CN212534738U

CN212534738U - Truss Floor Slab

Info

Publication number: CN212534738U
Application number: CN202022343074.9U
Authority: CN
Inventors: 周建滨; 王勇; 王浩; 杜坤; 徐振生; 王志国; 刘亚莉; 郭慧娟
Original assignee: Shandong Construction Technology And Industrialization Center Co ltd
Current assignee: Shandong Construction Technology And Industrialization Center Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-02-12
Anticipated expiration: 2030-10-20

Abstract

The utility model provides a truss floor slab, comprising a truss, a bottom mold and a connecting piece, the truss is fixed to the bottom mold through the connecting piece, and is characterized in that the connecting piece includes a cavity piece and a fastener, and the hollow The cavity piece is fixed on the truss and fixed on the bottom mold by fasteners, the cavity piece is a pentahedron or a hexahedron, its interior is hollow, and the cross section is any one of rectangle, trapezoid, parallelogram and triangle. The truss floor slab provided by the utility model has the following advantages: the connecting piece also functions as a concrete protective layer cushion; the production process is simple, the transportation and construction are convenient; according to the traditional reinforced concrete floor slab design, no post-casting belt is required; The project cost is relatively low.

Description

Truss floor plate

Technical Field

The utility model relates to a building prefabricated component, the more definite truss floor board that says so, the utility model provides a product is arranged in the construction to bear cast in situ concrete dead weight and construction load to it is whole to superpose with cast in situ concrete, forms floor board or floor board.

Background

At present, the national strongly pushes assembly type buildings, industrial production and assembly type construction are certainly to become main construction modes in the future, most prefabricated components and parts are standardized, serialized and industrialized, especially prefabricated stairs and laminated plates are popularized and applied in a large quantity, and the development of the assembly type buildings is positively promoted. In recent years, the concrete truss composite slab is used in a large amount in the construction industry, and the product can reduce wet operation in the construction process and the using amount of construction templates and scaffolds, reduce labor consumption, reduce construction difficulty and improve construction efficiency. The existing concrete truss composite slab is manufactured in advance to form a truss consisting of an upper chord member, a web member and a lower chord member, the lower chord member and part of the web member are embedded into a concrete bottom plate when the concrete bottom plate is poured to form the concrete truss composite slab, and the lower chord member is simultaneously used as a longitudinal inner rib of the concrete bottom plate. The thickness of the concrete truss composite slab with the structure is required to be ensured to be more than 60mm, otherwise, the bottom plate can be distorted, the requirement on the rigidity of the composite slab in the building construction process cannot be met, the larger the thickness of the concrete bottom plate is, the larger the self weight is, so that the self weight of the whole structure of the building is increased, the volume of foundation structural members such as beams, columns and walls is increased, the utilization rate of the indoor area of the building and the floor height clearance are reduced, the strength of the concrete truss composite slab is also limited, cracks are easily generated in the transportation and installation processes, and the defective rate is higher.

Thus, there are many disadvantages and problems associated with precast concrete composite slabs, which are described in the following.

1. Complicated production process and inconvenient transportation and installation

At present, the precast concrete laminated slab production line adopted by most enterprises in China has large equipment investment and low automation degree, belongs to semi-mechanical and semi-manual production, and mostly adopts manual operation in the procedures of mold assembly, reinforcement, concrete leveling and the like, so that the production process is complex and the labor cost is high. In addition, the precast concrete composite slab has larger weight, is inconvenient to transport and install, and is easy to crack if not hoisted properly.

2. Need to set up post-cast strip, the construction degree of difficulty is big

Transverse stressed steel bars cannot be arranged in the precast concrete composite slab in a full-length mode, beard ribs need to be left on two sides, a concrete post-pouring belt of about 300mm is arranged in a slab joint connection mode, a hanging die needs to be erected, construction is complex, and difficulty is high.

3. The indoor clear height is reduced, and the construction cost is relatively high.

The precast concrete superimposed sheet is generally 60mm thick, and the upside is pour 70mm concrete at least, and floor thickness minimum is 130mm, compares with ordinary cast in situ concrete floor (ordinary span is the thick 100mm of board below 3.6m generally), uses 30mm thick concrete more, reduces indoor effective layer height 30mm, and the house comfort level reduces, and engineering cost is higher relatively.

Disclosure of Invention

The utility model aims at providing a truss floor board, it can solve the above-mentioned not enough that prior art exists. The utility model provides a truss floor board is the three-dimensional combination building carrier plate that links into an integrated whole with steel bar truss and flat board (exempt from to tear open the die block), can bear cast in situ concrete dead weight and construction load. The production process is simple, and the transportation and construction are convenient; the building can be designed according to the traditional reinforced concrete floor without arranging a post-cast strip; ensuring the indoor clear height, and the obvious technical progress and the outstanding technical effect of relatively low construction cost.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

a truss floor plate comprises a truss 10, a bottom die 20 and a connecting piece 30, wherein the truss 10 is fixed to the bottom die 20 through the connecting piece 30, the connecting piece 30 comprises a cavity piece 31 and a fastening piece 32, and the cavity piece 31 is fixed on the truss 10 and is fixed to the bottom die 20 through the fastening piece 32.

Further, in order to reduce the cost and achieve a more firm connection between the cavity 31 and the truss 10 and the bottom die 20, as described above, in the truss floor slab, the cavity 31 is a pentahedron or a hexahedron, the interior of the cavity is hollow, and the cross section is any one of a rectangle, a trapezoid, a parallelogram and a triangle.

Further, in the modification of the cavity member 31, such as the truss floor slab, the pentahedron or hexahedron does not have two planes intersecting with the plane of the bottom mold 20.

Further, in order to achieve more convenient and reliable connection between the cavity member 31 and the bottom mold 20, as described above, in the truss floor slab, a through hole is formed in the bottom mold 20 at a position corresponding to the cavity member 31, the fastener 32 penetrates through the through hole and is connected to the cavity member 31, and the fastener 32 is any one of a screw, a bolt, a blind rivet, and a fastener.

Further, in order to realize more convenient and reliable connection between the cavity member 31 and the bottom die 20, as described above, the bottom die 20 is provided with a blind hole at a position corresponding to the contact surface of the cavity member 31, one end of the fastening member 32 is connected to the cavity member 31, and the other end of the fastening member is fixed in the blind hole.

Further, in order to overcome the defects of the traditional precast concrete bottom die, such as heavy weight, large thickness and large construction difficulty in the concrete pouring process, the bottom die 20 is a flat plate without steel bars in the body of the truss floor plate.

Further, in the truss floor slab, the flat plate without the steel bars in the body is a fiber cement flat plate. In order to ensure that the fiber cement flat plate can bear the self weight and the construction load of cast-in-place concrete in the construction process, the performance index of the fiber cement flat plate is controlled in the following range: apparent density of 1.0-1.5 g/cm3, water absorption of 20-35%, wet expansion rate of 0.2-0.3%, water retention and breaking strength of 10-20%, impact strength of 1.5-3.0 KJ/m2, aspect ratio of 55-65%, and breaking strength of 65-75%.

Further, as for the truss floor slab, the truss 10 includes an upper chord 11, a pair of lower chords 12 and a pair of web members 13, the upper chord 11 and the pair of lower chords 12 are parallel to each other and are disposed at equal distances from the pair of lower chords 12, the upper chord 11 is connected to the pair of lower chords 12 through the pair of web members 13, the pair of lower chords 12 are connected to a plurality of connecting members 30, and the connecting members 30 are connected to the pair of lower chords 12 respectively or to both chords of the pair of lower chords 12 simultaneously.

Further, the truss floor slab further comprises two supports 40, the two supports 40 are respectively arranged at two ends of the truss 10 and connected with the truss 10, each support 40 comprises an inverted T-shaped support transverse rib 42 and a support vertical rib 41, two ends of the support transverse rib 42 are connected to the pair of lower chords 12, and the upper end of the support vertical rib 41 is connected to the upper chord 11, and the lower end of the support vertical rib 41 is connected to the support transverse rib 42.

Further, in the truss floor slab as described above, at least one truss 10 is provided, and when two or more trusses 10 are provided, they are arranged in parallel with each other.

The utility model discloses in:

the truss floor plate is a three-dimensional combined template which integrates a truss and a flat plate (a disassembly-free bottom die) so as to bear the self weight of cast-in-place concrete and construction load;

the fiber cement flat plate is a plate prepared by molding, pressurizing and autoclaving cement serving as a cementing material and organic synthetic fibers, inorganic mineral fibers or cellulose fibers serving as a reinforcing material; in order to ensure that the fiber cement flat plate can bear the self weight and the construction load of cast-in-place concrete in the construction process, the performance index of the fiber cement flat plate is controlled in the following range: apparent density of 1.0-1.5 g/cm3, water absorption of 20-35%, wet expansion rate of 0.2-0.3%, water retention and breaking strength of 10-20%, impact strength of 1.5-3.0 KJ/m2, aspect ratio of 55-65%, and breaking strength ratio of 65-75%;

the truss refers to a structure in which the rods are connected to each other. Preferably, the steel bars are used as rod members to form a plane or space structure with triangular units, and the plane or space structure comprises an upper chord, a pair of lower chords and web members which are connected with each other through resistance spot welding.

The connecting piece is a special connecting piece for connecting the truss and the fiber cement flat plate (bottom die).

The support refers to the horizontal and vertical supporting steel bars welded at two ends of the steel bar truss.

The utility model provides a truss floor board connects into an organic whole truss and dull and stereotyped (exempt from to tear open the die block) three-dimensional combination building carrier plate, is particularly useful for antidetonation and establishes precautions against earthquakes regional concrete and steel construction assembly type building below intensity 8 degrees and 8 degrees, has following beneficial technological effect.

1. The connecting piece has the function of a concrete protective layer cushion block

The utility model provides a truss floor board, connecting piece wherein can have the effect of concrete protective layer cushion concurrently, for increase in truss bottom chord reinforcing bar and the construction and reserve between the horizontal atress reinforcing bar of full length laid and the die block upside and have sufficient space, concrete is pour to this reserved space in the work progress, the thickness of the outermost reinforced concrete protective layer of assurance that can be fine guarantees truss bottom chord reinforcing bar and increases the life of the horizontal atress reinforcing bar of laying.

2. Simple production process and convenient transportation and construction

The utility model provides a truss floor board, equipment investment is few, and production simple process does not need during the preparation concrete and evaporates complicated processes such as foster, compares with precast concrete superimposed sheet, and the production workman and the bottom plate weight that significantly reduce, transportation construction convenience, production installation cost of labor are lower.

3. According to the traditional reinforced concrete floor design, no post-cast strip is needed

The utility model provides a truss floor board, die block thickness generally are 10-20 mm, do not participate in the structure atress calculation, and the floor design is according to ordinary cast in situ concrete floor design, and the design calculation is simple. The upper side of the bottom die can be laid with a full-length transverse stress reinforcing steel bar, and a concrete post-pouring belt is not needed at the joint of the plate joints, so that the construction is convenient.

4. Ensuring indoor clear height and relatively low construction cost

The utility model provides a truss floor board compares with precast concrete superimposed sheet, when being applied to well, small-span floor, reducible floor thickness guarantees the clear height of floor, and floor board die surfacing at the bottom of, fungible floor cast in situ concrete template reach and exempt from to plaster the requirement. The living comfort of the house is ensured, and the construction cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a truss floor panel provided by the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is a schematic longitudinal cross-sectional view of FIG. 2;

FIG. 4 is an enlarged view of the portion A of FIG. 3;

FIG. 5 is a schematic cross-sectional view of the connector of FIG. 3 in a trapezoidal configuration;

FIG. 6 is a schematic cross-sectional view of the connector of FIG. 3 in a triangular configuration;

FIG. 7 is a schematic view of a truss floor panel according to the present invention, in which both ends of a connecting member are connected to a pair of lower chords, respectively;

FIG. 8 is an enlarged view of the portion A of FIG. 7;

FIG. 9 is a schematic left side view of the structure of FIG. 2;

fig. 10 is a perspective view of a truss floor panel provided by the present invention.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

The structure, proportion, size, etc. of the present specification are only used to cooperate with the content disclosed in the specification, so as to be known and read by the people familiar with the technology, and not to limit the practical limit condition of the present invention, so the present invention has no technical essential meaning, and any structure modification, proportion relation change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.

In this embodiment:

referring to fig. 1 to 6, the present invention provides a truss floor slab, including a truss 10, a bottom mold 20, and a connecting member 30, wherein the truss 10 is fixed to the bottom mold 20 by the connecting member 30, the connecting member 30 includes a cavity 31 and a fastening member 32, the cavity 31 is fixed to the truss 10 and is fixed to the bottom mold 20 by the fastening member 32. Further, in order to reduce the cost and achieve a more firm connection between the cavity 31 and the truss 10 and the bottom die 20, the cavity 31 is a pentahedron or a hexahedron, the interior of the cavity is hollow, and the cross section of the cavity is any one of a rectangle, a trapezoid, a parallelogram and a triangle. Furthermore, the pentahedron or hexahedron does not have two surfaces intersecting with the plane of the bottom mold 20, that is, the pentahedron or hexahedron lacks two opposite or adjacent surfaces in the vertical direction, so that the internal cavity of the pentahedron or hexahedron forms one or two openings. As will be readily understood, in the preferred embodiment, when the cavity 31 is a pentahedron, i.e. a triangular prism with a triangular cross section, the side surface of one of the sides of the triangle is attached to the bottom mold 20, and the edges formed by the side surfaces of the other two sides are connected to the truss 10, in which case the two missing sides are the two triangular bottom surfaces of the triangular prism; when the cavity 31 is a hexahedron, that is, a quadrangular prism having any one of a rectangular, trapezoidal, and parallelogram cross section, a side surface where one side is located is attached to the bottom mold 20, and another side surface opposite to the side surface attached to the bottom mold 20 is connected to the truss 10, in which case, if the two surfaces are absent, the two absent surfaces are two bottom surfaces of the quadrangular prism. Further, in order to achieve more convenient and reliable connection between the cavity member 31 and the bottom mold 20, as described above, in the truss floor slab, a through hole is formed in the bottom mold 20 at a position corresponding to the cavity member 31, the fastener 32 penetrates through the through hole and is connected to the cavity member 31, and the fastener 32 is any one of a screw, a bolt, a blind rivet, and a fastener. Of course, it is easy to understand that, in order to realize the connection between the cavity member 31 and the bottom mold 20, the bottom mold 20 may be provided with a blind hole at a position corresponding to the contact surface of the cavity member 31, and the fastening member 32 is connected to the cavity member 31 at one end and fixed in the blind hole at the other end. In order to overcome the defects of the traditional precast concrete bottom die, such as heavy weight, large thickness and large construction difficulty in the concrete pouring process, the bottom die 20 is preferably a flat plate without steel bars in the body, and more specifically, a fiber cement flat plate can be used as the bottom die 20. In order to ensure that the fiber cement flat plate can bear the self weight and the construction load of cast-in-place concrete in the construction process, the performance index of the fiber cement flat plate is controlled in the following range: apparent density of 1.0-1.5 g/cm3, water absorption of 20-35%, wet expansion rate of 0.2-0.3%, water retention and breaking strength of 10-20%, impact strength of 1.5-3.0 KJ/m2, aspect ratio of 55-65%, and breaking strength of 65-75%.

In this embodiment:

referring to fig. 1 to 6, in the truss floor slab of the present invention, the truss 10 uses steel bars as members to form a plane and space structure having triangular units, and includes an upper chord 11, a pair of lower chords 12, and a pair of web members 13, which are connected by resistance spot welding. The upper chord 11 and the pair of lower chords 12 are parallel to each other and are arranged at equal distance from the pair of lower chords 12, the upper chord 11 is respectively connected with the pair of lower chords 12 through a pair of web members 13, the pair of lower chords 12 are connected with a plurality of connecting pieces 30, and the connecting pieces 30 are respectively connected with one of the pair of lower chords 12. Preferably, the upper chord of the steel bar truss is HRB 400-grade steel bars, the lower chord of the steel bar truss is CRB 600-grade steel bars, and the web members are HPB 300-grade steel bars.

In this embodiment:

referring to fig. 1, 7 and 8, in the truss floor slab of the present invention, the truss 10 uses steel bars as members to form a plane and space structure having triangular units, and includes an upper chord 11, a pair of lower chords 12 and a pair of web members 13, which are connected by resistance spot welding. The upper chord 11 and the pair of lower chords 12 are parallel to each other and are arranged at equal distance from the pair of lower chords 12, the upper chord 11 is respectively connected with the pair of lower chords 12 through a pair of web members 13, the pair of lower chords 12 are connected with a plurality of connecting pieces 30, and two ends of each connecting piece 30 are respectively connected to two chords in the pair of lower chords 12. Preferably, the upper chord and the lower chord of the steel bar truss adopt HRB 400-grade steel bars, and the web members adopt HPB 300-grade steel bars.

In this embodiment:

referring to fig. 9, the present invention provides a truss floor slab, the truss 10 includes two supports 40, the two supports 40 are respectively disposed at two ends of the truss 10 and connected to the truss 10, the supports 40 include a horizontal support rib 42 and a vertical support rib 41 in the shape of an inverted T, two ends of the horizontal support rib 42 are connected to a pair of lower chords 12, an upper end of the vertical support rib 41 is connected to the upper chord 11, and a lower end of the vertical support rib 41 is connected to the horizontal support rib 42. Preferably, the upper chord and the lower chord of the steel bar truss adopt CRB600 grade steel bars, and the web members adopt HPB300 grade steel bars.

In this embodiment:

referring to fig. 1, 2 and 10, in the truss floor slab according to the present invention, five trusses 10 are disposed on a bottom mold 20, and the five trusses 10 are disposed in parallel. Preferably, the upper chord of the steel bar truss is CRB600 grade steel bars, the lower chord of the steel bar truss is HRB400 grade steel bars, and the web members are HPB300 grade steel bars.

To sum up, the utility model provides a truss floor board connects into an organic whole steel bar truss and fiber cement flat board (exempt from to tear open the die block) three-dimensional combination building carrier plate, has following technological progress and economic benefits.

2. Simple production process and convenient transportation and construction

The utility model provides a truss floor board, equipment investment is few, and production simple process does not need complex processes such as concreting and steam curing, compares with precast concrete superimposed sheet, and the production workman and the bottom plate weight that significantly reduce, transportation construction convenience, production installation cost of labor are lower.

4. Ensuring indoor clear height and relatively low construction cost

The utility model provides a truss floor board compares with precast concrete superimposed sheet, when being applied to well, small-span floor, reduces floor thickness, guarantees the clean height of indoor floor, and mould surfacing at the bottom of the board reaches the requirement of exempting from to plaster in fungible floor cast in situ concrete template. The living comfort of the house is ensured, and the construction cost is reduced.

5. Meets the requirements of national industrial policy and planning for developing assembly type buildings

The utility model provides a truss floor board is the most article component of present assembly type structure application mathematical theory, and project construction accords with the industry policy and the planning requirement of national development assembly type structure, optimizes, changes the type and upgrades, new and old kinetic energy conversion must play positive impetus to the structural adjustment of local assembly type structure prefabricated part article component.

6. Has wide market application prospect and development potential

The utility model provides a truss floor board, raw and other materials are easily purchased, and production facility small investment, production simple process, transportation construction convenience need not set up the post-cast strip, guarantees indoor net height, and engineering cost is lower relatively, has overcome the problem and the not enough of current precast concrete superimposed sheet existence, and the current and future assembled building of footing has extensive market perspective and development potentiality.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. Truss floor board, including truss (10), die block (20), connecting piece (30), truss (10) are fixed to die block (20) through connecting piece (30), its characterized in that, connecting piece (30) are including cavity spare (31) and fastener (32), cavity spare (31) are fixed on truss (10) and are fixed to die block (20) through fastener (32).

2. The truss floor panel according to claim 1, wherein the cavity member (31) is a pentahedron or hexahedron, which is hollow inside and has any one of a rectangular, trapezoidal, parallelogram, and triangular cross section.

3. The truss floor panel according to claim 2, wherein the pentahedron or hexahedron does not have two faces intersecting a plane in which the bottom mold (20) is located.

4. The truss floor slab as claimed in any one of claims 1 to 3, wherein the bottom mold (20) is provided with a through hole at a position corresponding to the cavity member (31), the fastening member (32) is connected to the cavity member (31) through the through hole, and the fastening member (32) is any one of a screw, a bolt, a blind rivet and a snap fastener.

5. The truss floor slab as claimed in any one of claims 1 to 3, wherein the bottom mold (20) is provided with a blind hole at a position corresponding to a contact surface of the cavity member (31), and the fastening member (32) is connected to the cavity member (31) at one end and fixed in the blind hole at the other end.

6. The truss floor panel as claimed in any one of claims 1 to 3, wherein the bottom form (20) is a flat plate without reinforcing bars in the body.

7. The truss floor slab of claim 6 wherein the unreinforced slab in the body is a fiber cement slab.

8. A truss floor slab as claimed in any one of claims 1 to 3 wherein the truss (10) comprises an upper chord (11), a pair of lower chords (12) and a pair of web members (13), the upper chord (11) and the pair of lower chords (12) being parallel to each other and equidistant from the pair of lower chords (12), the upper chord (11) being connected to the pair of lower chords (12) by the pair of web members (13), respectively, the pair of lower chords (12) having a plurality of connecting members (30) connected thereto, respectively, the connecting members (30) being connected to the pair of lower chords (12), respectively, or to both chords of the pair of lower chords (12) simultaneously.

9. The truss floor slab as claimed in claim 8, further comprising two supports (40), wherein the two supports (40) are respectively disposed at two ends of the truss (10) and connected with the truss (10), the supports (40) comprise a support transverse rib (42) and a support vertical rib (41) in an inverted T shape, two ends of the support transverse rib (42) are connected to the pair of lower chords (12), and an upper end of the support vertical rib (41) is connected to the upper chord (11) and a lower end is connected to the support transverse rib (42).

10. The truss floor panel as claimed in any one of claims 1 to 3, wherein at least one truss (10) is provided, and when there are two or more truss (10), they are arranged parallel to each other.

11. The truss floor panel as claimed in claim 4, wherein at least one truss (10) is provided, and when there are two or more truss (10), they are arranged in parallel with each other.

12. The truss floor panel as claimed in claim 5, wherein at least one truss (10) is provided, and when there are two or more truss (10), they are arranged in parallel with each other.

13. The truss floor panel of claim 6, wherein at least one truss (10) is provided, and when two or more truss (10) are provided, they are arranged in parallel with each other.

14. The truss floor panel of claim 7, wherein at least one truss (10) is provided, and when two or more truss (10) are provided, they are arranged in parallel with each other.

15. The truss floor panel of claim 8, wherein at least one truss (10) is provided, and when two or more truss (10) are provided, they are arranged in parallel with each other.

16. The truss floor panel of claim 9, wherein at least one truss (10) is provided, and when two or more truss (10) are provided, they are arranged in parallel with each other.

17. The truss floor slab as claimed in claim 4, wherein the truss (10) comprises an upper chord (11), a pair of lower chords (12) and a pair of web members (13), the upper chord (11) and the pair of lower chords (12) are parallel to each other and are arranged at equal distance from the pair of lower chords (12), the upper chord (11) is respectively connected with the pair of lower chords (12) through the pair of web members (13), the pair of lower chords (12) are respectively connected with a plurality of connecting members (30), and the connecting members (30) are respectively connected with the pair of lower chords (12) or are simultaneously connected with two chords of the pair of lower chords (12).

18. The truss floor slab as claimed in claim 5, wherein the truss (10) comprises an upper chord (11), a pair of lower chords (12) and a pair of web members (13), the upper chord (11) and the pair of lower chords (12) are parallel to each other and are arranged at equal distance from the pair of lower chords (12), the upper chord (11) is respectively connected with the pair of lower chords (12) through the pair of web members (13), the pair of lower chords (12) are respectively connected with a plurality of connecting members (30), and the connecting members (30) are respectively connected with the pair of lower chords (12) or are simultaneously connected with two chords of the pair of lower chords (12).

19. The truss floor slab as claimed in claim 6, wherein the truss (10) comprises an upper chord (11), a pair of lower chords (12) and a pair of web members (13), the upper chord (11) and the pair of lower chords (12) are parallel to each other and are arranged at equal distance from the pair of lower chords (12), the upper chord (11) is respectively connected with the pair of lower chords (12) through the pair of web members (13), the pair of lower chords (12) are respectively connected with a plurality of connecting members (30), and the connecting members (30) are respectively connected with the pair of lower chords (12) or are simultaneously connected with two chords of the pair of lower chords (12).

20. The truss floor slab as claimed in claim 7, wherein the truss (10) comprises an upper chord (11), a pair of lower chords (12) and a pair of web members (13), the upper chord (11) and the pair of lower chords (12) are parallel to each other and are arranged at equal distance from the pair of lower chords (12), the upper chord (11) is respectively connected with the pair of lower chords (12) through the pair of web members (13), the pair of lower chords (12) are respectively connected with a plurality of connecting members (30), and the connecting members (30) are respectively connected with the pair of lower chords (12) or are simultaneously connected with two chords of the pair of lower chords (12).