Steel bar truss floor support plate

Abstract

The utility model provides a steel bar truss floor support plate. The steel bar truss floor support plate comprises a steel bar truss, a channel steel purline, a fixed connecting piece and a bottom template, the number of the steel bar trusses is multiple, and the number of the channel steel purlins is two times that of the steel bar trusses. The channel steel purline is placed on the upper surface of the bottom template and is fixedly connected through the fixed connecting piece; and each steel bar truss is fixedly mounted on the upper surfaces of the two channel steel purlins respectively. According to the steel bar truss floor support plate provided by the embodiment of the utility model, due to the additional flexural rigidity provided by the channel steel purlins, the downwarping deformation of the floor support plate can be reduced under the working condition of pouring concrete, and the maximum applicable span of support-free construction of the floor support plate is improved.

Description

Technical Field

[0001] This utility model relates to the field of building technology, and more specifically, to a steel truss floor deck. Background Technology

[0002] Reinforced steel truss floor decking, requiring no formwork removal, is a new type of prefabricated floor slab component. It boasts advantages such as lightweight installation and ease of lifting, making it valuable in prefabricated building technologies like steel-structure modular construction and steel-concrete composite modular construction. In recent years, it has gained increasing market favor. For modular building technologies, to improve on-site construction efficiency, the interior finishing of the floor slab's underside is often completed in the factory during module production. When pouring concrete on-site, to prevent damage or contamination of the underside finishing due to temporary supports, modular building technologies place high demands on the maximum applicable span of the floor decking for unsupported construction. However, current technologies do not offer floor decking that can meet these high applicable span requirements. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this utility model embodiment is to provide a steel truss floor deck.

[0004] This utility model embodiment provides a steel truss floor deck, including: steel trusses, channel steel purlins, fixing connectors, and bottom formwork; the number of steel trusses is multiple, and the number of channel steel purlins is twice the number of steel trusses; the channel steel purlins are placed on the upper surface of the bottom formwork and fixedly connected by the fixing connectors; each steel truss is fixedly installed on the upper surface of two channel steel purlins respectively.

[0005] Optionally, holes for installing the fixing connectors are reserved on the surface of the bottom template and the channel steel purlin.

[0006] Optionally, the fixing connector is a combination of screws and nuts.

[0007] Optionally, the screw and nut assembly includes a screw and a nut, wherein the screw passes sequentially from bottom to top through pre-drilled holes in the bottom template and the channel steel purlin; and the nut is placed from top to bottom at the location of the screw.

[0008] Optionally, the channel steel purlin includes: an upper flange plate, a web plate, and a lower flange plate; the steel truss is installed on the surface of the upper flange plate, and the lower flange plate is installed on the surface of the bottom formwork.

[0009] Optionally, the steel truss is welded to the channel steel purlin.

[0010] Optionally, the bottom template is made of cement-based material; the channel steel purlin is made of galvanized steel sheet.

[0011] In the above-described solution of this utility model embodiment, due to the additional bending stiffness provided by the channel steel purlin, the downward deflection deformation of the floor deck can be reduced during concrete pouring, thereby increasing its maximum applicable span for unsupported construction.

[0012] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A plan view of a steel truss floor deck provided in an embodiment of the present invention is shown;

[0015] Figure 2 It shows along Figure 1 A cross-sectional view along the short side of the floor decking, shown by section AA in the middle.

[0016] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0017] Figure 4 It shows along Figure 1 The sectional view along the short side of the floor decking is shown in section BB.

[0018] icon:

[0019] 1-Reinforcing steel truss, 2-Channel steel purlin, 3-Fixed connector, 4-Bottom formwork, 21-Upper flange plate, 22-Web plate, 23-Lower flange plate, 31-Screw, 32-Nut, 41-First bottom formwork, 42-Second bottom formwork. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] This utility model embodiment provides a steel truss floor deck, which is a steel truss floor deck that does not require removal of the bottom formwork. For example... Figure 1 As shown, Figure 1 A plan view of the steel truss floor deck is shown. The steel truss floor deck includes: a steel truss 1, channel steel purlins 2, fixing connectors 3, and a bottom formwork 4. The channel steel purlins 2 have a C-shaped opening and are installed sideways on the surface of the bottom formwork 4 via the fixing connectors 3; it can be understood that the sideways installation means that the shorter side of the opening is placed on the bottom formwork 4. In this embodiment of the invention, the fixing connectors 3 can be self-tapping screws, etc., which will not be elaborated here. Figure 1 It is easy to see that there are multiple steel trusses 1, and these multiple steel trusses 1 are arranged in parallel. The number of channel steel purlins 2 is twice the number of steel trusses 1, that is, one steel truss corresponds to two channel steel purlins 2, and the two channel steel purlins 2 can be arranged with their openings facing each other. From Figure 1 As can be seen from this, the channel steel purlins 2 are also arranged in parallel to accommodate the steel truss 1.

[0024] Specifically, see Figure 2 and Figure 3 As shown, Figure 2 It shows along Figure 1 The sectional view along the short side of the floor decking, shown by section AA in the middle. Figure 3 Then it is Figure 2 A magnified view of a portion of the image. (See attached image.) Figure 3 As shown, the channel steel purlins 2 are placed on the upper surface of the bottom formwork 4 and fixedly connected by the fixing connectors 3. Each steel truss 1 is fixedly installed on the upper surface of two channel steel purlins 2, that is, the lower ends of both sides of each steel truss 1 are fixedly connected to the upper surfaces of two channel steel purlins 2 to form an integral structure. It should be noted that this can be used as a reference. Figure 4 To further understand the specific structure of this steel truss floor slab, among other things, Figure 4 It shows along Figure 1 The sectional view along the short side of the floor decking is shown in section BB.

[0025] The steel truss floor deck provided in this embodiment of the utility model, due to the additional bending stiffness provided by the channel steel purlin 2, can reduce the downward deflection of the floor deck during concrete pouring, thereby increasing its maximum applicable span for unsupported construction.

[0026] Optionally, holes for installing the fixing connectors 3 are reserved on the surface of the bottom template 4 and the channel steel purlin 2 (not directly shown in the figure). It should be noted that the positions of the reserved holes on the channel steel purlin 2 and the reserved holes (such as pilot holes) on the surface of the bottom template 4 should be basically coincident to facilitate the subsequent connection operation using the fixing connectors 3.

[0027] Optionally, such as Figure 3 As shown, the fixing connector 3 is a screw and nut combination. This embodiment of the invention uses a screw and nut combination as the fixing connector 3, which is superior to the traditional self-tapping screw connection method; the connection using a screw and nut combination is more reliable.

[0028] Optionally, such as Figure 3 As shown, the screw and nut assembly includes a screw 31 and a nut 32. The screw 31 passes through the pre-drilled holes in the bottom template 4 and the channel steel purlin 2 from bottom to top; the nut 32 is placed at the screw 31 from top to bottom. For example, the nut 32 can be tightened using a tool such as an electric wrench, thereby fixing the channel steel purlin 2 to the upper surface of the bottom template 4. It should be noted that the screw and nut assembly can be made of stainless steel or other types of materials whose durability and strength meet the design specifications; this embodiment of the utility model does not specifically limit this.

[0029] Optionally, such as Figure 3As shown, the channel steel purlin 2 includes: an upper flange plate 21, a web plate 22, and a lower flange plate 23; the steel truss 1 is installed on the surface of the upper flange plate 21, and the lower flange plate 23 is installed on the surface of the bottom template 4. It should be noted that before the channel steel purlin 2 is bent and formed, a semi-circular hole can be opened in the steel plate at the position corresponding to the bent upper flange plate 21, and a round hole can be opened in the steel plate at the position corresponding to the bent lower flange plate 23, for welding the steel truss 1 and installing the fixing connector 3.

[0030] Optionally, the steel truss 1 is welded to the channel steel purlin 2.

[0031] Optionally, the bottom formwork 4 is made of cement-based material or other types of material whose durability and strength meet the design specifications, preferably cement-based material. The channel steel purlin 2 is made of galvanized steel sheet or other types of material whose durability and strength meet the design specifications, preferably galvanized steel sheet.

[0032] The following describes a specific installation method for this steel truss floor deck. It should be noted that the number of bottom formwork pieces 1 can be adjusted according to actual use. The following example uses two bottom formwork pieces 1 (the structure can be found in [reference needed]). Figure 1 (As shown).

[0033] Step 1) Align the first bottom template 41 and the second bottom template 42 and place them flat. First, drill holes at the connection position of the screw and nut assembly.

[0034] Step 2) Before bending and forming the channel steel purlin 2, a semi-circular hole can be made in the steel plate at the position corresponding to the upper flange plate 21 after bending and forming, and a round hole can be made in the steel plate at the position corresponding to the lower flange plate 23 after bending and forming, for welding the steel truss 1 and installing the screw and nut assembly. The round hole made at the position of the lower flange plate 23 should be basically coincident with the position of the pilot hole on the bottom template 4 to facilitate the subsequent screw and nut connection operation.

[0035] Step 3) Place the channel steel purlin 2 on top of the bottom template 4, and use screws 31 to pass through the bottom template 4 and the lower flange plate 23 of the channel steel purlin 2 from bottom to top. Then, place the nut 32 at the screw 31 from top to bottom and tighten the nut with an electric wrench or other tools to fix the channel steel purlin 2 to the upper surface of the bottom template 4.

[0036] Step 4) Place the steel truss 1 (the finished product that has been welded) on top of the channel steel purlin 2. The two lower chords of the steel truss 1 contact the upper flange plate 21 of the channel steel purlin 2 respectively. Then, at certain intervals along the length of the floor deck, fix the steel truss 1 and the channel steel purlin 2 by electric welding.

[0037] Step 5) The processing of the steel truss floor deck is now complete and it can be placed in the storage area for later use.

[0038] The steel truss floor decking provided in this embodiment of the invention has the following advantages compared with the prior art:

[0039] 1. During the processing of floor decking, the bottom formwork does not need to be flipped, reducing the risk of cracking and deformation of the bottom formwork;

[0040] 2. Compared to traditional self-tapping screw connections, screw and nut combination connections are stronger and safer;

[0041] 3. The channel steel purlins provide additional bending stiffness and deformation coordination for the floor deck, reducing the downward deflection of the floor deck during concrete pouring and normal use.

[0042] 4. The welding surface between the upper flange plate of the channel steel purlin and the lower chord of the reinforcing bar is larger, which improves the welding quality and the tensile and shear bearing capacity of the connection node area.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A steel trussed floor deck characterized by, Including: Steel bar truss (1), channel purlin (2), fixed connecting piece (3) and bottom formwork (4); The number of steel bar trusses (1) is multiple, and the number of channel purlins (2) is twice the number of steel bar trusses (1); The channel purlin (2) is placed on the upper surface of the bottom formwork (4) and is fixedly connected through the fixed connecting piece (3); each steel bar truss (1) is fixedly installed on the upper surface of two channel purlins (2).

2. The steel reinforced trussed floor deck according to claim 1, wherein, The bottom formwork (4) surface and the channel purlin (2) are both reserved with holes for installing the fixed connecting piece (3).

3. The steel reinforced trussed floor deck according to claim 1, wherein, The fixed connecting piece (3) is a screw and nut combination.

4. The steel trussed floor deck according to claim 3, wherein, The screw and nut combination includes a screw (31) and a nut (32), the screw (31) sequentially passes through the reserved holes of the bottom formwork (4) and the channel purlin (2) from bottom to top; the nut (32) is placed on the screw (31) from top to bottom.

5. The steel joist floor deck of claim 1, wherein, The channel purlin (2) includes an upper flange plate (21), a web plate (22) and a lower flange plate (23); the steel bar truss (1) is installed on the surface of the upper flange plate (21), and the lower flange plate (23) is installed on the surface of the bottom formwork (4).

6. The steel joist floor deck of claim 1, wherein, The steel bar truss (1) and the channel purlin (2) are welded.

7. The steel reinforced trussed floor deck according to claim 1, wherein, The material of the bottom formwork (4) is cement-based material; the channel purlin (2) is a galvanized steel plate.

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