JP5447116B2 - Steel structure floor panel, steel structure floor panel joint structure and steel structure floor assembly - Google Patents

Description

The present invention, thin lightweight shape steel concrete (steel house) floor panels for steel structure containing relates bed sets of the bonding structure and steel structure of the steel structure for floor panels, it is possible to easily laying of the floor panel, also The floor space can be set freely and the floor panel can easily secure the horizontal rigidity of the floor.

  Thin steel lightweight steel construction (steel house) is composed of a frame and a load-bearing panel consisting of a thin steel lightweight steel with a thickness of around 1 mm and a face material attached to one side. Compared to wooden framed wall structure, there is no aging change such as drying shrinkage, warping, twisting, etc., so there is no worry that the building will deteriorate over time or squeak noise will occur. It is also known for its advantages such as light weight and excellent workability.

  In addition, since the cross-sectional performance of thin lightweight steel used for the frame material is smaller than that of ordinary lightweight steel (lightweight H-shaped steel, etc.), heavy H-shaped steel is used for floor beams and floor joists on the second floor and above. By using it, the floor span and floor joists are made long span, and free floor plans are realized. In this case, the horizontal rigidity is ensured by installing a brace separately (Patent Documents 1 and 2).

  By the way, in the realization of a skeleton infill house by the method of separating the building skeleton (building frame such as pillars, beams, floors, etc.) and infill (interior, equipment, etc.), it is generally adopted in the wooden frame wall construction method. It is preferable to have a structure in which horizontal rigidity is secured by a floor surface material (floor panel).

  For example, Patent Document 3 and Patent Document 4 disclose an example of a wooden structure that secures the horizontal rigidity of a floor using a floor material, but the wooden structure is attached as a part of a floor panel. Since the floor joists can be joined to the end joists perpendicular to the floor joists by a method such as oblique nailing, there is no particular problem in securing the horizontal rigidity of the floor using the floor surface material.

JP2006-307483 JP2003-147861 Japanese Patent Laid-Open No. 3-140541 Japanese Patent Laid-Open No. 3-140542

  However, floor beams and joists made of H-shaped steel are usually connected by joints such as bolt joints or drill screw joints, so that a structure that secures horizontal rigidity using floor materials is used. When trying to apply to steel structures such as construction, (part of) H-shaped steel is attached to the floor panel in advance, so joining of the H-shaped steels was very poor in workability.

  For example, when joining the edge part of H-section steel attached to a floor panel as floor joist to the side part of H-section steel as end joist orthogonal to the floor joist, it is T type (other than L type and 7 In order to join the floor joists and end joist webs together, it is necessary to lay the floor panel and then attach the joint hardware to look up from the bottom of the floor panel. In addition, it was necessary to carry out in a small space.

  On the other hand, if you try to lay the floor panel after attaching the joint metal to either the floor joist or the end joist, if you lift the floor panel and simply lower it from directly above, the H-shaped steel of the floor panel and the joint metal will interfere. Therefore, it is necessary to install the floor panel by shifting from the side of the original position to the original position, and the installation of the floor panel is troublesome.

  In addition, the method of increasing the span of floor beams and floor joists by using heavy H-shaped steel for floor beams and floor joists on the second floor and above is the same for each member of heavy H-shaped steel installed as floor beams and floor joists. Therefore, the number of man-hours is increased compared to general steel house panel construction, and if braces are installed separately to ensure horizontal rigidity, extra field work is required and costs are reduced. There was a problem such as swelling.

The present invention has been made in order to solve the above-described problems, and can easily lay a floor panel, can perform a free floor plan by a long span, and can further improve the floor by a floor material. It is an object of the present invention to provide a steel structure floor panel, a steel structure floor panel joint structure, and a steel structure floor assembly capable of easily ensuring horizontal rigidity.

The floor panel for steel structure according to claim 1, wherein the floor panel for steel structure includes a floor joist made of lightweight steel, and the end of the floor joist is on the side of the end joist disposed substantially at right angles to the floor joist. A fixed portion that is attached to a side portion of the web of the end joist by a joining bolt , and protrudes from a side of the floor joist web to the side portion of the floor joist web from the fixing portion . It is joined by a joint hardware comprising a connecting portion to be attached, and the ends of the floor joist web and the lower flange do not interfere with the joint portion of the joint hardware at the end portion to which the joint hardware is attached. and enough to ensure a working space required for the fastening of the fastening bolt, from the upper flange by forming obliquely from the front end of the upper flange in the distal direction of the connection portion of the joint fittings And it is characterized in that is Kuna'.

  According to the present invention, a floor panel to be laid later can be laid from directly above a floor panel laid first, and according to the present invention, the floor panel to be laid later can be installed under a floor joist. Because the flange is shorter than the upper flange, the joint metal is attached to the end joist of the floor panel laid first or the end joist placed ahead of the floor panel, and laid from the back next. Even if the floor panel to be laid is hung from directly above, etc., the connecting part of the joint hardware does not interfere with the floor joist to be laid later, so it is easy to lay the floor panel next to the floor panel previously laid Can be laid.

  In this case, as a means for shortening the lower flange of the H-shaped steel as the floor joist, the H-shaped steel may be cut to a predetermined length and then the lower flange (near) may be further cut. Alternatively, when the H-shaped steel is cut to a predetermined length, if it is cut obliquely (approximately at an angle of about 60 °) from the upper flange to the lower flange, the lower flange can be shortened by one cutting. It is possible and desirable.

  The joining structure of the floor panel for steel structure of Claim 2 is the joining structure of the floor panel provided with the floor joist which consists of light weight shape steel, and the floor panel provided with the end joist made of light weight shape steel, The end is joined to the side of the end joist via a joint metal, and the joint hardware projects from the fixed part attached to the side of the web of the end joist and the side of the floor joist web from the fixed part. And a lower flange of the floor joist is formed so as not to interfere with the connecting portion at an end portion to which the joint metal fitting is attached. It is characterized by being shorter.

  The present invention enables the floor panel to be laid from right above the floor panel laid next to the floor panel, so that the floor panel can be laid easily and efficiently, and the floor surface. The horizontal rigidity of the floor can be easily secured by the material.

  According to the present invention, the lower flange of the floor joist of the floor panel to be laid later is shorter than the upper flange, so that the joint hardware is attached to the side of the end joist of the floor panel laid earlier, Even if a floor panel to be laid next is laid from directly above, the connecting portion of the joint hardware does not interfere with the floor joist to be laid later, so that the floor panel can be laid very easily and efficiently. . In addition, since the floor panel can be easily laid in this manner, the horizontal rigidity of the floor can be easily secured by using the floor panel. Moreover, it is not necessary to install a brace etc. separately.

The steel structure floor panel joining structure according to claim 3 is a joining structure of a floor panel having a floor joist made of light-weight shaped steel and an end joist made of light-weight shaped steel arranged substantially at right angles to the floor joist. The end of the floor joist is joined to the side of the end joist via a joint metal, and the joint metal is attached to the side of the web of the end joist by a joining bolt and the fixed part from the fixed part. The floor joist web is protruded from the side and is composed of a connecting portion attached to the side of the floor joist web by a joining bolt , and the end of the floor joist web and the lower flange is the joint hardware. to the extent not to interfere with the connecting portion of the joint hardware at its end is attached, and to the extent that can secure the work space required for tightening of the fastening bolt, the connecting portion of the joint hardware from the tip of the upper flange And it is characterized in that it is shorter than the top flange by forming obliquely to the edge direction.

  The present invention enables a floor panel to be laid easily and efficiently by dropping a floor panel laid later from between the joists that have been laid earlier from above. The floor material can easily secure the horizontal rigidity of the floor.

  According to the present invention, the lower flange of the floor joist of the floor panel laid later is shorter than the upper flange, so that each of the end joists laid in parallel first is attached with a joint metal piece, Even if the floor panel to be laid later is dropped from the top in the meantime, the connecting part of the joint hardware does not interfere with the floor joist to be laid later, so the floor panel should be laid very easily and efficiently. Can do. In addition, since the floor panel can be easily laid in this manner, the horizontal rigidity of the floor can be easily secured by using the floor panel. Moreover, it is not necessary to install a brace etc. separately.

  The steel structure floor panel joint structure according to claim 4 is the steel structure floor panel joint structure according to claim 2 or 3, wherein the end of the floor joist is connected to the joint of the joint hardware from the tip of the upper flange. It is formed obliquely in the tip direction.

  The present invention is such that a notch required for the end of the lower flange of the floor joist can be easily provided, and the end of the floor joist is inclined from the tip of the upper flange to the tip of the connecting portion of the joint hardware. By cutting the floor joist into a predetermined length, the lower flange of the floor joist is shortened by a necessary length. In this case, it is preferable that the end of the floor joist be cut obliquely at an angle of about 60 ° because a work space necessary for tightening the joining bolt can be secured.

  The steel structure floor panel joint structure according to claim 5 is the steel structure floor panel joint structure according to any one of claims 2 to 4, wherein the light weight steel is a light H-section steel or a light groove steel. It is characterized by being.

  Lightweight H-shaped steel and lightweight grooved steel are most commonly used and can be easily obtained. In addition, lightweight H-section steel and lightweight groove-shaped steel have a larger cross-sectional performance than that of thin steel plate lightweight section steel, and therefore it is possible to realize a free floor plan by making the floor joists have a longer span.

  The steel structure floor assembly according to claim 6 is composed of a floor panel having a floor joist made of lightweight steel and a floor panel having an end joist made of light weight steel, and the end of the floor joist is Joined to the side of the end joist through a joint metal, the joint hardware is fixed to the side of the web of the end joist and the side of the floor joist web from the fixed part, And the bottom flange of the floor joist is shorter than the upper flange to the extent that it does not interfere with the connection portion at the end to which the joint metal fitting is attached. It is characterized by becoming.

  The present invention makes it possible to lay a floor panel to be laid from the upper side next to the floor panel laid earlier so that the floor panel can be laid easily and efficiently. This makes it possible to easily secure the horizontal rigidity of the floor using materials.

  According to the present invention, the lower flange of the floor joist of the floor panel to be laid later is shorter than the upper flange, so that the joint hardware is attached to the side of the end joist of the floor panel laid earlier, Even if a floor panel laid next to the floor panel is laid from directly above, the connecting part of the joint hardware does not interfere with the floor joists of the floor panel laid later, so the rear panel is laid next to the floor panel laid first. It is possible to easily lay a floor panel to be laid from above.

  In addition, since the floor panel can be laid in this way, the horizontal rigidity of the floor can be easily secured by using the floor material, and there is no need to separately install braces.

The steel structure floor assembly according to claim 7, comprising: a floor joist made of light-weight shaped steel laid substantially in parallel; and a plurality of floor panels comprising floor joists made of light-weight shaped steel laid between the end joists The end of the floor joist is joined to the side of the end joist via a joint metal, and the joint hardware is attached to the side of the web of the end joist by a joint bolt and the fixing part. The floor joist web is protruded from a fixed portion and is connected to a side portion of the floor joist web by a joining bolt , and the floor joist web and the end of the lower flange. The connection part of the joint metal from the tip of the upper flange to the extent that it does not interfere with the connection part of the joint metal at the end to which the joint metal is attached and to the extent that the work space necessary for tightening the joint bolt can be secured. of And it is characterized in that it is shorter than the top flange by forming obliquely to the edge direction.

  The present invention makes it possible to lay a floor panel that is laid later between the edge joists that have been laid down from above, so that the floor panel can be laid easily and efficiently. The floor material is used to easily secure the horizontal rigidity of the floor.

  In the present invention, the floor flange of the floor panel to be laid later is shorter than the upper flange, and the end joist of the floor panel laid first or the end joist placed before the floor panel is joined to the metal fitting. Even if a floor panel to be laid later is laid from directly above, the joint of the joint hardware will not interfere with the floor joists of the floor panel to be laid later. It can be done very easily and efficiently.

  Further, since the floor panel can be easily laid in this manner, the horizontal rigidity of the floor can be easily secured by using the floor material, and there is no need to separately install a brace or the like.

  In addition, the floor joists and end joists on the second floor and above are made of lightweight steel having a larger cross-sectional performance than the thin steel lightweight steel.

The joint part of the floor panel provided with the edge joist which consists of lightweight H-section steel, and the floor panel which comprises the floor joist which consists of lightweight H-section steel is shown, (a) is the partial top view, (b) is (a) FIG. The joint part of the floor panel provided with the edge joist which consists of lightweight H-section steel, and the floor panel which comprises the floor joist which consists of lightweight H-section steel is shown, (a) is the partial top view, (b) is (a) FIG. It is an exploded top view which shows the arrangement | positioning form of the floor panel which shows the floor set of steel structure. FIG. 4 is an exploded perspective view of the steel structure floor set illustrated in FIG. 3. It is an exploded top view which shows the arrangement | positioning form of the floor panel which shows the floor set of steel structure. FIG. 6 is an exploded perspective view of the steel structure floor set illustrated in FIG. 5. It is sectional drawing which shows the laminated | stacked floor panel.

  FIGS. 1A and 1B show examples of joints between floor panels laid adjacent to each other in a steel structure floor set. In the figure, reference numerals 1 and 2 are floor panels configured by attaching a face material 5 on a frame material composed of a plurality of floor joists 3 or a plurality of floor joists 3 and end joists 4, and in particular Lightweight H-section steel is used for the floor joists 3 and end joists 4, and structural plywood is used for the face members 5.

  The floor joists 3 and end joists 4 of the floor panels 1 and 2 are assigned based on the size of the structural plywood, the floor joists 3 are arranged at equal intervals, and the end joists 4 are both ends or one end of the floor joists 3. Are arranged at right angles to the floor joists 3 and joined to each other by drill screw joining or the like. Further, the face material 5 is attached to the floor joist 3 or the floor joist 3 and the end joist 4 by drill screw joining or the like.

  The floor panel 1 and the floor panel 2 thus configured are laid adjacent to each other, and the end of each floor joist 3 of the floor panel 2 is abutted against the side of the end joist 4 of the floor panel 1, and both One end 5 a of the face material 5 is abutted with each other on the central axis on the end joist 4 of the floor panel 1. And the edge part of the web 3a of the floor joist 3 is joined to the side part of the web 4a of the edge joist 4 by the some joining bolt 7 via the joining metal object 6. FIG.

  The metal joint 6 protrudes from the fixing part 6a attached to the side part of the web 4a of the end joist 4 with a plurality of joining bolts 7 and the side part of the web 3a of the floor joist 3 from the fixing part 6a. Are formed in a T-shape, an L-shape, or a 7-shape when viewed in plan view from the connection portion 6 b attached by a plurality of connection bolts 7.

  Further, the end of the floor joist 3 is formed obliquely from the tip of the upper flange 3b to the lower flange 3c in the direction of the tip of the connecting portion 6b of the metal joint 6. Thereby, the front-end | tip part of the lower flange 3c of the floor joist 3 is shorter than the connection part 6b compared with the upper flange 3b.

  In addition, when the H-section steel as the floor joist 3 is cut into a predetermined length, such a shape of the tip can be easily formed by cutting obliquely with respect to the flange. The angle of cutting depends on the length of the connecting portion 6b and the web 3b of the floor joist 3 (H-section steel), but may be about 60 °.

  In such a configuration, since the lower flange 3b of the floor joist 3 of the floor panel 2 is shortened, the floor panel 1 is laid first, and the joint metal 6 is attached to the side of the web 4a of the end joist 4 of the floor panel 1. Since the tip of the floor joist 3 does not interfere with the connecting portion 6b of the joint hardware 6 even if the floor panel 2 is lowered from the top and laid next to the floor panel 1 after that, Floor panels can be laid very efficiently and easily.

  Further, since the floor panel can be laid in this way, the horizontal rigidity of the floor can be easily ensured by using the floor material.

  2 (a) and 2 (b) show another example of the joint between the floor joist and the floor panel, and the tips of the web 3a and the lower flange 3c of the floor joist 3 are cut almost to the minimum necessary, The lower flange 3c is shortened.

  In this case, the H-section steel as the floor joist 3 is once cut into a predetermined length and then obliquely inclined from the portion near the lower flange 3c at the tip of the web 3a to the lower flange 3c (in FIG. 2B, approximately 15 °). Is cut at an angle).

  3 and 4 show an example of a steel structure floor set. In the figure, a plurality of floor panels 1 and 2 are laid adjacent to each other, and the adjacent floor panels 1 and 2, the floor panels 1 and the floor panels 2 are joined to each other.

  In particular, the floor panel 1 and the floor panel 2 are joined by a plurality of joining bolts 7 via joining hardware 6 as shown in FIGS. 1 (a) and 1 (b).

  The floor panel 1 has a face member 5 mounted on a frame member composed of a plurality of floor joists 3 arranged at equal intervals and end joists 4 arranged at substantially right angles to the floor joists 3 at both longitudinal ends thereof. It is constituted by.

  Further, the floor panel 2 has a surface on a frame member made up of a plurality of floor joists 3 arranged at equal intervals and an end joist 4 arranged substantially at right angles to the floor joists 3 at one end in the longitudinal direction thereof. It is configured by attaching the material 5.

  Further, the lower flange 3c of each floor joist 3 is shorter than the upper flange 3b to the extent that it does not interfere with the connecting portion 6b of the joint fitting 6 at the tip end portion to which the joint fitting 6 is attached.

  Furthermore, at the joint B between each floor panel 1 and each floor panel 2, the end of each floor joist 3 of the floor panel 2 is abutted against the side of the end joist 4 of the floor panel 1, and each floor joist 3 The tip of the web 3a is joined to the side portion of the web 4a by a plurality of joining bolts 7 with the joining hardware 6 interposed therebetween.

  In addition, in the joint C between the floor panels 1 and the joint D between the floor panels 2, the ends of both end joists 4 are abutted with each other, and the tips of both webs 4a are joined to each other. They are joined by joint bolts (not shown) through (not shown).

  In this case, if the lower flange 4 of the floor panel 4 to be laid later is shorter than the upper flange as much as necessary at the end portion on the joining side, the edge joist 4 of the floor panel laid earlier is required. Even if a joining plate is attached to the end of the floor and a floor panel to be laid later is laid from directly above, the floor joist 4 of the floor panel to be laid later does not interfere with the floor panel. Can be easily laid.

  In this case, the lower flange of the end joist 4 can also be made shorter than the upper flange by cutting obliquely in the same manner as the lower flange 3c of the floor joist 3.

  Furthermore, one end 5a of the face material 5 of the floor panel 1 to be laid later is the face material 5 of the floor panel 1 previously laid on the central axis on the floor joists 3 of the floor panel 1 previously laid. Is attached to the floor joist 3 by drill screw joining.

  Similarly, one end 5a of the face member 5 of the floor panel 2 to be laid later is flush with one end 5a of the face member 5 of the floor panel 2 previously laid, and the floor laid first. It is attached on the floor joist 3 of the panel 2 by drill screw joining or the like.

  In the configuration as described above, the lower flange 3c of the floor joist 3 of the floor panel 2 is shorter than the upper flange 3b to the extent that it does not interfere with the connecting portion 6b of the joint fitting 6 at the tip portion to which the joint fitting 6 is attached. Thus, the floor panel 1 is laid first, the connecting metal 6 is attached to the side of the web 4a of the end joist 4 of the floor panel 1, and then the floor panel 2 is placed on the side of the floor panel 1 from directly above. Even when suspended and laid, the tip of the floor joist 3 does not interfere with the metal fitting 6, so that the floor panels 1 and 2 can be laid very efficiently and easily.

  In addition, since the floor panel can be laid in this manner, the horizontal rigidity of the floor can be easily secured using the floor panel.

  5 and 6 show another example of a steel structure floor set. In the figure, a plurality of floor panels 1 and 2 are laid adjacent to each other in the longitudinal direction of the end joists 4 between the end joists 4 and 4, respectively. The both sides are arranged adjacent to each other.

  The end joists 4 and 4 are laid in parallel as a part of the frame of the structure prior to the installation of the floor panels 1 and 2. As the joist 4, a light H-section steel or a light groove steel is used.

  The floor panels 1 and 2 are joined to the end joists 4 and 4, and the adjacent floor panels 1 and the floor panels 2 are joined to each other.

  The floor panel 1 and the floor panel 2 are each configured by attaching a face material 5 on a plurality of floor joists 3 arranged at equal intervals. Further, both ends of the floor joists 3 of the floor panels 1 and 2 are abutted against the side portions of the end joists 4, and the ends of the webs 3a of the floor joists 3 are connected to the side portions of the webs 4a via the joint hardware 6, Joined by the joining bolt 7.

  In addition, at the joint E between the floor panels 1, one end 5a of the face material 5 of the floor panel 1 to be laid later is first on the center line on the floor joist 3 of the floor panel 1 laid first. It is abutted flush with one end 5a of the face material 5 of the laid floor panel 1 and attached to the floor joist 3 by drill screw joining.

  Similarly, in the joint F between the floor panels 2, one end 5 a of the face material 5 of the floor panel 2 laid later is flush with one end 5 a of the face material 5 of the floor panel 2 laid earlier. And attached to the floor joists 3 by drill screw joining.

  In the configuration as described above, the lower flange 3c of the floor joist 3 of the floor panel 1 and the floor panel 2 is shorter than the upper flange 3b so as not to interfere with the connecting portion 6b of the joint fitting 6 at the tip portion to which the joint fitting 6 is attached. As a result, the end joists 4 are laid first, the joint metal 6 is attached to the side of the web 4a of the end joists 4, and the floor panels 1, 2 are then placed between the end joists 4, 4 respectively. Even if it is laid down from just above, the end of the floor joist 3 does not interfere with the joint hardware 6, so that the floor panels 1 and 2 can be laid very efficiently and easily. Further, since the floor panel can be laid in this way, the horizontal rigidity of the floor can be easily ensured by using the floor material.

  Comparing the embodiment of FIGS. 3 and 4 with the embodiment of FIGS. 5 and 6, in the embodiment of FIGS. 3 and 4, the end joists 4 are also constructed by installing the floor panels 1 and 2, so the process is simplified. ing.

  On the other hand, in the embodiment of FIGS. 5 and 6, the end joist 4 can be made of a single H-shaped steel or the like as long as it can carry a public road, and the floor panel can be formed as shown in FIG. Since they are stacked, transportation efficiency is excellent.

  According to the present invention, the floor panel can be efficiently laid, and the horizontal rigidity of the floor can be easily secured by the floor panel.

DESCRIPTION OF SYMBOLS 1 Floor panel 2 Floor panel 3 Floor joist 3a Web 3b Upper flange 3c Lower flange 4 End joist 4a Web 5 Face material 5a One end of face material 6 Joint metal fitting 6a Fixing part 6b Connection part 7 Joint bolt

Claims (7)

In a steel structure floor panel comprising a floor joist made of lightweight section steel, the end of the floor joist is on the side of the end joist arranged substantially at right angles to the floor joist and on the side of the web of the end joist projecting from the web side of the floor joists from the fixed portion and the fixed portion attached by a fastening bolt, and is joined by bonding hardware consisting of a connecting portion attached by the floor joists of the web side to the fastening bolt The floor joist web and the end of the lower flange have a working space necessary for tightening the joining bolt to the extent that the end to which the joining hardware is attached does not interfere with the joint of the joining hardware. enough to ensure, steel, characterized in that it is shorter than the top flange by forming obliquely from the front end of the upper flange in the distal direction of the connection portion of the joint hardware configuration Use floor panel.   In a joint structure of a floor panel having a floor joist made of lightweight section steel and a floor panel having an end joist made of lightweight section steel arranged substantially at right angles to the floor joist, the end of the floor joist is Joined to the side of the end joist through a joint metal, the joint metal is fixed to the side of the web of the end joist and is fixed to the side of the floor joist web from the fixed part, The bottom flange of the floor joist is configured so as not to interfere with the joint of the joint metal at the end to which the joint metal is attached. A steel structure floor panel joint structure characterized by being shortened. In a joining structure of a floor panel having a floor joist made of lightweight section steel and an end joist made of lightweight section steel arranged substantially at right angles to the floor joist, the end of the floor joist is a side part of the end joist The joint metal is connected to a side portion of the floor joist web by a fixing portion that is attached to a side portion of the end joist web by a joining bolt and the fixing portion. It is composed of a connecting portion attached to the webs of side by fastening bolt, and an end portion of the web and the lower flange of the floor joists does not interfere with the connecting portion of the joint hardware at its end the joining hardware is attached upper flange to the extent, and enough to ensure a working space required for the fastening of the fastening bolt, by forming obliquely from the front end of the upper flange in the distal direction of the connection portion of the joint fittings Bonding of the steel structural floor panels, characterized in that the shorter Ri.   4. The steel structure floor panel joint structure according to claim 2, wherein the end of the floor joist is formed obliquely from the top end of the upper flange to the front end of the joint of the joint hardware. Bonding structure for structural floor panels.   The steel structure floor panel joint structure according to any one of claims 2 to 4, wherein the light-weight shaped steel is a light H-section steel or a light-duty groove-shaped steel. .   It consists of a floor panel with a floor joist made of lightweight section steel and a floor panel with an end joist made of lightweight section steel, and the end of the floor joist is joined to the side of the end joist via a joint hardware The joint hardware is fixed to the side of the web of the floor joist, and is fixed to the side of the web of the floor joist from the fixed part. And a lower flange of the floor joist is shorter than an upper flange to the extent that the lower flange of the floor joist does not interfere with the connection portion of the connection hardware at the end to which the connection hardware is attached. Construction floor assembly. It is composed of end joists made of lightweight section steel laid substantially in parallel, and a plurality of floor panels provided with floor joists made of lightweight section steel laid between the end joists, and the ends of the floor joists are Joined to the side of the end joist via a joint metal, the joint metal is fixed to the side of the web of the end joist by a joining bolt and from the fixed part to the side of the floor joist web And a connecting portion attached to a side portion of the floor joist web by a joining bolt , and an end portion of the floor joist web and a lower flange is the end portion to which the joining hardware is attached. to the extent not to interfere with the connecting portion of the joint hardware, and to the extent that can secure the work space required for tightening of the fastening bolt, to form obliquely from the front end of the upper flange in the distal direction of the connection portion of the joint fittings Floor assembly of a steel structure, characterized in that is shorter than the top flange Ri.

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