KR20070101822A - Contained load transfer device for wood sheathing products - Google Patents

Abstract

A contained load transfer device for wood sheathing products is provided to connect wood boards reliably during the construction of a roof with wood boards by increasing load bearing capacity. A contained load transfer device for wood sheathing products is provided for letting a user install a load transfer device in target wood boards easily and connecting an adjacent wood board to the target wood boards easily to keep wood boards in place for a sufficient period of time before attaching the wood boards to a wall or roof frame, and inserted to cavities(12,14) formed on peripheral edges(13,15) of two adjacent wood boards(16,18) to be in contact with the inside of the cavities to make clear the distance between two wood boards and to provide sufficient load bearing capacity for the whole construction which the connected wood boards are used for, wherein the distance between wood boards is sealed up tightly by attaching a tape on top portions(20,22) of the two wood boards and provided for allowing contraction or expansion caused by variations of moisture and temperature.

Description

Self-contained load transfer device for wooden cover products {CONTAINED LOAD TRANSFER DEVICE FOR WOOD SHEATHING PRODUCTS}

1 is a cross-sectional view of an elliptical disk inserted into a cavity of the perimeter of an adjacent wood board.

2 is a cross-sectional view of an elliptical disk with increased surface area.

3 is a sectional view of a rectangular disk having an increased surface area.

4 is a cross-sectional view of a rectangular disk provided with a pin at an intermediate point and inserted into a cavity of two wood boards, each cavity having flares to facilitate insertion of the disk during use;

<Explanation of symbols for main parts of the drawings>

10, 28: disk

12, 14, 44, 46: cavity

13, 15, 48, 50: periphery

16, 18: wooden board

20, 22: upper part

30: pin

36, 38: flare part

The present invention relates to the use of a special load transfer device for the purpose of reliably connecting and attaching composite wood boards during building construction using composite wood boards. Such a load transmitting device is configured to be cut in the periphery of the composite wood board and held in a slot cut in the composite wood board in a shape complementary to the shape of the load transmitting device itself. In this way, the load transfer device, when introduced into a slot of a suitable shape, not only allows the separation of adjacent wood boards which are subsequently attached to the frame of the target building, but also furthermore so that the connected wood boards are used (such as roofs or the like). ) Provide sufficient load bearing strength for the whole building. Thus, the spacing of wooden boards not only allows for adequate sealing between these wooden boards (with tape, sealant or other similar material), but must also be taken into account during the life of the building (to allow for expansion if necessary). Provide adequate spacing for contraction or expansion (due to moisture changes). Thus, if the load bearing strength can be increased in this way, it is possible to increase (in terms of number and weight) of building materials supported and maintained on the structure during construction. Building manufacturing methods using the load transfer device between wooden boards are also included within the scope of the present invention.

Composite wood boards such as plywood or oriented strand boards are well known in the building industry. In practice, these boards are used to make sloped roofs. To facilitate the manufacture of sloping roofs, board makers sell rectangular boards that are approximately 4 feet wide, 8 feet long and approximately 3/8 to 3/4 inch thick. These boards are usually not attached to the roof frame and each board abuts another board. Spacing is required to compensate for the possibility that expansion will occur due to changes in moisture content over the life of the roof itself. Accordingly, a method of sealing between the gaps of the boards constituting the roof is required. This is usually accomplished by tape or any other similar material. The tape is attached across the gap to the end of the adjacent board.

In addition, what is needed for the roof structure and the boards constituting the roof structure is that the weight of the worker on the roof during construction and the excess weight due to the material added during the construction project (in addition to the total weight of the worker carrying the material on the roof) Have the ability to withstand. A further need is to ensure that the boards that make up the roof structure remain in place for a time sufficient to permanently attach to the underlying roof frame.

In order to be able to derive these results, some devices in the form of clips which contact the outer edges of adjacent boards (both on the top and bottom of adjacent boards) have been used. However, such clips, known in the art as H-clips, have the disadvantage of being in a very undesirable state for the aforementioned uses. For example, since the H-clip is attached to the outside of the board, it is particularly suitable for sealing the seam along the gap between the boards connected by the clip (especially for the ingress of water into the seam and air leakage). ) Makes it difficult to attach the adhesive tape. Thus, the adhesive tape attached to the board must be in contact with the board as well as the clip, which reduces the potential adhesion to the board to some extent and reduces the effectiveness of the tape (or similar adhesive material). In addition, it was problematic to apply a predetermined load force to the roof structure comprising the H-clip, especially during the manufacture of the roof structure, so that the clip is subjected to an excessive load on a predetermined portion of the component board. Tend to separate. Thus, while eliminating the use of the H-clip in the aforementioned applications, it still allows for effective connection between adjacent boards while building the roof, and at the same time without losing the effectiveness of the adhesive material. There is a desire to provide a practical way of enabling the attachment of materials to adjacent boards. So far, the roofing industry of wood boards has not responded to these improvements.

An advantage of the present invention is that it provides a simple way to reliably connect these wooden boards during the construction of the roof with the wooden boards that make up the building roof. Another advantage of such an apparatus and method is that the user can easily install the apparatus within the target wooden board, furthermore keeping the wooden board in place for a sufficient time prior to attachment to the roof frame. It is easy to connect adjacent wood boards to target wood boards.

In the present specification, the present invention can be summarized as a structure for a building selected from the group consisting of a roof and a wall, the structure comprising at least a first wood board and a second wood board, the first wood board and the second wood board. The boards each have a top portion and a bottom portion, each having four perimeters, at least one perimeter of each wood board is provided with at least one cavity for the insertion of at least one connecting device. Is made of durable material and has a first end and a second end, each of which is configured to be inserted into the at least one cavity of each wood board; When the first wood board and the second wood board are in contact with the connecting device, the peripheral portions into which the connecting device is inserted are not in contact with each other but are parallel to each other, and the connecting device is connected to the first wood board and the second wood board. It does not touch the top or bottom part of the wood board. Further, limitations to the roof or wall structure as described above include, for example, that the first end and the second end have exactly the same shape and dimensions, and the connection device is any of the first end or the second end. One configured in such a way that it can be arranged in the at least one cavity provided in the periphery of the first wood board, the cavity having a shape and dimensions complementary to the first or second end of the connecting device. Having a connecting device in the cavity of the first wood board, the second wood board is in contact with the second end of the connecting device, and is in a cavity in the periphery of the second wood board. Is the same type as the cavity formed for the first wood board. Roof manufacturing methods according to this configuration and using at least two of said wood boards for the purposes described above are also included within the scope of the invention.

Thus, the connection device is preferably symmetrical in shape and dimension so as to qualify as necessary to be inserted into the cavity of any wood board used with the connection device. The width dimension of the connecting device is less than or equal to the length of the periphery of the target wood board (s) and is usually less than 1½ inches (ie about 3.8 centimeters). Since the typical length of the gap between the roof joists for the roofing timber board is about 24 inches (ie about 61 centimeters) from the center, the length of the connection device can be 22.5 inches (about 57 centimeters). The minimum width of the connection device is about 1 inch (2.54 centimeters). While it is desirable to join adjacent boards using a plurality of connecting devices during the construction of the roof or wall, this is not necessary. Primarily, due to ease of maneuvering, the user will have a smaller device in hand than a large material for the joining application during roof construction.

For this reason, the connecting device may be included in a roll including a release liner connecting the plurality of connecting devices with an adhesive, and the connecting device may be detached from the roll and attached to the cavity of the wooden board. Moved with the connecting device, the connecting device can be reliably attached to the target wood board. In this way, the user will have a relatively convenient and safe way not only to carry the plurality of connecting devices, but also to attach the connecting device including the adhesive to the target wood board.

It may also be desirable to use an adhesive when the user carries the connection device (s) by other means. Thus, the user may apply the adhesive by hand before use, or the connecting device may be provided with a cover strip on the adhesive area which has already been applied, before the user and before inserting into the wood board cavity. Strips can be removed from the area. In addition, any other manner of adhesive application may be followed for the aforementioned uses.

The connection device itself may be constructed of any durable material and of any shape and dimension as long as its overall appearance is symmetrical as described above. Thus, plastics (including high density plastics such as polyurethane, polyethylene, polypropylene, polyethylene terephthalate, polyacrylates, polyacetyl, etc.), metals (including iron, steel, aluminum, etc.), and oak, cedar, etc. Any type of solid wood can be used for this purpose. It is also possible to use combinations of these materials (such as mixtures of different plastics, plastic coated metals or wood, etc.).

In particular, when the adhesive is used in conjunction with the connecting device, a device may be employed in which the surface area is increased for the surface or the edge or both, through texturing, roughening, or the like. Thus, such an increase in surface area may contribute to an increase in adhesion during use and may also strengthen the joint (such as a truss plate).

As mentioned above, it is very important to provide a method of joining adjacent wood boards such that the wood boards do not contact each other during installation. The spacing can be from about 1/16 inch to about ¼ inch, so it is necessary to make the depth of the cavity in the wood board less than half the total length of a single connecting device. Architectural variations in many regions have various requirements with respect to these gaps, but the gaps commonly used in relation to gaps between adjacent edges (to allow for expansion and contraction of panels due to fluctuations in moisture and / or temperature) are 1 / 8 inches. This can be achieved by providing an LTD of sufficient length, where the clearance is substantially constant and cannot be eliminated when such LTD is inserted into the cavity of an adjacent board. Alternatively, a post may be provided in the center of the LTD to provide the spacing in use.

Since the cavity is preferably complementary in shape and dimension to the connecting device, any shape or dimension can be employed with respect to the connecting device and the wood board cavity if this requirement is met. Thus, if the connecting device is elliptical, the cavity will likewise be complementary elliptical indentations of the same dimensions. In addition, when the connecting device is a rectangular disk, the cavity (slot) will be formed in conformity with this shape and dimension. In one particularly preferred embodiment, the connecting device may have pins in the center portion to help separate adjacent wood boards from each other. In addition, the cavity (slot) has a flare portion (or post portion as described above) to facilitate the insertion of the flat connection device, and further the cavity of the second wood board at the other end of the connection device during roof construction. It makes it easy to insert in.

In addition, as mentioned above, the need for enabling reliable attachment of tapes requires the development of connecting devices that do not come into contact with both the top and bottom surfaces of the wood board during use. Thus, the overall method is that the connecting device or the plurality of connecting devices can be inserted into at least two wood boards, and at the same time no contact occurs between the two wood boards, and the wood boards are placed in parallel relationship with each other. It will allow no contact between the connecting device (or plural connecting devices) and the top and bottom parts of the wood board connected to the connecting device.

This method is more than a method of connecting the wooden boards constituting the roof or wall to the roof or wall frame before attaching them to the roof or wall frame, and the tape is reliably attached to the wooden boards in areas where the target wooden boards do not touch each other. It offers more than just the way it is allowed to be. In addition to the highly desirable results described above, the method is surprisingly unexpected due to the weight of the construction worker and the unanticipated ability of such an operator to withstand large load forces in relation to the conventional load forces generally associated with materials to be transported on the roof during construction of the roof. It was confirmed to provide. This load bearing result is described in detail below.

Wood boards that can be used for roof construction can be of any type, including plywood, oriented strand boards, and the like.

The above and other objects of the present invention will become apparent upon reading the following description with reference to the accompanying drawings.

1 is a cross sectional view of a disk 10 inserted into a cavity 12, 14 of the periphery 13, 15 of two adjacent wood boards 16, 18. As can be seen, the disk 10 is in contact with the interior of the cavity 12, 14 such that the distance between both wooden boards 16, 18 is apparent. The tape (not shown) may then be attached in contact with the top portion 20, 22 of both wood boards 16, 18. If a plurality of disks are used, the distance between the wooden boards 16, 18 will be nearly constant along the periphery 13, 15.

The discs of FIGS. 2 and 3 only show that such devices which are elliptical as in reference numeral 24 or rectangular as in reference numeral 26 can be altered or formed in such a way as to increase the surface area, which surface area increase. Helps to attach the disk to the cavity in the wood board (not shown) into which the disk is inserted.

4 is a cross-sectional view of another possible embodiment, in which the disk 28 has a pin 30 at the midpoint of the disk to help maintain a constant distance between the wooden boards 32 and 34. It is provided in parallel relationship. If the wooden boards 32 and 34 are not kept parallel to each other, they will be oblique, which may adversely affect the spacing with other parts of the target roof. In addition, the flare portions 36 and 38 of the wood boards 32 and 34 allow the insertion of the disk 28 with the portion complementing the shape of the flares 40 and 42 provided near the intermediate point, thereby allowing the wood to be inserted. Not only does it facilitate insertion of the disk 28 into the cavities 44, 46 in the periphery 48, 50 of the boards 32, 34, but also allows the disk 28 to fit firmly and snugly in the cavity during use. It becomes possible.

In order to ensure that the load transfer device (LTD) of the present invention can provide the required load capacity, a concentrated load test is carried out to provide the load transfer device of the present invention and the current load transfer device currently used in the building industry (" H "-clip). Building codes and regulations require that the deformation of the cover should not exceed 0.5 "under a load of 200 pounds, usually when the roof grade is 24. In previous tests conducted using H-clips, The H-clip was found to fall from the specimen before the test was completed The specimen of the load-bearing / transfer device (biscuit) of the present invention may be placed above or below the area in which the specimen is placed (whether biscuits, clips or The shoulder, which is the part of the board surrounding the cavity into which the external device is inserted, is broken by the specimen; nevertheless the specimen passes the requirements described in the building codes and regulations described above (known in the art as PS-2). Therefore, the load transfer device of the present invention maintains its integrity to some extent when used in the manner described above (ie, when the concentrated load is applied to the position of the biscuits, The kit will remain in place).

In addition, the cavity of the target wood board may be of any shape that facilitates the entry of the LTD itself, especially at the entry point. Thus, the edge of the inlet point may be curved, tapered, or any similar appearance to facilitate work. In most instances, it will be important to facilitate the task if the user has a large number of tools and other instruments in hand.

It is believed that the highest concentrated load on the roof covering will occur just below where the walk takes place during construction. For example, a 200-pound person carrying 80 pounds of shingles down a roof slope can apply a load of up to 68% greater than its gross weight (Harper, FC, et al. Force exerted on the floor ", research paper 32 of the National Building Society of London, UK). Since the walking load is applied for less than 1 second, the total load can be reduced as follows by the load duration factor (1 / 1.22) for the short-term test.

If a person stands in one position for a short period of time, the effective load is lower (up to 280 lb) and the load is distributed over a larger area by both feet.

In this respect, a minimum load of 400 pounds provides a small safety margin, which is based on the consideration of building uncertainty. Therefore, it is important that any load transfer device remain intact for loads of up to 400 pounds.

Different load transfer / support devices (biscuits) of the present invention made of different materials and different dimensions were made and analyzed to determine the effectiveness of these devices withstanding such loads in use. The material according to the design shown in FIG. 1 is as follows.

material thickness 1/8 " 1/16 " Length of ltd wood 1.75 " River 2.2 "-3.5" Acetyl 2 "-3.5"-4.5 " High density polyethylene 2 "-3.5"-4.5 " aluminum 2 "-3.5"-4.5 "

The modulus of elasticity (MOE) of some of the materials is also important in the determination of the effectiveness. The greater the modulus of elasticity of the material, the better the disks, biscuits, etc. made of this material can withstand the load and withstand the greater weight. This greater load carrying capacity is provided in relation to the flexibility of the device, and furthermore in terms of the ability of the material to sustain weight when applied to the areas directly affected by the weight and to areas adjacent thereto. However, it is not limited to any particular scientific theory. If the stiffness of the material is very large, it has been shown that the device will destroy the shoulder portion of the board before the device itself is damaged to any acceptable range. If the stiffness of the material is very low, further deformation of the device and joints under intensive load is allowed. Thus, as mentioned above, all of the materials will meet the needs of the present invention, but the device is preferably made of a material having a MOE of 10,000,000 psi or less, more preferably of a material having a MOE of less than 1,000,000 psi, Most preferably, a material having a MOE of 100,000 to about 500,000 psi. The MOE of high density polyethylene is about 200,000 psi and the polyacetal MOE is about 305,000 to about 380,000 psi. The MOE of aluminum is as high as 10,000,000 psi. The above enumeration is not an exhaustive list of all materials available for the present invention, but is an example.

The measuring method of supporting load is as follows.

First, how the lower surface of LTD and H-clip behaves under the condition of concentrated load. To meet PS-2 requirements, LTD panels are

a) the strain should not exceed 0.5 "under a concentrated load of 200 pounds,

b) The ultimate load (under walking conditions as described above) shall exceed 400 pounds.

Even if the PS-2 requirement is met, another functional product requirement that appears to be important is that the entire panel, including the LTD, will not break shoulders in the area where the underside of the LTD is located before the concentrated load reaches 400 lbs. Is the ability to prevent.

The analysis performed to determine the desired level of effectiveness is a variance calculation analysis. In practice, the structure to be analyzed was analyzed for deformation and load bearing capacity in a laboratory environment to avoid the possibility of injury to persons during the actual test of the built roof or the building roof. TECO QL-2 panel performance tester was used for this analysis. This facility is a fully automated computer controlled machine adapted to perform tests in accordance with the concentrated static, impact load and strain test requirements of PS 2-92. The facility is equipped with a " floating bed " which facilitates the impact test, a mechanism for testing concentrated loads and deformations, extreme loads, impact loads, and edge-supported panels. The thickness of the test panel was about 7/16 inch, the machine can test for a thickness of ¼ to 1 ⅛ inch, and the length of the panel to be tested (board) can be 16 to 48 inches. In a test with two boards connected through the apparatus of the present invention, a 48 inch board was used. During the installation of boards measuring 48 inches (121.92 cm) × 96 inches (243.84 cm), simulated joists (all three) are installed in the installation to allow the roof covering to perform tests that are almost similar to those under load. It was. The board was connected to the joist to the simulated joist, and then four devices of the invention were inserted into a cavity provided at the periphery of the board (the device was about 8 inches in length and inserted in the width direction). Thereafter, complementary cavities were provided for connection to this pre-inserted device and a second board of the same dimensions was supplied. Thereafter, the second board was connected without directly contacting the first board via the apparatus. The floating panel bed was then moved to a position below the two boards thus connected to the device, and pressure was applied to a specific area of the board to measure the supporting load and deformation of the board. Using a pneumatic application device, pressure was applied to two locations on the subject board provided with a 2,000 pound load cell (according to PS 2-92 test requirements). In addition, the deformation after the pressure (weight) was applied was recorded using a high resolution digital encoder.

Therefore, at the time of application of the test weight (pressure), the measurement was performed by calculation by a variable analysis (ANOVA) method. This method is similar to the regression analysis used to investigate and model the relationship between a response variable and one or more independent variables. However, variance analysis and regression analysis are different in two ways. That is, the independent variable is quantitative (categorical) and assumptions are made about the nature of the relationship between the variables (ie, the model does not include the coefficients of the variable). In practice, variance analysis extends two sample t-tests that test the identity of two population means to a more general null hypothesis that compares the identity of two or more means against an unequal average. If the classification of treatment is made by two variables or factors, binary variance analysis tests for equality of population means.

The population mean is the same for each test and it is assumed that the difference in the sample mean is determined by calculating the p-value for the sample mean. Thus, this method takes into account the possibility that the two sample means are spaced at some intervals when two sample means are obtained with the same sample mean from the two processes. If the p-value is small (ie less than 0.05), the population mean is concluded to be different.

Hereinafter, the abbreviations are as follows.

DF = degrees of freedom. The extent to which the distribution is further extended. The larger the measured value, the smaller the distribution variance.

SS = sum of squares. This represents the total amount of change in the measured value.

MS = MS error is the square of the joint standard deviation.

F = F test. This test answers the question of whether the two population variances are different. Because this test determines whether two populations have similar or different factors, it uses the sample variance between the populations tested. However, this test actually tests the degree of difference in sample variance only if sample variance is present. For F-values, values greater than 4 are very large, but closer to 1 means that the population mean of the measurements is very similar between the two populations.

Therefore, the analysis was performed in the order described later.

In the first test, the lower surfaces of acetyl and aluminum LTD were found to have significantly better performance than H-clips with regard to deformation under a concentrated load of 200 lb. Steel, wood and HDPE did not differ significantly from H-clips.

Subsequently, further tests were conducted to determine whether the load transfer device (s) under test differed from the ultimate concentrated load with respect to their ability to support the load.

In addition, the test showed that the bottom face of all LTDs did not differ significantly from the H-clips.

Next, the amount of change in thickness was tested in the apparatus of the present invention.

Tests conducted on the bottom face of two LTDs of different thicknesses show that, for deformation under 200 lb of concentration, a 0.0625 inch thick LTD has significantly better performance than an LTD of 0.125 inch thick (eg, Table 3). Reference).

The ultimate concentrated load was then tested for the same device for comparison.

The test shows that no significant difference is investigated in relation to the ultimate concentrated load between the two different thicknesses (see Table 4).

After this, the failure load was analyzed for the same apparatus.

The test shows that with respect to the breaking load the bottom face of the 0.0625 inch LTD is significantly better than the bottom face of the 0.125 inch LTD.

In the concentrated load test, the bottom face of the LTD showed that it could work just like the H-clip, so we continued to test the geometry to optimize the bottom face of the LTD. It has been determined that the 0.0625 inch LTD underside has significantly better performance than the 0.125 inch LTD underside with respect to the strain and fracture loads under 200 lb concentrated load, the 0.125 inch LTD underside was excluded from the following evaluations: .

The following tests were made on three sizes (2.25 ", 3.5" and 4.5 ") of acetyl, aluminum and HDPE with a thickness of 0.0625 inches.

As such, the test shows no significant difference between materials of different sizes with respect to strain under 200 lb of concentrated load, ultimate concentrated load, and breaking load.

Although there is no significant difference between different sizes of material, it is believed that there is a pattern showing that the bottom face of the large (long) LTD is more suitable to meet the minimum load requirement of 400 lb. It is also clear from the analytical results that acetyl materials have a lower tendency to break shoulders above or below the LTD during the test, even under extreme loads, compared to the rest of the materials. Thus, acetyl materials are preferred over the rest of the materials, but are not required.

Although the present invention has been described and disclosed in connection with specific preferred embodiments and examples, it is in no way intended to limit the invention to these specific embodiments, but rather the invention may be defined by the appended claims. It includes structural equivalents, all modifications, modifications, and equivalents.

According to the invention, there is provided a simple way of reliably connecting these wooden boards during the construction of the roof with the wooden boards making up the building roof. Specifically, the user can easily install a connecting device (load transfer device) in the target wooden board and use at least one of the connecting devices so that the wooden board is held in place for a sufficient time before attachment to the roof frame. Adjacent wood boards can be easily connected to the target wood board.

Claims (22)

A building structure selected from the group consisting of roofs and walls, The structure comprises at least a first wood board and a second wood board connected together to at least one connecting device; The first wood board and the second wood board each include a top surface portion and a bottom surface portion, each having four peripheral portions, and at least one peripheral portion of each wooden board, at least for insertion of at least one connecting device. One cavity is provided; The connecting device is made of a durable material and has a first end and a second end; A first end of the connecting device is inserted into the at least one cavity of the first wood board, and a second end of the connecting device is inserted into the at least one cavity of the second wood board; Peripheral portions of the first wood board and the second wood board into which the connecting device is inserted are parallel to each other, but not in contact with each other; And the connecting device does not contact the top or bottom portion of the first wood board and the second wood board. The building structure of claim 1, wherein the first and second ends of the connecting device have exactly the same shape and dimensions. The apparatus of claim 2, wherein the at least one cavity in the first wood board and the at least one cavity in the second wood board are both in shape and dimension of the first or second end of the connecting device. A building structure having a shape and dimensions complementary to. The building structure of claim 1, wherein a plurality of cavities are present in the first board and the second board, and a plurality of connecting devices are inserted into at least two of the plurality of cavities. 5. The building structure of claim 4, wherein the plurality of connection devices are each substantially identical and have first and second ends having substantially the same shape and dimensions. 6. The method of claim 5, wherein the plurality of cavities in the first wood board and the second wood board are substantially the same, have substantially the same shape and dimensions, and the shapes and dimensions of the cavity are A building structure complementary to the shape and dimensions of the first or second end of the connecting device. The building structure of claim 1, wherein the at least one connecting device has a rough appearance on its surface. The building structure of claim 1, wherein the at least one connecting device has an adhesive layer on its surface. The building structure of claim 1, wherein the at least one connecting device comprises a fin structure that spaces the first wood board and the second wood board at a substantially constant distance. The building structure of claim 1, wherein the cavity of the first wood board and the second wood board includes a flare to facilitate insertion of the at least one connecting device. 4. The building structure of claim 3, wherein the at least one connecting device has a rough appearance on its surface. The building structure of claim 3, wherein the at least one connecting device has an adhesive layer on its surface. The building structure of claim 3, wherein the at least one connecting device comprises a fin structure that spaces the first wood board and the second wood board at a substantially constant distance. 4. The building structure of claim 3, wherein the cavity of the first wood board and the second wood board includes a flare to facilitate insertion of the at least one connecting device. 5. The building structure of claim 4, wherein the plurality of substantially identical connecting devices each have a rough appearance on its surface. The building structure of claim 4, wherein the plurality of substantially identical connecting devices each have an adhesive layer on its surface. The building structure of claim 4, wherein the plurality of substantially identical connecting devices each comprise a fin structure that spaces the first wood board and the second wood board at a substantially constant distance. The building structure of claim 4, wherein the plurality of substantially identical cavities in the first wood board and the second wood board each have flares to facilitate insertion of the plurality of substantially identical connecting devices. . 7. The building structure of claim 6, wherein the plurality of substantially identical connecting devices each have a rough appearance on its surface. The building structure of claim 6, wherein the plurality of substantially identical connecting devices each have an adhesive layer on its surface. 7. The building structure of claim 6, wherein the plurality of substantially identical connecting devices each comprise a fin structure that spaces the first wood board and the second wood board at a substantially constant distance. The building structure of claim 6, wherein the plurality of substantially identical cavities in the first wood board and the second wood board each have flares to facilitate insertion of the plurality of substantially identical connecting devices. .

Images