Prefabricated concrete hollow wall structure

Abstract

The utility model provides a prefabricated concrete hollow wall structure which comprises an A-face leaf wall plate, pulling pieces, an A-face leaf wall corrugated plate, a core mold, a B-face leaf wall corrugated plate and a B-face leaf wall plate. The A-face leaf wall plate and the B-face leaf wall plate are arranged in parallel and connected through the multiple pulling pieces. The A-face leaf wall corrugated plate is connected to the inner side face of the A-face leaf wall plate, and the B-face leaf wall corrugated plate is connected to the inner side face of the B-face leaf wall plate. The core mold is arranged in a wall body cavity between the A-face leaf wall corrugated plate and the B-face leaf wall corrugated plate. The A-face leaf wall and the B-face leaf wall are connected through a tying piece; corrugated plates are used for replacing manual galling, roughening treatment of the inner sides of the A and B face leaf wallboards is achieved, and the binding power and the co-working capacity between new concrete and old concrete are enhanced; the detachable core mold is additionally arranged to support the A-face leaf wall plate and the B-face leaf wall plate, temporary support and cavity forming are provided for the concrete structure through the detachable core mold, and the accuracy of the structural shape is ensured.

Description

Technical Field

[0001] This application belongs to the field of prefabricated building engineering technology, and in particular relates to a precast concrete hollow wall structure. Background Technology

[0002] As the construction industry increasingly demands higher standards for building energy efficiency and environmental performance, prefabricated buildings are gradually being widely applied in various construction projects. Precast concrete hollow walls are commonly used vertical precast components in prefabricated building projects. They consist of inner and outer wall panels and a cavity, prefabricated in a factory, transported to the construction site, with connecting steel bars placed inside the cavity and concrete poured in. This ensures the wall structure is fully connected vertically and horizontally, forming the building's vertical load-bearing system. Due to its convenient connection method, it is becoming increasingly popular in the prefabricated building industry.

[0003] Existing precast concrete hollow wall structures and production processes include inverted and stacked hollow walls. The inverted and stacked hollow wall structure and process have the following drawbacks: It requires specialized large equipment for a 180° inversion, where the pre-formed A-side wall is stably fixed and then inverted 180° into the still-uncured B-side wall concrete. This inverted and stacked process is cumbersome: forming, roughening, primary curing, primary demolding, inverting and stacking, secondary roughening, secondary curing, and secondary demolding. At least one side of the cavity cannot be roughened, affecting structural safety, because the concrete needs to be vibrated and compacted after the two wall panels are joined, at which point a roughened surface cannot be created, and the concrete poured into the cavity is prone to delamination. The tie-bar system is complex; the tie-bars in the wall do not bear structural loads but are only required by the process, and they must be arranged very densely, otherwise forming accuracy is difficult to guarantee, and it is also very easy to cause bulging during pouring. At the same time, many tie-bars in the cavity are ineffective reinforcement, merely a process requirement, resulting in significant material waste. Furthermore, since the tensile strength of the two-leaf wall panels is determined by the insertion depth, and the aggregates such as sand and gravel in the concrete affect the insertion depth, the inverted insertion depth is uncertain, resulting in uneven wall thickness. This leads to easy bulging of the formwork during secondary pouring, making it difficult to control the forming accuracy. The AB leaf wall cannot have reinforcing bars on its sides, affecting the structural strength of the wall. Secondary curing is required, resulting in high energy consumption and low efficiency. The alignment accuracy of the assembled hollow wall is high and difficult to guarantee; the manufacturing process is complex, not a one-time molding, requiring a large site area, and consuming high energy. Many holes on the outer leaf panel surface need to be sealed, making the process complex and prone to water seepage. The outer leaf wall operation requires additional scaffolding, increasing project costs. Utility Model Content

[0004] To address the aforementioned issues, this application proposes a precast concrete hollow wall structure to overcome the shortcomings of existing structural forms and production processes.

[0005] To achieve the objectives of this application, the following technical solution is provided:

[0006] In a first aspect of this application, a precast concrete hollow wall structure is provided, comprising: an A-side wall panel, tie members, an A-side wall corrugated plate, a core mold, a B-side wall corrugated plate, and a B-side wall panel, wherein the A-side wall panel and the B-side wall panel are arranged parallel to each other and connected by a plurality of tie members; the A-side wall corrugated plate is connected to the inner side of the A-side wall panel, and the B-side wall corrugated plate is connected to the inner side of the B-side wall panel; the core mold is disposed in the wall cavity between the A-side wall corrugated plate and the B-side wall corrugated plate.

[0007] In one possible embodiment, the A-side leaf wall corrugated plate includes: a first plate bottom, a first plate top, and a first inclined vertical plate, wherein the first plate bottom is connected to the bottom mold of the core mold; the first plate top is connected to the inner side of the A-side leaf wall plate; and the first inclined vertical plate connects the first plate bottom and the first plate top to make the first plate bottom and the first plate top form a horizontal groove distribution.

[0008] In one possible embodiment, the B-side leaf wall corrugated plate includes: a second plate bottom, a second plate top, and a second inclined plate, wherein the second plate bottom is connected to the top mold of the core mold; the second plate top is connected to the inner side of the B-side leaf wall plate; and the second inclined plate connects the second plate bottom and the second plate top to form a grooved distribution between the second plate bottom and the second plate top.

[0009] In one possible embodiment, the core mold includes: a bottom mold, a top mold, and a support, wherein the bottom mold is connected to the corrugated plate of the A-side blade wall; the top mold is connected to the corrugated plate of the B-side blade wall and is used to support the corrugated plate of the B-side blade wall; the support is a telescopic support and is used to connect the bottom mold and the top mold.

[0010] In one possible embodiment, the tie member is disposed between the A-side leaf wall panel and the B-side leaf wall panel, and the tie member passes sequentially through the A-side leaf wall corrugated plate, the core mold, and the B-side leaf wall corrugated plate to connect the A-side leaf wall panel and the B-side leaf wall panel.

[0011] In one possible embodiment, the tie member is an I-shaped structure, with its lower flange disposed within the A-side leaf wall panel, its upper flange disposed within the B-side leaf wall panel, and the upright plate disposed between the core molds.

[0012] In one possible embodiment, it further includes: a reinforcing mesh for the A-side blade wall panel and a reinforcing mesh for the B-side blade wall panel, wherein the reinforcing mesh for the A-side blade wall panel is disposed within the A-side blade wall panel; and the reinforcing mesh for the B-side blade wall panel is disposed within the B-side blade wall panel.

[0013] In one possible embodiment, the reinforcing steel mesh of the A-side leaf wall panel is parallel to the reinforcing steel mesh of the B-side leaf wall panel.

[0014] The beneficial effects of the embodiments of this application are as follows:

[0015] This application provides a simple, convenient, flexible, and one-time molding precast hollow concrete wall structure. By inserting tie members before pouring concrete, the depth of the tie members penetrating the AB leaf wall concrete can be controlled. Furthermore, by casting the tie members and the wall concrete together, cracking during concrete pouring is less likely, and bulging is avoided. After the wall is formed, the overall precision of the wall is high, making the building more aesthetically pleasing. Corrugated plates replace manual roughening to achieve roughening of the inner side of the AB leaf wall panels. The corrugated plates form keyways on the inner wall of the concrete wall panel cavity, improving the shear slip resistance of the new and old concrete, enhancing the bond and working capacity between them, thereby improving the overall integrity, load-bearing capacity, and safety of the structure. The addition of a detachable core mold, with its retractable support, reduces the resistance to core removal, solving the problem of easy damage to the hollow concrete wall panels during demolding, ensuring the accuracy of the structural shape, improving construction efficiency, and reducing unnecessary resource waste and post-construction finishing work. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 A structural schematic diagram of a precast concrete hollow wall provided in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of a corrugated plate provided in an embodiment of this application;

[0019] Figure 3 A schematic diagram of the structure of a core mold provided in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of a type I tie member provided in an embodiment of this application.

[0021] Reference numerals: 1-A-face leaf wall panel, 2-tie member, 21-lower flange, 22-upper flange, 23-vertical plate, 24-cut seam, 3-A-face leaf wall corrugated plate, 31-bottom of the first plate, 32-top of the first plate, 33-first inclined vertical plate, 4-core mold, 41-bottom mold, 42-top mold, 43-support, 5-B-face leaf wall corrugated plate, 51-bottom of the second plate, 52-top of the second plate, 53-second inclined vertical plate, 6-B-face leaf wall panel, 7-A-face leaf wall panel reinforcing mesh, 8-B-face leaf wall panel reinforcing mesh, 9-wall cavity. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this application, unless otherwise stated, "multiple" means two or more.

[0024] like Figure 1 As shown in the figure, this application provides a precast concrete hollow wall structure, characterized in that it includes an A-side leaf wall panel 1, tie members 2, an A-side leaf wall corrugated plate 3, a core mold 4, a B-side leaf wall corrugated plate 5, and a B-side leaf wall panel 6, wherein the A-side leaf wall panel 1 and the B-side leaf wall panel 6 are arranged in parallel and connected by a plurality of tie members 2; the A-side leaf wall corrugated plate 3 is connected to the inner side of the A-side leaf wall panel 1, and the B-side leaf wall corrugated plate 5 is connected to the inner side of the B-side leaf wall panel 6; the core mold 4 is disposed in the wall cavity between the A-side leaf wall corrugated plate 3 and the B-side leaf wall corrugated plate 5.

[0025] In this embodiment, the A-side blade wall panel and the B-side blade wall panel are arranged in parallel, the A-side blade wall corrugated plate and the B-side blade wall corrugated plate are placed in parallel, the core mold is placed horizontally between the A-side and B-side blade wall corrugated plates, and the tie member passes through the two core molds to connect the A-side blade wall panel and the B-side blade wall panel.

[0026] It is understood that the concrete hollow wall structure mentioned in the embodiments of this application is a rectangular hollow wall structure.

[0027] like Figure 2As shown in the embodiment of this application, a corrugated plate structure is provided, including an A-side blade wall corrugated plate and a B-side blade wall corrugated plate. The A-side blade wall corrugated plate 3 includes: a first plate bottom 31, a first plate top 32, and a first inclined vertical plate 33, wherein the first plate bottom 31 is connected to the bottom mold 41 of the core mold 4; the first plate top 32 is connected to the inner side of the A-side blade wall plate 1; the first inclined vertical plate 33 connects the first plate bottom 31 and the first plate top 32, so that the first plate bottom 31 and the first plate top 32 are distributed in a horizontal groove.

[0028] Furthermore, the B-side leaf wall corrugated plate 5 includes: a second plate bottom 51, a second plate top 52, and a second inclined vertical plate 53, wherein the second plate bottom 51 is connected to the top mold 41 of the core mold 4; the second plate top 52 is connected to the inner side of the B-side leaf wall plate 6; and the second inclined vertical plate 53 connects the second plate bottom 51 and the second plate top 53 to make the second plate bottom 51 and the second plate top 52 form a groove distribution.

[0029] Specifically, the A-side blade wall corrugated plate and the B-side blade wall corrugated plate are metal corrugated plates with staggered convex teeth formed by rolling thin-walled metal plates. The cross-section is trapezoidal, and the top of the corrugated plate has longitudinal convex teeth. These convex teeth are set along the top of the corrugated plate at a certain interval. The bottom of the plate is horizontal. The corrugated plate can provide a more uniform surface structure, avoid the surface unevenness that may be caused by manual roughening, and the corrugated design can effectively increase the friction between the contact surfaces, thereby ensuring that the core mold can be placed stably.

[0030] In this embodiment, the angle at the connection between the bottom of the plate and the inclined plate is confirmed by design, and the angle at the connection between the top of the plate and the inclined plate is confirmed by design, so that the wave height between the bottom of the plate and the top of the plate reaches the design height, and the wave crest spacing of the corrugated plate is also determined according to the design requirements.

[0031] Understandably, since the concrete in the reserved cavity is poured on-site, the inner wall of the cavity must be strictly roughened according to the design requirements before the product leaves the factory. This is commonly known as "roughening," meaning that the inner wall of the cavity must be fully roughened so that the precast inner and outer walls can be integrated with the cast-in-place concrete. At least one side of the wall cavity cannot be roughened, as this would affect structural safety. This is because the concrete still needs to be vibrated and compacted after the two wall panels are joined, at which point it is impossible to make a roughened surface. The concrete poured into the cavity afterward is prone to delamination. This application uses corrugated plates on the A-side and B-side leaf walls to roughen the inner surfaces of the A-side and B-side leaf walls, eliminating the need for manual roughening. This ensures that the concrete surface has sufficient roughness and does not affect the placement of the core mold in this embodiment.

[0032] like Figure 3As shown in the embodiment of this application, a core mold structure includes: a bottom mold 41, a top mold 42, and a support 43. The bottom mold 41 is connected to the A-side blade wall corrugated plate 3; the top mold 42 is connected to the B-side blade wall corrugated plate 5 and is used to support the B-side blade wall corrugated plate 5; the support 43 is a telescopic support and is used to connect the bottom mold 41 and the top mold 42.

[0033] Specifically, the material of the mandrel needs to have certain strength and durability, while also ensuring easy removal after disassembly. It can be made of high-strength material, such as metal or plastic, and has corresponding tensile and shear strength. The mandrels are arranged in close contact with the vertical plate of the tie-fitting component and along the length of the wall, with the distance between the mandrels being the thickness of the vertical plate of the tie-fitting component.

[0034] In this embodiment, the bottom mold of the core mold contacts the inner corrugated plate of the A-side leaf wall, and the top mold contacts the inner corrugated plate of the B-side leaf wall. The thickness of the wall cavity is determined by the set height of the telescopic support. When casting the hollow wall, the height of the core mold support is adjusted. When demolding, the height of the support is contracted to demold the upper and lower leaf walls, thus achieving a hollow wall with different wall cavity thicknesses.

[0035] Understandably, the design of the cavity thickness for hollow walls differs in residential, office, and industrial buildings. The design thickness of the hollow wall cavity needs to comprehensively consider various factors such as structural strength, sound and heat insulation performance, building functional requirements, economy, and construction costs. The core mold provides support for the concrete during the wall pouring process, ensuring that the concrete solidifies in the correct position and shape. By adjusting the height of the core mold, the required hollow internal space can be maintained during pouring, thus precisely controlling the wall thickness. Furthermore, the core mold is usually removed after the wall has formed, so it does not affect the overall strength and performance of the wall. After demolding, the core mold can be reused, reducing material waste.

[0036] What is even more incomprehensible is that the combined use of core molds and corrugated plates not only ensures the rough treatment of the inner cavity of the wall and easy demolding, but also ensures the stable curing of the concrete shape, because compared with supporting the corrugated plates by columns, core molds provide more stable support for the corrugated plates.

[0037] like Figure 4 As shown in the embodiment of this application, an I-type tie member structure is provided, including a lower flange 21, an upper flange 22, and a vertical plate 23. The lower flange 21 is disposed within the A-side leaf wall plate 1, the upper flange 22 is disposed within the B-side leaf wall plate 6, and the vertical plate 23 is disposed between the core molds 4.

[0038] Specifically, the Type I tie rod is made of high-strength steel plate, with 24 slits cut in the middle of the upper and lower ends of the steel plate, and the upper and lower flanges are formed by bending 90° to the left and right.

[0039] In this embodiment, the type I tie member is used to connect the A-side leaf wall and the B-side leaf wall. The tie member is inserted first, and then the concrete is poured. This can control the depth of the tie member penetrating the concrete of the A and B leaf walls. Furthermore, by pouring the tie member together with the wall concrete, the concrete is less prone to cracking and bulging during pouring. After the wall is formed, the overall precision of the wall is high, making the overall building more aesthetically pleasing.

[0040] Understandably, the design height of the tie rod is less than the height of the hollow wall, that is, less than the sum of the design thickness of the A-side leaf wall, the wall cavity thickness, and the A-side leaf wall thickness. The height and spacing of the tie rod are set according to design requirements. Based on the thickness of the hollow wall to be cast and the selected core mold size, the Type I tie rod can be customized according to actual needs to adapt to structures of different sizes, thereby achieving flexible installation and adjustment. This adaptability allows the tie rod to be used in various construction environments, exhibiting high versatility.

[0041] The embodiments of this application also include a reinforcing steel mesh 7 for the A-side leaf wall panel and a reinforcing steel mesh 8 for the B-side leaf wall panel, wherein the reinforcing steel mesh 7 for the A-side leaf wall panel is disposed within the A-side leaf wall panel 1; and the reinforcing steel mesh 8 for the B-side leaf wall panel is disposed within the B-side leaf wall panel 6.

[0042] Furthermore, the reinforcing steel mesh 7 of the A-side leaf wall panel and the reinforcing steel mesh 8 of the B-side leaf wall panel are parallel to each other.

[0043] In this embodiment, the reinforcing steel mesh of the A-side leaf wall panel is cast into the A-side leaf wall panel using traditional technology, and the reinforcing steel mesh of the B-side leaf wall panel is firmly connected to the reinforcing steel mesh of the A-side leaf wall panel using traditional technology through tie-fitting components to form an integral reinforcing steel skeleton.

[0044] Based on the above embodiments, another embodiment of the present invention provides a construction process for a precast concrete hollow wall structure as described in any of the above embodiments, the construction process including the following steps:

[0045] S1 Preparation of A-side leaf wall panel: Erect A-side leaf wall formwork; Lay A-side leaf wall steel mesh; Place tie rods vertically; Lay A-side corrugated plate, laying horizontally in sections, bypassing the tie rods; Pour concrete to the design height;

[0046] Specifically, the length of the tie member can be designed according to requirements, thus ensuring the depth to which the tie member penetrates the concrete.

[0047] S2 Core Mold Installation: Place the core mold on both sides of the tie member and ensure it is flush with the tie member; support the core mold to the designed height; seal the gaps between the core molds;

[0048] Specifically, the core molds are placed alternately on both sides of the tie member. The core molds are placed according to the tie member. The corrugated plate is very thin, and the gap on the upper plate of the core mold is the thickness of the corrugated plate. In order to ensure that the concrete pouring does not leak, this gap can be sealed with tape.

[0049] S3 Preparation of B-side leaf wall panel: Erect B-side leaf wall formwork; Lay B-side corrugated plate; Lay B-side leaf wall steel mesh; Pour concrete to the design height;

[0050] S4 overall maintenance and shaping;

[0051] S5 AB surface leaf wall panel side demolding.

[0052] In this embodiment, the A-side and B-side leaf wall panels are connected by tie rods, and the wall is gradually formed after the concrete is poured. For example, the tie rods are placed vertically, and the core mold is installed immediately after the A-side leaf wall concrete is poured, ensuring that the concrete can continue to solidify and form after initial setting. This highly continuous operation can improve construction efficiency and shorten the production cycle. This process, through the reasonable design of the installation sequence of the core mold and corrugated plate, allows the entire pouring process to be completed in a small construction space, while ensuring the predetermined shape and size of the wall. By reserving space for pouring and vibration through the installation of the corrugated plate, it can be ensured that the concrete is evenly filled and compacted throughout the hollow wall, reducing the occurrence of voids and cracks.

[0053] This application provides a simple, convenient, flexible, and one-time molding precast concrete hollow wall structure and construction process. By inserting tie members before pouring concrete, the depth of the tie members penetrating the A and B leaf wall concrete can be controlled. Furthermore, by casting the tie members together with the wall concrete, cracking during concrete pouring is less likely, and formwork bulging is avoided. After wall molding, the overall wall has high precision, making the building more aesthetically pleasing. Using corrugated plates instead of manual roughening achieves roughening of the inner sides of the A and B leaf wall panels, enhancing the bond and working ability between the new and old concrete, thereby improving the overall integrity, load-bearing capacity, and safety of the structure. Adding a removable core mold to support the A and B leaf wall panels provides temporary support and cavity formation for the concrete structure, ensuring structural shape accuracy, improving construction efficiency, and reducing unnecessary resource waste and post-construction finishing work.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0055] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. This application is not limited to the exact structures described above and illustrated in the accompanying drawings, and it should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, various changes and modifications made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. A precast concrete hollow wall structure, characterized in that, include: A-side leaf wall panel (1), tie rod (2), A-side leaf wall corrugated plate (3), core mold (4), B-side leaf wall corrugated plate (5), B-side leaf wall panel (6), wherein the A-side leaf wall panel (1) and the B-side leaf wall panel (6) are arranged in parallel and connected by multiple tie rods (2); the A-side leaf wall corrugated plate (3) is connected to the inner side of the A-side leaf wall panel (1), and the B-side leaf wall corrugated plate (5) is connected to the inner side of the B-side leaf wall panel (6); the core mold (4) is disposed in the wall cavity (9) between the A-side leaf wall corrugated plate (3) and the B-side leaf wall corrugated plate (5).

2. The precast concrete hollow wall structure according to claim 1, characterized in that, The A-side leaf wall corrugated plate (3) includes: a first plate bottom (31), a first plate top (32), and a first inclined plate (33), wherein the first plate bottom (31) is connected to the bottom mold (41) of the core mold (4); the first plate top (32) is connected to the inner side of the A-side leaf wall plate (1); the first inclined plate (33) connects the first plate bottom (31) and the first plate top (32) to make the first plate bottom (31) and the first plate top (32) form a horizontal groove distribution.

3. The precast concrete hollow wall structure according to claim 1, characterized in that, The B-side leaf wall corrugated plate (5) includes: a second plate bottom (51), a second plate top (52), and a second inclined plate (53), wherein the second plate bottom (51) is connected to the top mold (42) of the core mold (4); the second plate top (52) is connected to the inner side of the B-side leaf wall plate (6); the second inclined plate (53) connects the second plate bottom (51) and the second plate top (52) to make the second plate bottom (51) and the second plate top (52) form a groove distribution.

4. The precast concrete hollow wall structure according to claim 1, characterized in that, The core mold (4) includes: a bottom mold (41), a top mold (42), and a support (43). The bottom mold (41) is connected to the corrugated plate (3) of the A-side blade wall; the top mold (42) is connected to the corrugated plate (5) of the B-side blade wall and is used to support the corrugated plate (5) of the B-side blade wall; the support (43) is a telescopic support and is used to connect the bottom mold (41) and the top mold (42).

5. The precast concrete hollow wall structure according to claim 1, characterized in that, The tie member (2) is disposed between the A-side leaf wall plate (1) and the B-side leaf wall plate (6). The tie member (2) passes through the A-side leaf wall corrugated plate (3), the core mold (4), and the B-side leaf wall corrugated plate (5) in sequence to connect the A-side leaf wall plate (1) and the B-side leaf wall plate (6).

6. The precast concrete hollow wall structure according to claim 5, characterized in that, The tie member (2) has an I-shaped structure, with its lower flange (21) located inside the A-side leaf wall plate (1), its upper flange (22) located inside the B-side leaf wall plate (6), and its upright plate (23) located between the core molds (4).

7. The precast concrete hollow wall structure according to claim 1, characterized in that, Also includes: A-side leaf wall panel reinforcing mesh (7) and B-side leaf wall panel reinforcing mesh (8), wherein the A-side leaf wall panel reinforcing mesh (7) is disposed inside the A-side leaf wall panel (1); and the B-side leaf wall panel reinforcing mesh (8) is disposed inside the B-side leaf wall panel (6).

8. The precast concrete hollow wall structure according to claim 7, characterized in that, The reinforcing mesh (7) of the A-side leaf wall panel is parallel to the reinforcing mesh (8) of the B-side leaf wall panel.

Images