Inserts for deck plates and deck plates for construction using the same

Abstract

The present invention relates to a deck plate for construction, and more specifically, to a deck plate insert that enables fastening construction for supporting the ceiling without the need for separate finishing work for supporting non-structural elements of the ceiling, simply by installing the deck plate during construction, and to a deck plate for construction using the same. The insert (3000) for a deck plate according to the present invention comprises: a traction member (3100) having one end formed in a straight or hook shape and the other end formed with a male screw portion (3110) of a certain length; an upper washer (3200) inserted along the side of the male screw portion of the traction member for a certain length and positioned on the upper side of the deck plate (10); a fifth gasket (3300) inserted along the side of the male screw portion of the traction member and positioned between the upper washer (3200) and the upper surface of the deck plate (10); a tightening nut (3400) fastened to the male screw portion of the traction member and fastened while applying pressure toward the lower surface of the deck plate (10); and a circular O-ring seating groove (3420) formed to a certain depth larger than the diameter of the female screw portion (3410) formed at the axis center of the tightening nut. It includes an O-ring (3500) that is sealed in the direction of the outer surface of the tightening nut when fastened with the tightening nut (3400).

Description

Technology Field

[0001] The present invention relates to a deck plate for construction, and more specifically, to an insert for a deck plate and a deck plate for construction using the same, which enables fastening construction for ceiling support finishing without the need for separate finishing work for supporting non-structural elements (MEP; Mechanical, Electric, Plumbing) for the ceiling, by only installing the deck plate during construction, and also satisfies the technical requirements of the relevant building code and the building importance coefficient of the non-structural elements while having the same support load as the building, while minimizing construction interference while satisfying the construction requirements of various types of work in the construction of non-structural elements, thereby making the construction of the building simple and convenient and resulting in excellent constructability. Background Technology

[0003] Generally, a deck plate refers to a slab material manufactured by processing a metal plate, such as galvanized steel, so that it is used as a substitute for formwork in forming building slabs and can form a structure without being dismantled even after concrete is poured.

[0004] Constructing slab structures using the aforementioned deck plates eliminates the need for formwork for concrete slab work and minimizes on-site rebar placement, thereby reducing the time and costs associated with temporary construction and rebar placement. Furthermore, since construction is accomplished simply by continuously mounting and fixing unit products, work can be carried out quickly and easily. Additionally, using factory-produced products ensures high-quality rebar placement. For these reasons, there has been a recent increasing trend of constructing slab structures using such deck plates. They are particularly widely used in steel-framed and reinforced concrete buildings.

[0005] As disclosed in the prior art of Korean Patent Publication No. 10-1078789, titled "Prefabricated Deck Plate for Construction and Method of Installing the Same," when a deck plate is not for structural use but for formwork, it must be used with tension reinforcement bars.

[0006] Furthermore, even when the deck plate possesses sufficient rigidity to replace tensile reinforcement, additional tensile reinforcement is installed because the deck plate is installed exposed beneath the slab and thus has not received fire resistance certification.

[0007] Therefore, tensile reinforcement is separately installed on the deck plate, and slab concrete is poured to complete the slab construction.

[0008] Such tensile reinforcement work increases construction costs and requires a long construction period; furthermore, if the skill level of the workers is not guaranteed, construction quality may significantly decline, potentially leading to a decrease in structural strength.

[0009] In addition, the deck plate described in the prior art of Patent Publication No. 10-1078789 is manufactured as a single unit by bending a single plate to form the ridges and valleys together. Since the deck plate described in the prior art of Patent Publication No. 10-1078789 is a single unit in which the ridges and valleys are formed together, there is a problem in that it does not accurately correspond to the spacing between beams, such as leaving a gap next to the last deck plate or the last deck plate being crumpled and damaged after installation according to the spacing between beams.

[0010] To resolve such problems, Patent Publication No. 10-1078789 is disclosed, comprising: an upper plate having the shape of a rectangular plate laid flat, and side plates having the shape of the upper plate with both sides bent downward at an acute angle, wherein the upper plate fastening part is formed integrally at the lower end of the side plates; and a lower plate having the shape of a rectangular plate laid flat overall, wherein a groove-shaped lower plate fastening part formed by folding both ends is formed so that the upper plate fastening part of the upper plate can be inserted and fastened diagonally from top to bottom, and a truss girder is joined in the longitudinal direction at the center of the upper part.

[0011] In addition, the side plate is bent downward at an acute angle one or more times, and multiple protrusions that reinforce the bond with concrete are formed on either or both the top plate and the side plate of the top plate.

[0012] Therefore, since truss girders can be installed and used as structural deck plates, there is no need to place additional tensile reinforcement. Consequently, reinforcement work is omitted, resulting in lower construction costs and time. Furthermore, construction quality is maintained regardless of the skill level of the workers, ensuring structural safety. Additionally, since the upper and lower plates are prefabricated separately and assembled on-site, the weight of individual members is reduced, making construction more convenient. Moreover, because the upper and lower plates are separately prefabricated to the desired size, there is no gap left next to the last installed deck plate regardless of the spacing between beams, and the last deck plate is protected from creasing and damage.

[0013] However, this conventional patent publication No. 10-1078789 had a problem in that it frequently caused schedule interference due to the post-construction of non-structural building elements by construction type and site for supporting the ceiling, and required not only finishing but also supplementation to have a supporting load to satisfy the building importance coefficient, while also lacking standardization that could minimize the construction of various non-structural building elements without construction interference, shorten the construction process, minimize costs, and ensure safety during construction.

[0015] References: Korean Patent Publication No. 10-1078789, Title of Invention "Prefabricated Deck Plate for Construction and Method of Installing the Same". The problem to be solved

[0017] The present invention was devised to resolve the above-mentioned problems, and aims to provide an insert for a deck plate and a deck plate for construction using the same, which enables fastening construction for ceiling support finishing without the need for separate finishing work for supporting non-structural elements (MEP; Mechanical, Electric, Plumbing) for the ceiling, simply by constructing the deck plate during construction. Furthermore, it is integrated with the building slab to satisfy the technical requirements of the relevant building code and the building importance coefficient of the non-structural elements, while having the same support load as the building. Additionally, it satisfies the construction requirements of various types of work during the construction of non-structural elements and minimizes construction interference, thereby making the construction of the building simple and convenient and providing excellent constructability. means of solving the problem

[0019] An insert for a deck plate, which is another embodiment of the present invention, is a deck plate insert mounted in a through hole formed in a deck plate, comprising: a traction member having one end formed in a straight or hook shape and the other end having a male threaded portion formed therein; an upper washer fitted toward the side of the traction member having the male threaded portion formed therein and positioned on the upper part of the deck plate; an upper gasket fitted toward the side of the traction member having the male threaded portion formed therein and positioned on the upper washer and the upper part of the deck plate; a tightening nut fastened to the male threaded portion of the traction member and fastened while applying pressure toward the lower surface of the deck plate; and an O-ring seated in a circular O-ring seating groove formed to a certain depth and larger than the diameter of the female threaded portion formed at the axis center of the tightening nut, wherein the O-ring expands radially in the circular O-ring seating groove upon tightening the tightening nut to seal the gap between the outer surface of the tightening nut and the deck plate, and the upper gasket and the O-ring deform in different directions to form a double sealing structure It is characterized by being formed to maintain a sealed state even if construction errors or deformation of the deck plate occur, and to prevent the slurry from leaking out downwards when pouring concrete.

[0020] Here, an anti-loosening female screw formed to face in the direction of the axial center at a predetermined position on the outer surface of the tightening nut is provided, and a viewing window opening formed to face in the direction of the axial center at the lower part of the anti-loosening female screw is provided so that the interior can be inspected to confirm that a threaded bolt, etc., is fastened.

[0021] In addition, a retaining ring groove is formed at the end of the male screw portion of the traction member, and a retaining ring is assembled in the retaining ring groove to restrict movement with the upper washer.

[0022] The architectural deck plate of the present invention is characterized by having the above-described deck plate insert assembled thereon.

[0023] The architectural deck plate of the present invention further comprises a sealing means comprising: a hole-closing bolt having a male threaded portion inserted into a hole at the upper part of the deck plate and protruding downward by a certain length, and a gasket seating portion expanded in a sealed state at the upper part of the male threaded portion to press a gasket; a sixth gasket inserted into the male threaded portion of the hole-closing bolt and positioned between the lower surface of the gasket seating portion and the upper surface of the deck plate; a seventh gasket inserted into the male threaded portion of the hole-closing bolt and in close contact with the lower surface of the deck plate; and a nut member fastened to the male threaded portion to press the seventh gasket upward. Effects of the invention

[0025] As described above, according to the insert for a deck plate and the architectural deck plate using the same according to the present invention, when constructing, fastening construction for supporting the ceiling is possible without performing separate finishing work for supporting non-structural elements (MEP; Mechanical, Electric, Plumbing) for the ceiling, even with only the construction of the deck plate. Furthermore, it is integrated with the slab of the building to satisfy the technical requirements under the relevant building code and the building importance coefficient of the non-structural elements, while having the same supporting load as the building. At the same time, it is possible to minimize construction interference while satisfying the construction requirements of various types of work in the construction of non-structural elements, thereby making the construction of the building simple and convenient and resulting in excellent constructability. Brief explanation of the drawing

[0027] FIG. 1 is a perspective view showing an insert for a deck plate according to one embodiment of the present invention, and FIG. 2 is a front view of FIG. 1, FIG. 3 is a left side view of FIG. 1, FIG. 4 is a cross-sectional view along line A-A of FIG. 3, FIG. 5 is an exploded perspective view of FIG. 1, FIG. 6 is an explanatory diagram showing a state in which a deck plate insert according to the first embodiment of the present invention is assembled to a building deck plate. FIG. 7 is a perspective view showing an insert for a deck plate according to a second embodiment of the present invention, and FIG. 8 is a side view of FIG. 7, FIG. 9 is a cross-sectional view along line B-B of FIG. 8, FIG. 10 is an exploded perspective view of FIG. 7. FIG. 11 is an explanatory diagram showing the state in which the deck plate insert of FIG. 7 is assembled to a building deck plate. FIG. 12 is an explanatory diagram showing the state in which an insert for a deck plate according to the third embodiment of the present invention is assembled to a deck plate for construction. FIG. 13 is an explanatory diagram illustrating a sealing means used in a building deck plate of the present invention. Specific details for implementing the invention

[0028] Hereinafter, an insert for a deck plate according to an embodiment of the present invention and a deck plate for construction using the same will be described in detail with reference to the attached drawings.

[0029] In applying reference numerals to the components of the above drawings, identical components are assigned the same reference numeral whenever possible, even if they are shown in different drawings; furthermore, detailed descriptions of known functions and configurations that are deemed to unnecessarily obscure the essence of the invention are omitted. Additionally, directional terms such as 'upper,' 'lower,' 'front,' 'rear,' 'forehead,' 'forward,' and 'rear end' are used in relation to the orientation of the disclosed drawings(s). Since the components of the embodiments of the invention can be positioned in various orientations, directional terms are used for illustrative purposes only and are not intended to be limiting.

[0030] An insert (1000) for a deck plate according to one embodiment of the present invention includes a traction member (1100), a coupler body (1200), an upper washer (1300), a first gasket (1400), a second gasket (1500), and a nut (1600), as shown in FIGS. 1 to 6.

[0031] Here, the above-mentioned traction member (1100) is formed in the shape of a steel bar of a certain length, with one end formed in a straight shape (for welding) or a hook shape and the other end formed in a straight shape.

[0032] Accordingly, as shown in FIG. 6, a deck plate for construction is configured such that it can be towed by being hooked onto the upper transverse member (21) of the truss girder (20), or as shown in FIG. 11 which will be described later, the upper part of the I-shaped towing member (1100) is welded to the lower part of the transverse member so that the lower part is towed.

[0033] In addition, the above-mentioned coupler body (1200) has a towing member fitting groove (1210) formed so that the towing member (1100) is fitted and assembled along one central axis direction for a certain length, and a female screw (1220) of a certain length is formed along the other central axis direction, while the outer surface has a larger diameter on the side where the towing member (1100) is assembled and the outer surface that is fitted into the hole (11) formed in the deck plate (10) is formed with a stepped length with a diameter smaller than the outer surface where the towing member is assembled, and a male screw portion (1230) is formed on the outer surface.

[0034] Accordingly, when the lower end of the traction member (1100) is fixed in a state where it is fitted into the traction member fitting groove (1210), and the upper washer (1300), the first gasket (1400), the deck plate (10), the second gasket (1500), and the nut (1600) are sequentially fastened so that a construction deck plate is installed on the ceiling, an anchor can be simply assembled to the female screw (1220), so that post-construction of non-structural elements for construction by type of work and site for supporting the ceiling part at the bottom can be easily carried out.

[0035] Additionally, the upper washer (1300) is fitted toward the side where the male screw portion (1230) of the coupler body (1200) is formed, and is seated on the stepped side so as to be positioned on the upper part of the deck plate (10).

[0036] Accordingly, the upper washer (1300) is fitted toward the side where the male screw portion (1230) of the coupler body (1200) is formed and is seated on the stepped side, thereby stably supporting the upper surface of the first gasket (1400) that is fitted into the male screw portion (1230).

[0037] Meanwhile, the first and second gaskets (1400, 1500) have an H-shaped cross-section, and the first gasket (1400) is fitted toward the side where the male screw portion (1230) of the coupler body is formed and is positioned between the upper washer (1300) and the upper surface of the deck plate (10), and is fitted toward the side where the male screw portion (1230) of the coupler body (1200) is formed and is in close contact with the lower surface of the deck plate (10).

[0038] Therefore, when the first and second gaskets (1400, 1500) are installed as shown in FIG. 6 and concrete is poured, the water used to cure the concrete is prevented from flowing downward by the first and second gaskets (1400, 1500), and the cross-section is formed in an H shape so that it can be stably attached to the panel.

[0039] Additionally, the nut (1600) is formed with a female screw (1610) formed at the axis center to press the second gasket (1500) from the lower surface while being fastened to the male screw portion (1230) of the coupler body (1200), an anti-loosening screw portion (1620) formed through the female screw (1610) at a predetermined position on the outer surface, and a hexagonal head portion (1630) formed at a certain height on the lower outer surface to facilitate rotation with a tool.

[0040] Accordingly, the female screw (1610) is fastened to the male screw portion (1230) of the coupler body (1200) so as to be assembled to press the second gasket (1500) from the lower surface, and the nut (1600) is prevented from loosening from the male screw portion (1230) by means of an unillustrated anti-loosening screw fastened to the anti-loosening screw portion (1620), while the nut (1600) is easily locked and separated from the male screw portion (1230) of the coupler body (1200) by means of the hexagonal head portion (1630).

[0041] Additionally, it is preferable that the lower surface of the upper washer (1300) is provided with a gasket receiving portion (1310) that surrounds the first gasket (1400), and the upper surface of the nut (1600) is provided with a gasket receiving portion (1640) that surrounds the second gasket (1500).

[0042] Accordingly, the outer surface of the first and second gaskets (1400, 1500) is stably supported at the axis center of the male screw portion (1230) of the coupler body (1200) by the above gasket receiving portion (1310, 1640), and assembly is performed.

[0043] Hereinafter, a second embodiment of the present invention is described with reference to FIGS. 7 to 11, and redundant descriptions regarding configurations identical to those in the first embodiment are omitted.

[0044] An insert (2000) for a deck plate according to a second embodiment of the present invention comprises: a traction member (2100) having one end formed in a straight or hook shape and the other end having a male screw portion (2110) of a certain length formed therein; an upper washer (2200) inserted for a certain length toward the side where the male screw portion of the traction member is formed and positioned on the upper side of the deck plate (10); a third gasket (2300) inserted toward the side where the male screw portion of the traction member is formed and positioned between the upper washer (2200) and the upper surface of the deck plate (10); a fourth gasket (2400) inserted toward the side where the male screw portion of the traction member is formed and positioned in close contact with the lower surface of the deck plate (10); a lower washer (2500) inserted toward the side where the male screw portion of the traction member is formed and positioned in close contact with the lower surface of the fourth gasket (2400); and the It includes an inclined tightening ring (2600) that is fitted toward the side where the male screw portion of the traction member is formed, and has a jaw chuck portion (2610) so that one end is in close contact with the lower surface of the lower washer (2500) and the other end is deformed inward when pressure is applied from the outer surface, thereby applying pressure to the male screw portion (2110); and a tightening nut (2700) that has a female screw (2710) at the axis center fastened toward the side where the male screw portion of the traction member is formed, and has a tightening inclined groove (2720) at the axis center of one end so that the inclined surface of the inclined tightening ring (2600) can be gradually pressed.

[0045] Accordingly, as shown in FIG. 11, the upper part of the traction member (2100) can be welded to the upper transverse member (21) of the truss girder (20) or hooked onto the upper transverse member (21) of the truss girder (20) to be tractioned, thereby maintaining a high traction force, and through the male threaded part (2110) of the traction member (2100), the upper washer (2200) and the third gasket (2300) are positioned on the upper part of the deck plate (10), and the fourth gasket (2400) and the lower washer (2500) are positioned on the lower part of the deck plate (10), so that the inclined tightening ring (2600) is fitted and the coupler nut (2700) is fastened, thereby pressing the jaw chuck part (2610), in which the tightening inclined groove (2720) is formed on the lower part of the inclined tightening ring (2600), with the axial center. Since the inner diameter of the jaw chuck (2610) is pressed against the male thread (2110) of the traction member (2100) and assembled, when the deck plate (10) is placed in a building and concrete is poured up to a certain height on the outer surface of the coupler nut (2700), an anchor is assembled to the female thread (2710) of the coupler nut (2700), thereby allowing for simple post-construction of non-structural building elements for supporting the ceiling section at the bottom of the deck plate (10) according to construction type and site.

[0046] Here, the lower surface of the upper washer (2200) is provided with a gasket receiving portion (2210) that surrounds the third gasket (2300), and the upper surface of the lower washer (2500) is provided with a gasket receiving portion (2510) that surrounds the fourth gasket (2400).

[0047] Accordingly, the outer surface of the third and fourth gaskets (2300, 2400) is stably supported at the axis center of the traction member (2100) by the above gasket receiving portion (2210, 2510), and assembly is performed.

[0048] And a stop ring groove (2120) is formed at the end of the male screw portion (2110) of the above-mentioned traction member (2100), and a stop ring (2800) is assembled in the stop ring groove (2120) so that the upper washer (2200) can be stably supported so as not to move upward in the axial direction.

[0049] In addition, it is preferable that the outer surface of the tightening nut (2700) be in the shape of a hexagonal column.

[0050] FIG. 13 is for illustrating the third embodiment of the present invention, and redundant descriptions regarding configurations identical to those in the first and second embodiments are omitted.

[0051] An insert (3000) for a deck plate according to the third embodiment of the present invention comprises: a traction member (3100) having one end formed in a straight or hook shape and the other end formed with a male screw portion (3110) of a certain length; an upper washer (3200) inserted for a certain length toward the side where the male screw portion of the traction member is formed and positioned on the upper part of the deck plate (10); a fifth gasket (3300), which is an upper gasket inserted toward the side where the male screw portion of the traction member is formed and positioned between the upper washer (3200) and the upper surface of the deck plate (10); a tightening nut (3400) fastened to the male screw portion of the traction member and fastened while applying pressure toward the lower surface of the deck plate (10); and a female screw portion (3410) formed at the axis center of the tightening nut, formed to a certain depth larger than the diameter of the female screw portion. It includes an O-ring (3500) that is seated in a circular O-ring seating groove (3420) and is sealed in the direction of the outer surface of the tightening nut when fastened with a tightening nut (3400).

[0052] Accordingly, as shown in FIG. 12, the upper part of the traction member (3100) is hooked onto the upper transverse member (21) of the truss girder (20) in a hook shape to be tractioned, or welded to be tractioned to maintain high traction force, and through the male threaded part (3110) of the traction member (3100), the upper washer (3200) and the upper gasket, which is the fifth gasket (3300), are positioned on the upper part of the deck plate (10), and the O-ring (3500) is fitted into the male threaded part (3110) and positioned on the upper part of the deck plate (10). Then, the tightening nut (3400) is fastened to the male threaded part (3110) so that the upper part of the tightening nut (3400) presses against the lower surface of the deck plate (10), and when the construction is completed by pouring concrete, the female threaded part (3410) of the tightening nut (3400) By assembling anchors, post-construction of non-structural elements for supporting the ceiling section on the lower part of the deck plate (10) can be easily performed according to the type of construction and site.

[0053] That is, the O-ring (3500) expands radially in the circular O-ring seating groove (3420) in accordance with the tightening of the tightening nut (3400) to seal the gap between the outer surface of the tightening nut (3400) and the deck plate (10), and the upper gasket (3300) and the O-ring (3500) deform in different directions to form a double sealing structure, thereby maintaining a sealed state even if construction errors or deformation of the deck plate occur, and preventing the slurry from leaking downward during concrete pouring.

[0054] Here, an anti-loosening female screw (3430) is formed so as to be directed toward the axial center at a predetermined position on the outer surface of the tightening nut (3400), and a viewing window hole (3440) is formed so as to be directed toward the axial center at the lower part of the anti-loosening female screw (3430) to allow checking of the interior and confirming that a threaded bolt, etc., is fastened.

[0055] Therefore, by fastening a fastening screw not shown on the above anti-loosening female screw (3430), the tightening nut (3400) can be further prevented from loosening from the male screw portion (3110), and it is also easy to check whether the threaded bolt, etc. is properly fastened through the above viewing window hole (3440).

[0056] In addition, a stop ring groove (3120) is formed at the end of the male screw portion (3110) of the traction member (3100), and a stop ring (3600) is assembled in the stop ring groove (3120).

[0057] Therefore, the upper washer (3200) can be supported so as not to move axially upward by the stop ring (3600) assembled in the stop ring groove (3120).

[0058] Meanwhile, FIG. 13 illustrates an example in which a sealing means (4000) is installed to seal a hole (11) formed in a building deck plate (10) of the present invention when not needed. The sealing means includes a hole sealing bolt (4100) having a male threaded portion (4110) inserted into the hole (11) from the upper part of the deck plate (10) and protruding downward for a certain length, and a gasket seating portion (4120) that is expanded in a sealed state on the upper part of the male threaded portion to surround a gasket; a sixth gasket (4200) having a cross-section H-shaped that is inserted into the male threaded portion (4110) of the hole sealing bolt (4100) and positioned between the lower surface of the gasket seating portion (4120) and the upper surface of the deck plate (10); and a sealing means that is inserted into the male threaded portion (4110) of the hole sealing bolt (4100) and adheres to the lower surface of the deck plate (10). It consists of a seventh gasket (4300) with an H-shaped cross section and a nut member (4400) that is fastened to the male screw portion (4110) and pressurizes the seventh gasket (4300) while wrapping around it from the top.

[0059] Accordingly, in the location where a hole (11) is formed in the above-mentioned architectural deck plate (10) and the deck plate insert (1000, 2000, 3000) of the present invention is not installed, a sealing means (4000) consisting of the hole sealing bolt (4100), the 6th and 7th gaskets (4200, 4300), and a nut member (4400) is assembled before pouring concrete, and the construction can be easily carried out by pouring concrete.

[0060] The embodiments of the present invention described above and illustrated in the drawings should not be interpreted as limiting the technical scope of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and a person skilled in the art may modify and change the technical scope of the present invention in various forms. Therefore, such modifications and changes will fall within the scope of protection of the present invention if they are obvious to a person skilled in the art. Explanation of the symbols

[0062] 10: Deck plate 11: Hole 1000, 2000, 3000: Inserts for deck plates 1100,2100,3100: Towing member 1200: Coupler body 1210: Towing component insertion groove 1220: Female thread 1230: Male screw thread 1300, 2200, 3200: Upper washer 1310,1640,2210,2510: Gasket receiving part 1400: 1st gasket 1500: 2nd gasket 1600: Nut 2300: Third gasket 2400: 4th gasket 2500: Bottom washer 2600: Inclined tightening ring 2700: Coupler nut 2800: Stop ring 3300: 5th gasket 3400: Tightening nut 3430: Anti-loosening female screw 3440: View window opening 3500: O-ring 3600: Stop ring 4000: Blocking means

Claims

Claim 1 A deck plate insert mounted in a through hole formed in a deck plate comprises: a traction member (3100) having one end formed in a straight or hook shape and the other end having a male threaded portion (3110) formed therein; an upper washer (3200) fitted toward the side of the traction member where the male threaded portion is formed and positioned on the upper side of the deck plate (10); an upper gasket (3300) fitted toward the side of the traction member where the male threaded portion is formed and positioned on the upper side of the upper washer (3200) and the deck plate (10); a tightening nut (3400) fastened to the male threaded portion of the traction member and fastened while applying pressure toward the lower surface of the deck plate (10); and an O-ring (3500) seated in a circular O-ring seating groove (3420) formed to a certain depth and larger than the diameter of the female threaded portion (3410) formed at the axis center of the tightening nut. An insert for a deck plate characterized in that the O-ring (3500) expands radially in the circular O-ring seating groove (3420) upon tightening the tightening nut (3400) to seal the gap between the outer surface of the tightening nut (3400) and the deck plate (10), and the upper gasket (3300) and the O-ring (3500) deform in different directions to form a double sealing structure, thereby maintaining a sealed state even if construction errors or deformation of the deck plate occur, and preventing the slurry from leaking downward during concrete pouring. Claim 2 An insert for a deck plate according to claim 1, characterized in that it is provided with an anti-loosening female screw (3430) formed to face in the direction of the axial center at a predetermined position on the outer surface of the tightening nut (3400), and a viewing window hole (3440) formed to face in the direction of the axial center at the lower part of the anti-loosening female screw (3430) so as to be able to check the inside to confirm that a threaded bolt, etc., is fastened. Claim 3 An insert for a deck plate according to claim 1 or 2, wherein a retaining ring groove (3120) is formed at the end portion of the male thread portion (3110) of the traction member (3100), and a retaining ring (3600) is assembled in the retaining ring groove (3120) to restrict movement with the upper washer (3200). Claim 4 A building deck plate comprising an insert for a deck plate comprising any one of claims 1 to 3, Claim 5 In claim 4, a hole-closing bolt (4100) is provided with a male threaded portion (4110) inserted into a hole (11) at the top of the deck plate (10) and protruding downward by a certain length, and a gasket seating portion (4120) is provided on the upper part of the male threaded portion, which is expanded in a sealed state and has a gasket in close contact with it; a sixth gasket (4200) inserted into the male threaded portion (4110) of the hole-closing bolt (4100) and positioned between the lower surface of the gasket seating portion (4120) and the upper surface of the deck plate (10); a seventh gasket (4300) inserted into the male threaded portion (4110) of the hole-closing bolt (4100) and in close contact with the lower surface of the deck plate (10); and a device fastened to the male threaded portion (4110) to press the seventh gasket (4300). A building deck plate characterized by further including a sealing means (4000) made of a nut member (4400),

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