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683results about "Sky-lights/domes" patented technology

Construction method of variable-curvature super-depth fusiform skylight in steel structure

The invention relates to the technical field of building construction, in particular to a construction method of a variable-curvature super-depth fusiform skylight in a steel structure, and solves the construction problem of a complex space curved surface through digital design, factory prefabrication, intelligent installation and real-time monitoring and compensation. Through a digital twin-driven construction technology system, the worldwide problems of the variable-curvature ultra-deep steel structure in the aspects of form precision, mechanical stability and construction efficiency are solved, a technical normal form capable of being popularized is provided for the ultra-deep and variable-curvature steel structure, and building form innovation is promoted. And meanwhile, the dependence on manpower is reduced through modular and mechanical operation, the construction period is shortened, the safety is improved, and the cost is reduced by combining prefabricated unit components with dynamic monitoring.
Owner:CHINA UNITED NORTHWEST INST FOR ENG DESIGN & RES

Building daylighting heat-insulation waterproof window well

The utility model relates to a lighting, heat-insulating and waterproof window well of a building and belongs to the technical field of window wells. Comprising a basement wall and a lighting assembly, window wells are arranged on the basement wall, the lighting assembly comprises lighting windows and suspended ceilings, the lighting windows and the suspended ceilings are located at the tops and the bottoms of the window wells respectively, the window wells comprise the upper window wells and the lower window wells, and the lower window wells are in a horn shape; a waterproof heat preservation assembly is arranged between the window well and the basement wall, a drainage pipe penetrating through the waterproof heat preservation assembly is arranged in the basement wall, the waterproof heat preservation assembly comprises a waterproof roll layer, a cement mortar smearing layer and a graphite polystyrene board, and the cement mortar smearing layer and the graphite polystyrene board conduct heat preservation on the window well. According to the building daylighting heat-preservation waterproof window well, the daylighting efficiency and uniformity are improved through the design of the outwards-convex-pyramid-shaped daylighting window and the horn-shaped lower window well, the waterproof heat-preservation assembly is combined with the graphite polystyrene board, heat transfer is effectively prevented, the heat-preservation performance is enhanced, and meanwhile the waterproof effect is improved through the waterproof roll layer and the cement mortar smearing layer.
Owner:WALTON DESIGN CONSULTING ENG CO LTD

Frame solution for laminated VIG unit

The present disclosure relates to a vacuum insulated glass (VIG) unit frame assembly (10), wherein said vacuum insulated glass unit frame assembly (1) comprises: a frame (20) comprising elongated frame profile arrangements (20a-20d, 70) which frames a vacuum insulated glass unit (1) in a frame opening (21), wherein said vacuum insulated glass unit (1) comprises at least two glass sheets (2a, 2b) separated by a gap (11) between said glass sheets (2a, 2b), wherein a plurality of support structures (12) are distributed in said gap (11), and wherein said gap (11) is sealed by means of a sealing system (1b, 1c) which seals an evacuation hole (1a) arranged in a first (2a) of said glass sheets and extending to the gap (11). A lamination glass sheet (14) is attached to an outer major surface (4a) of said first glass sheet (2a) by means of a lamination layer (16), and wherein said sealing system (1c) extends into a hole (14a) in the lamination glass sheet (14), and the edge (8a-8c) of the vacuum insulated glass unit (1) proximate the hole (14a) in the lamination glass sheet (14), said sealing system (1c) and said hole in the lamination glass sheet (14) into which the sealing system (1c) extends are covered by the frame (20). The disclosure additionally relates to a retrofitting frame system (100) and a laminated vacuum insulated glass unit (1).
Owner:VKR HOLDING AS

Debris ejector for roof gutter systems

An apparatus for attachment to a gutter system that includes a mounting assembly and a light fixture. The mounting assembly including a light mount and capable of being fixedly attached to a gutter. The light fixture including at least one section for receiving the light mount.
Owner:UNCLUTTER GUTTER LLC

Packed roof window product, a method for packing a packed roof window product, and a method of unpacking a packed roof window product

A packed roof window product containing a plurality of window product related components packed in a box, wherein sub-packaging containing one or more components is provided with an attachment flap, and is retained in relation to another component by the attachment flap being arranged in an internal space of the other component, as a well methods for packing and unpacking such a packed roof window product.
Owner:VKR HOLDING AS

Roof window and roof window assembly method in a roof structure

The subject-matter of the invention comprises a roof window and an assembly method for that window, constructed out of a jamb and a sash with a glass unit, and the roof window sash is seated in the jamb circumference using a pair of hinges, and the jamb is constructed out of four stiles attached to each other to form a rectangular frame, that is upper stile (11), lower stile (13) and two side stiles (12), wherein upper stile (11) in its assembled state in a roof is higher than all the other stiles in the roof, and jamb stiles feature window assembly in roof depth markers (4), characterized in that, in an assembled state in a roof, roof window slope angle α is within the 1-30° range and angle α is different than roof pitch angle β.
Owner:FAKRO PP SPOLKA Z O O

A roof window, a kit with a covering assembly, and a method for mounting a roof window

A roof window (1) comprising a frame (2), a sash (3) carrying a pane (4), where the frame (2) comprises an interface unit (8) extending in the length direction (L) of at least one frame member (21, 22, 23, 24). At least one flashing member (1011, 1012, 1013, 1014) comprises a flange (1017) inserted in a flashing reception groove (85) in the interface unit (8) in a direction parallel to the frame plane (F), said flashing reception groove (85) extending in the length direction (L) of the frame member (21, 22, 23, 24). One or more protrusions (85a) are provided in the flashing reception groove for engagement with the flange(s) (1017) and extend(s) in the length direction (L) and is / are made by co-extrusion with one or more parts (80, 86, 88) of the interface unit (8) delimiting the flashing reception groove. A method for mounting a roof window is also disclosed.
Owner:VKR HOLDING AS

Intelligent control photovoltaic power generation sunlight room

The invention discloses an intelligent control photovoltaic power generation sunlight room which comprises a sensor assembly, the sensor assembly is detachably installed on a house, a foldable photovoltaic assembly is further laid on a roof of the house, and the sensor assembly can control the photovoltaic assembly through a controller; the photovoltaic module comprises a plurality of groups of photovoltaic panels and a rotating rod, the rotating rod is rotationally connected to the roof, a driving device is further arranged on the roof, the output end of the driving device is connected with the rotating rod, the inner side edges of the two photovoltaic panels can mutually rotate and be folded through a shaft, and the outer side edges of the two photovoltaic panels can be connected with the rotating rod through moving blocks; and the rotating rod can drive the moving block to move in the rotating process, so that the two photovoltaic panels are closed and folded. The photovoltaic module adopts a foldable design and can be unfolded or folded as required, so that the light receiving area and angle of the photovoltaic panel are optimized. Therefore, the efficiency of photovoltaic power generation can be improved, the problem of overheating caused by direct sunlight can be reduced, and the service life of the photovoltaic module is prolonged.
Owner:ANHUI QINGYU NEW ENERGY CO LTD

A roof window with a diverter rail

A roof window (1) comprising a frame (2), a sash (3), a pane element (4), and a covering assembly (10), the covering assembly (10) comprising a diverter rail (103), where the diverter rail (103) extends along a top frame member (21) in a length direction and projects from the top frame member, forming a diverter angle (A) of 45-89 degrees with respect to a plane (C) defined by an exterior surface (4e) of the pane element (4).
Owner:VKR HOLDING AS

Large-span adjustable multi-layer protection construction safety shed

The invention discloses a large-span adjustable multi-layer protection construction safety shed which is arranged between an overpass crossing a crossed road and the crossed road. The span-adjustable multi-layer protection construction safety shed comprises a plurality of stand column assemblies evenly arranged in the depth direction of a crossed road, a plurality of adjusting assemblies arranged in one-to-one correspondence with the stand column assemblies, and a protection assembly. Each stand column assembly comprises two stand columns arranged on the two sides of the crossed road in the width direction. Each adjusting assembly comprises an adjusting rope slidably connected between the tops of the two stand columns of each stand column assembly, and the two ends of each adjusting rope are fixedly connected with the ground. The protection assembly comprises a protection net covering the sides, back to the multiple stand columns, of the multiple adjusting ropes, a protection grid covering the sides, back to the multiple adjusting ropes, of the protection net, and a light-transmitting plate covering the sides, back to the protection net, of the protection grid. And the construction safety is improved.
Owner:SOUTHERN CONSTR CO LTD OF CHINA CONSTR EIGHTH ENG DIV

Frame assembly comprising a vacuum insulated glass unit fixed to a frame by means of a structural adhesive

The present disclosure relates to a vacuum insulated glass (VIG) unit frame assembly (10), wherein said vacuum insulated glass unit frame assembly (10) comprises: a rectangular vacuum insulated glass unit (1) comprising two glass sheets (2a, 2b) separated by a gap (11) between said glass sheets (2a, 2b), wherein a plurality of support structures (12) are distributed in said gap (11) and wherein said gap (11) is sealed, and a frame (20) comprising elongated frame profile arrangements (20a-20d, 70) arranged to provide a frame opening (21) extending in a frame opening plane (P2) defined between the elongated frame profile arrangements (20a-20d, 70). A plurality of edges (8a-8d) of said rectangular vacuum insulated glass unit (1) overlaps an elongated frame profile arrangement (20a-20d, 70) of said frame (20), and an inwardly directed, major surface (4a, 4b, 15, 35a) of a glass sheet (2a, 35a,) of the vacuum insulated glass unit (1) is bonded to the overlapped elongated 15 frame profile arrangement (20a-20d, 70) by means of a structural adhesive(45a). Said overlapping edges (8a-8d) of the vacuum insulated glass unit (1) are allowed to thermally deflect (DIS4) relative to said elongated frame profiles (20a-20d, 70) in a deflection direction (D1, D2) perpendicular to said frame opening plane (P2) due to a temperature difference (ΔT=T1−T2) between the two glass sheets (2a, 2b), and wherein said allowed thermal deflection of the overlapping edges (8a-8d) is allowed to have a varying magnitude along the edge (8a-8d) between the corners (9) where the respective edge (8a-8d) terminates. The present disclosure additionally relates to a vacuum insulated glass unit.
Owner:VKR HOLDING AS

Skylight cover

PendingUS20250361726A1Sky-lights/domesSkylightFastener
A skylight cover for protecting a skylight fixed to a roof of a building via a skylight frame is provided. The skylight cover has a body including a top wall and a plurality of side walls extending downwardly from the top wall to a flange extending outwardly from at least some of the plurality of side walls for abutment with the roof. Further, a plurality of fastener location features are formed in at least some of the plurality of side walls. The plurality of fastener location features facilitate fixation of the body directly to the skylight frame without fixing the body directly to the roof.
Owner:SKYLIGHT SAVER LLC

Ambient air circulation system of pneumatic membrane structure and self-adaptive control method

The invention provides an air inflation membrane structure environment air circulation system and a self-adaptive control method thereof, and relates to the technical field of air membrane structures. The system comprises an inflatable membrane, a flexible and deformable connecting piece and an air circulation device, a first opening is formed in the inflatable membrane, the connecting piece is connected with and surrounds the first opening in a sealed mode, and the other end of the connecting piece is connected with the air circulation device through a sealed clamping structure; the air circulation device comprises a valve body assembly, a driver drives a valve plate to control opening and closing of the second opening, and the first opening, the connecting piece and the second opening jointly define an air circulation channel. According to the control method, on the basis of environment characteristics obtained by the sensor module, opening and closing of the valve body are controlled in a self-adaptive mode according to three-level priorities of fire danger, structure safety and environment adjustment. The problems that an existing system is poor in air tightness, a membrane material is prone to being torn, and self-adaptive adjustment cannot be achieved are solved, air tightness improvement, membrane material safety enhancement and efficient environment adjustment are achieved, and remarkable practical value is achieved.
Owner:SHENZHEN ZHONGDE MEMBRANE STRUCTURE CO LTD

Roof window comprising releasable components

In a roof window, a frame comprises at least one releasable component configured to allow replacement with a different set of components to change a functionality of the roof window. Specifically, one releasable component comprises a cover releasably connected to remaining components of a bottom frame member and defining a cavity relative to the remaining components of the bottom frame member.
Owner:VKR HOLDING AS

Quick mounting structure suitable for sunlight room and sunlight room

The utility model provides a quick mounting structure suitable for a sunlight room and the sunlight room. The quick mounting structure comprises a connecting rod, a connecting rod and a connecting piece, the cross beam is provided with a first connecting unit and a second connecting unit; the connecting piece is connected with the connecting rod and comprises a locking part, a pushing and abutting part and an actuating part, the pushing and abutting part is matched with the locking part, the actuating part is connected with the locking part and controls the locking part to move, and the locking part is switched between a first state and a second state under the action of the pushing and abutting part in the moving process; the first connecting unit and the second connecting unit extend towards the two sides of the cross beam, each of the first connecting unit and the second connecting unit comprises a connecting part, each connecting part comprises a first wall part and a second wall part, and a groove part allowing the locking part to be inserted therein is formed between the first wall part and the second wall part; a first stop part is formed on the first wall part, and a second stop part is formed on the second wall part.
Owner:PINGHU LEYOU SANITARY WARE CO LTD

Aluminum alloy electric sunroof

The invention discloses an aluminum alloy electric skylight, belonging to the field of aluminum alloy doors and windows. The electric skylight comprises a left sash frame, glass, a window frame, a middle sash frame, a right sash frame, a glass sealing strip, an electric lifter, a window frame profile and a hinge; the left sash frame is installed on the window frame and is located at the left end of the window frame, is buckled with the window frame and is connected through a hinge and an electric lifter, and is composed of a combination of sash frame profiles; the glass is installed in the left sash frame, the middle sash frame and the right sash frame, and is buckled and fixedly connected with the left sash frame, the middle sash frame and the right sash frame; the window frame is installed at the skylight opening and is connected to the house building structure at the skylight opening, and has the characteristics of compact structure, good sealing and beautiful appearance.
Owner:HENAN HENGMEI ALUMINUM

Mesh for skylight protection system

ActiveFR3158528B3CeilingsSky-lights/domes
The invention relates to a mesh (3) for a protective device (1) for a skylight (2); of the type of device comprising: - the mesh itself (3), having a dimension greater than the opening (20) of the skylight (2), to a sufficient extent to cover its contour (21), and - perimeter anchors (4) for fixing the mesh (3) to the opening (20) of the skylight (2); and wherein the mesh (3) comprises intermediate wires (39) and additional safety wires (30) at its longitudinal sides (38); characterized in that it comprises four additional safety wires (30) on each longitudinal side, with a diameter between 1.5 and 2.5 mm, and arranged at a first distance from each other of between 20 and 30 mm;while the intermediate wires have a diameter of between 1.5 and 2.5 millimeters and are arranged at a second distance from each other and from the fourth additional safety wire, of between 40 and 80 millimeters. (Fig. 1);
Owner:TOTAL SYST WIRE SL

Roof window comprising a frame with receiving structures

In the roof window, each frame member (22) comprises a plurality of receiving structures at an interior, exterior, inner and / or outer side. The receiving structures comprise a number of grooves (25, 26, 27, 28) to interact with auxiliary equipment in an assembled condition of the frame.
Owner:VKR HOLDING AS

Roof ceiling endurance plate curtain wall opening skylight structure

The utility model relates to a roof ceiling endurance plate curtain wall opening skylight structure which comprises a skylight bottom frame, a skylight opening sash rotationally connected to the skylight bottom frame and a roof bearing beam, and is characterized by further comprising a bottom buckling strip and a middle supporting seat, and buckling side wing parts are arranged on the two sides of the bottom buckling strip in the length direction of the bottom buckling strip respectively; a fixing concave part used for being fixed to a roof bearing beam is further formed in the middle of the bottom buckling strip in the length direction of the bottom buckling strip. Buckling grooves buckled with the buckling side wing parts are correspondingly formed in the bottom of the middle supporting base, and bearing steps for installing a skylight bottom frame are arranged on the two sides of the top of the middle supporting base respectively. The utility model has the advantages of wide application range, good ventilation and lighting performance, long service life and the like.
Owner:GUANGDONG HENGGUAN ALUMINUM TECH CO LTD

Self-cleaning scuttle structure

The present application relates to the technical field of sunroof, especially relates to a self-cleaning sunroof structure, which comprises a glass plate, the periphery of the glass plate is fixedly sleeved with an outer frame, a driving mechanism is arranged in the outer frame, a C-shaped accommodation groove is formed in the inner wall of the outer frame, and a cleaning rod is arranged in the inner part of the outer frame and connected with the driving mechanism, the cleaning rod can be stored in the outer frame when not cleaning, so that dust outside is prevented from adhering to the cleaning rod, the cleaning rod is ensured to be clean enough, the glass plate can be cleaned by the cleaning rod driven by the driving mechanism when cleaning is needed, and the cleaning effect is improved.
Owner:CHINA MCC22 GROUP CORP LTD +1

Roof-draining member and roof provided with roof-draining member

This roof-draining member (10) is provided to a roof furring (3) of an inclined roof. The roof-draining member (10) comprises: a base part (11) disposed along the roof furring (3); and a rising part (20) provided to the base lower end of the base part (11) in a state in which the roof-draining member (10) is attached to the roof furring (3). The base lower end has a first base lower end and a second base lower end. The rising part (20) has a first rising part (21) configured as a portion that rises along the first base lower end due to bending of a constituent member constituting the roof-draining member (10), and a second rising part (22) configured as a portion that rises along the second base lower end due to bending of the constituent member.
Owner:SEKISUI HOUSE KK

A thin ventilation window system for a factory building

The present application relates to a kind of thin ventilation skylight systems for factory, which is installed on the support beam arranged at the top of factory;It is characterized by including waterproof groove, rain baffle, waterproof groove compression frame, support plate, communication rod, light valve plate, buckle unit and valve plate drive module;Using a flat panel to carry out die stamping forming, it can realize modular mass production, and high production efficiency, and no pre-assembly is needed;After completing stamping forming, only bending operation is needed, the forming of product can be realized, and it can be installed directly across the waterproof groove;Buckle unit connection disassembly operation is more convenient, and installation efficiency is improved;Communication rod is connected on each support plate, and the communication rod arranged above and below is used to install rain baffle structure, and staggered arrangement of cloth baffle can guide rainwater into waterproof groove on one hand, and it is also convenient for light to pass through light valve plate for lighting;Valve plate drive module can drive light plate to open and realize ventilation.
Owner:NANTONG KELAIKE AIR TREATMENT EQUIP CO LTD

Roof window including a window frame with profile elements and method for manufacturing a roof window

In a roof window (1), each window frame member (31, 32) comprises a profile element (31a, 32a), an inner element (32c) and intermediate elements (31b, 32b), which intermediate elements form a connection between the profile element and the inner element of each window frame member in the assembled state of the window frame (3). In the assembled state of the window frame (3), the profile elements (31a, 32a) of the window frame members (31, 32) are positioned along corresponding outer edge portions of the pane (4), and the profile elements (31a, 32a) of the top window frame member (31) and the two side window frame members (32) are formed as a set of longitudinal profiles with a substantially uniform cross-section.
Owner:VKR HOLDING AS

Metal window with thermal shield

There is disclosed herein a window assembly comprising: a glazing unit including an inner pane arranged on an inner side of the glazing unit and an outer pane arranged on an outer side of the glazing unit; a frame for surrounding an opening in a wall or roof of a building for supporting the glazing unit; and a thermal shield locatable between the frame and the opening, wherein the thermal shield comprises a structural element configured to extend laterally into the opening from the frame and a sealing member to create a seal around the opening between the structural element and the inner pane of the glazing unit, wherein an inner lip of the structural element is arranged to extend laterally into the opening beyond the sealing member to define an air pocket between the inner lip and the inner pane of the glazing unit, and wherein, when the window assembly is installed in a building, the thermal shield thereby defines a thermal conduction path along the inner pane of the glazing unit, from the laterally inner edge of the air pocket to the laterally inner edge of the frame, that is the path of least thermal resistance between the opening and an exterior of the building. Further window assemblies, related thermal shields and methods of designing, manufacturing and installing the window assemblies are disclosed.
Owner:THE METAL WINDOW CO LTD INC IN THE UK

Large-inclination-angle super-large-area openable roof skylight system

ActiveCN116950323BImprove anti-leakage functionAchieve limited time openingMechanical apparatusLighting and heating apparatusFixed frameFlue gas
This invention provides a large-angle, ultra-large-area operable roof skylight system, belonging to the field of skylight construction technology. It includes fluorocarbon-coated welded steel pipes, conversion channel steel, a custom-made waterproof aluminum alloy support frame, an aluminum alloy fixing frame, an aluminum alloy operable sash, and insulated tempered laminated glass. The fluorocarbon-coated welded steel pipes and fluorocarbon-coated square steel serve as the main and secondary keels of the operable roof skylight system, respectively. The conversion channel steel connects to the main and secondary keels. The custom-made waterproof aluminum alloy support frame and aluminum alloy fixing frame are fixed to the conversion channel steel with screws. The aluminum alloy operable sash is fixed to the aluminum alloy fixing frame via hinges. The lower end of the electric window opener is hinged to the fluorocarbon-coated welded steel pipe via a connecting steel component, and the upper end is fixed to the skylight frame via a base. This invention enables a large-angle opening of the ultra-large-area skylight, achieving the effect of fully opening the ultra-large-area skylight before the flue gas fills the smoke storage chamber. Furthermore, the skylight maintains good water tightness and air tightness when closed.
Owner:THE THIRD CONSTR OF CHINA CONSTR EIGHTH ENG BUREAU

Novel skylight sash structure

The utility model relates to the technical field of skylight sashes. The novel skylight sash structure comprises a fixing frame, a window frame body is hinged to the upper surface of the fixing frame, a locking assembly is arranged in the middle of one side of the fixing frame and comprises a limiting frame, supporting rods are hinged to the two sides of the bottom face of the window frame body, and a clamping groove is formed in one side of the upper surface of the fixing frame. The fixing frame, the window frame body and the locking assembly are used in cooperation, so that the window frame body can be conveniently locked, and the operation of rapidly opening and closing the window frame body can be completed; through cooperative use of the fixing frame, the window frame body, the supporting rod, the storage groove, the clamping groove, the limiting block, the first column body, the reset spring and the second column body, the purpose of rotatably opening the window frame body can be achieved, and the purpose of adjusting the opening angle of the window frame body according to needs and fixing the window frame body is achieved.
Owner:CHENGDU YUHESHENG VENTILATION EQUIP CO LTD

Ventilation skylight

The utility model relates to a ventilating skylight, which comprises a skylight framework fixed at a ventilating opening of a color steel roof, a wind shield wrapped outside the skylight framework, and a daylighting panel laid on the skylight framework, the top of the wind shield is provided with an air opening corresponding to the daylighting panel, and two sides of the daylighting panel are respectively provided with an L-shaped spill-proof plate. The inner end of the L-shaped spill-proof plate is connected to the lower portion of a cornice of the daylighting panel and communicated with a drainage pipe located below the cornice through a penetrating hole in an inner end face plate of the L-shaped spill-proof plate, the outer end of the L-shaped spill-proof plate is turned over, vertically upwards and inwards bent, and a water blocking face which is vertically upwards and provided with the top bent inwards is formed. A plurality of transverse sliding plate assemblies arranged in the longitudinal direction are arranged at the top of the wind shield and used for blocking the upper portion of the air opening and extending to the outer side edge of the wind shield. Rainwater can be effectively prevented from entering the plant while normal ventilation is ensured, and the ventilation device is simple in structure and easy to implement.
Owner:SHANGHAI TIANHUA ARCHITECTURAL DESIGN CO LTD XIAN BRANCH

SMOKE VENT, ROOF COVERING INCORPORATING SUCH A VENT, AND ITS INSTALLATION METHOD

A fume outlet (1) comprising a thermoplastic material capable of shrinking at a temperature of approximately 80°C, characterized in that it is directly composed of at least one sheet (10) with a roofing function, made of PET-G. Figure to be published with the abbreviation: Fig. 5
Owner:GRP PROTECTION SECURITE

Assembling equipment for daylighting and smoke discharging skylight

The utility model relates to the related technical field of daylighting and smoke discharging skylight assembling, and provides daylighting and smoke discharging skylight assembling equipment which comprises a base and a pair of side seats, the side seats are fixed to the two sides of the base, riveting assemblies are arranged on the side seats, butt joint pressing and fixing assemblies are arranged on the base, and each butt joint pressing and fixing assembly comprises a plurality of stand columns. The stand columns are fixed to the surface of the base, platforms are arranged at the upper ends of the stand columns, the grooves are formed in the four opposite edges of the surface of the base, and first air cylinders are arranged on the inner side surfaces of the grooves. By means of the technical scheme, the problems that in the prior art, frames are connected one by one, then screws or rivets are driven for fixed connection, but manual operation is complex, efficiency is low, and dislocation is prone to occurring are solved.
Owner:TANGSHAN DINGXING BUILDING CONSTR ENG CO LTD