Prefabricated parapet wall coping

Abstract

The utility model relates to the technical field of building construction, in particular to a prefabricated parapet wall coping. The coping comprises a prefabricated metal part extending in the transverse direction, the lower end of the prefabricated metal part is provided with a clamping groove used for being matched with a wall body of the parapet wall, and the prefabricated metal part is used for being clamped and fixed to the upper end of the parapet wall. The lightning protection structure comprises a plurality of lightning protection short needles which are arranged at equal intervals in the length direction of the prefabricated metal part, the lower ends of the lightning protection short needles vertically penetrate through the prefabricated metal part and are connected with the parapet wall, the joints of the lightning protection short needles and the prefabricated metal part are sealed, and the upper ends of the lightning protection short needles are connected through lightning protection belts. By machining the prefabricated metal part in advance, the coping can be rapidly installed, the construction efficiency is improved, when the wall body of the parapet wall cracks, the prefabricated metal part does not crack, rainwater and the like are prevented from leaking into the parapet wall, the structural stability is not affected, and the service life is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, and particularly relates to a prefabricated and assembled parapet coping. Background Technique

[0002] A parapet is a low wall around the roof of a building, whose main functions are to protect personnel safety, decorate the building facade, and on the other hand, serve as the waterproof termination of the roof to prevent the waterproof layer from seeping water or rainwater from overflowing. A parapet coping is usually required to be set at the top of the parapet, which refers to setting an additional structure above the parapet of the building to increase the stability and load-bearing capacity of the wall.

[0003] Currently, the traditional method for a parapet coping is to cast in-situ reinforced concrete at the top of the parapet. The reinforced concrete coping is connected to the structural columns and ring beams inside the parapet to jointly form a structural framework, so as to utilize the parapet coping to improve the overall stiffness of the structure above the roof and prevent the parapet from collapsing.

[0004] However, during actual use, when the wall of the parapet cracks, it usually causes transverse cracks to appear in the position of the parapet coping formed by the above-mentioned cast-in-situ reinforced concrete, and then leakage occurs, affecting the use effect. At the same time, the above-mentioned parapet coping requires on-site operation, with cumbersome operations and slow construction progress, affecting the construction efficiency. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a prefabricated and assembled parapet coping. By prefabricating metal parts, the installation of the coping can be carried out quickly, improving the construction efficiency. When the wall of the parapet cracks, the prefabricated metal parts will not crack, avoiding rainwater and the like from leaking into the parapet and affecting the structural stability, and ensuring the service life.

[0006] In response to the above technical problem, the technical solution provided by the utility model is a prefabricated and assembled parapet coping, including a prefabricated metal part extending horizontally. A clamping groove adapted to the wall of the parapet is provided at the lower end of the prefabricated metal part. The prefabricated metal part is used for being clamped and fixed at the upper end of the parapet. It further includes a lightning protection structure, which includes a plurality of lightning protection short needles arranged at equal intervals along the length direction of the prefabricated metal part. The lower end of the lightning protection short needle vertically penetrates through the prefabricated metal part and is connected to the parapet. The connection between the lightning protection short needle and the prefabricated metal part is sealed, and the upper ends of the lightning protection short needles are connected by a lightning protection belt.

[0007] Furthermore, the prefabricated metal part is spliced by a plurality of prefabricated units along its length direction. The adjacent prefabricated units are in sealed cooperation, and the lightning protection short needles correspond to the prefabricated units one by one.

[0008] Furthermore, it further includes a pre-embedded metal plate, the size of the pre-embedded metal plate being adapted to the bottom surface of the card slot, the pre-embedded metal plate being used for pre-embedded fixation at the upper end of the parapet wall, and the prefabricated metal part being fixedly connected to the pre-embedded metal plate.

[0009] Furthermore, the pre-embedded metal plate is formed by splicing a plurality of unit metal plates along its length direction, and the unit metal plates correspond to the prefabricated units one by one.

[0010] Furthermore, the lightning protection structure further includes a lightning arrester prefabricated part fixed on the lower end surface of the pre-embedded metal plate, the number and position of the lightning arrester prefabricated parts being adapted to the number and position of the lightning protection short needles, and the lower end of the lightning protection short needle being used for fixed connection to the corresponding lightning arrester prefabricated part.

[0011] Furthermore, clamping blocks and clamping grooves are respectively arranged at the transverse two ends of the prefabricated unit, the sizes of the clamping blocks and the clamping grooves being adapted, and the clamping blocks on the opposite sides of adjacent prefabricated units being used for clamping in the corresponding clamping grooves and being in sealing cooperation therebetween.

[0012] Furthermore, a first U-shaped block and a second U-shaped block are respectively clamped and fixed at the transverse two ends of the prefabricated unit, the outer side surface of the first U-shaped block being flush with the corresponding end surface of the prefabricated unit, the inner side surface of the second U-shaped block being flush with the corresponding end surface of the prefabricated unit, and the middle notch of the second U-shaped block being adapted to the outer contour of the first U-shaped block, the first U-shaped block constituting the clamping block, and the middle notch of the second U-shaped block constituting the clamping groove.

[0013] Furthermore, the top surface of the prefabricated metal part is an inclined surface for inclining towards the inner side of the parapet wall.

[0014] Furthermore, convex ribs and prefabricated drip plates are respectively arranged on the longitudinal two sides of the prefabricated metal part.

[0015] Furthermore, the interior of the prefabricated metal part is a hollow chamber, and the hollow chamber is filled with EPS extruded polystyrene board.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) By adopting the prefabricated metal part, on the one hand, the prefabricated metal part can be prefabricated and manufactured according to the size of the parapet wall, and after being transported to the site, the coping can be quickly installed, without on-site construction and pouring of reinforced concrete, improving the construction efficiency. On the other hand, when the wall of the parapet wall cracks, the prefabricated metal part will not crack, avoiding leakage of rainwater and the like into the interior of the parapet wall and affecting the structural stability. At the same time, the prefabricated metal part can be clamped on the upper end of the parapet wall by using the card slot at the lower end of the prefabricated metal part, improving the overall structural stability of the parapet wall.

[0018] In this application, the lightning protection structure is arranged on the precast metal part. On the one hand, the installation of the lightning protection structure can be completed when installing the coping, which simplifies the operation steps. On the other hand, there is no need to directly install the lightning protection structure on the wall of the parapet, and there is no need to set structures such as seals between the lightning protection structure and the parapet wall, which simplifies the overall structure and reduces the possibility of leakage at the connection between the two.

[0019] (2) The precast metal part is designed in a split form, which reduces the processing difficulty on the one hand and the installation difficulty on the other hand, and can meet the requirements of temperature deformation at the same time.

[0020] (3) The use of the clamping block and the clamping groove facilitates the assembly of adjacent precast units.

[0021] (4) The top surface of the precast metal part is an inclined surface that slopes towards the inner side of the parapet, which is convenient for drainage, avoids the wall surface being polluted by water stains, and further damages the overall effect of the building facade.

[0022] (5) The use of the convex rib and the precast water stop plate can prevent rainwater from polluting the wall.

[0023] (6) The precast metal part is set as a hollow structure, which can reduce the weight and is convenient for installation. Filling the EPS extruded polystyrene board in the hollow chamber can be used as the support of the precast unit, and at the same time solve the problem of structural building heat bridge. Description of the Drawings

[0024] Figure 1 It is the overall schematic diagram of the coping of the parapet in Embodiment 1 of the present utility model.

[0025] Figure 2 It is the structural schematic diagram of the precast unit in Embodiment 1 of the present utility model.

[0026] Figure 3 It is the side sectional view of the coping of the parapet in Embodiment 1 of the present utility model.

[0027] Figure 4 It is the schematic diagram of the splicing and assembly of the coping of the parapet in Embodiment 1 of the present utility model.

[0028] In the figure: 1. Precast metal part; 2. EPS extruded polystyrene board; 3. First U-shaped block; 4. Second U-shaped block; 5. Precast water stop plate; 6. Embedded metal plate; 7. Lightning arrester precast part; 8. Reserved hole; 9. Lightning protection short needle; 10. Lightning protection belt; 11. Rubber sealing ring; 12. Anchor bolt; 13. Parapet; 14. Precast unit; 15. Unit metal plate; 16. Convex rib; 17. Rubber sealing strip; 18. Hollow chamber; 19. Card slot. Detailed Embodiment

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application: Specific Embodiment 1:

[0031] In this embodiment, as shown in Figure 1 and 3 , the horizontal direction is the length direction of the precast metal member 1, and the vertical direction is the width direction of the precast metal member 1.

[0032] Referring to Figures 1 to 4 , a precast assembled parapet coping (hereinafter referred to as the parapet coping) of the present utility model includes a precast metal member 1 extending along the horizontal direction. A card slot 19 for adapting to the wall body of the parapet 13 is arranged at the lower end of the precast metal member 1. The precast metal member 1 is used for being clamped and fixed at the upper end of the parapet 13. Specifically, the precast metal member 1 is an overall U-shaped structure with an opening downward, and the opening of the U-shaped structure forms the above-mentioned card slot 19. In actual use, the actual shape of the precast metal member 1 adapts to the shape of the parapet 13.

[0033] In this embodiment, the parapet coping further includes a lightning protection structure. The lightning protection structure includes a plurality of lightning protection short needles 9 arranged at equal intervals along the length direction of the precast metal member 1. The lower ends of the lightning protection short needles 9 vertically pass through the precast metal member 1 and are connected to the parapet 13. The connection between the lightning protection short needles 9 and the precast metal member 1 is sealed, and the upper ends of the lightning protection short needles 9 are connected by a lightning protection belt 10.

[0034] Preferably, in this embodiment, as shown in Figure 1 and 2 , the parapet coping further includes a pre-embedded metal plate 6. The pre-embedded metal plate 6 is used for being pre-embedded and fixed on the upper end surface of the parapet 13, and the length of the pre-embedded metal plate 6 adapts to the length of the precast metal member 1. The longitudinal width of the pre-embedded metal plate 6 adapts to the bottom surface of the card slot 19. The pre-embedded metal plate 6 is fixedly installed on the pre-embedded metal plate 6 through anchor bolts 12, so as to fixedly install the pre-embedded metal plate 6 on the wall body of the parapet 13.

[0035] Preferably, the lightning protection structure further includes a lightning receptor prefabricated part 7 fixed on the lower end surface of the pre-embedded metal plate 6. A plurality of lightning receptor prefabricated parts 7 are arranged at intervals along the length direction of the pre-embedded metal plate 6, and the number, position of the lightning receptor prefabricated parts 7, and the number and position of the lightning protection short needles 9 are adapted, so that a lightning receptor prefabricated part 7 is correspondingly arranged at the lower end of each lightning protection short needle 9. The lower end of the lightning protection short needle 9 sequentially passes through the precast metal member 1 and the pre-embedded metal plate 6 and is fixedly connected to the corresponding lightning receptor prefabricated part 7. The upper part of the lightning protection short needle 9 is connected to the lightning protection belt 10, and the lower part of the lightning protection short needle 9 is connected and fixed to the lightning receptor prefabricated part 7, forming a complete roof lightning protection system.

[0036] During actual installation, first, the lightning arrester prefabricated part 7 is welded to the lower end of the embedded metal plate 6 correspondingly. Then, during the construction of the parapet wall 13 on the flat roof, the assembly of the lightning arrester prefabricated part 7 and the embedded metal plate 6 is fixed in the binding steel bars in advance to complete the installation of the embedded metal plate 6 and the lightning arrester prefabricated part 7.

[0037] Preferably, as Figure 1 、 4 shown, in this embodiment, the prefabricated metal part 1 is designed in a split manner and is integrally formed by splicing a plurality of prefabricated units 14 along its length direction. And the adjacent prefabricated units 14 are in sealing fit with each other. The lightning protection short needles 9 correspond to the prefabricated units 14 one by one, that is, a lightning protection short needle 9 is provided on each prefabricated unit 14.

[0038] The embedded metal plate 6 is formed by splicing a plurality of unit metal plates 15 along its length direction. The unit metal plates 15 correspond to the prefabricated units 14 one by one. The length of the unit metal plate 15 is adapted to the length of the prefabricated unit 14, that is, one prefabricated unit 14 is fixedly installed on one unit metal plate 15. A lightning arrester prefabricated part 7 is fixedly installed at the position corresponding to the lightning protection short needle 9 on the lower end face of each unit metal plate 15. In this way, the entire parapet coping is designed in a split modular manner, which can reduce the processing and installation difficulty, is convenient for replacement in case of damage, and has high on-site installation efficiency, low labor cost, durability, long service life, flexible replacement, can reduce the construction and later maintenance costs, and can also meet the temperature deformation requirements at the same time.

[0039] Preferably, in this embodiment, clamping blocks and clamping grooves are respectively arranged at the transverse two ends of the prefabricated unit 14. The sizes of the clamping blocks and the clamping grooves are adapted to each other. The clamping blocks on the opposite sides of the adjacent prefabricated units 14 are used for being clamped in the corresponding clamping grooves and are in sealing fit with each other. By using the cooperation of the clamping blocks and the clamping grooves, on the one hand, it is convenient to realize the sealing between the two, and on the other hand, it is convenient to realize the assembly of the adjacent prefabricated units 14.

[0040] Specifically, as Figure 2 、 4 shown, a first U-shaped block 3 and a second U-shaped block 4 are respectively fixedly arranged at the transverse two ends of the prefabricated unit 14, and both the first U-shaped block 3 and the second U-shaped block 4 are clamped on the outside of the prefabricated unit 14.

[0041] Among them, the outer side surface of the first U-shaped block 3 is flush with the corresponding end surface of the prefabricated unit 14, and the inner side surface of the second U-shaped block 4 is flush with the corresponding end surface of the prefabricated unit 14, that is, as Figure 2 shown, the outer side surface of the first U-shaped block 3 is flush with the right end surface of the prefabricated unit 14, and the inner side surface of the second U-shaped block 4 is flush with the left end surface of the prefabricated unit 14.

[0042] The middle notch of the second U-shaped block 4 is adapted to the outer contour of the first U-shaped block 3, so that the whole of the second U-shaped block 4 extends outward away from the first U-shaped block 3. During actual assembly, the first U-shaped blocks 3 on the opposite sides of adjacent prefabricated units 14 can extend into the middle notch of the second U-shaped block 4. A suitable rubber sealing strip 17 is clamped between their adjacent sides, and they can be tightly engaged to achieve sealed assembly. The first U-shaped block 3 constitutes the above-mentioned clamping block, and the middle notch of the second U-shaped block 4 constitutes the above-mentioned clamping groove.

[0043] In this embodiment, preferably, the top surface of the prefabricated metal part 1 is an inclined surface that is inclined towards the inner side of the parapet wall 13. Specifically, the drainage slope of this inclined surface is 1%. This facilitates drainage, avoids water stains on the wall surface, and further damages the overall effect of the building facade.

[0044] Preferably, in this embodiment, as Figure 1 、 2 、shown in Figure 3, convex ribs 16 and prefabricated drip plates are respectively arranged on the longitudinal two sides of the prefabricated metal part 1. And one convex rib 16 and one prefabricated drip plate 5 are arranged on each side of each prefabricated unit 14. This diverts rainwater, avoids rainwater from hitting the parapet wall 13, prevents rainwater from polluting the wall, and protects the parapet wall 13. In this embodiment, the prefabricated drip plate 5 is arranged inside the prefabricated unit 14. In other embodiments, when the use requirements are met, the prefabricated drip plate 5 can also be arranged outside the prefabricated unit 14.

[0045] In this embodiment, preferably, the interior of the prefabricated metal part 1 is a hollow chamber 18, and the hollow chamber 18 is filled with EPS extruded polystyrene board 2. Specifically, as Figure 1 、 2 、shown in Figure 3, each prefabricated unit 14 is a box structure, and the hollow chamber 18 in each box structure is filled with EPS extruded polystyrene board 2. Utilizing the hollow chamber 18 can reduce the weight, facilitate installation, and reduce costs at the same time. Filling the EPS extruded polystyrene board 2 in the hollow chamber 18 can serve as a support for the prefabricated unit 14 and solve the structural building heat bridge problem at the same time. Of course, in other embodiments, when the actual use requirements are met, the prefabricated metal part 1 can also be a plate structure or a metal frame structure.

[0046] In this embodiment, as Figure 3 shown, holes are reserved at the positions corresponding to the installation of lightning protection short needles 9 on the upper and lower surfaces of the prefabricated metal part 1. The lower end of the lightning protection short needle 9 and the down conductor pass through the holes and are connected to the lightning arrester prefabricated part 7, and the upper end of the lightning protection short needle 9 exposes the upper hole and is connected to the lightning protection belt 10. A rubber sealing ring 11 is arranged at the contact position between the hole and the lightning protection short needle 9, which ensures sealing on the one hand and meets the temperature deformation requirements on the other hand.

[0047] In this embodiment, the prefabricated unit 14 is made of titanium-zinc plate with a thickness of 1 mm. Its two sides extend 80 mm downward to the lower part of the parapet wall 13 respectively, and chamfering treatment is performed at the ends. The upper end of the first U-shaped block 3 protrudes 120 mm from the prefabricated unit 14. The cross-sectional dimension of the lightning arrester prefabricated part 7 is 50x50 mm, the height of the lightning protection short needle 9 is 400 mm, the embedded metal plate 6 is made of steel plate with a thickness of 2 mm, its width is 120 mm, and the hole diameter is designed to be 3 mm.

[0048] The installation process of this application: First, in the factory, according to the size of the parapet wall 13, the corresponding prefabricated unit 14 and the unit metal plate 15 are prefabricated and processed. The lightning protection short needle 9 is inserted through each prefabricated unit 14, and the EPS extruded polystyrene board 2 is filled in the hollow chamber 18 of the prefabricated unit 14 to complete the processing of the prefabricated unit 14. A lightning arrester prefabricated part 7 is welded and fixed at the lower end of each unit metal plate 15 to complete the assembly of the two.

[0049] During the construction process of the parapet wall 13, the unit metal plates 15 are laid along the extension direction of the parapet wall 13, and the assembly of the lightning arrester prefabricated part 7 and the unit metal plate 15 is fixed in the binding steel bars to complete the installation of the two. At the same time, the anchor bolts 12 are buried at the corresponding positions, and the upper ends of the anchor bolts 12 pass through the unit metal plates 15.

[0050] The prefabricated units 14 are sequentially spliced along the extension direction of the parapet wall 13 on the parapet wall 13 to form the prefabricated metal part 1, and the prefabricated unit 14 is made to correspond to the unit metal plate 15. Then, the unit metal plate 15 is fixed on the unit metal plate 15 by using the anchor bolts 12, and the lower end of the lightning protection short needle 9 is fixed on the corresponding lightning arrester prefabricated part 7. When splicing the prefabricated units 14, the first U-shaped block 3 is engaged in the second U-shaped block 4 and sealed with the rubber sealing strip 17 to complete the installation of the prefabricated metal part 1. The lightning protection belts 10 are sequentially connected to the lightning protection short needles 9 to complete the installation of the entire parapet coping.

[0051] In summary, the parapet coping of the present utility model adopts the prefabricated metal part 1. On the one hand, the prefabricated metal part 1 can be prefabricated and manufactured according to the size of the parapet wall 13. After being transported to the site, the coping can be quickly installed without on-site construction of pouring reinforced concrete, improving the construction efficiency. On the other hand, when the wall of the parapet wall 13 cracks, the prefabricated metal part 1 will not crack, avoiding rainwater and the like from leaking into the interior of the parapet wall 13 and affecting the structural stability. At the same time, the prefabricated metal part 1 can be clamped on the upper end of the parapet wall 13 by using the card slot 19 at the lower end of the prefabricated metal part 1, improving the overall structural stability of the parapet wall 13.

[0052] Meanwhile, in the present application, the lightning protection structure is arranged on the prefabricated metal part 1. On the one hand, the installation of the lightning protection structure can be completed when installing the coping, which simplifies the operation steps. On the other hand, it is not necessary to directly install the lightning protection structure on the wall of the parapet 13, and there is no need to set up structures such as seals between the lightning protection structure and the wall of the parapet 13, which simplifies the overall structure and reduces the possibility of leakage at the connection between the two.

[0053] Embodiment 2: This embodiment provides a different coping for the parapet. Different from Embodiment 1, in this embodiment, when meeting the actual use requirements, the embedded metal plate can be designed as an integral structure that adapts to the parapet structure. Before installation, a card slot adapted to the embedded metal plate should be reserved at the upper end of the parapet for the integral clamping of the embedded metal plate at the upper end of the parapet.

[0054] Embodiment 3: This embodiment provides a different coping for the parapet. Different from Embodiment 1, in this embodiment, when meeting the actual use requirements, the embedded metal plate can be not set. At this time, bolt assemblies are embedded at the upper end of the parapet, and the prefabricated metal part is fixedly installed through the bolt assemblies.

[0055] Embodiment 4: This embodiment provides a different coping for the parapet. Different from Embodiment 1, in this embodiment, when meeting the actual use requirements, the clamping block can be a stepped structure cut circumferentially along the peripheral surface at one end of the prefabricated unit, and the clamping groove can be a groove structure provided at the other end of the prefabricated unit and adapted to the clamping block.

[0056] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

[0057] In the description of the embodiments of the present application, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use, it is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0058] In addition, when the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined.

Claims

1. A prefabricated parapet top, characterized in that: It includes a prefabricated metal part extending in the transverse direction, and the lower end of the prefabricated metal part is provided with a slot for adapting to the wall of the parapet. The prefabricated metal part is used to be clamped and fixed to the upper end of the parapet. It also includes a lightning protection structure, which includes a plurality of lightning rods arranged at equal intervals along the length direction of the prefabricated metal part, the lower ends of the lightning rods vertically pass through the prefabricated metal part and are connected to the parapet, the connection between the lightning rod and the prefabricated metal part is sealed, and the upper ends of the lightning rods are connected by lightning strips.

2. The prefabricated parapet top according to claim 1 is characterized in that: The prefabricated metal part is formed by splicing a plurality of prefabricated units along the length direction thereof, the adjacent prefabricated units are sealed and matched, and the lightning rods correspond to the prefabricated units one by one.

3. The prefabricated parapet top according to claim 2 is characterized in that: It also includes an embedded metal plate, the size of which is used to adapt to the bottom surface of the slot, and the embedded metal plate is used to be embedded and fixed on the upper end of the parapet, and the prefabricated metal part is fixedly connected to the embedded metal plate.

4. The prefabricated parapet top according to claim 3 is characterized in that: The embedded metal plate is formed by splicing a plurality of unit metal plates along the length direction thereof, and the unit metal plates correspond to the prefabricated units one by one.

5. The prefabricated parapet capping according to claim 3 is characterized in that: The lightning protection structure also includes a lightning rod prefabricated part fixed on the lower end surface of the embedded metal plate. The number and position of the lightning rod prefabricated parts are adapted to the number and position of the lightning rods. The lower end of the lightning rod is used to be fixedly connected to the corresponding lightning rod prefabricated part.

6. The prefabricated parapet capping according to claim 2 is characterized in that: The lateral ends of the prefabricated unit are respectively provided with a clamping block and a clamping groove, the sizes of the clamping block and the clamping groove are adapted, the clamping blocks on the opposite sides of adjacent prefabricated units are used to clamp in the corresponding clamping groove, and the two are sealed and matched.

7. The prefabricated parapet capping according to claim 6 is characterized in that: The first U-shaped block and the second U-shaped block are respectively clamped and fixed at the two lateral ends of the prefabricated unit, the outer side surface of the first U-shaped block is flush with the corresponding end surface of the prefabricated unit, the inner side surface of the second U-shaped block is arranged flush with the corresponding end surface of the prefabricated unit, and the middle notch of the second U-shaped block is adapted to the outer contour of the first U-shaped block, the first U-shaped block constitutes the clamping block, and the middle notch of the second U-shaped block constitutes the clamping groove.

8. The prefabricated parapet capping according to claim 1 is characterized in that: The top surface of the prefabricated metal member is an inclined surface for inclining toward the inner side of the parapet.

9. The prefabricated parapet capping according to claim 1 is characterized in that: The longitudinal sides of the prefabricated metal part are respectively provided with convex ribs and prefabricated water-repellent plates.

10. The prefabricated parapet capping according to claim 1, characterized in that: The interior of the prefabricated metal part is a hollow chamber, and the hollow chamber is filled with EPS extruded polystyrene board.

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