MXPA99002225A - Double locking flooring system for a construction site - Google Patents

Abstract

A method and apparatus for the construction of a two-layer flooring system for use at a construction site such as an oil well drilling site. The flooring system is particularly well suited for use in areas with dry, sandy soil. The flooring system is formed by interlocking both the ends and sides of a plurality of mat units (10). Each of the mat units (10) includes two layers of boards (12, 14). The first layer (12) has end locking tabs (22) extending beyond the edge (18) of the first layer and corresponding end locking slots (24), formed by offsetting selected boards (16). The second layer (14) similarly includes side locking tabs (32) and corresponding side locking slots (34), also formed by offsetting selected boards (39, 38). The arrangements of these tabs and slots is such that half-size units (58) and inverted units (60) may be utilized, allowing a wide variety of patterns of interlocking units to be utilized for the flooringsystem. The method of constructing a flooring system utilizing such units includes positioning one mat unit (10) adjacent to other mat units and inserting the tabs (22) into the corresponding slots (24) to interlock the units. By interlocking a plurality of such units, a two-layer flooring system is fabricated at a construction site which is strong and sturdy enough to support heavy equipment, yet easily installed and removed.

Description

DOUBLE INTERLOCKING SOLARING SYSTEM FOR A CONSTRUCTION SITE BACKGROUND OF THE INVENTION FIELD OF THE INVENTION In the present invention, it generally relates to a welding system for a construction site and more particularly to a two-layer welding system formed by a plurality of interlacing welding units and having extreme interlacing appendages and lateral interlacing appendages. and corresponding grooves, in such a way that the welding units can be placed and retained in place without additional fastening means or additional layers.

DESCRIPTION OF THE PREVIOUS TECHNIQUE Oilfield exploration and drilling operations are often undertaken in geographic areas that are, in their natural state, inaccessible to the vehicles and equipment necessary for exploration. These areas include swamps, marshes, river beds, snow-covered regions and areas with soft or sandy soil. In order to explore for oil in such areas, it is necessary to locate heavy drilling facilities, vehicles and other equipment for some time on or adjacent to the location where the well is to be drilled. In order to transport this heavy equipment to the site and support the equipment on site, the industry has for many years used temporary roads leading to and from the site, and welding systems or coping on the particular site. The prior art systems have been designed primarily for swampy or marsh-like areas where the natural soil support is unsuitable for the equipment. Sometimes, such support systems are constructed manually at the construction site by placing a layer of individual wooden boards on the ground, adding a second layer of individual boards placed perpendicular to the first layer and joining the two layers together using nails or other bras. This laminating process is repeated until the welding system is sufficiently strong, usually requiring three or more layers for most areas. After the drilling operations are complete, the tables must be removed manually. These systems therefore require large amounts of time and manual labor to install and remove. Additionally, individual tables are often damaged when they are removed, so that they are unsuitable for reuse. Recently, a number of welding systems using mats or prefabricated welding units have been developed. These prefabricated units generally consist of multiple layers of boards and are placed and installed at the construction site to form the welding system. Penland, Patent of E.U.A. DO NOT. 4,462,712, incorporated herein by reference, discloses such a welding system, using interlacing brazing units and a third coating layer. Since those systems are designed for areas where ground support is inadequate, prior art systems often require the use of at least three layers of boards and / or manually connecting units at the construction site to ensure structural integrity. Drilling operations that take place in other areas such as in sandy and dry areas often require less support than those operations that take place in wet and humid areas. In many sandy and dry areas, the soil support would be sufficient to support the weight of the vehicles and equipment, but the loose sandy condition of the soil prevents the operation of the vehicles and equipment directly on the ground. In such areas, a welding system consisting of two layers of boards may be sufficient to support drilling operations. However, since the prior art systems require either the use of three layers of boards or the manual clamping on the site of the individual pieces with which the units are completely interlocked., unnecessary work and / or material should be used to build these systems when used in such dry sandy areas. As a result of the drawbacks of the prior art, characteristic of the systems described above, a considerable need for a two-layer brazing system that can be easily and economically installed at a construction site, such as a drilling site for oil wells. Despite this need, such a welding system has been unavailable until now.

BRIEF DESCRIPTION OF THE INVENTION It is therefore a feature of the present invention to provide a two-layer brazing system to be installed at a construction site, which is inexpensive to install and which has completely interlocking units. It is another feature of this invention that the system can be installed with minimal need for manual connection at the site of the individual units. A further feature of the present system is that the individual units which are half the size of the other mat units and the inverted mat units oriented perpendicularly to the other mat units can be used to facilitate the placement of the units. mats in a misaligned pattern and obtain an appropriate fit, for example around the edges of the welding system. An additional feature of the present invention is that the two-layer system is lighter and easier to install and remove from the construction site. Finally, a feature of the invention is the installation of a welding system with an arrangement of the interlacing appendages and the interlacing grooves which requires the installer to align the mat units correctly. The present invention is advantageous with respect to the prior art in that it consists of only two layers of boards and typically requires minimal or no manual clamping of the parts to each other on site, yet allows complete entanglement of the individual units and provides sufficient structural support for vehicles and equipment that travels on sandy and dry ground. The present invention is summarized in the sense that the welding system for use in a construction site or road is formed of a series of interlacing mat units formed of a plurality of wooden boards. Each mat unit can be constructed from only two layers of boards, including a first layer formed by a plurality of parallel boards of substantially uniform length and having a plurality of end interlacing appendages at one end and end interlacing grooves at the end. the other extreme. These appendages and end slots are formed of longitudinally misaligned boards of the upper layer. A second layer is formed of a plurality of parallel tables of substantially uniform length is connected in a substantially perpendicular position and underlying the boards of the first layer with the sides and ends of the second layer aligned with the sides and corresponding ends of the board. first layer. The second layer has a plurality of interlacing side appendages extending from one side and a plurality of interlacing side grooves on the other side. These lateral appendages and lateral grooves are formed by longitudinally misaligned boards of the second layer. The interlacing end appendages and the interlacing side appendages of the first mat unit can be positioned vertically inward of the interlacing end grooves and the interlacing side grooves of the adjacent mat units to intertwine and form a portion of the interlacing system. soladura. In order to achieve and understand in detail the manner in which the above-mentioned advantages and characteristics of the present invention, as well as others, will become apparent, a more particular description of the invention can be had, which is summarized briefly above. , with reference to the modalities illustrated in the appended drawings, drawings that are part of this specification. It should be noted, however, that the appended drawings illustrate only a typical embodiment of the invention and should not be considered, therefore, scope limitations, since the invention can admit other equally effective modalities.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a mat unit constructed in accordance with the present invention. Fig. 2 is a plan view of the welding system of the present invention that is installed using a series of the mat units shown in Fig. 1.

DESCRIPTION OF THE PREFERRED MODALITIES Referring to Figure 1, an individual mat unit of the present invention is shown and described. The mat unit 10 includes a first layer 12 with a second layer 14 attached and underlying the first layer as shown in Figure 1. The first layer-12 is formed of a plurality of parallel wooden boards 16 of substantially uniform length . Each table 16 is placed parallel to an adjacent table to form a first flat layer. The first layer 12 includes a first end 18 and a second end 20, and a first side 19 and a second side 21. Selected tables of the layer 12 are longitudinally misaligned such that they extend beyond the first end 18 of the first layer 12, forming interlacing end appendages 22 extending beyond the first end 18 of the first layer 12 and the interlacing end slots 24 that are spaced apart from the second end 20 of the first layer 12. Each interlacing appendix 22 thus formed is aligned with a corresponding interlacing end slot 24. The embodiment of Figure 1 exposes three such interlacing end appendices 22 and three corresponding interlacing end slots 24, such appendices and grooves remaining equally spaced along the respective ends of the first layer 12, misaligning every third. Table 16 of the first side 19 of the first layer 12. It will be clear, however, that various interlacing end distributions and appendages and corresponding end interlacing grooves, different from those described herein, can be easily used instead of the distribution of the present. Underlying the first layer 12 is the second layer 14 which may also be formed of a plurality of parallel tables 26 of substantially uniform length. Each board 26 of the second layer is attached to the overlapping boards 16 of the first layer by means of any conventional connection means such as nails, a bolt and nut assembly or an adhesive compound. The tables 26 of the second layer are aligned with each other to form a series of parallel tables connected in a position substantially perpendicular to the boards 16 of the first layer 12. The second layer 14 includes a first side 28 and a second side 30, and a first end 29 and a second end 31. The two layers are aligned such that the first end 18 and the second end 20 of the first layer 12 are aligned with the first end 29 and the second end 31 of the second layer 14 , respectively. Likewise, the first number 19 the second side 21 of the first layer 12 are aligned with the first side 28 the second side 30 of the second layer 14, respectively. The selected tables 26 of the second layer 14 are misaligned such that they are beyond the first side 28 of the second layer 14, forming the lateral interlacing appendices 32 which stop beyond the first side 28 of the second layer 14 and of interlacing side slots 34 which are spaced apart from the second side 30 of the second layer 14. Each interlacing side tab 32 thus formed is aligned with a transparent interlacing side slot 34. The embodiment of Figure 1 exposes 6 such appendages of interlacing latitudes 32 and 6 corresponding interlacing side grooves 34. In this embodiment, the appendicitis and the grooves are not evenly spaced along the respective sides of the second layer 14. Rather, the selected tables 26 that are misaligned from the interlacing side appendices 32 and the interlacing side grooves 34 are the third and ninth boards of one end 29 of the second layer 14 and the third, sixth and ninth tables of the second end 31 of the second layer 14. The second layer 14 of the embodiment of Figure 1 includes a plurality of center tables 38 in the central portion of the second layer 14. The center tables 38 are not used to form appendages and slots and, therefore, they are not misaligned. In the embodiment of Figure 1, 4 center tables 38 are used. At each end 29,31 of the second layer 14 there is provided a pair of edge tables 39 which are not used to form appendages and grooves and are not misaligned. As can be understood by not misaligning the center tables 38 and the edge tables 39, the mat units 10 present a side interlacing appendage pattern which requires the units to be completely aligned along the side with the aligned ones in a amount of a half of the unit. This distribution of lateral appendages also allows the effective use of half units on and inverted sides as will be explained more fully. Still referring to FIG. 1, each of the sphere units 10 is provided with less than one lifting attachment 36 to add a useful lifting line device in order to lift and position the sphere units. In the embodiment of figure 1 this accessory takes the form of glacial attachment loops which are connected to the first layer 12. These lifting attachments 36 do not provide any substantial obstacle to the use of the welding system after installation, since they are flattened easily by any vehicle that passes over them. Referring now to Figures 1 and 2 (for clarity, it is not shown in the individual tables in Figure 2) it is seen that if the number of center tables 38 used is as much as twice the depth of edge tables 39, it is possible to limit the possible placement of the units and still have an effective construction with only two sections of units. With this distribution of lateral appendages, the sphere units can be placed parallel, side by side with one another to form rows and columns, as shown in figure 2, units 48, 49, 50, 52. This alignment is possible, since the center tables 38 are aligned. Alternatively, the mat units 10 can be misaligned longitudinally by an amount equal to half the length of a unit 10, so that the units remain together, intertwined. The units 50, 52, 54, 56 are distributed in this misaligned manner. This misaligned pattern is possible since the center tables 38 are positioned in such a way that they are aligned with the edge tables 39 of two units that together form a space between the appendices equal to the space formed by the center tables 38. see figure two the half unit 58. The half unit 58 also uses a mixed pair of edge 39, but does not use the center tables 38. The half unit 58 is formed in such a way that the longitudinal dimension is approximately half the length of a regular 10 sphere unit. The half unit 58 can be constructed using tables for the first layer 12 which is about half the length of the tables 16 of the regular sphere units 10 and using medium from both the tables 26 of the second layer and mat units 10 regular. The half units 58 allow the user to complete the rows of units as shown in Fig. 2 in distributing the units to accommodate areas on the regular mat 10 are too long, for example at the edges and ends of the construction site. Also seen in Figure 2 is the inverted unit 60. The inverted unit 60 is a mat unit 10 that has been inverted in such a way that the second layer 14 is on top. In the present modality, the distribution of the interlacing end appendages 22 of the mat unit 10 is equal to the distribution of half of the interlacing side appendages 32. In this way, as shown in Fig. 2, when a mat unit is reversed 10 to form an inverted unit 60, the inverted unit 60 can be oriented particularly to the regular mat units, such that the interlacing side appendices 32 of the inverted unit 60 coincide with the interlacing end rounds 24 of the mat units 49 and 52 and the end stitching appendages 22 of the inverted unit 60 coincide 3 of the interlacing side grooves 34 of the mat unit 54. The inverted unit 60 may be provided with lifting attachments 36 arranged to the second layer 14 instead of to the first layer 12 or in addition to it. Alternatively, the units of this selected one may be provided with lifting attachment 36 alloyed to both the first and the second layer so that the mat unit 10 can be used as either a regular mat unit 10 or an inverted unit 60.

INSTALLATION METHOD Referring in particular to Figure 2, a method for constructing a welding system to be used at a construction site is disclosed. It is contemplated that during the installation of such a welding system a hoist, a crane or other lifting equipment is available on site. A forklift would directly fit each unit and place it in the proper position. If a crane is available, it typically includes a lifting line that can be attached to the individual welding units to unload such units from the vehicle that transported the units to the construction site. However, the lifting, aligning and descending operations discussed below can also be performed by any suitable mechanical device. The method contemplated for installing such a system includes providing a plurality of mat units 10 as previously described. Each of these mat units 10, of course, would have a plurality of interlacing end appendages 22 a plurality of interlacing end grooves 24, a plurality of interlacing side appendices 32 and a plurality of interlacing side grooves 34. Referring to FIG. to figure 2, 6 of such units 48, 49, 50, 52, 54 and 56 are shown, as well as half unit 58 and the inverted unit 60. Once the mat unit 48 is properly positioned on the drilling site, the mat unit 49 is positioned vertically in such a way that the interlacing side appendages 22 of the mat unit 49 are aligned with the interlacing end slots 24 of the mat unit 48. If not then the mat unit 49 makes position thereby interlacing the end from the sphere unit 49 to the end of the mat unit 48. It may be necessary to manually raise each mat a few centimeters to a ma I'll give it to you. Next, the mat unit 50 is positioned vertically in such a way that the interlacing side slots 34 of the mat unit 50 are aligned with the interlacing side tabs 32 of the mat unit 48. If it lowers then the mat unit 50 makes position. thus interlacing the side of the mat unit 50 to the side of the mat unit 48. The mat unit 52 is then positioned vertically in such a manner that the interlacing end appendages 22 of the mat unit 52 are aligned with the interlacing end slots 24 of the mat unit 50, and the interlacing side slots 34 of the mat unit 52 are aligned with the interlacing side tabs 32 of the mat unit 49. The mat unit 52 is then lowered into place, thus interlacing the end of the mat unit 52 to the end of the mat unit 50 and the mat angle 52 to the mat angle 49. In normal situations when the units are used in With adequate conditions and conditions, no additional fastening means such as nails are needed to secure one unit to another. In addition, it may be necessary to use some fastening means on selected indications to secure the units in position until the underlying floor is molded to the cold side of the unit. Such fastening means may be nails placed through the selected appendices to finish the units in place. Figure 2 also shows the use of the half unit 58 for longitudinally misaligning the mat units 56 and 54 in relation to the mat units 50 and 52, as previously described. The half-unit 58 is positioned vertically in such a way that the interlacing side grooves 34 of the half-unit 58 are aligned with three of the interlacing side-appendices 32 of the mat unit 50. The half-unit 58 is then lowered to its position, thus interlacing the side of the half unit 58 to a side half of the mat unit 50. Next, the mat unit 56 is positioned vertically in such a manner that the apparent interlacing ends 22 of the mat unit 56 are aligned with the end slots. of interlacing 24 of the half unit 58 the interlacing side grooves 34 of the mat unit 56 are clasped with three of the interlacing side appendices 32 of the mat unit 50 and three interlacing side appendices 32 of the mat unit 52. It is lowered then the mat unit 56 to its position, thus interlacing the end of the mat unit 56 to the end of the half unit 58 and giving the mat unit 56 with a side half of the mat unit 50 and a side half of the mat unit 52. Then the vertically matting unit 54 such that the end table appendages 22 of the mat unit 54 are aligned with the interlacing end slots 24 of the mat unit 56 and three of the interlacing side slots 34 of the mat unit 54 are-aligned with three of the interlacing side appendages 32 of the mat unit 52. The mat unit 54 is then lowered into place thereby interlacing the end of the mat unit 54 with the end of the mat unit 56 and interlacing one half in front of the unit mat 54 with one side half of mat unit 52. These steps are repeated with additional mat units, in the distribution of rows and columns from side to side, and either parallel, such as units 48, 49 and 52 or in a misaligned distribution typified by units 50, 52, 54 and 56 or in a combination of these two distributions. The termination of the welding system in this manner results in each mat unit being interlocked with the adjacent mat units on at least one end and at least on one side. The installation method shown in figure two can also include the use of inverted units accepted, previously described. By simply rotating a regular mat unit 10 on itself to form the inverted unit 60, in which the second layer 14 is the upper layer, added flexibility is provided to isolate the welding system. When the method is performed using the inverted unit 60 as shown in figure two, the inverted unit 60 should be installed preferably before the installation of the mat unit 54. After the mat units 48, 49, 50, 52 and 56 and the half unit 58 are in place as described above, the inverted unit 60 can be positioned vertically in such a manner that the interlacing side tabs 32 of the inverted unit 60 are aligned with the interlacing end slots 24 of the mat units 49 and 52. The inverted unit 60 can then be lowered into place, thus interlacing the side of the inverted unit 60 with the ends of both the mat unit 49 and the mat unit 52. The attached mat 54 vertically such that the interlacing end appendages 22 of the mat unit 54 are aligned with the interlacing end slots 24 of the mat unit 56, three d e the interlacing side slots 34 of the mat unit 54 are aligned with three of the interlacing side appendices 32 the mat unit 52 and the three remaining interlacing side slots 34 of the mat unit 54 are aligned with the interlacing side tabs 22 of the inverted unit 60. The mat unit 54 can then be lowered into its position by thus interlacing the end of the attached mat 45 with the end of the mat unit 56 and the angle of the mat unit 54 as well as a side-side dwelling. the mat unit 52 as with the end of the inverted unit 60. As can easily be appreciated, a different pattern magnitude can be formed by varying the manner in which the regular mat units are distributed such as 48, 48, 50, 42, 44 and 46 the half units 58 and the inverted units 60. Referring again to Figure 1, the mat units can typically be constructed with tables of m Adra lasts 20.32cm wide by 5.08cm thick. Although the applicant is referred to the parallel members of the mat units as tables, this term in its broad sense should be considered to include any elongated member said of wood or any other suitable material. It can be appreciated therefore, that the method and the apparatus for constructing a welding system at a construction site in accordance with the present invention exhibit numerous advantages in terms of construction, operation and installation, while providing a two-layer welding system with sufficient Resistance to meet the needs of the industry in some locations geographies. The various embodiments and modifications in accordance with the invention facilitate the transportation, construction, use and dismantling of the cost of a welding system for use in such construction sites. Further modifications and alternative embodiments of the apparatus of the method of this invention will be apparent to those skilled in the art in view of that description. According to previous, it tends to interpret that description with illustrative only and is for the purpose of showing to the experts in the art the way to carry out the •invention. It was implied that the forms of the invention shown and described herein should be considered as currently -preferred modalities. Several changes can be made in the shape, size and distribution of the parts. For example, equivalent elements or materials can be used in place of those illustrated or described in the present inverted parts and certain features of the invention can be used independently of the use of other features, all of which were evident even to a person skilled in the art after have benefit of this description of the invention.

Claims (12)

NOVELTY OF THE INVENTION CLAIMS

1. - A welding mat unit that is to be interlaced with a plurality of other similar units to form a welding system for use as a construction site or road, each unit consisting of only two layers of interconnected and removable wooden boards vertically to form a finished two-layer brazing system without the addition of individual tables for bonding purposes, each mat unit comprising: a first layer having a first end and a second opposite end and a first and second side and formed from a plurality of substantially parallel tables of substantially uniform length, the first layer having a plurality of interlacing end appendages resulting from the first end, the second opposite end of the first layer having a plurality of end grooves of entanglement aligned with said end appendages of interlacing, said appendices and end grooves formed We are longitudinally misaligning the selected tables of this first layer; a second layer having a first side and a second exposed side and a first and a second end and formed of a plurality of substantially parallel wooden boards of substantially uniform length joined in a substantially perpendicular position and underlying the boards of the first layer, the ends and sides of the second layer being aligned with the corresponding sides and ends of the first layer, the second layer having a plurality of interlacing side appendices extending from one side of the second layer and having the opposite side of the second layer. the second layer a plurality of aligned interlacing side slots, said side appendices and side slots formed by longitudinally misaligning the selected tables of the second layer; whereby the interlacing end appendages and the interlacing side appendages of a first mat unit are placed vertically in the interlacing end slots and the interlacing side slots of the adjacent mat units to form an interlaced portion of the interlacing system. finished two-layer welding, without the addition of individual tables for bonding purposes.

2. - The welding unit according to claim 1, further characterized in that the selected tables of the first layer are not adjacent to each other.

3. - The welding unit according to claim 1, further characterized in that the tables selected from each mat unit are each third table of a single side of the first layer, and the third, sixth and ninth layers of each side of the second layer.

4. - The welding unit according to claim 1, further characterized in that the second layer of each mat unit includes at least one edge board at each end and at least one pair of center boards, said appendages and grooves formed laterals misaligning the tables of the second layer differently from those of said edge tables and center tables.

5. - The welding unit according to claim 4, further characterized in that the number of center tables of the second layer of each mat unit is twice the number of the edge tables of the second layer at each end of the mat. said second layer.

6. - The welding unit according to claim 1, further characterized in that each mat unit includes a lifting attachment in such a way that the lifting line can be detachably joined to the unit and the unit can be lowered vertically to its position in the system with the use of a lifting device such as a crane.

7. A welding system that is formed by interlacing a plurality of mat units according to claim 1, further characterized in that the system also includes at least one half unit having a first layer formed of boards having a length that it is about half the length of the boards that form the first layer of the mat units of claim 1.

8. The system according to the claim 7, further characterized in that the number of boards used to form the second layer of the half unit is half the number of boards forming the second layer of the mat units of claim 1.

9. - A welding system that is form interlacing a plurality of mat units according to claim 1, further characterized in that the selected mat units are inverted units and whereby the interlacing end appendices of the vertically inverted units can be placed in the lateral interlacing slots of the adjacent mat units and lateral interlacing appendages of the vertically inverted units may be placed in the interlacing end slots of the adjacent mat units.

10. A method for constructing a two-layer batching system terminated from a plurality of interlacing mat units without the addition of individual tables for bonding purposes, the system to be used at a construction site or road, the method comprising the steps of: providing a plurality of interlacing mat units, each mat unit constructed of only two layers of interconnected wooden boards and having two ends and two sides, each mat unit comprising a first layer of boards substantially parallel, with a first layer having a plurality of interlacing end appendages and a corresponding plurality of opposite interlacing end grooves aligned and joined in a substantially perpendicular position to a second layer of substantially parallel boards and underlying the boards of the first layer, said second layer being layer a plurality of lateral appendages of ent recess and a corresponding plurality of aligned opposing interlacing side grooves; vertically placing a first mat unit with respect to a second mat unit; lowering the first unit with respect to the second unit in such a manner that a plurality and end interlacing appendages or interlacing side appendages of one of the first to the second mat unit engage a plurality of interlacing end grooves or side grooves of the second unit. interlacing the other of said first or second mat unit, thus interlocking at least a portion of said first mat unit to the second mat unit; and repeating the vertically placing and lowering steps using additional mat units, whereby each additional mat unit is at least partially interlocked on at least one end or side to the adjacent mat units previously lowered to form a system of Two-layer brazing finished without the addition of individual boards used for bonding purposes.

11. - The method according to claim, further characterized in that the step of providing interlacing mat units includes providing half units.

12. The method according to claim, further characterized in that the step of providing entanglement mat units includes providing inverted units. ANNEXED FILE [FIELD 571 SUMMARY OF THE INVENTION A method and apparatus for the construction of a two-layer brazing system for use in a construction site, such as a drilling site for oil wells; The welding system is particularly well suited for use in areas with sandy and dry soil; the welding system is formed by interlacing both the ends and the sides of a plurality of mat units; each of the mat units includes two layers of boards; the first layer has extreme interlacing appendages extending beyond the edge of the first layer and corresponding interlacing end slots, which are formed by misaligning selected tables; the second layer similarly includes interlacing side appendages and corresponding interlacing side grooves, which are also formed by misaligning selected tables; the distribution of these appendages and grooves is such that units of half size and inverted units can be used, allowing a unit of extensive patterns of interlacing units to be used for the welding system; the method for constructing a welding system using such units includes placing a mat unit adjacent to other mat units and inserting the appendices into the corresponding slots for interlocking the units; By interlacing a plurality of said units, two-layer welding system is manufactured in a construction site that is strong and strong enough to support heavy equipment, it can even be easily installed and uninstalled. P99-287F