Patent Publication Number: US-2015082736-A1

Title: H-beam and method for constructing concrete form using h-beam and non-metallic sheathing board

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an H-beam for connecting non-metallic (e.g., foams such as Styrofoam and plastics) sheathing boards having heat-insulating properties and used as inner and outer insulators for construction without breaking up after pouring concrete, and a method for constructing a concrete form using the H-beam. 
     2. Description of the Related Art 
     In general, construction materials, such as a plurality of sheathing boards functioning as form boards for walls defining an outer appearance of buildings and flat ties functioning as support bars by being embedded in concrete poured between the sheathing boards, are used for construction. In addition, horizontal support bars (pipes) are mounted to hooks connected by wedges at end portions of the flat ties exposed to the outside of the sheathing boards in order to endure a concrete pressure, or back-up plates for covering and reinforcing connection portions between the consecutively arranged sheathing boards are mounted by means of the flat ties. 
     Schematically describing an exemplary conventional process of forming walls of a building, a plurality of sheathing boards spaced a certain distance apart from each other in a width direction are consecutively arranged in a longitudinal direction while standing upright, and then concrete is poured into the space between the sheathing boards and cured, thereby constructing the upright walls. 
     A process of forming laminated plates (slabs) on the top of the upright walls includes disposing layers of wood horizontally on the top of the upright walls, disposing sheets of plywood on the layers of wood and securing the same using nails, disposing heat-insulating (dustproof) Styrofoam on the sheets of plywood, and removing the layers of wood and sheets of plywood after pouring concrete. 
     When the sheathing boards are consecutively arranged in the longitudinal direction, the lateral end portions of the sheathing boards are connected to each other using, for example, wires so as to extend the walls in the longitudinal direction. 
     However, in such a conventional process of extending the sheathing boards in the longitudinal direction, because an additional connection member for connecting the sheathing boards is not provided, construction processes including wire connection become complicated, and wire connection does not guarantee firmness of the sheathing boards, which may cause a problem such that the sheathing boards connected in the longitudinal direction break due to a load of concrete poured between the sheathing boards. 
     SUMMARY OF THE INVENTION 
     Therefore, it is an object of the present invention to provide an H-beam and a method for constructing a concrete form using the H-beam and non-metallic sheathing board, in which the H-beams connect edge portions of a plurality of sheathing boards spaced a certain distance apart from each other in a width direction to receive concrete poured therebetween and consecutively arranged in a longitudinal direction while standing upright so as to extend the sheathing boards for upright walls straight in the longitudinal direction, and also connect edge portions of sheathing boards for laminated plates (slabs) disposed horizontally on the top of the sheathing boards for upright walls so as to extend the sheathing boards horizontally, thereby achieving connection of the sheathing boards rapidly and easily, simplifying construction processes, remarkably reducing work time, and as a result improving work efficiency. 
     It is another object of the present invention to provide an H-beam and a method for constructing a concrete form using the H-beam and non-metallic sheathing board, by which edge portions of the sheathing boards are firmly secured, the sheathing boards can stably endure a load of concrete, and accordingly work stability and resultant reliability are improved. 
     In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of an H-beam configured to connect edge portions of a plurality of sheathing boards spaced a certain distance apart from each other in a width direction to form a space therebetween to receive concrete poured therein and consecutively arranged in a longitudinal direction while standing upright so as to extend the sheathing boards straight, the H-beam comprising: a middle support part interposed between two adjacent sheathing boards so that lateral surfaces of the edge portions of the two adjacent sheathing boards respectively contact both lateral surfaces of the middle support part and are supported by the middle support part; and edge connection parts bent perpendicular from both side end portions of the middle support part and extending forward and backward in the longitudinal direction in order to cover front and rear surfaces of the edge portions of the sheathing boards and support the same. 
     As is apparent from the above description, the H-beams according to the present invention connect the edge portions of a plurality of sheathing boards which are spaced a certain distance apart from each other in the width direction to receive the concrete poured therebetween and are consecutively arranged in the longitudinal direction while standing upright so as to extend the sheathing boards for upright walls straight in the longitudinal direction, and also connect the edge portions of the sheathing boards for laminated plates (slabs) disposed horizontally on the top of the sheathing boards for upright walls so as to extend the sheathing boards horizontally. Accordingly, since connection of the sheathing boards can be achieved rapidly and easily, construction processes are simplified and work time is remarkably reduced, which results in improvement in work efficiency. 
     Further, in the case in which the sheathing boards made of Styrofoam are used, the sheathing boards can be used as inner and outer insulators for buildings without breaking up after pouring concrete, thereby remarkably reducing construction processes. 
     Further, since the edge portions of the sheathing boards are firmly secured, the sheathing boards can stably endure a load of concrete, and accordingly work stability and resultant reliability are improved. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a perspective view illustrating an H-beam according to one embodiment of the present invention; 
         FIG. 2  is a schematic perspective view illustrating a process of constructing sheathing boards using an H-beam according to one embodiment of the present invention; 
         FIG. 3  is a schematic cross-sectional view illustrating a process of constructing sheathing boards using an H-beam according to one embodiment of the present invention; 
         FIG. 4  is a schematic cross-sectional view illustrating an H-beam according to another embodiment of the present invention; 
         FIG. 5  is a schematic cross-sectional view illustrating a construction state of sheathing boards for slabs using an H-beam according to another embodiment of the present invention; and 
         FIG. 6  is a perspective view illustrating an example of sheathing boards which can be used in the embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the annexed drawings. 
     As shown in  FIGS. 1 through 3 , an H-beam according to one embodiment of the present invention functions to connect edge portions of a plurality of sheathing boards  10  which are spaced a certain distance apart from each other in a width direction to define a space therebetween to receive the poured concrete therein and are consecutively arranged in a longitudinal direction while standing upright, thereby extending the sheathing boards  10  for upright walls straight in the longitudinal direction. 
     The H-beam  30  includes a middle support part  32  interposed between two adjacent sheathing boards  10  so that lateral surfaces of the edge portions of the two adjacent sheathing boards  10  respectively contact both lateral surfaces of the middle support part  32  and are supported by the middle support part  32 , and edge connection parts  33  bent perpendicular from both side end portions of the middle support part  32  and extending forward and backward in the longitudinal direction in order to cover front and rear surfaces of the edge portions of the two adjacent sheathing boards  10  and support the same. 
     The edge portion of the sheathing board  10  covered by the edge connection parts  33  is formed with a concave recess  12  (refer to  FIG. 6 ) by which the edge connection parts  33  are positioned on the same plane as the front and rear surfaces of the sheathing board  10 . The edge connection parts  33  have an interval in the width direction, which is equal to a thickness of the edge portion of the sheathing board  10 . 
     The edge portion of the sheathing board  10  contacting the middle support part  32  has slanted surfaces  13  formed at front and rear corners thereof. Corresponding to the slanted surfaces  13  of the sheathing board  10 , the H-beam  30  also has slanted surfaces  34  formed at inner corners at which the middle support part  32  and the edge connection parts  33  adjoin so as to closely contact the slanted surfaces  13  of the sheathing board  10 . 
     A through-hole  12   a  (refer to  FIG. 6 ) is formed at the concave recess  12  of the edge portion of the sheathing board  10 , and an additional securing pin  55  is fitted through the through-hole  12   a.  The edge connection parts  33  opposing each other in the width direction are fowled with pin holes  33   a  aligned in the width direction. In the state in which the pin holes  33   a  of the edge connection parts  33  are aligned with the through-hole  12   a  of the edge portion of the sheathing board  10  interposed between the two opposing edge connection parts  33 , the securing pin  55  is fitted through the pin holes  33   a  and the through-hole  12   a,  thereby securing the sheathing board  10  to the edge connection parts  33 . 
     The securing pin  55  may be formed in a long bar shape having a function of connecting the sheathing board  10  and the edge connection parts  33  after fitted through the pin holes  33   a  and the through-hole  12   a,  and may be made of a PVC material. 
     A flat tie  20  is arranged perpendicular to the edge portions of the sheathing boards  10  across the pair of sheathing boards  10  spaced apart from each other in the width direction. The middle support part  32  is formed with a tie receiving groove  31  in which the flat tie  20  is inserted. 
     The flat tie  20  arranged across the pair of sheathing boards  10  spaced apart from each other in the width direction is provided in plural. The concave recess  12  of the sheathing board  10  is formed with a T-shaped tie slit  12   b  (refer to  FIG. 6 ) which one of the flat ties  20  penetrates. Each of the edge connection parts  33  has a cut portion  33   b  cut away from a distal end portion thereof corresponding to the tie slit  12   b,  so that the flat tie  20  penetrates the cut portion  33   b.    
     The cut portion  33   b  has an opened top so as not to interrupt upward movement of the flat tie  20  when cutting end portions of the flat tie  20  fitted through the tie slit  12   b  of the sheathing board  10  by shaking the end portions of the flat tie  20  up and down after pouring concrete, and a support step  33   c  formed at a bottom thereof to support a bottom surface of the flat tie  20 . 
     The edge connection parts  33  have slanted guide surfaces  33   d  formed at inner corners of the distal end portions thereof so as to guide the edge portion of the sheathing board  10  to be smoothly fitted into the space between the edge connection parts  33 . 
     As shown in  FIGS. 4 and 5 , an H-beam  35  according to another embodiment of the present invention functions to connect edge portions of sheathing boards  15  for slabs disposed horizontally on the top of the sheathing boards  10  for upright walls so as to extend the sheathing boards  10  and  15  horizontally, and also functions to connect the sheathing boards  15  to layers of wood  57  disposed beneath the sheathing boards  15  and held up by supports  56  so as to firmly secure the sheathing boards  15 . 
     The H-beam  35  includes a middle support part  35   a  interposed between two adjacent sheathing boards  15  so that lateral surfaces of the edge portions of the two adjacent sheathing boards  15  respectively contact both lateral surfaces of the middle support part  35   a  and are supported by the middle support part  35   a,  edge connection parts  35   b  bent perpendicular from top and bottom portions of the middle support part  35   a  and extending forward and backward in the longitudinal direction in order to cover top and bottom surfaces of the edge portions of the two adjacent sheathing boards  15  and support the same, and a nail hole  35   c  formed vertically through the middle support part  35   a , through which an additional nail  58  is driven into the layers of wood  57  disposed beneath the H-beam  35 . 
     The H-beam  35  further includes a hitting space  35   d  formed above the nail hole  35   c  so as to allow a user to hit the nail  58  using a hammer or the like. 
     Non-described reference numeral  40  refers to a corner bar for connecting the sheathing board  10  for upright walls and the sheathing board  15  for slabs perpendicular to each other. 
     As shown in  FIG. 2 , each of the flat ties  20  has wedge holes  21   a  formed at both end portions thereof exposed to the outside of the sheathing board  10 , and horizontal support bars (not shown) may be mounted to additional hooks (not shown) connected by wedges (not shown) through the wedge holes  21   a.    
     Herein, additional square wooden beams (not shown) for supporting the horizontal support bars may be arranged in the space between the horizontal support bars and the sheathing boards  10 . 
     Alternatively, as shown in  FIG. 2 , before mounting the horizontal support bars, additional back-up plates  54  for reinforcing connection portions between the consecutively arranged sheathing boards  10  may be mounted through wedge holes  21   a  formed at both end portions of the flat ties  20  exposed to the outside of the sheathing boards  10 . 
     According to a method for constructing the concrete form using the H-beams according to the present invention constituted as above, the H-beams  30  for connecting the sheathing boards  10  for upright walls are prepared. 
     Next, the sheathing boards  10  spaced a certain distance apart from each other in the width direction are consecutively arranged in the longitudinal direction while standing upright. 
     At this time, the edge portions of each two adjacent sheathing boards  10  arranged in the longitudinal direction are inserted into the space between the edge connection parts  33  of the H-beam  30  interposed therebetween, and accordingly the sheathing boards  10  are connected by the H-beams  30 . 
     The H-beams  30  and the edge portions of the sheathing boards  10  are secured by the securing pins  55 . 
     Next, the flat ties  20  are fitted through the sheathing boards  10  spaced apart from each other in the width direction so as to maintain the predetermined interval in the width direction between the sheathing boards  10 , thereby completing construction of the sheathing boards  10  for upright walls. 
     On the other hand, in order to construct slabs, the H-beams  35  for connecting the sheathing boards  15  for slabs are prepared. 
     Next, the sheathing boards  15  for slabs are horizontally disposed on the top of the sheathing boards  10  for upright walls, and the edge portions of each two adjacent sheathing boards  15  for slabs are connected by the H-beams  35  for slabs, thereby extending the sheathing boards  15  horizontally. 
     The H-beams  35  and the edge portions of the sheathing boards  15  for slabs are also secured by the securing pins  55 . 
     Next, the layers of wood  57  disposed beneath the sheathing boards  15  and held up by the supports  56  and the H-beams  35  for slabs are secured to each other by the nails  58 , thereby completing construction of the sheathing boards  15  for slabs. 
     In addition, the back-up plates  54  are mounted through the wedge holes  21   a  formed at both end portions of the flat ties  20  exposed to the outside of the sheathing boards  10  for upright walls, and the horizontal support bars are mounted by connecting the hooks. 
     In this state, concrete is poured into the space between the sheathing boards  10  for upright walls and onto the sheathing boards  15  for slabs and is cured, thereby completing construction of upright walls and slabs for buildings. 
     As described above, the H-beams according to the present invention connect the edge portions of a plurality of sheathing boards spaced a certain distance apart from each other in the width direction to receive the concrete poured therebetween and consecutively arranged in the longitudinal direction while standing upright so as to extend the sheathing boards for upright walls straight in the longitudinal direction, and also connect the edge portions of the sheathing boards for laminated plates (slabs) disposed horizontally on the top of the sheathing boards for upright walls so as to extend the sheathing boards horizontally. Accordingly, since connection of the sheathing boards can be achieved rapidly and easily, construction processes are simplified and work time is remarkably reduced, which results in improvement in work efficiency. Further, since the edge portions of the sheathing boards are thinly secured, the sheathing boards can stably endure a load of concrete, and accordingly work stability and resultant reliability are improved. 
     Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.