A detachable snap-on steel bar truss floor deck and construction method

Abstract

The present application relates to a detachable snap-on steel truss floor deck, comprising a base plate and a steel truss, a connecting device mounted on the base plate, the steel truss being detachably mounted on the base plate via the connecting device, the steel truss comprising two lower chord steel bars, the connecting device comprising a base and a clamping block, the base being mounted on the base plate, the clamping blocks being provided in two pieces, both of which are slidably mounted on the base along the length of the base, the two clamping blocks having slots formed on opposite sides thereof, the two clamping blocks being slidably mounted so as to clamp the two lower chord steel bars into the two slots, respectively. The present application has the effect of expanding the scope of application of the connecting device.

Description

Technical Field

[0001] The present application relates to the field of floor deck installation, and in particular to a detachable snap-on steel bar truss floor deck and a construction method. Background Art

[0002] A truss made of steel bars as top and bottom chords and webs, connected by resistance spot welding, is called a steel truss. A composite load-bearing slab made by resistance spot welding the steel truss to the base plate is called a steel truss floor deck.

[0003] The existing Chinese invention patent with publication number CN115839146A discloses a detachable snap-in connection device for an assembled steel truss floor deck, including a bottom formwork, a steel truss, and the steel truss also includes a lower chord steel bar. The surface of the bottom formwork is provided with a disassembly assembly, the disassembly assembly includes a disassembly sleeve, the disassembly sleeve is fixed through the bottom formwork surface, and an extrusion block is slidably installed inside the disassembly sleeve. The upper end of the disassembly sleeve is rotatably installed with a rotating shaft 2, and the rotating shaft 2 is fixedly connected to a movable rod. The upper part of the movable rod is fixedly installed with a male buckle, and the lower end of the extrusion block is fixedly connected to a connecting column, and the connecting column is threaded and installed at the lower end of the disassembly sleeve; the upper end of the bottom formwork is provided with a snap-in assembly; the snap-in assembly includes a connecting seat, the lower surface of the connecting seat is attached to the upper end surface of the bottom formwork, the lower end of the connecting seat is concave with a positioning slot, and a female buckle is opened inside the positioning slot. The disassembly sleeve and the surface of the movable rod are both slidably installed inside the positioning slot, the male buckle is movably clamped inside the female buckle, the surface of the connecting seat is rotatably installed with a rotating shaft, and a bent hook is fixedly installed on the surface of the rotating shaft. The upper end of the bent hook has an arc-shaped structure and is clamped on the surface of the lower chord steel bar.

[0004] With respect to the above-mentioned related technologies, the existing connection device fixes the steel truss by hooking the lower chord steel bars with hooks. The two hooks on the connecting seat in the existing technology are hinged and fixed at a specific position. It is only applicable to the steel truss with the spacing between the two lower chord steel bars and the spacing between the two hooks matching each other, and the scope of application is relatively narrow. Summary of the Invention

[0005] In order to improve the application scope of the connection device, the present application provides a detachable snap-on steel bar truss floor deck.

[0006] The present application provides a detachable clip-on steel truss floor decking plate adopting the following technical solution:

[0007] A detachable snap-on steel truss floor deck comprises a base plate and a steel truss, a connecting device is installed on the base plate, and the steel truss is detachably installed on the base plate through the connecting device, the steel truss comprises two lower chord steel bars, the connecting device comprises a base and a clamping block, the base is installed on the base plate, there are two clamping blocks, both of which are slidably arranged on the base along the length direction of the base, and slots are provided on the opposite sides of the two clamping blocks, and the two clamping blocks slide to clamp the two lower chord steel bars into the two slots respectively.

[0008] By adopting the above technical solution, the lower chord steel bars are clamped by a sliding clamping block. The sliding of the clamping block makes the spacing between the two slots adjustable, thereby being suitable for steel trusses with different distances between the two lower chord steel bars, thereby improving the applicability of the connecting device.

[0009] Optionally, a fixing groove is provided on the base along the length direction, a fixing block is slidably provided in the fixing groove, a fixing platform is fixed on the clamping block, a fixing bolt is threadedly connected to the fixing platform, and an adjustment groove is provided on the base on the side of the fixing groove facing the fixing platform and running through the length direction of the base, the fixing bolt is slidably provided in the adjustment groove, the adjustment groove is connected to the fixing groove, and the fixing bolt passes through the adjustment groove and is threadedly connected to the fixing block.

[0010] By adopting the above technical solution, the fixing groove is used to prevent the sliding of the fixed block. The fixing bolt is tightened by rotating the fixing bolt to fix the fixed platform and the fixed block, thereby limiting the sliding of the clamping block. When the fixing bolt is loosened, the fixed platform and the fixed block are released from the fixed state, and the clamping block can be driven to slide.

[0011] Optionally, a baffle is rotatably provided on the clamping block, and the baffle is blocked at the opening of the slot by rotation.

[0012] By adopting the above technical solution, the provision of the baffle can reduce the probability of the lower chord steel bar escaping from the slot.

[0013] Optionally, an elastic member is provided between the baffle and the clamping block, and the elastic member drives the baffle to block the slot opening. A driving rod is fixed on the baffle, and an abutment block is slidingly provided in the clamping block. The abutment block slides toward or away from the driving rod. The abutment block slides toward the driving rod and abuts the driving rod to limit the baffle from blocking the slot opening. The abutment block slides toward the direction away from the driving rod and disengages from the driving rod, and the baffle blocks the slot opening through the elastic force of the elastic member.

[0014] By adopting the above technical solution, the setting of the elastic member can reduce the probability of the baffle being out of the blocking state, thereby reducing the probability of the lower chord steel bar being out of the slot. The setting of the abutment block can limit the rotation of the baffle before the lower chord steel bar is engaged in the slot, thereby facilitating the engagement of the lower chord steel bar.

[0015] Optionally, the abutment block is connected to a driving mechanism, which includes a power rod and a linkage rod. The power rod is slidably set on the clamping block at the bottom of the slot, and the power rod slides toward or away from the slot opening. The linkage rod is set between the abutment block and the power rod, one end of the linkage rod is fixed on the abutment block, and the other end of the linkage rod is chamfered. The power rod abuts on the chamfer, and the power rod slides away from the slot opening to drive the linkage rod to drive the abutment block to slide away from the driving rod.

[0016] By adopting the above technical solution, the setting of the driving mechanism can facilitate the sliding of the abutment block. The power rod is inserted in the slot. When the lower chord steel bar is engaged in the slot, the power rod will be driven, thereby driving the abutment block to disengage through the linkage rod. At this time, the baffle can be rotated under the elastic force of the elastic member to block the slot opening.

[0017] Optionally, a reset member is provided at one end of the linkage rod away from the abutment block, and the reset member drives the linkage rod and the power rod to reset.

[0018] By adopting the above technical solution, the setting of the reset member can drive the linkage rod and the power rod to reset when the lower chord steel bar is out of the slot.

[0019] Optionally, an abutment is provided on the side of the linkage rod away from the power rod, which limits the linkage rod from sliding in the direction away from the power rod. The abutment slides toward or away from the linkage rod, and the abutment extends away from one end of the linkage rod and abuts against a clamping block to set a limit block.

[0020] By adopting the above technical solution, the abutment member abuts the linkage rod to limit the linkage rod from being separated from the power rod, so that the power rod can normally drive the abutment block. When the abutment member is away from the linkage rod, the linkage rod can be separated from the power rod and reset, so that the abutment block is reset to limit the rotation of the driving rod, thereby limiting the rotation of the baffle and reducing the probability of the baffle being driven to rotate by external force and causing the lower chord steel bar to be separated.

[0021] Optionally, the limit block is fixed on the fixing bolt, and a wedge-shaped surface is provided on the limit block toward the abutment part. The fixing bolt is tightened to cause the abutment part to slide in a direction away from the linkage rod.

[0022] By adopting the above technical solution, the limiting block is fixed on the fixing bolt, which can realize the linkage between the fixing bolt and the abutment member.

[0023] A construction method using a detachable snap-on steel truss floor deck comprises the following steps:

[0024] S1: Install the connecting device and install it on the base plate;

[0025] S2: Place the steel truss on the base;

[0026] S3: Fix the steel truss, drive the clamping block to slide so that the two lower chord steel bars of the steel truss are clamped in the clamping groove, and fix the clamping block;

[0027] S4: Install the floor decking, install the floor decking on the preset steel beams in the house and pour concrete.

[0028] By adopting the above technical solution, the steel truss is clamped and fixed by the sliding clamping block, which facilitates the disassembly and replacement of the steel truss when the steel truss is damaged.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The lower chord steel bars are clamped by a sliding clamping block. The sliding of the clamping block makes the distance between the two slots adjustable, so that the two lower chord steel bars are at different distances from the steel truss, which increases the applicability of the connection device.

[0031] 2. The fixing groove is used to prevent the fixed block from sliding. Tighten the fixing bolts by turning them to fix the fixed platform and the fixed block, thereby limiting the sliding of the clamping block. Loosen the fixing bolts to release the fixed platform and the fixed block from the fixed state, and then the clamping block can be driven to slide.

[0032] 3. The setting of the baffle can reduce the probability of the lower chord steel bar escaping from the slot;

[0033] 4. The provision of the elastic member can reduce the probability of the baffle being out of the blocking state, thereby reducing the probability of the lower chord steel bar being out of the slot. The provision of the abutment block can limit the rotation of the baffle before the lower chord steel bar is engaged in the slot, thereby facilitating the engagement of the lower chord steel bar.

[0034] 5. The setting of the driving mechanism can facilitate the sliding of the abutment block. The power rod is inserted into the slot. When the lower chord steel bar is engaged with the slot, it drives the power rod, thereby driving the abutment block to disengage through the linkage rod. At this time, the baffle can rotate under the elastic force of the elastic member to block the slot opening;

[0035] 6. The abutment against the linkage rod can limit the linkage rod from being separated from the power rod, so that the power rod can normally drive the abutment block. When the abutment is away from the linkage rod, the linkage rod can be separated from the power rod and reset, so that the abutment block is reset to limit the rotation of the driving rod, limit the rotation of the baffle, and reduce the probability of external force driving the baffle to rotate and causing the lower chord steel bar to be separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is the overall structural diagram of this embodiment.

[0037] Figure 2 It is a structural view of the connecting device of this embodiment.

[0038] Figure 3 It is a cross-sectional view of the connecting device of this embodiment.

[0039] Figure 4 yes Figure 3 Magnified view at point A in the middle.

[0040] Figure 5 It is a cross-sectional view of the connecting device in use according to this embodiment.

[0041] Figure 6 yes Figure 5 Magnified view at point B.

[0042] Explanation of the accompanying reference numerals: 1. Bottom plate; 2. Steel bar truss; 21. Lower chord steel bar; 22. Upper chord steel bar; 23. Web member; 3. Connecting device; 31. Base; 32. Clamping block; 4. Slot; 5. Clamping slide; 6. Fixing slot; 7. Fixing block; 8. Fixing platform; 9. Fixing bolt; 10. Adjusting slot; 11. Baffle; 12. Elastic member; 13. Drive rod; 14. Abutment block; 15. Drive mechanism; 151. Power rod; 152. Linkage rod; 16. Chamfer; 17. Reset member; 18. Abutment member; 19. Limiting block; 20. Wedge surface. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-6 This application is described in further detail.

[0044] The present application discloses a detachable snap-on steel bar truss floor deck. Figure 1 and Figure 2 , including a base plate 1 and a steel truss 2, a connecting device 3 is detachably mounted on the base plate 1 by bolts, and the steel truss 2 is detachably mounted on the base plate 1 by the connecting device 3. The steel truss 2 includes two lower chord steel bars 21, an upper chord steel bar 22 and a plurality of webs 23 uniformly welded along the length direction of the upper chord steel bar 22. The webs 23 connect the upper chord steel bar 22 and the lower chord steel bar 21. The connecting device 3 includes a base 31 detachably mounted on the base plate 1 by bolts and two clamping blocks 32 slidably arranged on the base 31. The two clamping blocks 32 are both slidably arranged on the base along the length direction of the base 31. On 31, a slot 4 is provided on the opposite side of the two clamping blocks 32, and a clamping slot 5 for the clamping block 32 to slide is provided on the base 31 along the length direction. When the clamping block 32 slides in the clamping slot 5, one end of the slot 4 is flush with the top of the base 31, and the two clamping blocks 32 slide to clamp the two lower chord steel bars 21 in the two slots 4 respectively. The lower chord steel bars 21 are clamped by the sliding clamping blocks 32. The sliding of the clamping blocks 32 makes the spacing between the two slots 4 adjustable, so that it is suitable for the two lower chord steel bars 21 at different distances from the steel trusses 2, thereby improving the applicability of the connecting device 3.

[0045] Reference Figure 2 and Figure 3A fixing groove 6 is provided on the base 31 along the length direction, and a fixing block 7 is slidably provided in the fixing groove 6. A fixing platform 8 is fixed on the clamping block 32, and a fixing bolt 9 is threadedly connected to the fixing platform 8. The base 31 is provided with an adjustment groove 10 running through the length direction of the base 31 on the side of the fixing groove 6 facing the fixing platform 8. The fixing bolt 9 is slidably provided in the adjusting groove 10. The adjusting groove 10 is connected to the fixing groove 6. After the fixing groove 6 and the adjusting groove 10 are connected, a groove body with a T-shaped cross-section is formed. The fixing bolt 9 passes through the adjusting groove 10 and is threadedly connected to the fixing block 7. The fixing groove 6 is used for the sliding of the fixing block 7. The fixing bolt 9 is rotated to tighten the fixing bolt 9 to fix the fixing platform 8 and the fixing block 7, thereby limiting the sliding of the clamping block 32. When the fixing bolt 9 is loosened, the fixing platform 8 and the fixed block 7 are out of the fixed state, and the clamping block 32 can be driven to slide.

[0046] Reference Figure 2 、 Figure 3 and Figure 4 A baffle 11 is rotatably provided on the holding block, and the baffle 11 blocks the opening of the card slot 4 by rotation; an elastic member 12 is provided between the baffle 11 and the clamping block 32. In this embodiment, the elastic member 12 is a torsion spring. The elastic member 12 drives the baffle 11 to block the opening of the card slot 4 through elastic force. A driving rod 13 is fixed on the baffle 11, and an abutment block 14 is slidingly provided in the clamping block 32. The abutment block 14 slides toward or away from the driving rod 13, and the abutment block 14 slides toward the driving rod 13 to abut the driving rod 13 to limit the baffle 11 The opening of the blocking slot 4 is blocked, and the abutment block 14 slides away from the driving rod 13 in the direction away from the driving rod 13. The baffle 11 blocks the opening of the slot 4 through the elastic force of the elastic member 12. The setting of the baffle 11 can reduce the probability of the lower chord steel bar 21 escaping from the slot 4. The setting of the elastic member 12 can reduce the probability of the baffle 11 escaping from the blocking state, thereby reducing the probability of the lower chord steel bar 21 escaping from the slot 4. The setting of the abutment block 14 can limit the rotation of the baffle 11 before the lower chord steel bar 21 is engaged in the slot 4, thereby facilitating the engagement of the lower chord steel bar 21.

[0047] Reference Figure 5 and Figure 6The abutment block 14 is connected to a driving mechanism 15, which includes a power rod 151 that is slidably arranged on the clamping block 32 at the bottom of the slot 4 and a linkage rod 152 that is arranged between the abutment block 14 and the power rod 151. The power rod 151 slides toward or away from the opening of the slot 4. The linkage rod 152 is integrally formed with a horizontal rod and a vertical rod. The horizontal rod of the linkage rod 152 is fixed on the abutment block 14 away from one end of the vertical rod. The vertical rod of the linkage rod 152 is away from one end of the horizontal rod and a chamfer 16 is provided. The power rod 151 abuts on the chamfer 16. The power rod 151 slides away from the opening of the slot 4 to drive the linkage rod 152 to drive the abutment block 14 away from the driving rod 13. When the lower chord steel bar 21 is clamped into the slot 4 When the lower chord steel bar 21 drives the power rod 151 to slide, the power rod 151 abuts the chamfer 16, and the vertical rod of the linkage rod 152 is driven to slide toward the horizontal rod through the chamfer 16. The horizontal rod drives the abutment block 14, so that the abutment block 14 disengages from the driving rod 13, and the baffle 11 blocks the opening of the slot 4 under the action of the elastic member 12; the linkage rod 152 is provided with a reset member 17 at one end away from the abutment block 14, and the reset member 17 is selected from a reset spring. When the steel truss 2 needs to be disassembled, the baffle 11 is rotated to take out the lower chord steel bar 21. At this time, the linkage rod 152 and the power rod 151 are reset under the action of the elastic force of the reset member 17. The setting of the reset member 17 can drive the linkage rod 152 and the power rod 151 to reset when the lower chord steel bar 21 disengages from the slot 4.

[0048] Reference Figure 5 and Figure 6, the linkage rod 152 can slide in the clamping block 32 toward or away from the power rod 151 at the same time. One end of the reset member 17 is fixed on the clamping block 32 and the other end is fixed with a slider. The reset member 17 slides relative to the linkage rod 152 through the slider, thereby reducing the influence of the sliding of the linkage rod 152 on the reset member 17. The linkage rod 152 is provided with an abutment 18 on the side away from the power rod 151. The abutment 18 limits the linkage rod 152 from sliding in the direction away from the power rod 151. The abutment 18 slides in the direction close to or away from the linkage rod 152. The abutment 18 extends away from the end of the linkage rod 152 and abuts against the clamping block 32 to form a limit block 19; the limit block 19 is fixed on the fixing bolt 9. A wedge-shaped surface 20 is provided toward one side of the abutment 18, and the fixing bolt 9 is tightened to cause the abutment 18 to slide toward and away from the linkage rod 152. The wedge-shaped surface 20 abuts against the abutment 18, and the rotation and sliding of the fixing bolt 9 causes the abutment 18 to abut at a position that changes, thereby driving the abutment 18 to slide. When the fixing bolt 9 is tightened, the abutment 18 slides toward and away from the linkage rod 152. At this time, the linkage rod 152 slides away from the power rod 151 and is disengaged from the drive of the power rod 151. The linkage rod 152 rebounds under the elastic force of the reset member 17, causing the abutment block 14 to reset and abut against the rotation limiting baffle 11 on the driving rod 13, thereby reducing the probability of the baffle 11 being driven by external force to rotate and cause the lower chord steel bar 21 to disengage.

[0049] A construction method using a detachable snap-on steel truss floor deck comprises the following steps: S1: installing a connecting device 3, which is mounted on a base plate 1 by means of bolts; S2: placing a steel truss 2, which is mounted on a base 31; S3: fixing the steel truss 2, driving a clamping block 32 to slide so that two lower chord steel bars 21 of the steel truss 2 are clamped into a clamping groove 4, and fixing the clamping block 32; S4: installing the floor deck, which is mounted on a pre-set steel beam in the house and pouring concrete, and the construction of the floor is completed after the concrete solidifies.

[0050] The implementation principle of the embodiment of the present application is as follows: the base 31 is installed on the base plate 1 by bolts, and then the welded steel truss 2 is placed on the base 31, and the clamping block 32 is driven to slide so that the lower chord steel bar 21 of the steel truss 2 is clamped into the slot 4. During this period, the lower chord steel bar 21 drives the power rod 151 to slide, and the power rod 151 drives the linkage rod 152, and the linkage rod 152 drives the abutment block 14 to slide in the direction away from the driving rod 13. The driving rod 13 is disengaged from the abutment block 14 so that the baffle 11 blocks the slot opening under the elastic force of the torsion spring, restricting the lower chord steel bar 21 from disengaging from the slot 4, and then the fixing bolt 9 is rotated to fix the fixing platform 8 and the fixing plate to each other. The clamping block 32 is fixed, during which the fixing bolt 9 slides to cause the limit block 19 to slide, and the linkage rod 152 slides in the direction away from the power rod 151 and disengages from the abutment of the power rod 151. The linkage rod 152 is reset under the elastic force of the reset member 17. At this time, the abutment block 14 is reset to abut against the side of the driving rod 13, limiting the rotation of the baffle 11. When the steel truss 2 needs to be disassembled, the fixing bolt 9 is loosened to make the limit block 19 drive the linkage rod 152 to slide toward the power rod 151. Under the action of the chamfer 16, the linkage rod 152 drives the abutment block 14 to disengage from the driving block, and then the baffle 11 is rotated to open the slot 4 to take out the lower chord steel bar 21 to complete the disengagement of the steel truss 2.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A detachable snap-on steel truss floor deck, comprising a base plate (1) and a steel truss (2), wherein a connecting device (3) is installed on the base plate (1), and the steel truss (2) is detachably mounted on the base plate (1) via the connecting device (3), characterized in that: The steel bar truss (2) includes two lower chord steel bars (21), and the connecting device (3) includes a base (31) and a clamping block (32). The base (31) is installed on the bottom plate (1). The clamping blocks (32) are two, and the two clamping blocks (32) are both slidably arranged on the base (31) along the length direction of the base (31). The two clamping blocks (32) are provided with a clamping groove (4) on the opposite sides. The two clamping blocks (32) are respectively clamped in the two clamping grooves (4) by sliding. The base (31) is provided with a fixing groove (6) extending through the longitudinal direction, a fixing block (7) is slidably provided in the fixing groove (6), a fixing platform (8) is fixedly provided on the clamping block (32), a fixing bolt (9) is threadedly connected to the fixing platform (8), an adjusting groove (10) extending through the longitudinal direction of the base (31) is provided on the side of the fixing groove (6) facing the fixing platform (8), the fixing bolt (9) is slidably provided in the adjusting groove (10), the adjusting groove (10) is connected to the fixing groove (6), and the fixing bolt (9) passes through the adjusting groove (10) and is threadedly connected to the fixing block (7); A baffle (11) is rotatably provided on the clamping block (32), and the baffle (11) is blocked at the opening of the clamping slot (4) by rotation; An elastic member (12) is provided between the baffle (11) and the clamping block (32), and the elastic member (12) drives the baffle (11) to block the opening of the card slot (4). A driving rod (13) is fixed on the baffle (11), and an abutting block (14) is provided in the clamping block (32) for sliding movement. The abutting block (14) slides toward or away from the driving rod (13). The abutting block (14) slides toward the driving rod (13) and abuts against the driving rod (13) to limit the baffle (11) from blocking the opening of the card slot (4). The abutting block (14) slides toward and away from the driving rod (13) and disengages from the driving rod (13). The baffle (11) blocks the opening of the card slot (4) through the elastic force of the elastic member (12); The abutment block (14) is connected to a driving mechanism (15), and the driving mechanism (15) includes a power rod (151) and a linkage rod (152). The power rod (151) is slidably arranged on the clamping block (32) at the bottom of the card slot (4). The power rod (151) slides toward or away from the opening of the card slot (4). The linkage rod (152) is arranged between the abutment block (14) and the power rod (151). One end of the linkage rod (152) is fixed on the abutment block (14), and the other end of the linkage rod (152) is provided with a chamfer (16). The power rod (151) abuts against the chamfer (16). The power rod (151) slides away from the opening of the card slot (4) to drive the linkage rod (152) to drive the abutment block (14) to slide away from the driving rod (13).

2. The detachable snap-on steel bar truss floor deck according to claim 1, characterized in that: A reset member (17) is provided at one end of the linkage rod (152) facing away from the abutment block (14), and the reset member (17) drives the linkage rod (152) and the power rod (151) to reset.

3. The detachable snap-on steel bar truss floor deck according to claim 2, characterized in that: A contact piece (18) is provided on the side of the linkage rod (152) facing away from the power rod (151). The contact piece (18) limits the linkage rod (152) from sliding in a direction away from the power rod (151). The contact piece (18) slides in a direction close to or away from the linkage rod (152). The end of the contact piece (18) away from the linkage rod (152) extends out of the clamping block (32) and contacts a limit block (19).

4. The detachable snap-on steel bar truss floor deck according to claim 3, characterized in that: The limit block (19) is fixed on the fixing bolt (9), and a wedge-shaped surface (20) is provided on the limit block (19) toward the side of the abutment member (18). Tightening the fixing bolt (9) causes the abutment member (18) to slide in a direction away from the linkage rod (152).

5. A construction method using the detachable snap-on steel bar truss floor deck according to claim 4, comprising the following steps: S1: Install the connecting device (3), and install the connecting device (3) on the base plate (1); S2: placing the steel truss (2), placing the steel truss (2) on the base (31); S3: Fix the steel truss (2), drive the clamping block (32) to slide so that the two lower chord steel bars (21) of the steel truss (2) are clamped in the clamping groove (4), and fix the clamping block (32); S4: Install the floor decking, install the floor decking on the preset steel beams in the house and pour concrete.

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