and a pneumatic cylinder element at the second end of the rail is attached an overhead fixture of the ceiling. The pneumatic cylinder element is biased into a retracted position and extends to an extended position upon actuation to move the second end of the rail downward. The carriage slides along the rail from the first end to the second end upon actuation of the cylinder to displace the second end of the rail such that the rail has a downward slope.

The present disclosure provides an aircraft security door as well as methods, systems and apparatus for handling an aircraft security door. In one implementation, a method for installing an aircraft security door onto an aircraft is disclosed. The method includes transferring the aircraft security door to an aircraft service stair, supporting the aircraft security door by a bridge crane coupled to the aircraft service stair, positioning the aircraft service stair in proximity to a fuselage of the aircraft adjacent to an opening in the fuselage, positioning the aircraft security door relative to the opening using the bridge crane, and securing the aircraft security door to the opening.

A workstation having a cantilevered crane system that includes one or more cantilevered header assemblies, with each cantilevered header assembly including an upright column and a horizontally oriented header, with the header extending from the column with a free end distal from the column. The headers support a pair of runway rails, with at least one bridge rail movably mounted to the runway rails and supporting a moveable hoist. The cantilevered crane system defines a workstation area bounded by the columns and headers, with the workstation area including an open side adjacent the free ends of the headers.