JP2021124002A - Log-like building structure - Google Patents

Abstract

To provide a log house or a log house-like building structure and a construction method for facilitating a positioning of a log or timber when laminated, preventing a separation of the log or timber from an intersection part due to a horizontal vibration and improving the strength.SOLUTION: In the building structure, a recess part groove along a longitudinal direction of a corner column 250 and a projection part on a surface opposite to the recess part groove are provided, and timbers 50 capable of fitting into the recess part groove including the projection part of the column are inserted and fitted in the order from the uppermost end of the column and are laminated.SELECTED DRAWING: Figure 16

Description

The present invention relates to a log-like structure in which logs or square timbers are horizontally laminated on columns.

Log houses, which are construction methods that build walls by horizontally stacking logs or square timbers, use square logs, D-shaped logs, round logs, etc. as log materials, and round notches and wedges at the intersections between logs. Notches and square notches are used.

Japanese Patent No. 6595146 Japanese Unexamined Patent Publication No. 2001-173125 Jikkenhei 1-168705 Gazette

As described above, when a round notch, a wedge notch, etc. are adopted at the intersection of the log house, there is a problem that it is difficult to position the log materials at the intersection because the intersection of the logs is rounded and laminated. .. As a means of shortening the construction period by an efficient construction method, Patent Document 1 provides "tenons" for insertion on both sides of a log material in which a groove is cut out in a pillar and the upper surface is flattened in the groove. A method of dropping in order has been proposed.

Round notches and wedge notches in which log intersections are rounded and laminated are said to be vulnerable to lateral loads, and there is also the problem that log materials tend to come off the intersections due to rolling earthquakes. In Patent Document 2, at least one side surface forms a convex curved surface, a square notch portion and a round notch portion are formed in the notch, and the notched core portion is an upper and lower surface of the square notch portion. , The left and right surfaces are formed to be parallel to each other, and the round notch portion is cut out so as to widen toward the lower end of the log material so as to be flush with the side surface of the square notch portion. Therefore, a method has been proposed in which the side surfaces of the log materials that intersect and overlap each other to form a convex curved surface are fitted.

However, even if the square notch method is adopted, in order to use the log material as a wall, it is necessary to scrape off half the thickness of the log material and stack the log materials at the intersection, so it is compared with the original thickness of the log material. Therefore, the strength will be significantly reduced. As mentioned above, in the event of an earthquake, the load is not limited to mere vertical and rolling, and loads from multiple directions can be inferred at the intersections of the log materials. Therefore, the thickness of the log materials at the square notch is an earthquake. It is also necessary to consider the case where the lumber cannot withstand and breaks.

In view of the above problems, as a result of sincerity, the inventor is a building constructed by horizontally laminating logs or squares on columns made of high-strength materials such as steel and reinforced plastic, and the columns are long. Along with the concave groove along the direction, a convex portion is provided on at least one surface side of the opposite surface of the concave groove, and a bottom plate for erection of the pillar is provided at the bottom of the pillar, and both ends of the log or square timber are provided. Is a structure in which a concave groove that fits into a concave groove including a convex portion of the pillar is provided, and the log or a square member is inserted and stacked from the concave groove including the convex portion at the uppermost end of the pillar.

The depth of the concave groove of the column shall be equal to or more than twice the inner width of the concave groove. If the depth of the recessed groove is shorter than the inner width, when tensile stress or bending stress is applied to the inserted log or square timber, the length of the end from the recessed groove provided in the log or square timber is short, so the vicinity of the recessed groove. The width should be equal to or greater than the inner width because it is easily deformed or broken and easily slips out of the recessed groove of the column. Further, if the depth of the recessed groove of the column becomes too long, the beauty of the landscape as a log-like building is impaired, so the upper limit is twice the inner width of the recessed groove.

The position of the convex portion provided on the opposite surface of the concave groove is set to be 1/3 times or more and 2/3 times or less the depth of the concave groove of the pillar with reference to the bottom surface in the concave groove. .. If the position of the convex part is shorter than 1/3 times the depth of the concave groove, the length from the concave groove to the end of the log or square lumber will be too short as described above, resulting in tensile stress and bending stress. Since the strength becomes insufficient when loaded, the depth is set to 1/3 or more of the depth of the recessed groove of the column. Further, if the position of the convex portion is made longer than 2/3 times the depth of the concave groove, the length between the concave groove opening and the concave groove provided in the log or the square timber becomes too short, so that the same problem as described above occurs. The depth of the recessed groove of the column was set to 2/3 times or less.

The length of the convex portion of the pillar shall be 1/10 times or more and 1/5 times or less of the inner width of the concave groove of the pillar. If the length of the convex portion is shorter than 1/10 times the inner width of the concave groove, the concave groove provided in the log or the square timber is deformed due to the intermittent tensile stress, and the risk of coming off from the convex portion increases. / 10 times or more. If there is a convex part at the relative position of the opposite surface of the concave groove of the column, if it is longer than 1/5 times the inner width, the width of the log or square timber to be inserted between the opposing convex parts will be the initial column width. Since it is shorter than 3/5 times that of the above, the length of the convex part is set to 1/5 times or less due to the problem of strength. When the convex portions are not opposed to each other, the convex portion length can be expanded to 2/5 times or less.

What is the number of convex parts on the pillar? Although not particularly limited, considering the time and effort required to process the recessed grooves provided in the log or the square lumber, it is preferable that the opposite surfaces of the recessed grooves of the column are two or less, and one on each other is more preferable. In particular, in areas where earthquakes occur frequently, it may be considered that three or more of the opposite surfaces of the recessed grooves of the column are provided with each other.

When the convex part length is constant, the log or square lumber used for columns with convex parts at opposite positions of the opposing surfaces of the concave groove will have a thinner column thickness between the concave grooves, but on the opposing surface of the concave groove. Since the column thickness can be increased by forming columns with protrusions at positions that do not face each other, improvement in strength performance can be expected even when tensile stress or bending stress of logs or square timbers is applied.

Regarding the difference from the "hozo" structure that is generally used in the wooden house construction method, the pillars are carved out to form a convex part on one pillar and a concave part on the other pillar. The strength of the building itself is high because there are problems such as cracks in the concave parts and breakage of the convex parts due to rolling, and problems such as the protrusions coming off due to tensile stress. not high. On the other hand, the structure of the present invention is characterized by having extremely high strength.

For the log or square timber to be inserted, the top surface of the inserted log or square timber is designed to be flush with the top surface of the column. In addition, in order to prevent rainwater from entering from the joint surface between the inserted logs or between the square timbers, a joint surface that inclines diagonally upward from at least the outer wall side to the inner wall side with respect to the thickness direction of the logs or square timbers can be created. It is processed into.

Regarding the girder and beam to be placed on the column, the joint area between the girder and the beam is provided with notches so that the top surface of the girder and the top surface of the beam are flush with each other, and the top of the column is provided with a notch. The girder or beam placed on the upper part is provided with a through hole for penetrating a bolt attached to the uppermost part of the column in advance, and a strong wall can be formed by fastening the bolt with a nut.

In another embodiment, the top surface of the log or square member to be inserted is flush with the top surface of the column, and the top surface of the girder and the top surface of the beam are in the joint area between the girder and the beam mounted on the column. Notches are provided to each other so that the upper surfaces are flush with each other, and the girder or beam placed on the uppermost part of the column faces the threaded hole provided on the uppermost part of the column in advance. Is provided with a through hole, and a strong wall can be created by bolting the screw hole.

It is also possible to change the height of the floor by providing a partition plate in the bottom plate for erecting the pillar of the present invention and the recessed groove portion located above the bottom plate. The partition plate is provided inside the concave groove of the column, and it is necessary to design the strength enough to support the log material or the square lumber to be inserted, and a reinforcing column is erected between the bottom surface of the partition plate and the bottom plate of the column. It is also possible.

According to the building of the present invention, not only can it be constructed more easily than a conventional log house, but also the seismic strength is improved as compared with a log house or a wooden house constructed by a conventional method, so that the probability of collapse due to an earthquake Can be significantly reduced.

It is a top view which constitutes the pillar of this invention, and is the foundation part provided at the position where the convex part faces the surface which opposes the concave groove. It is a top view which constitutes the pillar of this invention, and is the foundation part provided at the position where the convex part does not face the surface which opposes the concave groove groove. It is a cross-sectional view of a stud composed of a foundation part provided at a position where a convex portion faces a surface opposite to a concave groove. It is a cross-sectional view of a corner column composed of a foundation part provided at a position where a convex portion faces the opposite surface of the concave groove. (A) The foundation part is welded to a triangular prism, and (b) The foundation part is welded to a square column. Cross-sectional view of a partition column composed of foundation parts provided at positions where the convex portions face each other on the opposing surfaces of the concave groove. Top view of a square lumber for foundation parts provided at a position where the convex portion faces the opposite surface of the concave groove. Top view of a square lumber inserted into a foundation part provided at a position where the convex portion faces the surface of the opposing concave groove groove. Top view of a square lumber for foundation parts provided at a position where the convex portion does not face the opposite surface of the concave groove Top view of a square lumber inserted into a foundation part provided at a position where the convex portion does not face the opposite surface of the concave groove. Cross-sectional view of a square lumber that is inserted into a foundation part and has no recessed groove. Perspective view of the uppermost corner column composed of foundation parts provided at positions where the convex portions face each other on the opposing surfaces of the concave groove. Perspective view of the lowermost corner column composed of foundation parts provided at positions where the convex portions face the opposite surfaces of the concave groove. Top view of the top of a stud composed of foundation parts provided at positions where the protrusions face the opposite surfaces of the recessed grooves. Top view of the uppermost corner column composed of foundation parts provided at positions where the convex parts face the opposite surfaces of the concave groove. Top view of the uppermost part of the partition column composed of foundation parts provided at positions where the convex parts face the opposite surfaces of the concave groove. External view showing a part of a building when a square lumber is inserted into a corner pillar composed of foundation parts provided at positions where the convex portion faces the opposite surface of the concave groove. Perspective view of the top of the pillar of the present invention

Hereinafter, embodiments according to the present invention will be described with reference to the drawings, but examples of the convex portions provided in the concave groove of the pillar according to the present invention are provided one by one on each surface. And. It should be noted that the examples are only one example, and changes can be made without departing from the present invention.

FIG. 1 is a top view of the pillars of the present invention, in which the pillars are provided with recessed grooves and convex portions A are provided at opposite positions of opposing surfaces 10 (hereinafter referred to as foundation parts E1). ) Consists of. FIG. 2 is a top view of a pillar constituting the second embodiment of the present invention, in which the pillar is provided with a concave groove, and the convex portion B and the convex portion C are provided at positions where the opposing surfaces 15 do not face each other. It consists of basic parts (hereinafter referred to as basic parts E2).

FIG. 3A is a cross-sectional view of a stud 100 assembled by using two foundation parts E1 and a square pillar 40, and is completed by welding the bottom surface of the outer surface of the foundation part E1 to the opposite surface of the square pillar 20. On the other hand, FIG. 3B is a cross-sectional view of the stud 150 assembled by using the two foundation parts E1, and is completed by welding the bottoms of the outer surfaces of the foundation parts E1.

FIG. 4A is a cross-sectional view of a corner column 200 assembled by using two foundation parts E1 and a right-angled isosceles triangular prism 30, and the bottom of the outer surface of the two foundation parts E1 is the hypotenuse of the right-angled isosceles triangular prism 30. It is completed by welding to. On the other hand, FIG. 4B is a cross-sectional view of a corner pillar 250 assembled by using two foundation parts E1 and a square pillar 20, and the bottom of the outer surface of the two foundation parts E1 is an adjacent surface of the square pillar. It is completed by welding to.

FIG. 5 is a cross-sectional view of the partition column 300 assembled by using three foundation parts E1, and is completed by welding the bottom of the outer surface of the three foundation parts E1 to the three surfaces of the square column.

Further, although not shown, the partition pillars in the four directions are completed by joining one foundation part E1 in the partition pillar 300. In this embodiment, the foundation part E1 is attached by a welding method, but it can also be fixed by bolts and nuts or screws, or a metal column may be manufactured by casting. Further, a desired pillar can be assembled by combining the foundation part E1 and the foundation part E2 with a polygonal pillar.

FIG. 6 shows a top view of the square lumber 50 for the foundation part E1, but the concave groove H1 is provided so as not to interfere with the convex portion A of the foundation part E1, and the square lumber 50 is inserted into the foundation part E1. The top view is shown in FIG.

FIG. 8 shows a top view of the square lumber 55 for the foundation part E2, but the concave groove H2 and the concave groove H3 are provided so as not to interfere with the convex portion B and the convex portion C of the foundation part E2, and the foundation. FIG. 9 shows a top view in which the square lumber 55 is inserted into the part E2.

FIG. 10 is a cross-sectional view of the square lumber 50 to be inserted into the base part E1 in a region without recessed grooves. The upper surface side of the square lumber has an upper surface flat portion T1 and an upper surface inclined portion S1, and the lower surface side has a lower surface flat portion T2 and a lower surface inclined portion S2. Since the upper surface flat portion T1 and the lower surface flat portion T2 side are loaded so as to correspond to the outer wall side, the structure is such that rainwater can be prevented from entering. Similarly, the square lumber 55 has the same structure.

FIG. 11 shows a perspective view of the uppermost corner column 200A composed of the foundation part E1. A bolt 75 is attached to the uppermost surface of the triangular prism 30 at the uppermost part of the corner column, and is used for fixing the beam and the girder. Further, the square lumber 50 is inserted from the uppermost portion of the foundation part E1. FIG. 12 shows a perspective view of the lowermost corner column 200B composed of the foundation part E1. A bottom plate 60 is attached to the lowermost layer at the bottom of the corner pillar, and the corner pillar is easily erected. Further, the bottom plate 60 is provided with a bolt through hole 70 for bolting to a concrete foundation.

FIG. 13 is a top view of the uppermost portion 150A of the stud composed of the foundation part E1, in which the bolt 76 is attached to the uppermost surface of the stud. FIG. 14 is a top view 250A of the uppermost portion of the corner pillar composed of the foundation part E1, and the bolt 77 is attached to the uppermost surface of the square pillar. The bolt 76 and the bolt 77 are used for fixing the beam and the girder in the same manner as the bolt 75 of the corner column.

FIG. 15 shows an external view showing a part of the building when a plurality of square timbers 50 are inserted into the corner pillar 250A, whereby the outer wall is completed. The bottom surface of the lowermost square lumber is only flattened, and the upper surface of the uppermost square lumber is only flattened.

FIG. 16 shows a perspective view of a beam 90 and a girder 95 spanning between columns, which are housed in the uppermost column of the present invention. In the pillar storage, the beam 90 is provided with a through hole 80 and the girder 95 is provided with a through hole 85 for penetrating a bolt attached to the top of the pillar, and the beam and the girder are placed on the top of the pillar. Notches are provided so that the top surface of the girder and the top surface of the beam are flush with each other when mounted. A strong wall can be created by fixing the bolts that have passed through these through holes with nuts. Similarly, a column having a screw hole at the uppermost portion is also provided with a through hole at a position facing the screw hole, and when the beam and the girder are placed on the uppermost part of the column, the uppermost surface of the girder and the beam Notches are provided so that the uppermost surfaces are flush with each other, and a strong wall can be formed by bolting.

As an example of the building construction method according to the present invention, the foundation part E1 shown in FIG. 1 is made of a steel material having a thickness of 20 mm, has a length of 140 mm inside the recess groove and an inner width of 70 mm, and has a width of 20 mm at a position 80 mm from the inner bottom of the recess groove. The pillar has a length of 15 mm and a pillar length of 2400 mm. The square lumber has a width that can be inserted into the recessed groove of the pillar, and is completed by setting the height to 140 mm and the length to 400 mm.

INDUSTRIAL APPLICABILITY The present invention can be used not only as a log-like house for a house but also as an emergency temporary housing in the event of a disaster because the construction period can be shortened.

10 Opposing concave groove surface 15 Opposing concave groove surface 20 Square pillar 30 Right-angle isosceles triangular pillar 50 Square material 55 Square material 60 Bottom plate 70 Bolt through hole 75 Bolt 76 Bolt 77 Bolt 78 Bolt 80 Bolt through hole 85 Bolt through hole 90 digits 95 Beams 100 Studs 150 Studs 150A Studs Top 200 Corners 200A Studs Top 200B Studs Bottom 250 Corners 250A Studs Top 300 Partitions 300A Studs Top A Convex B Convex C Convex H1 Concave Groove H2 Recessed groove H3 Recessed groove S1 Upper surface inclined part S2 Lower surface inclined part T1 Upper surface flat part T2 Lower surface flat part

It is a top view which constitutes the pillar of this invention, and is the foundation part provided at the position where the convex part faces the surface which opposes the concave groove. It is a top view which constitutes the pillar of this invention, and is the foundation part provided at the position where the convex part does not face the surface which opposes the concave groove groove. Cross-sectional view of a stud composed of foundation parts provided at positions where the protrusions face the opposite surfaces of the recessed grooves. Cross-sectional view of a corner column composed of foundation parts provided at positions where the convex portions face each other on the opposing surfaces of the concave groove. Cross-sectional view of a partition column composed of foundation parts provided at positions where the convex portions face each other on the opposing surfaces of the concave groove. Top view of a square lumber for foundation parts provided at a position where the convex portion faces the opposite surface of the concave groove. Top view of a square lumber inserted into a foundation part provided at a position where the convex portion faces the surface of the opposing concave groove groove. Top view of a square lumber for foundation parts provided at a position where the convex portion does not face the opposite surface of the concave groove Top view of a square lumber inserted into a foundation part provided at a position where the convex portion does not face the opposite surface of the concave groove. Cross-sectional view of a square lumber that is inserted into a foundation part and has no recessed groove. Perspective view of the uppermost corner column composed of foundation parts provided at positions where the convex portions face each other on the opposing surfaces of the concave groove. Perspective view of the lowermost corner column composed of foundation parts provided at positions where the convex portions face the opposite surfaces of the concave groove. Top view of the top of a stud composed of foundation parts provided at positions where the protrusions face the opposite surfaces of the recessed grooves. Top view of the uppermost corner column composed of foundation parts provided at positions where the convex parts face the opposite surfaces of the concave groove. Top view of the uppermost part of the partition column composed of foundation parts provided at positions where the convex parts face the opposite surfaces of the concave groove. External view showing a part of a building when a square lumber is inserted into a corner pillar composed of foundation parts provided at positions where the convex portion faces the opposite surface of the concave groove. Perspective view of the top of the pillar of the present invention

FIG. 1 is a top view of a pillar constituting the pillar of the present invention, and is composed of a foundation part (hereinafter, referred to as a foundation part E1) provided at a position where a convex portion A faces a surface 10 facing a concave groove. FIG. 2 is a top view of the pillars of the present invention, and is a foundation part provided at a position where the convex portion B and the convex portion C do not face each other on the opposing surfaces 15 of the concave groove (hereinafter referred to as the basic part E2). Consists of.

FIG. 3 is a cross-sectional view of a stud 100 composed of a foundation part E1 provided at a position where the convex portion A faces the opposite surface of the concave groove, and is a cross-sectional view of the outer surface side of the foundation part E1 facing the square pillar 20. Complete by welding the bottom part.

FIG. 4 is a cross-sectional view of a corner column 200 composed of a foundation part E1 provided at a position where the convex portion A faces the opposite surface of the concave groove, and is a bottom surface portion on the outer surface side of the two foundation parts E1. Is welded to the hypotenuse of the right-angled isosceles triangular prism 30 to complete the process.

FIG. 5 is a cross-sectional view of a partition column 300 composed of a foundation part E1 provided at a position where the convex portion A faces the opposite surface of the concave groove, and is a bottom surface portion on the outer surface side of the three foundation parts E1. Is welded to the three sides of the square pillar 20 to complete.

FIG. 6 shows a top view of the square lumber 50 for the foundation part E1 provided at a position where the convex portion faces the opposite surface of the concave groove, but the concave portion so as not to interfere with the convex portion A of the foundation part E1. The groove H1 is provided, and FIG. 7 shows a top view in which the square lumber 50 is inserted into the foundation part E1 provided at a position where the convex portion A faces the surface of the concave groove that opposes the groove H1.

FIG. 8 shows a top view of the square lumber 55 for the foundation part E2 provided at a position where the convex portion does not face the opposite surface of the concave groove, but interferes with the convex portion B and the convex portion C of the foundation part E2. FIG. 9 shows a top view in which the recessed groove H2 and the recessed groove H3 are provided so as not to prevent the square lumber 55 from being inserted into the foundation part E2.

FIG. 11 shows a perspective view of the uppermost corner column 200A composed of the foundation part E1 provided at a position where the convex portion faces the opposite surface of the concave groove. A bolt 75 is attached to the uppermost surface of the triangular prism at the uppermost part of the corner column and is used for fixing the beam and the girder. FIG. 12 is a perspective view of the lowermost corner column 200B composed of the foundation part E1 provided at a position where the convex portion faces the opposite surface of the concave groove. A bottom plate 60 is attached to the lowermost layer at the bottom of the corner pillar, and the corner pillar is easily erected. Further, the bottom plate 60 is provided with a bolt through hole 70 for bolting to a concrete foundation.

FIG. 13 is a top view of the uppermost portion 150A of a stud composed of the foundation part E1 provided at a position where the convex portion faces the opposite surface of the concave groove, and the bolt 76 is attached to the uppermost surface of the square pillar 20. There is. FIG. 14 is a top view of the uppermost corner pillar 250A composed of the foundation part E1 provided at a position where the convex portion faces the opposite surface of the concave groove, and the bolt 77 is attached to the uppermost surface of the square pillar 20. ing. FIG. 15 is a top view of the partition pillar 300A composed of the foundation part E1 provided at a position where the convex portion faces the opposite surface of the concave groove, and the bolt 78 is attached to the uppermost surface of the square pillar 20. .. The bolts 76 to 78 are used to fix the beam and the girder in the same manner as the bolt 75 of the corner column.

FIG. 16 shows a part of a building when a square lumber is inserted into a corner pillar shown in FIG. 14 composed of a foundation part E1 provided at a position where a convex portion faces a surface opposite to a concave groove. The external view is shown, which completes the outer wall. The bottom surface of the lowermost square lumber is only flattened, and the upper surface of the uppermost square lumber is only flattened.

FIG. 17 shows a perspective view of a beam 90 and a girder 95 spanning between columns, which are housed in the uppermost column of the present invention. In the pillar storage, the beam 90 is provided with a through hole 80 and the girder 95 is provided with a through hole 85 for penetrating a bolt attached to the top of the pillar, and the beam and the girder are placed on the top of the pillar. Notches are provided so that the top surface of the girder and the top surface of the beam are flush with each other when mounted. A strong wall can be created by fixing the bolts that have passed through these through holes with nuts. Similarly, a column having a screw hole at the uppermost portion is also provided with a through hole at a position facing the screw hole, and when the beam and the girder are placed on the uppermost part of the column, the uppermost surface of the girder and the beam Notches are provided so that the uppermost surfaces are flush with each other, and a strong wall can be formed by bolting.

10 Opposing concave groove surface 15 Opposing concave groove surface 20 Square pillar 30 Right-angle isosceles triangular pillar 50 Square material 55 Square material 60 Bottom plate 70 Bolt through hole 75 Bolt 76 Bolt 77 Bolt 78 Bolt 80 Bolt through hole 85 Bolt through hole 90 girder 95 Beam 100 Stud 150A Stud top 200 Corner pillar 200A Corner pillar top 200B Corner pillar bottom 250A Corner pillar top 300 Partition pillar 300A Partition pillar top A Convex B Convex C Convex H1 Recess groove H2 Recess groove H3 Recessed groove S1 Upper surface inclined portion S2 Lower surface inclined portion T1 Upper surface flat portion T2 Lower surface flat portion

Claims (8)

It is a building constructed by horizontally stacking logs or square timbers on pillars.
The pillar is provided with a concave groove along the longitudinal direction and a convex portion on at least one surface side of the opposite surface of the concave groove, and the bottom of the pillar is provided with a bottom plate for erecting the pillar.
Both ends of the log or square lumber are provided with concave grooves that fit into the concave groove including the convex portion of the pillar, and the log or square lumber is inserted and stacked from the concave groove including the convex portion at the uppermost portion of the pillar. A building that can be built. The building according to claim 1, wherein the depth of the concave groove of the pillar is equal to or more than twice the inner width of the concave groove. The position of the convex portion provided on the opposite surface of the concave groove of the pillar is 1/3 times or more and 2/3 times or less of the depth of the concave groove of the pillar with reference to the inner bottom surface of the concave groove of the pillar. The building according to claim 1, characterized in that. The length of the convex portion provided on the opposite surface of the concave groove of the pillar is 1/10 or more and 1/5 times or less of the inner width of the concave groove of the pillar when the convex portion faces each other. The building according to claim 1, wherein when the convex portions are not opposed to each other, the inner width of the concave groove groove of the pillar is 1/10 times or more and 2/5 times or less. The building according to claim 1, wherein a bolt or a screw hole is provided at the uppermost portion of the pillar. The joint region between the girder and the beam placed on the uppermost portion of the column is provided with notches, and the uppermost surface of the girder and the uppermost surface of the beam are flush with each other. The building according to claim 1. The girder or beam placed on the top of the pillar is at a position facing the through hole for penetrating the bolt provided on the top of the pillar or the screw hole provided on the top of the pillar. The building according to claim 5, wherein a through hole is provided. The building according to claim 1, wherein a partition plate for stopping the insertion of a log or a square lumber is provided in a recessed groove located above the bottom plate of the pillar.

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