A stiffener for, and a method of, stiffening a structural member of a window are disclosed. The structural member has first and second ends thermally separated from each other. The stiffener comprises a first stiffener end configured to engage with the first end and spaced apart from the second end, and a second stiffener end configured to engage with the second end and spaced apart from the first end. An insulating stiffener coupler couples the first stiffener end to the second stiffener end to hinder thermal bridging of the first stiffener end and the second stiffener end. The method includes engaging frictionally the first extrusion with a first stiffener structure, engaging frictionally the second extrusion with a second stiffener structure, and coupling the first stiffener structure and the second stiffener structure to each other using an insulating stiffener.

An insulated fenestration system includes a frame comprising a first bracket, the first bracket defining a sealing slot; a pane assembly assembled with the frame, the pane assembly comprising a first pane; a bracket gap defined between the first bracket and the first pane; and a first seal engaging the sealing slot, the first seal extending across the bracket gap and abutting the first pane.

A composite structure has a pair of parallel aluminum extrusions bridged by a polymer cap and defining a U-shape hollow. The hollow is filled with an expandable foam that adheres to and mechanically interdigitates with the extrusions, which have channels for receiving insertion legs of the extrusions and have extensions, which the foam encapsulates. End caps may be used to further delimit the hollow. The caps and the foam have a thermal conductivity less than that of the extrusions, providing a thermal break. An upper cap may be used and may incorporate features to compensate for the foam expansion. Excess foam may be trimmed. A forked tool may be used to hold the extrusions during joining.

An aseismic assembly and a modular building are provided in the present disclosure. The aseismic assembly is provided between a main frame and a displaceable frame spaced apart from the main frame. The aseismic assembly includes a fixed member and a movable member. The fixed member is disposed on a lower surface of the top portion of the main frame. The movable member is used to interconnect the fixed member and the displaceable frame, wherein the bottom portion of the movable member is inserted into the top portion of a post of the displaceable frame. The movable member is movable relative to the displaceable frame along a height direction of the main frame. The top portion of the movable member is connected to the fixed member. The movable member is movable relative to the fixed member along a horizontal direction.

A splicing pipe for installing a door or window includes a first frame profile, a second frame profile, a heat insulation strip and at least two fasteners. A first clamping groove is formed on each of two sides of the first frame profile, and a second clamping groove is formed on each of two sides of the second frame profile. The first clamping groove and the second clamping groove are both used to connect to the door or window having glass. At least one of the first frame profile and the second frame profile on the same side is provided with an installation groove, and the fastener is inserted into the installation groove. The splicing pipe provided has the advantages of simple splicing operation and easy implementation, which can not only improve the splicing speed, but also guarantee the performance of the doors or windows after being spliced.

A sash (2) for a sliding window (1) or a sliding door includes at least two aluminium members (4, 5) connected by one or more insulating strips (7, 8). The two aluminium members (4, 5) and one of the insulating strips (7) at least partially confine a cavity (9) having a first side (10) in a direction (y) perpendicular to a plane (x-z) in which the sash (2) extends and a second side (11) opposite to the first side (10). A low emissivity surface (6a) is disposed along the first side (10) or the second side (11) and has an emissivity of less than or equal to 0.3.

An insulating strip (3) connects profiles (2) of a composite profile (1) for doors, windows or faade elements. At least one of the profiles has a roll-in groove (6) and is composed of a first metal material. The insulating strip (3) includes a strip body (4) composed of an insulating material and extending in a longitudinal direction (z). A roll-in head (5) is formed at a longitudinal edge of the strip body (4). The roll-in head (5) has a cross-sectional shape in a plane (x-y) perpendicular to the longitudinal direction (z) suitable for insertion into the roll-in groove (6). A metal sheet (13) having surface variations (17; 18) covers at least a portion of a surface (10, 11, 12) of the roll-in head (5). At least a portion of the sheet (13) is composed of a second metal material having a tensile strength of 300 N/mm.sup.2 or more.

A composite structure has a pair of parallel aluminum extrusions bridged by a polymer cap and defining a U-shape hollow. The hollow is filled with an expandable foam that adheres to and mechanically interdigitates with the extrusions, which have channels for receiving insertion legs of the extrusions and have extensions, which the foam encapsulates. End caps may be used to further delimit the hollow. The caps and the foam have a thermal conductivity less than that of the extrusions, providing a thermal break. An upper cap may be used and may incorporate features to compensate for the foam expansion. Excess foam may be trimmed. A forked tool may be used to hold the extrusions during joining.

A window system has a window frame that surrounds a window unit. The window frame has a glazing leg with an outer wall and an inner wall. The inner wall forms a J-shaped stem, which forms a J-shaped channel between the inner wall and the outer wall. A first gasket engages with the outer wall, and is maintained in compression between the outer wall and the window unit. Likewise, a second gasket engages with the inner wall, and is maintained in compression between the inner wall and the window unit.

A folding door structure is provided. The folding door structure includes an upright column, upper sliding bracket and a lower sliding bracket. The upright column is hinged to the door leaves. The folding door structure further includes a first lock component. The first lock component includes a first latch mounted inside the upright column, and both ends of which are extended out from the top and bottom of the upright column to insert into the upper slide and/or the lower slide. By providing a first lock component and an upright column, a first latch can lock the position of the upright column relative to a door frame in a direction of wind pressure. Accordingly, the stress environment of the upper sliding bracket and the lower sliding bracket is improved, and the reliability and the resistance to high wind pressure of the connection mounting structure between adjacent door leaves are improved.