CN213115177U - Assembled low energy consumption building structure based on thin-walled metal framework light precast slab of cold bending - Google Patents
Assembled low energy consumption building structure based on thin-walled metal framework light precast slab of cold bending Download PDFInfo
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- CN213115177U CN213115177U CN202021777742.2U CN202021777742U CN213115177U CN 213115177 U CN213115177 U CN 213115177U CN 202021777742 U CN202021777742 U CN 202021777742U CN 213115177 U CN213115177 U CN 213115177U
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Abstract
The utility model relates to an assembled low energy consumption building structure based on a cold-bending thin-wall metal framework light precast slab, which adopts a steel framework, the cold-bending thin-wall metal framework light precast slab is fixedly arranged on the steel framework to be used as a wallboard, a floor slab and a roof slab, the large sides of the cold-bending thin-wall metal framework light precast slab used as an outer wall wallboard are respectively attached with and provided with heat preservation decorative boards, the cold-bending thin-wall metal framework light precast slab is a light concrete slab taking a plurality of strip-shaped cold-bending thin-wall metal section bars as a built-in framework, each metal section bar has at least one side plane exposed to be used as a part, a part of metal profiles are arranged along the four sides of the large surfaces on the two sides of the prefabricated plates to form square metal frames, the adjacent two prefabricated plates and the steel frame are connected through connecting pieces and tapping screws, and the mounting parts of the tapping screws are positioned on the square metal frames of the corresponding prefabricated plates. The utility model discloses assembly operation is simple swift more.
Description
Technical Field
The utility model relates to an assembly type structure, especially, use one kind to use the lightweight concrete prefabricated plate of cold-formed thin wall metal section as built-in skeleton to act as assembly type structure of wallboard, floor and roof boarding major structure.
Background
The steel frame assembly type building is favored by more and more people due to the advantages of short construction period, low cost, small investment, energy conservation, environmental protection and the like, but still has the defects, for example, the connecting piece structure is complex when the prefabricated slab is installed, so that the assembly efficiency is low, or the prefabricated slab is simply paved without effective fixation when being installed as a floor slab, and the like.
Disclosure of Invention
The utility model aims at providing an assembled low energy consumption building structure based on thin wall metal framework light prefabricated plate of clod wash, assembly operation is simple swift more.
The utility model discloses the main technical scheme who adopts is:
an assembled low-energy-consumption building structure based on a cold-bending thin-wall metal framework light prefabricated slab adopts a steel frame structure, the cold-bending thin-wall metal framework light prefabricated slab is fixedly installed on a steel frame to serve as a wallboard, heat-insulation decorative plates are respectively attached to the inner large surface and the outer large surface of the cold-bending thin-wall metal framework light prefabricated slab serving as an outer wall wallboard, the heat-insulation decorative plates simultaneously wrap the surface of the steel frame in the same plane, the cold-bending thin-wall metal framework light prefabricated slab is a light concrete slab taking a plurality of strip-shaped cold-bending thin-wall metal profiles as a built-in framework, each metal profile has at least one side plane serving as part of the outer surface of the cold-bending thin-wall metal framework light prefabricated slab, one part of the metal profiles is arranged along the four edges of the two large surfaces of the cold-bending thin-wall metal framework light prefabricated slab to form, The prefabricated panels are transversely arranged at intervals, one or more than one cold-bending thin-wall metal framework light prefabricated panel which is arranged left and right is arranged in each wallboard installation frame opening formed by the steel frame, and the longitudinal length of each cold-bending thin-wall metal framework light prefabricated panel is equal to the height of the corresponding wallboard installation frame opening.
Any suitable form of fastening may be used between the parts to be fixedly connected. For example, the cold-formed thin-wall metal framework lightweight precast slabs and the steel frame are connected through connecting pieces and tapping screws between two adjacent cold-formed thin-wall metal framework lightweight precast slabs, and the mounting parts of the tapping screws are positioned on the square metal frame of the corresponding cold-formed thin-wall metal framework lightweight precast slabs.
The upper edge and the lower edge of the heat-insulation decorative plate which are positioned on the inner large surface can be embedded in a plurality of limiting grooves which are arranged at left and right intervals, the limiting grooves are fixedly connected to horizontal steel frames on the upper portion and the lower portion of a single-layer wall body, the upper portion of a first-layer wall body is fixedly connected to the horizontal steel frames, and the lower portion of the first-layer wall body is fixedly connected to the horizontal steel frames or embedded on a concrete foundation.
The cold-formed thin-wall metal framework light prefabricated plates are horizontally and fixedly installed on horizontal steel frames between layers and on a roof to serve as floor plates and roof plates, the cold-formed thin-wall metal framework light prefabricated plates are laid on purlines in installation frame openings of the floor plates or the roof plates, the cold-formed thin-wall metal framework light prefabricated plates are arranged between two adjacent cold-formed thin-wall metal framework light prefabricated plates, the cold-formed thin-wall metal framework light prefabricated plates are connected with the horizontal steel frames at the edges of the frame openings through connecting pieces and tapping screws, installation positions of the tapping screws are located on square-shaped metal frames of the corresponding cold-formed thin-wall metal framework light prefabricated plates, or the purlines are made of Z-shaped or I-shaped steel, and the cold-formed thin-wall metal framework light prefabricated plates are fixed.
When the cold-formed thin-wall metal framework light precast slab is used as a floor slab or a roof slab, the longitudinal direction of the precast slab is vertical to the extending direction of the purlines, and the precast slab is preferably laid at intervals of a long length and a short length in the transverse direction.
The cross section of the metal section adopted in the same cold-formed thin-wall metal framework light prefabricated plate has one or more of C shape, H shape, L shape, T shape, Z shape, Pi shape and U shape.
And the two longitudinal end faces of the cold-formed thin-wall metal framework light prefabricated slab are both planes.
Any transverse end face of the cold-formed thin-wall metal framework light precast slab can adopt any one of the following structural forms: structural form 1: plane, structural style 2: the middle convex part is close to the surfaces of the large concave parts at the two sides; structural form 3: the middle concave part is close to the surfaces of the large surface convex parts at the two sides; structural form 4: the large surface near one side is convex, the large surface near the other side is concave, the width of the convex-concave part is half of the width of the convex-concave part in the plate thickness direction, the transverse distance of the convex-concave surface is equal to half of the plate thickness, and the structural patterns of two transverse end surfaces are the same or different.
The connection between the cold-bending thin-wall metal framework light prefabricated plates can adopt a linear or L-shaped connecting piece, the connection between the cold-bending thin-wall metal framework light prefabricated plates and a steel frame preferably adopts a bilateral straight-groove-shaped connecting piece, the main body of the steel frame adopts a square steel pipe, the bilateral straight-groove-shaped connecting piece is fixedly arranged on the side face, connected with the transverse end face of the cold-bending thin-wall metal framework light prefabricated plates, of the square steel pipe, the transverse end face, connected with the steel frame, of the cold-bending thin-wall metal framework light prefabricated plates adopts a structural form 2, and an external convex part in the middle of the transverse end face is in plug-in fit with the.
The utility model has the advantages that:
the cold-formed thin-wall metal framework light prefabricated plate is simple in structure and easy to manufacture, can be used as a wallboard, a floor slab and a roof slab, and can be assembled by adopting the same connecting scheme even if used for different parts, so that the assembly operation is simplified, and the management is convenient.
The cold-formed thin-wall metal framework light prefabricated slab can be internally provided with a pipeline wiring channel or a water pipe, an air pipe, a threading pipe, a junction box and the like, so that the later wiring work is simplified and standardized.
The cold-formed thin-wall metal framework light prefabricated plates can be connected by adopting a straight-line-shaped or L-shaped connecting piece to match with a self-tapping screw, the cold-formed thin-wall metal framework light prefabricated plates can be connected with transversely adjacent steel frames by means of bilateral straight-groove-shaped connecting pieces and self-tapping screws in a unified mode, the connecting pieces are simple in structure, and connecting operation is convenient and fast. Moreover, the connecting piece can be used for installing vertical walls and floor slabs and roof slabs, wherein the double-side straight-groove-shaped connecting piece is suitable for steel columns and steel beams, can be self-positioned before connection, and is high in universality.
Drawings
FIG. 1 is a schematic view of a partial outer wall splicing structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the cold-formed thin-walled metal skeleton lightweight precast slab;
FIG. 3 is a schematic cross-sectional view of a first embodiment of the lightweight precast slab with a cold-formed thin-walled metal framework;
FIG. 4 is a schematic cross-sectional view of a second embodiment of the lightweight precast slab with a cold-formed thin-walled metal framework;
FIG. 5 is a schematic cross-sectional view of a third embodiment of the lightweight precast slab with a cold-formed thin-walled metal framework;
FIG. 6 is a schematic diagram of a splicing structure of the cold-formed thin-wall metal framework lightweight precast slabs 2a and 2b in the same plane;
FIG. 7 is a schematic view of a vertical splicing structure of the cold-formed thin-wall metal framework lightweight precast slabs 2a and 2 b;
FIG. 8 is a schematic view of a connecting structure of the cold-formed thin-walled metal framework lightweight precast slabs 2a and 2b and the same steel framework when they are installed in the same plane;
FIG. 9 is a schematic view of a connecting structure of the cold-formed thin-walled metal framework lightweight precast slabs 2a and 2b and the same steel framework when they are installed in the same plane;
FIG. 10 is a schematic view of the installation of the retaining groove;
FIG. 11 is a schematic view of the connection between the cold-formed thin-walled metal framework lightweight precast slab and the thermal insulation decorative slab.
Detailed Description
As shown in figures 1-11, the utility model discloses an assembled low energy consumption building structure based on thin wall metal framework light prefabricated plate of clod wash adopts steel frame construction, and fixed mounting thin wall metal framework light prefabricated plate 2 is as the wallboard on the steel frame 1. The cold-formed thin-wall metal framework light precast slab serving as the outer wall wallboard is mainly used for filling under a beam, and the large surfaces of the inner side and the outer side of the precast slab can be respectively attached with a heat-insulation decorative plate 4. The steel frame comprises steel beams, steel columns, purlins and other steel components which can be used for forming mounting frame openings of walls, floors, roofs, stairs, doors and windows and the like. The heat-insulating decorative plate can be fixed on the cold-formed thin-wall metal framework lightweight prefabricated plate by adhesive or threaded connectors (such as self-tapping screws 9). The heat preservation decorative board wraps the steel frame surface in the coplanar simultaneously, and the vertical steel frame surface on this layer and the girder steel surface of last layer are wrapped simultaneously to the heat preservation decorative board of every layer usually. The heat-insulating decorative plate is preferably a waterproof heat-insulating decorative plate.
As shown in fig. 2-5, the cold-formed thin-walled metal skeleton lightweight precast slab is a lightweight concrete slab which is precast in a factory and takes a plurality of strip-shaped cold-formed thin-walled metal profiles 21 as a built-in skeleton. Each metal section has at least one side plane exposed to serve as part of the outer surface of the cold-formed thin-wall metal framework light precast slab. One part of the metal section is arranged along the four edges of the large surfaces at the two sides of the cold-formed thin-wall metal framework light prefabricated slab to form a square metal frame, and the other part of the metal section is longitudinally extended on the large surfaces at the two sides and transversely arranged at intervals. The longitudinal direction and the transverse direction are specific to the cold-formed thin-wall metal framework light precast slab, and the longitudinal direction is the main bearing direction. When the prefabricated plate is used as a wallboard, the longitudinal direction of the cold-formed thin-wall metal framework light prefabricated plate is the same as the vertical direction.
One or more cold-bending thin-wall metal framework light prefabricated plates which are arranged left and right are arranged in each wallboard mounting frame opening formed in the vertical wall by the steel frame, and the longitudinal length of each cold-bending thin-wall metal framework light prefabricated plate is equal to the height of the corresponding wallboard mounting frame opening. As shown in the figures 6-11, the cold-formed thin-wall metal framework lightweight precast slabs 2a and 2b and the cold-formed thin-wall metal framework lightweight precast slabs 2a and 2b can be connected with the steel frame through connecting pieces and tapping screws 6, and the mounting parts of the tapping screws are positioned on the square metal frame of the corresponding cold-formed thin-wall metal framework lightweight precast slabs.
The upper edge and the lower edge of the heat-insulation decorative plate which are positioned on the inner large surface are preferably embedded in a plurality of steel limiting grooves 5 which are arranged at left and right intervals, the limiting grooves are fixedly connected to horizontal steel frames on the upper portion and the lower portion of a single-layer wall body, and the notches face the heat-insulation decorative plate. For the first-layer wall body, the limiting groove at the upper part is fixedly connected to the horizontal steel frame, and the limiting groove at the lower part is fixedly connected to the horizontal steel frame or embedded in a concrete foundation. The limiting grooves can be installed on the steel frame by welding or connected through threaded connectors. The limiting groove can be a single-side groove structure (see fig. 10 and 11) realized by a right-angle plate, and can also be a double-side groove structure, the inner side groove wall is attached to the inner side large surface of the heat-insulation decorative plate and used for limiting the heat-insulation decorative plate, and meanwhile, the outer side groove wall or the outer edge of the groove bottom plate can also play a certain limiting role in the cold-bending thin-wall metal framework light prefabricated plate.
The cold-bending thin-wall metal framework light precast slab can be horizontally and fixedly installed between floors and on a horizontal steel frame (generally composed of steel beams and purlines) of a roof to serve as a floor slab and a roof slab. And in the mounting frame opening of each floor slab or roof slab, the cold-formed thin-wall metal framework light precast slab is laid on the purline. As shown in fig. 6, 8, 10 and 11, the cold-formed thin-walled metal framework lightweight precast slabs 2a and 2b and the horizontal steel frame (mainly referred to as steel beam) at the edge of the frame opening can be connected through connecting pieces and tapping screws 6, and the mounting positions of the tapping screws are positioned on the square-shaped metal frames of the corresponding cold-formed thin-walled metal framework lightweight precast slabs. Or the cold-bending thin-wall metal framework light prefabricated plate can also adopt another connection mode, namely the purline can be made of Z-shaped or I-shaped steel, the cold-bending thin-wall metal framework light prefabricated plate is fixed on the purline through an L-shaped foundation bolt, the bottom of the L-shaped foundation bolt hooks the top plate of the purline, and the upper part of the L-shaped foundation bolt penetrates through the cold-bending thin-wall metal framework light prefabricated plate and is screwed by means of a nut.
When the prefabricated slab is used as a floor slab or a roof slab, the longitudinal direction of the cold-formed thin-wall metal framework light prefabricated slab is vertical to the extending direction of the purlines.
In an installation frame opening of a floor slab or a roof slab, the cold-formed thin-wall metal framework light precast slabs are laid at intervals of a long length and a short length in the transverse direction. The long and short refer to the length of the cold-bending thin-wall metal framework lightweight precast slab, and the length direction of the cold-bending thin-wall metal framework lightweight precast slab is also the longitudinal direction of the cold-bending thin-wall metal framework lightweight precast slab. The length is staggered, so that the floor slab or the roof slab is positioned and connected more tightly and firmly in the transverse direction of the cold-formed thin-wall metal framework light precast slab.
And a heat-insulating and waterproof material layer is laid on the top surface of the cold-formed thin-wall metal framework light precast slab serving as the roof slab.
Regarding the cold-formed thin-wall metal framework lightweight precast slab, the metal section can be made of steel or aluminum alloy material.
The cross section of the metal section adopted in the same cold-formed thin-wall metal framework light prefabricated plate has one or more of C shape, H shape, L shape, T shape, Z shape, Pi shape and U shape. In the embodiment shown in fig. 5, the transverse left end of the cold-formed thin-wall metal framework lightweight precast slab is made of a metal section with a Z-shaped section, and the rest parts are made of metal sections with U-shaped sections. The U-shape here is identical or similar to the cross-sectional shape of a channel, the groove bottom and the groove wall being at right angles.
The two longitudinal end faces of the cold-formed thin-wall metal framework light precast slab are planes, and the two transverse end faces can have various optional structural types, including: 1. a plane (see fig. 3), 2, the middle convex is close to the surface of the large concave on the two sides (see the left end surface of fig. 5), 3, the middle concave is close to the surface of the large convex on the two sides, 4, the large convex on one side is close to the surface of the large concave on the other side, the widths of the convex-concave parts respectively account for half in the plate thickness direction, and the transverse distance of the convex-concave surfaces is equal to half of the plate thickness (see the right end surface of fig. 4). The two transverse end faces can be of the same or different structural types. The two transverse end faces of the structural types 2 and 3 can be matched with each other, and the method can be used for splicing two cold-formed thin-wall metal framework light prefabricated plates in the same plane. The structural form 4 can be divided into two cases, namely a surface which is convex towards the outer large surface and concave towards the inner large surface and a surface which is convex towards the inner large surface and concave towards the outer large surface, and the two surfaces can be used for splicing two cold-formed thin-wall metal framework lightweight precast slabs in the same plane (see figure 6) and can also be used for vertically splicing two cold-formed thin-wall metal framework lightweight precast slabs (see figure 7).
In addition to the metal profiles at the two transverse ends, the other metal profiles are preferably arranged in pairs and in planar symmetry, i.e. the exposed surfaces of a pair of metal profiles are located on the two large sides, respectively.
The cold-formed thin-wall metal framework light prefabricated slab can be internally provided with a pipeline wiring channel for pipe threading, or one or more of a water pipe, an air pipe and a threading pipe can be directly internally provided, and a socket and the like can also be internally provided.
No matter the prefabricated panels are used as wall panels or floor slabs and roof slabs, the connection between the cold-formed thin-wall metal framework light prefabricated panels can adopt a straight-line-shaped connecting piece 7 or an L-shaped connecting piece 8, and the two cold-formed thin-wall metal framework light prefabricated panels are respectively connected and fixed with the corresponding connecting pieces through self-tapping screws 6. The straight-line-shaped connecting piece is used for the condition that two cold-formed thin-wall metal framework light prefabricated plates are still in the same plane after being spliced (see figure 6), and the L-shaped connecting piece is used for the condition that two cold-formed thin-wall metal framework light prefabricated plates form a right-angle corner after being spliced (see figure 7).
And similarly, the connection between the cold-formed thin-wall metal framework light precast slab and the steel frame preferably adopts a bilateral straight groove-shaped connecting piece 1-2. Correspondingly, the main body of the steel frame is preferably a square steel tube 1-1, and the bilateral straight-groove-shaped connecting piece 1-2 can be fixedly arranged on different side surfaces of the square steel tube according to different positions, namely on one side surface connected with the transverse end surface of the cold-bending thin-wall metal framework light precast slab. When the bilateral straight-groove-shaped connecting piece 1-2 is adopted, the transverse end face of the cold-formed thin-wall metal framework light prefabricated plate connected with the steel frame preferably adopts a structural type 2, and corners at the edge are right angles. The middle convex part on the transverse end surface is in inserted fit with the bilateral straight-groove-shaped connecting piece, and then the edge is fixed through the self-tapping screw 6. The bilateral straight-groove-shaped connecting piece and the square steel pipe can be connected by welding or a threaded connecting piece.
When the transverse end face of the cold-formed thin-wall metal framework lightweight precast slab is not in contact with the steel frame, the straight connecting piece 7 and the self-tapping screw can be used for connecting the longitudinal end part of the cold-formed thin-wall metal framework lightweight precast slab with the steel frame.
The upper, lower, inner and outer are referred to herein as the upper, lower, inner and outer when viewed from the outdoor side toward the indoor side.
Claims (10)
1. The assembly type low-energy-consumption building structure based on the cold-bending thin-wall metal framework light prefabricated slab is characterized in that a steel frame structure is adopted, the cold-bending thin-wall metal framework light prefabricated slab is fixedly installed on the steel frame to serve as a wallboard, the large inner side and the large outer side of the cold-bending thin-wall metal framework light prefabricated slab serving as an outer wall wallboard are respectively attached with a heat-insulation decorative board, the heat-insulation decorative board wraps the surface of the steel frame in the same plane, the cold-bending thin-wall metal framework light prefabricated slab is a light concrete slab taking a plurality of strip-shaped cold-bending thin-wall metal profiles as a built-in framework, each metal profile is provided with at least one side plane exposed to serve as a part of outer surface of the cold-bending thin-wall metal framework light prefabricated slab, one part of the metal profiles is arranged along the four edges of the large, the other part of the prefabricated panels extends longitudinally on the large surfaces of the two sides and is transversely arranged at intervals, one or more cold-bending thin-wall metal framework light prefabricated panels which are arranged left and right are arranged in each wallboard mounting frame opening formed by the steel frame, and the longitudinal length of each cold-bending thin-wall metal framework light prefabricated panel is equal to the height of the corresponding wallboard mounting frame opening.
2. The fabricated low-energy-consumption building structure based on the cold-formed thin-wall metal framework light precast slab as claimed in claim 1, wherein the upper and lower edges of the heat-insulating decorative slab on the inner large surface are embedded in a plurality of limiting grooves which are arranged at intervals left and right, the limiting grooves are fixedly connected to horizontal steel frames above and below a single-layer wall, for a first-layer wall, the upper limiting groove is fixedly connected to the horizontal steel frame, and the lower limiting groove is fixedly connected to the horizontal steel frame or embedded in a concrete foundation.
3. The fabricated low-energy-consumption building structure based on the lightweight precast slab of the cold-formed thin-walled metal framework of claim 2, it is characterized in that the cold-formed thin-wall metal framework light precast slab is horizontally and fixedly arranged between layers and on a horizontal steel frame of a roof as a floor slab and a roof slab, in the installation frame opening of each floor slab or roof slab, the cold-bending thin-wall metal framework light prefabricated plates are laid on the purlines, the cold-bending thin-wall metal framework light prefabricated plates are arranged between two adjacent cold-bending thin-wall metal framework light prefabricated plates and connected with the horizontal steel frame at the edge of the frame opening through connecting pieces and tapping screws, the mounting parts of the tapping screws are positioned on the square metal frame of the corresponding cold-bending thin-wall metal framework light prefabricated plates, or the purlines are made of Z-shaped or I-shaped steel, and the cold-formed thin-wall metal framework light precast slab is fixed on the purlines through L-shaped foundation bolts.
4. An assembled low-energy-consumption building structure based on cold-formed thin-wall metal framework lightweight precast slabs as claimed in claim 3, wherein the cold-formed thin-wall metal framework lightweight precast slabs are longitudinally perpendicular to the extending direction of purlins and are laid at long and short intervals in the transverse direction when used as floor slabs or roof slabs.
5. An assembled low-energy-consumption building structure based on the cold-formed thin-wall metal framework lightweight precast slab as claimed in claim 4, characterized in that a heat-insulating and waterproof material layer is laid on the top surface of the cold-formed thin-wall metal framework lightweight precast slab as a roof panel.
6. The fabricated low-energy-consumption building structure based on the lightweight precast slabs of the cold-formed thin-wall metal framework as claimed in claim 1, 2, 3, 4 or 5, wherein the metal profiles are made of steel or aluminum alloy materials.
7. The fabricated low-energy-consumption building structure based on the lightweight precast slab with the cold-formed thin-walled metal framework as claimed in claim 6, wherein the cross-sectional shape of the metal section adopted in the same lightweight precast slab with the cold-formed thin-walled metal framework is one or more of C-shaped, H-shaped, L-shaped, T-shaped, Z-shaped, pi-shaped and U-shaped.
8. The fabricated low-energy-consumption building structure based on the cold-formed thin-wall metal framework lightweight precast slab as claimed in claim 7, wherein the longitudinal two end surfaces of the cold-formed thin-wall metal framework lightweight precast slab are both planar, and any one of the transverse end surfaces adopts any one of the following structural types: structural form 1: plane, structural style 2: the middle convex part is close to the surfaces of the large concave parts at the two sides; structural form 3: the middle concave part is close to the surfaces of the large surface convex parts at the two sides; structural form 4: the large surface near one side is convex, the large surface near the other side is concave, the width of the convex-concave part is half of the width of the convex-concave part in the plate thickness direction, the transverse distance of the convex-concave surface is equal to half of the plate thickness, and the structural patterns of two transverse end surfaces are the same or different.
9. The fabricated low-energy-consumption building structure based on the cold-formed thin-wall metal framework lightweight precast slab as claimed in claim 8, wherein the cold-formed thin-wall metal framework lightweight precast slab is internally provided with a pipeline wiring channel or one or more of a water pipe, an air pipe and a threading pipe.
10. The fabricated low-energy-consumption building structure based on the cold-formed thin-wall metal framework lightweight precast slabs as claimed in claim 9, wherein the cold-formed thin-wall metal framework lightweight precast slabs are connected by in-line or L-shaped connecting pieces, the cold-formed thin-wall metal framework lightweight precast slabs and the steel frame are connected by bilateral straight-groove-shaped connecting pieces, the main body of the steel frame is made of square steel tubes, the bilateral straight-groove-shaped connecting pieces are fixedly mounted on the side surfaces of the square steel tubes connected with the transverse end surfaces of the cold-formed thin-wall metal framework lightweight precast slabs, the transverse end surfaces of the cold-formed thin-wall metal framework lightweight precast slabs and the steel frame are in structural type 2, and the middle convex parts on the transverse end surfaces are in inserted fit with the bilateral straight-groove-shaped.
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