JP7601311B2 - How to construct a steel ceiling structure - Google Patents

Description

The present invention relates to a method for constructing a ceiling substructure that is constructed under a floor slab.

The ceiling of a building may be constructed with a double ceiling in consideration of wiring space for lighting, etc. In a double ceiling structure, a ceiling base is constructed under the floor slab of the upper floor, and a ceiling material (such as gypsum board) is attached to the ceiling base. As disclosed in Patent Document 1, the ceiling base structure is generally composed of a rafter and a rafter support material to be attached to the rafter, and the rafter and the rafter support material are arranged perpendicular to each other, and the rafter support material is fixed to the floor slab via a hanging member.

However, in Type 1 low-rise residential districts and Type 2 low-rise residential districts, which are zones defined by urban planning, the height from the ground to the highest point of a building is set at 10m or 12m or less.

Patent No. 5636218

The floor height of a building may be restricted by several factors, such as the Building Standards Act, wiring space for lighting, etc. In order to ensure the interior height within such restrictions, it is important to reduce the required height of the ceiling substrate.

An object of the present invention is to provide a ceiling substructure structure that reduces the height of the ceiling substructure and a method for constructing a ceiling substructure using this structure.

In order to solve such problems, the invention described in claim 1 is characterized in that, in the ceiling substructure of a steel-framed building, it is composed of a plurality of rafter screw nail holes formed on the center line of the crest of the deck plate that constitutes the floor slab, rafter screw nails for attaching the rafters to the underside of the crest of the deck plate, a plurality of rafters formed from square timber, a flat ceiling material, and ceiling material screw nails for attaching the ceiling material to the rafters.

The invention described in claim 2 is characterized in that, in addition to the structure described in claim 1, the vertical dimension of the joist is the deck height of the deck plate plus 5 to 15 mm.

The invention described in claim 3 is characterized in that, in addition to the structure described in claim 1 or 2, a furring strip installed on the underside of the crest of the deck plate is fixed from the upper side of the crest of the deck plate to the underside of the crest with the furring strip screw nail, and a ceiling material is fixed to the underside of the furring strip with a ceiling material screw nail.

According to the invention described in claim 1, the ceiling substructure of a steel-framed building is composed of a plurality of rafter screw nail holes formed on the center line of the peak portion of the deck plate that constitutes the floor slab, rafter screw nails for attaching the rafters to the underside of the peak portion of the deck plate, a plurality of rafters formed from square timber, a flat ceiling material, and ceiling material screw nails for attaching the ceiling material to the rafters.By doing so, it is possible to reduce the required height of the ceiling substructure and make effective use of the interior height.

According to the invention described in claim 2, by setting the vertical dimension of the joist to be 5 to 15 mm added to the deck height of the deck plate, the ceiling material does not come into contact with the valley portion of the deck plate, and the required height of the ceiling base can be reduced, making it possible to effectively utilize the interior height.

According to the invention described in claim 3, the furring strip installed on the underside of the crest of the deck plate is fixed from the upper side of the crest of the deck plate with the furring strip screw nails, and the ceiling material is fixed to the underside of the furring strip with the ceiling material screw nails. This makes it possible to reduce the required height of the ceiling underlayment and effectively utilize the interior height.

Hereinafter, an embodiment of the present invention will be described.

1 to 4 show an embodiment of the present invention.

Figure 1 shows a perspective view of a steel structure 1 of a building. The steel structure constituting a steel frame building is constructed by connecting multiple parallel steel columns 3 and multiple vertically parallel beams 4 with splice plates and high-strength bolts, and multiple deck plates 2 are fixed to the beams 4 to construct floor slabs on each floor.

Figure 2 shows an exploded view of the method of constructing a ceiling substructure for a steel frame structure of the present invention, showing the state before the rafters 11 and ceiling material 13 are attached to the deck plate 2 as shown in Figure 2b, and Figure 2a shows an oblique view of the state after the rafters 11 have been fixed to the underside of the peak portion 26 of the deck plate 2 described in Figure 2b, and the ceiling material 13 has been fixed to the underside of the rafters 11.

2b shows an exploded view of a joist screw 15 for fixing the joist 11 to the deck plate 2, two sets of deck plates 2 of the same shape arranged side by side with overlapping joints (shown as joint (A) 37 and joint (B) 41 in FIG. 4c) formed at the ends of each set of deck plates 2, a plurality of joist screw holes 16 formed on the center line of the peak portion 26 of the deck plate 2, a joist 11 formed of square timber fixed to the center line of the underside of the peak portion 26 of the deck plate 2 with the joist screw 15, a flat ceiling material 13 for fixing to the joist 11, a ceiling material screw hole 17 opened in the ceiling material 13 for fixing the ceiling material 13 to the joist 11, and a ceiling material screw 14 for attaching the ceiling material 13 to the joist 11. In addition, by using a siding 11 with a vertical dimension that is 5 to 15 mm added to the deck height dimension J (shown in Figure 4) of the deck plate 2 (as an example, if the deck height dimension of the deck plate 2 is 50 mm, the horizontal dimension of the siding 11 will be approximately 50 mm and the vertical dimension will be 55 to 65 mm), it is possible to prevent the siding 11 from coming into contact with the valley portion 25 of the deck plate 2, since the lower portion of the siding 11 protrudes downward from the valley portion 25 of the deck plate 2 (shown in Figure 3a), in order to prevent dimensional errors caused by warping of the wood that occurs when felled wood is processed into square timber at a sawmill.

2a shows a state in which the rafters 11 are installed on the underside of the peaks 26 of the deck plate 2 described in Fig. 2b, the peaks 26 of the deck plate 2 and the rafters 11 are fixed with rafter screws 15, and the ceiling material 13 is fixed to the rafters 11 fixed to the deck plate 2 with ceiling material screws 14. By fixing the rafters 11 to the underside of the peaks 26 of the deck plate 2 in this way, it is possible to reduce the height of the ceiling base and make the indoor ceiling higher.

Figure 3b shows an exploded cross-sectional view of the deck plate 2 described in Figure 2b attached to the lower flange of the beam 4 (H-shaped steel) described in Figure 1, as well as a joist screw nail 15 for fixing the joist 11 to the deck plate 2, the joist 11, a ceiling material 13, and a ceiling material screw nail 14 for attaching the ceiling material 13 to the joist 11.

Figure 3a shows the state in which the joists 11 are fixed to the underside of the center line of the crest 26 of the deck plate 2 explained in Figure 3b with joist screws 15, the ceiling material 13 is fixed to the joist 11 fixed to the deck plate 2 with ceiling material screws 14, deformed reinforcing bars (not shown) are installed on the upper side of the deck plate 2, and concrete 10 is poured to form a concrete slab. By configuring in this way, it is possible to omit hanging bolts, joist supports, etc., shortening the construction period and simultaneously increasing the height of the room by reducing the height of the ceiling base.

Figure 4 shows a cross-sectional view of the deck plate 2 described in Figures 2 and 3. The deck plate 2 is formed into a corrugated shape from a hot-dip galvanized steel plate having a thickness of about 1.2 mm, with an overall width dimension A of about 600 mm, an upper plate width dimension B of about 130 mm, a groove width dimension C of about 170 mm, an upper plate width dimension D of about 130 mm, a sleeve plate dimension E of about 65 mm, a ridge width dimension F of about 170 mm, a lower plate width dimension G of about 130 mm, a ridge width dimension H of about 170 mm, a sleeve plate dimension I of about 65 mm, and a deck height dimension J of about 50 mm. On the center line of the ridge portion 26 of the deck plate 2 shown in Figure 4c, a recess 35 is formed in a concave shape (recess dimension K of about 20 mm, recess groove dimension L of about 5 mm) as shown in the enlarged view of Figure 4a. Furthermore, on the center line of the valley portion 25 of the deck plate 2 shown in Figure 4c, two triangle-shaped portions 36 are formed on the left and right sides, as shown in the enlarged view of Figure 4b. (The triangle-shaped portion height dimension N is approximately 5 mm, the triangle-shaped portion bottom dimension O is approximately 8 mm, the triangle-shaped portion bottom width dimension P is approximately 37 mm, and the triangle-shaped portion bottom dimension Q is approximately 8 mm.) Furthermore, as shown in FIG. 4c, the shape of one of the engagement portions (A) 37 of the multiple deck plates 2 arranged side by side is such that, as shown in the enlarged view of FIG. 4d, the inclined plate (A) 44 is bent at an angle of about 112 degrees relative to the lower plate (A) 45, and the dimension of the inclined plate (A) 44 is about 16 mm, the engagement side (B) 43 is bent at an angle of about 248 degrees relative to the inclined plate (A) 44, and the dimension of the engagement side (B) 43 is about 8 mm, and the engagement side (A) 42 is bent at an angle of 90 degrees relative to the engagement side (B) 43, and the dimension of the engagement side (A) 42 is formed to be about 4 mm. As shown in the enlarged view of Fig. 4e, the inclined plate (C) 47 is bent at an angle of about 112 degrees with respect to the lower plate (C) 46, so that the dimension of the inclined plate (C) 47 is about 12 mm, and the engagement side (C) 48 is bent at an angle of about 158 degrees with respect to the inclined plate (C) 47, so that the dimension of the engagement side (C) 48 is about 4 mm. The engagement side (A) 42 of the engagement part (A) 37 of the adjacent deck plates 2 thus formed is placed over the engagement side (C) 48 of the engagement part (B) 41, and the deck plate 2 (shown in Fig. 2a) that constitutes the floor part of the floor slab is formed by overlapping each other. The recessed part 35 and the △ part 36 formed in the peak part 26 and the valley part 25 of the deck plate 2 are formed in the deck plate 2 to have a slip-stop effect so that the concrete 10 (shown in Fig. 3a) and the deck plate 2 do not slip.

The above provides a detailed explanation of the method for constructing a ceiling substructure for a steel-framed structure according to the present invention based on an embodiment of the invention. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention, and of course still fall within the technical scope of the present invention.

1 is a perspective view showing a steel frame structure of a building according to an embodiment of the present invention; 1A and 1B are exploded views showing the state before the deck plate and the ceiling underlayment are attached to the deck plate and the assembled state according to this embodiment. 3A and 3B are cross-sectional views showing a state before a rough frame and a ceiling underlayment are attached to the deck plate described in FIG. 2 and a state after assembly according to the embodiment. 4 is a cross-sectional view of the deck plate shown in FIG. 3 according to the embodiment.

A Overall width dimension B Width dimension of top panel C Groove width dimension D Width dimension of top panel E Sleeve panel dimension F Ridge width dimension G Width dimension of bottom panel H Ridge width dimension I Sleeve panel dimension J Deck height dimension K Recess dimension L Recess groove dimension M Ridge width dimension of convex portion N Height dimension of △ portion O Bottom dimension of △ portion P Width dimension of bottom of △ portion Q Bottom dimension of △ portion 1 Steel structure of building 2 Deck plate 3 Steel column 4 Beam 5 Foundation concrete 8 Arrow 9 Arrow 10 Concrete 11 Rafter 12 Concrete slab 13 Ceiling material 14 Screw nail for ceiling material 15 Screw nail for ridge 16 Screw nail hole for ridge 17 Screw nail hole for ceiling material 23 Arrow 24 Arrow 25 Valley portion 26 Ridge portion 35 Recess 36 △ portion 37 Joint portion (A)
38 Top plate 39 Bottom plate (B)
40 Inclined plate (B)
41 Contract Section (B)
42 Joint plate (A)
43. Joint plate (B)
44 Inclined plate (A)
45 Lower plate (A)
46 Lower plate (C)
47 Inclined plate (C)
48. Joint board (C)

Claims (3)

In the ceiling foundation of a steel frame building,
A plurality of screw nail holes for a joist formed on the center line of the crest of the deck plate constituting the floor slab;
A furring strip screw for attaching the furring strip to the underside of the crest of the deck plate;
There are several joists made of square timber,
A flat ceiling material,
A method for constructing a ceiling underlayment for a steel frame building, comprising the steps of: attaching a ceiling material to the rafters; and forming screw nails for ceiling materials. A method for constructing a steel frame building as described in claim 1, characterized in that the vertical dimension of the joist is the deck height of the deck plate plus 5 to 15 mm. The method for constructing a steel frame building as described in claim 1 or 2, characterized in that the furring strip is fixed to the underside of the crest of the deck plate from the upper side of the crest of the deck plate with the furring strip screw, and the ceiling material is fixed to the underside of the furring strip with the ceiling material screw.

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