Steel Waterproof Load-Bearing Structure

Abstract

A load-supporting unit, a steel waterproof load-supporting structure equipped with the same, and a roof waterproofing method using the load-supporting unit are disclosed. The load-supporting unit of the present invention is configured to support a load applied to the steel frame of a steel waterproofing panel by being coupled to a steel waterproofing panel that is formed of a steel material and provides a waterproofing function, and a steel frame formed integrally within the steel frame during press processing of the steel frame and arranged in contact with the rooftop floor to provide a thermal insulation function between the steel frame and the outside air, thereby preventing the central part of the steel frame from sinking and deforming; the load-supporting unit comprises a unit plate arranged in contact with the rooftop; and a frame supporter, one end of which is fixed to the upper surface of the unit plate and the other end of which is inserted toward the thermal insulation to support the lower surface of the steel frame.

Description

Technology Field

[0001] The present invention relates to a steel waterproof load-supporting structure, and more specifically, to a load-supporting unit, a steel waterproof load-supporting structure equipped with the same, and a roof waterproofing method using the load-supporting unit, which can prevent the shortening of the lifespan by ensuring that deformation such as the central part sinking as in the past does not occur even when pressed by a load or as aging progresses, and can increase construction convenience and prevent unit price increases so as to secure competitiveness by allowing easy work to be done on-site during roof waterproofing construction. Background Technology

[0002] Since building rooftops are typically constructed of concrete, waterproofing is inevitably required. Previously, a common method involved mixing waterproofing powder and mortar to apply as a plastering layer to the floor, followed by the application of waterproofing paint.

[0003] However, if rooftop waterproofing is applied in this manner, the waterproofing layer may swell or burst over time due to differences in elongation rates caused by seasonal changes, humidity, and temperature fluctuations. Consequently, if moisture seeps into the concrete within the waterproofing layer, the concrete may corrode or oxidize, causing the waterproofing to fail and ultimately shortening the building's lifespan.

[0004] Accordingly, as a measure to improve upon these conventional construction methods, a method of manufacturing specific steel waterproofing panels and placing them on the rooftops of buildings has recently been applied.

[0005] Steel waterproofing panels are made as a single unit by inserting insulation into the bottom of the panel when pressing square metal materials. These steel waterproofing panels are installed so that the insulation part is positioned on the floor side of the roof, and the metal part forms the part that is stepped on.

[0006] However, conventional steel waterproof panels have insulation placed at the bottom of the metal material through press processing, so they cannot properly support the load due to load or impact, and as the insulation is compressed over time, the center of the panel sinks toward the roof floor.

[0007] Considering that the length of one side of a panel is typically 60 to 120 cm, if the center of the panel sinks, water will inevitably accumulate in the sunken area, which can affect the waterproofing lifespan.

[0008] Of course, to solve these disadvantages, one could consider manufacturing the panel as a single unit by adding a structure that prevents the central part from being compressed when manufacturing the panel, that is, when press-forming the metal material with insulation material. However, considering that manufacturing it as a single unit by adding the aforementioned structure is not technically easy and even if it were possible, the production cost would inevitably increase, there is a need for a new concept of steel waterproof load-bearing structure that improves upon these disadvantages. Prior art literature

[0009] Korean Intellectual Property Office Application No. 10-2016-0083786 Korean Intellectual Property Office Application No. 10-2016-0172923 The problem to be solved

[0010] The objective of the present invention is to provide a load-supporting unit, a steel waterproofing load-supporting structure equipped with the same, and a rooftop waterproofing method using the load-supporting unit, which can prevent the shortening of the lifespan by ensuring that deformation such as the central part sinking as in the past does not occur even when compressed by a load or as aging progresses, and can increase construction convenience and secure competitiveness by preventing an increase in unit costs as work can be easily performed on-site during rooftop waterproofing construction. means of solving the problem

[0011] The above objective is achieved by a load-supporting unit characterized by comprising: a unit plate positioned in contact with the rooftop to support a load applied to the steel frame of a steel waterproofing panel, which is coupled to the steel waterproofing panel having a steel frame formed of a metal material and providing a waterproofing function, and an insulating material integrally formed within the steel frame during press processing of the steel frame and positioned in contact with the rooftop floor to provide an insulating function between the steel frame and the outside air, thereby preventing the central part of the steel frame from sinking and deforming; and a frame supporter, one end of which is fixed to the upper surface of the unit plate and the other end of which is inserted toward the insulating material to support the lower surface of the steel frame.

[0012] The above objective is also achieved by a steel waterproofing load-supporting structure characterized by comprising: a steel frame formed of a metal material and providing a waterproofing function; a steel waterproofing panel having an insulating material integrally formed within the steel frame during press processing of the steel frame and positioned in contact with the rooftop floor to provide a thermal insulation function between the steel frame and the outside air; and a load-supporting unit coupled to the steel waterproofing panel and supporting a load applied to the steel frame of the steel waterproofing panel so as to prevent the central part of the steel frame from sinking and deforming.

[0013] The above steel frame comprises: an upper surface platform portion forming a platform; a first skirt portion bent to intersect the upper surface platform portion at one end region of the upper surface platform portion; a first flange portion positioned parallel to the upper surface platform portion at the end of the first skirt portion and constructed to be in contact with the rooftop; a second skirt portion formed to intersect the upper surface platform portion at the other end region of the upper surface platform portion and having a shorter length than the first skirt portion; and a second flange portion positioned parallel to the upper surface platform portion at the end of the second skirt portion and positioned in contact with the upper surface of the first flange portion of an adjacent steel frame, wherein the insulation material is integrally positioned in the space formed between the upper surface platform portion, the first and second skirt portions, and the first and second flange portions, and the load-supporting unit comprises a unit plate formed on one side of the first flange portion of the steel frame and positioned to be in contact with the rooftop. and may include a frame supporter, one end of which is fixed to the upper surface of the unit plate and the other end of which is inserted into the insulation material side to support the lower surface of the steel frame.

[0014] The above objective is achieved by: a steel waterproofing panel preparation step comprising a steel frame formed of a metal material and providing a waterproofing function, and an insulating material integrally formed within the steel frame during press processing of the steel frame and positioned in contact with the rooftop floor to provide a thermal insulation function between the steel panel and the outside air; a load supporting unit preparation step comprising a unit plate positioned in contact with the rooftop, and a frame supporter having one end fixed to the upper surface of the unit plate and the other end inserted into the insulating material to support the lower surface of the steel frame; a steel waterproofing load supporting structure field fabrication step comprising assembling the load supporting unit to the steel waterproofing panel so that the frame supporter of the load supporting unit is inserted into the insulating material of the steel waterproofing panel to fabricate the steel waterproofing load supporting structure on-site; and a steel waterproofing load supporting structure construction step comprising constructing the steel waterproofing load supporting structures by connecting them laterally. This is also achieved by a rooftop waterproofing method using a load-supporting unit, characterized by including a connection area waterproofing finishing step for waterproofing the connection areas of the above-mentioned steel waterproof load-supporting structures constructed thereon. Effects of the invention

[0015] According to the present invention, even if it is pressed by a load or deteriorates, deformation such as the central part sinking as in the past is prevented, thereby preventing the lifespan from being shortened. Furthermore, since it can be easily worked on-site during rooftop waterproofing construction, it can increase construction convenience and prevent an increase in unit costs, thus securing competitiveness. Brief explanation of the drawing

[0016] FIG. 1 is a schematic construction diagram of a steel waterproof load-bearing structure according to the first embodiment of the present invention. Figure 2 is an enlarged view of the steel waterproof load-bearing structure shown in Figure 1. Figure 3 is a drawing showing the load supporting unit separated from Figure 2. Fig. 4 is a perspective view of Fig. 3. Figure 5 is an enlarged perspective view of a load supporting unit. Figure 6 is a plan view of Figure 5. FIG. 7 is a flowchart of a rooftop waterproofing method using a load-supporting unit according to the first embodiment of the present invention. FIG. 8 is a perspective view of a load supporting unit applied to a steel waterproof load-supporting structure according to a second embodiment of the present invention. FIG. 9 is a perspective view of a load supporting unit applied to a steel waterproof load-supporting structure according to a third embodiment of the present invention. FIG. 10 is a perspective view of a load supporting unit applied to a steel waterproof load-supporting structure according to the fourth embodiment of the present invention. FIG. 11 is a flowchart of a rooftop waterproofing method using a load-supporting unit according to the fifth embodiment of the present invention. Specific details for implementing the invention

[0017] Below, with reference to the attached drawings, embodiments of the present invention are described in detail so that those skilled in the art can easily implement the invention. However, since the description of the present invention is merely an example for structural or functional explanation, the scope of the present invention should not be interpreted as being limited by the embodiments described in the text. That is, since the embodiments are subject to various modifications and may take various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical concept. Furthermore, the objectives or effects presented in the present invention do not imply that a specific embodiment must include all of them or only such effects; therefore, the scope of the present invention should not be understood as being limited by them.

[0018] The meaning of the terms described in this invention should be understood as follows.

[0019] When it is stated that one component is "connected" to another component, it should be understood that it may be directly connected to that other component, or that there may be other components in between. Conversely, when it is stated that one component is "directly connected" to another component, it should be understood that there are no other components in between. Meanwhile, other expressions describing the relationships between components, such as "between" and "exactly between," or "adjacent to" and "directly adjacent to," should be interpreted in the same way.

[0020] A singular expression should be understood to include a plural expression unless the context clearly indicates otherwise, and terms such as "include" or "have" are intended to specify the existence of the set-up features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood not to preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0021] Unless otherwise defined, all terms used herein have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having meanings consistent with the context of the relevant technology and should not be interpreted as having an ideal or overly formal meaning unless explicitly defined in this invention.

[0022] Now, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the embodiments, the same reference numerals are assigned to identical components.

[0023] FIG. 1 is a schematic construction diagram of a steel waterproof load-supporting structure according to a first embodiment of the present invention, FIG. 2 is an enlarged view of the steel waterproof load-supporting structure shown in FIG. 1, FIG. 3 is a drawing showing the load-supporting unit separated from FIG. 2, FIG. 4 is a perspective view of FIG. 3, FIG. 5 is an enlarged perspective view of the load-supporting unit, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is a flowchart of a rooftop waterproofing method using the load-supporting unit according to a first embodiment of the present invention.

[0024] Referring to these drawings, the present invention prevents the shortening of the lifespan by ensuring that deformation, such as the central part sinking as in the past, does not occur even when compressed by a load or as aging progresses. Furthermore, since the work can be easily performed on-site during rooftop waterproofing construction, it increases construction convenience and prevents an increase in unit costs, thereby ensuring competitiveness.

[0025] The scope of the present invention, which can provide such effects, may be applied to a load supporting unit (140) as shown in FIGS. 5 and 6, a steel waterproof load supporting structure (100) equipped with a load supporting unit (140) as shown in FIGS. 1 to 4, and a rooftop waterproofing method using a load supporting unit (140) as shown in FIG. 7.

[0026] Regarding the steel waterproof load-bearing structure (100), the steel waterproof load-bearing structure (100) is a means for waterproofing construction on a rooftop as shown in Fig. 1. It has a superior waterproofing effect compared to conventional waterproofing construction where paint is simply applied to the rooftop.

[0027] This steel waterproof load-supporting structure (100) mainly comprises a steel waterproof panel (110) and a load-supporting unit (140). The load-supporting unit (140) is assembled to the steel waterproof panel (110) on-site for use. Therefore, it offers great convenience in use.

[0028] The steel waterproof panel (110) includes a steel frame (120) and an insulating material (130). These are formed integrally by press forming.

[0029] The steel frame (120) is formed from a metal (steel) material and provides a waterproof function. The steel frame (120) can be easily manufactured by press processing.

[0030] The steel frame (120) includes an upper platform portion (121) forming a platform, a first skirt portion (122) that is bent to intersect the upper platform portion (121) at one end of the upper platform portion (121), a first flange portion (123) that is positioned parallel to the upper platform portion (121) at the end of the first skirt portion (122) and constructed to be in contact with the rooftop, a second skirt portion (124) that is bent to intersect the upper platform portion (121) at the other end of the upper platform portion (121) and is formed to be shorter in length than the first skirt portion (122), and a second flange portion (125) that is positioned parallel to the upper platform portion (121) at the end of the second skirt portion (124) and is positioned in contact with the upper surface of the first flange portion (123) of the adjacent steel frame (120).

[0031] As shown in Fig. 1, since the steel waterproof panels (110) must be constructed by connecting them laterally, the lengths of the first and second skirt sections (122, 124) are different. Of course, the widths of the first and second flange sections (123, 125) may be the same or different.

[0032] The insulation material (130) is integrally formed within the steel frame (120) during the press processing of the steel frame (120) and is positioned in contact with the rooftop floor to provide insulation between it and the outside air. That is, the insulation material (130) is integrally placed in the space formed between the upper surface footrest (121), the first and second skirt sections (122, 124), and the first and second flange sections (123, 125). For example, after placing the insulation material (130) on the steel plate, when the shape of the steel frame (120) is formed by press processing, the insulation material (130) can be integrally housed inside it.

[0033] The load supporting unit (140) is attached to the steel waterproof panel (110) and serves to support the load applied to the steel frame (120) of the steel waterproof panel (110) so as to prevent the central part of the steel frame (120) from sinking and deforming.

[0034] Meanwhile, as briefly mentioned earlier, in the case of the steel waterproof panel (110), the insulation material (130) that is not rigid is placed inside the steel frame (120), so due to load or impact, and as time passes, the insulation material (130) is compressed, so it cannot properly support the load, and the central part of the steel waterproof panel (110) sinks toward the floor of the roof.

[0035] As such, if the central part of the steel waterproof panel (110) sinks, water will inevitably accumulate in the sunken part, which may affect the waterproof lifespan.

[0036] To solve these disadvantages, one could consider manufacturing the steel waterproof panel (110) as a single unit by adding a structure (not shown) that prevents the central part from being pressed, but manufacturing it as a single unit by adding the structure is not technically easy, and even if it were possible, the production cost would inevitably increase.

[0037] Therefore, in this embodiment, a load-supporting unit (140), which is a separate component from the steel waterproof panel (110), is manufactured so that a worker can attach the load-supporting unit (140) to the steel waterproof panel (110) for use on-site during construction. In this case, not only is the cost of manufacturing the steel waterproof panel (110) not increased, but various disadvantages such as the manufacturing process becoming complicated can also be overcome.

[0038] As described above, the load supporting unit (140) supports the central part of the steel waterproof panel (110) to prevent the central part of the steel waterproof panel (110) from sinking and deforming.

[0039] This load-supporting unit (140) includes a unit plate (141) that is positioned to be in contact with the rooftop, forming a surface with the first flange portion (123) of the steel frame (120), and a frame supporter (142) that has one end fixed to the upper surface of the unit plate (141) and the other end inserted toward the insulation material (130) to support the lower surface of the steel frame (120). The diameter of the unit plate (141) may be approximately 12 to 16 cm and the height of the frame supporter (142) may be approximately 1.4 to 2.0 cm, but the scope of the present invention is not limited to these values.

[0040] In this embodiment, the frame supporter (142) is arranged in multiple numbers based on a center point and is equipped with supporter wings (142a) that can be easily inserted into the insulation material (130). At this time, there are four supporter wings (142a) in the shape of a cross. Of course, there is no need for the supporter wings (142a) to be exactly four, so the scope of the invention is not limited to the shape of the drawing.

[0041] The load supporting unit (140) may be made of metal or plastic. Therefore, the scope of the present invention is not limited to the material of the load supporting unit (140).

[0042] Meanwhile, a rooftop waterproofing method for waterproofing a rooftop using a steel waterproof load-supporting structure (100) includes a steel waterproofing panel preparation step (S110), a load-supporting unit preparation step (S120), a steel waterproofing load-supporting structure on-site fabrication step (S130), a steel waterproofing load-supporting structure construction step (S140), and a connection part waterproofing finishing step (S150).

[0043] The steel waterproof panel preparation step (S110) is a process of preparing a steel waterproof panel (110) that includes a steel frame (120) formed of a metal (steel) material and providing a waterproofing function, as illustrated in FIGS. 1 to 4, and an insulating material (130) that is integrally formed within the steel frame (120) during press processing of the steel frame (120) and is placed in contact with the rooftop floor to provide an insulating function between the steel waterproof panel and the outside air. The steel waterproof panel (110) can be manufactured in advance at a factory and then transported to the site.

[0044] The load supporting unit preparation step (S120) is a process of preparing a load supporting unit (140) having a unit plate (141) positioned in contact with the rooftop as illustrated in FIGS. 1 to 6, and a frame supporter (142) having one end fixed to the upper surface of the unit plate (141) and the other end inserted toward the insulation material (130) to support the lower surface of the steel frame (120). The load supporting unit (140) can also be manufactured in advance at a factory and then transported to the site. It does not matter which step the steel waterproofing panel preparation step (S110) and the load supporting unit preparation step (S120) are performed first.

[0045] The on-site production step (S130) of the steel waterproof load-supporting structure is a process of producing the steel waterproof load-supporting structure (100) on-site by assembling the load-supporting unit (140) to the steel waterproof panel (110) so that the frame supporter (142) of the load-supporting unit (140) is inserted into the insulation material (130) of the steel waterproof panel (110). In this way, the steel waterproof load-supporting structure (100) can be produced on-site without the need to go through the trouble of manufacturing an integrated structure with the load-supporting unit (140) pre-inserted in a factory, which is advantageous for cost reduction.

[0046] The steel waterproof load-bearing structure construction step (S140) is a process of constructing the steel waterproof load-bearing structures (100) by connecting them laterally as in Fig. 1, and the connection area waterproofing finishing step (S150) is a process of waterproofing the connection area of ​​the constructed steel waterproof load-bearing structures (100).

[0047] With this configuration, the steel waterproof panel (110) and the load supporting unit (140) are manufactured in advance at the factory and then transported to the site. After assembling them at the site to form a steel waterproof load supporting structure (100), the roof construction can be completed simply by connecting them laterally as shown in Fig. 1.

[0048] According to the present embodiment, which operates based on the structure described above, the lifespan can be prevented by ensuring that deformation such as the central part sinking does not occur as in the past, even if it is pressed down by a load or deteriorates. Additionally, since the work can be easily performed on-site during rooftop waterproofing construction, construction convenience can be increased, and unit costs can be prevented, thereby securing competitiveness.

[0049] FIG. 8 is a perspective view of a load supporting unit applied to a steel waterproof load-supporting structure according to a second embodiment of the present invention.

[0050] Referring to this drawing, the load supporting unit (240) of the present embodiment also includes a unit plate (241) and a frame supporter (242).

[0051] In addition, the frame supporter (242) is provided with multiple supporter wings (242a) arranged based on a center point and easily inserted into the insulation material (130, see FIG. 3). At this time, the upper portions of the supporter wings (242a) form a blade (242b) in which the cross-sectional area gradually narrows toward the end. When the blade (242b) is formed in this way, there is an advantage that it can be easily inserted into the insulation material (130, see FIG. 3).

[0052] Even when this embodiment is applied, the lifespan can be prevented by ensuring that deformation such as the central part sinking does not occur as in the past, even if it is pressed down by a load or deteriorates. Additionally, since the work can be easily performed on-site during rooftop waterproofing construction, construction convenience can be increased, and unit costs can be prevented, thereby securing competitiveness.

[0053] FIG. 9 is a perspective view of a load supporting unit applied to a steel waterproof load-supporting structure according to a third embodiment of the present invention.

[0054] Referring to this drawing, the load supporting unit (340) of the present embodiment also includes a unit plate (341) and a frame supporter (342).

[0055] In this embodiment, the frame supporter (342) forms a plurality of rod structures arranged at equal intervals on the unit plate (341).

[0056] Even when this embodiment is applied, the lifespan can be prevented by ensuring that deformation such as the central part sinking does not occur as in the past, even if it is pressed down by a load or deteriorates. Additionally, since the work can be easily performed on-site during rooftop waterproofing construction, construction convenience can be increased, and unit costs can be prevented, thereby securing competitiveness.

[0057] FIG. 10 is a perspective view of a load supporting unit applied to a steel waterproof load-supporting structure according to the fourth embodiment of the present invention.

[0058] Referring to this drawing, the load supporting unit (440) of the present embodiment is almost similar to the third embodiment. That is, it includes a unit plate (441) and a frame supporter (442a). The frame supporters (442a) form a plurality of rod structures arranged at equal intervals on the unit plate (441).

[0059] Meanwhile, a conical frame supporter (442b) with a sharp end is placed between the frame supports (442a). The conical frame supporter (442b) serves to guide the insulation material (130, see FIG. 3) so that it can be easily inserted into it.

[0060] Even when this embodiment is applied, the lifespan can be prevented by ensuring that deformation such as the central part sinking does not occur as in the past, even if it is pressed down by a load or deteriorates. Additionally, since the work can be easily performed on-site during rooftop waterproofing construction, construction convenience can be increased, and unit costs can be prevented, thereby securing competitiveness.

[0061] FIG. 11 is a flowchart of a rooftop waterproofing method using a load-supporting unit according to the fifth embodiment of the present invention.

[0062] Referring to this drawing, the rooftop waterproofing method according to the present embodiment is substantially the same as the first embodiment. That is, the rooftop waterproofing method according to the present embodiment includes a steel waterproofing panel preparation step (S110), a load-supporting unit preparation step (S120), a steel waterproofing load-supporting structure on-site fabrication step (S130), a steel waterproofing load-supporting structure construction step (S140), and a connection area waterproofing finishing step (S150).

[0063] However, in the case of this embodiment, an adhesive application step (S135) is added between the on-site fabrication step (S130) of the steel waterproof load-bearing structure and the construction step (S140) of the steel waterproof load-bearing structure.

[0064] The adhesive application step (S135) is a process of applying adhesive to the unit plate (141) of the load supporting unit (140) that forms the steel waterproof load supporting structure (100) made on-site. When adhesive is applied to the lower part of the unit plate (141), this part becomes attached to the rooftop, thereby preventing the constructed steel waterproof load supporting structure (100) from being pushed around arbitrarily.

[0065] Even when this embodiment is applied, the lifespan can be prevented by ensuring that deformation such as the central part sinking does not occur as in the past, even if it is pressed down by a load or deteriorates. Additionally, since the work can be easily performed on-site during rooftop waterproofing construction, construction convenience can be increased, and unit costs can be prevented, thereby securing competitiveness.

[0066] As such, the present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention. Accordingly, such modifications or variations should be deemed to fall within the scope of the claims of the present invention. Explanation of the symbols

[0067] 100 : Steel waterproof load-bearing structure 110 : Steel waterproof panel 120 : Steel frame 121 : Top footrest 122: 1st skirt section 123: 1st flange section 124: Second skirt section 125: Second flange section 130 : Insulation 140 : Load-supporting unit 141 : Unit Plate 142 : Frame Supporter

Claims

Claim 1 A steel waterproof panel (110) comprising a steel frame (120) formed of a metal material and providing a waterproof function, and an insulating material (130) integrally formed within the steel frame (120) during press processing of the steel frame (120) and positioned in contact with the rooftop floor to provide an insulating function between the outside air; A steel waterproofing load-supporting structure (100) comprising: a load-supporting unit (140) that is coupled to the steel waterproofing panel (110) and supports the load applied to the steel frame (120) of the steel waterproofing panel (110) so as to prevent the central part of the steel frame (120) from sinking and deforming; wherein the load-supporting unit (140) is coupled to the steel waterproofing panel (110) which is formed of a steel material and provides a waterproofing function, and has an insulating material (130) that is integrally formed within the steel frame (120) during press processing of the steel frame (120) and is positioned in contact with the rooftop floor to provide an insulating function between the steel frame (120) and the outside air, and supports the load applied to the steel frame (120) of the steel waterproofing panel (110) so as to prevent the central part of the steel frame (120) from sinking and deforming; and wherein the unit positioned in contact with the rooftop. A steel waterproof load-bearing structure characterized by comprising: a plate (141); and a frame supporter (142) having one end fixed to the upper surface of the unit plate (141) and the other end inserted into the insulation material (130) to support the lower surface of the steel frame (120). Claim 2 delete Claim 3 In claim 1, the steel frame comprises: an upper surface platform portion forming a platform; a first skirt portion bent to intersect the upper surface platform portion at one end area of ​​the upper surface platform portion; a first flange portion positioned parallel to the upper surface platform portion at the end of the first skirt portion and constructed to be in contact with the rooftop; a second skirt portion formed to intersect the upper surface platform portion at the other end area of ​​the upper surface platform portion and having a shorter length than the first skirt portion; and a second flange portion positioned parallel to the upper surface platform portion at the end of the second skirt portion and positioned in contact with the upper surface of the first flange portion of an adjacent steel frame, wherein the insulation material is integrally positioned in the space formed between the upper surface platform portion, the first and second skirt portions, and the first and second flange portions, and the load supporting unit comprises a unit plate formed on one side of the first flange portion of the steel frame and positioned to be in contact with the rooftop. A steel waterproof load-bearing structure characterized by including a frame supporter, one end of which is fixed to the upper surface of the unit plate and the other end of which is inserted into the insulation material to support the lower surface of the steel frame. Claim 4 A method for constructing a steel waterproof load-bearing structure according to claim 1, comprising: a steel waterproof panel preparation step of preparing a steel waterproof panel having a steel frame formed of a metal (steel) material and providing a waterproofing function, and an insulating material integrally formed within the steel frame during press processing of the steel frame and positioned in contact with the rooftop floor to provide an insulating function between the steel waterproof panel and the outside air; a load-supporting unit preparation step of preparing a load-supporting unit having a unit plate positioned in contact with the rooftop, and a frame supporter having one end fixed to the upper surface of the unit plate and the other end inserted into the insulating material to support the lower surface of the steel frame; a steel waterproof load-bearing structure on-site fabrication step of assembling the load-supporting unit to the steel waterproof panel so that the frame supporter of the load-supporting unit is inserted into the insulating material of the steel waterproof panel; and a steel waterproof load-bearing structure construction step of constructing the steel waterproof load-bearing structures by connecting them laterally. A rooftop waterproofing method using a load-supporting unit, characterized by including a connection area waterproofing finishing step for waterproofing the connection area of ​​the above-mentioned steel waterproof load-supporting structures constructed thereon.

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