JPH0860676A - Steel framed footing beam construction structure - Google Patents

Abstract

PURPOSE: To prevent the increase of kinds of steel framed column by methods of the joint of a steel framed footing beam with a pedestal, to facilitate conveyance and stock of the steel framed column without being bulked, to make it possible to joint the steel framed footing beam with the steel framed column efficiently by means of a shear wrench without being influenced by distance of a clear between the steel framed footing beam and ground and to reduce the number of bolts used for connecting between the steel framed footing beam and steel framed column to promote joint work efficiency. CONSTITUTION: A joint box 12 welding a base plate 13 to be bottom is welded to a part of the lower end of a steel framed column, 37, and the base plate 13 is screwed to the independent foundation 14 with an anchor bolt 43 and is fixed. An end plate 16 is welded to a steel framed footing beam 15. The end plate 16 is screwed to a pedestal 11 formed of the joint box 12 and is fixed, and the steel framed footing beam 15 is constructed between the pedestal 11 and pedestal 11. One side bolt 17 is used for screwing and fixing between the endplate 16 and joint box 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction structure for a steel-framed foundation beam bridged between column bases of a steel-framed column.

[0002]

2. Description of the Related Art Conventionally, in the case of constructing a steel foundation beam between the column bases of a steel column, as shown in FIG. 15, a bracket beam 31 and a steel frame foundation beam 15 taken out from the column base 11 are used as a general diaphragm. A method is used in which splice plates 35 are superposed on both front and back surfaces of the flanges 32 and 33 and the web 34, bolted, and joined through the splice plates 35. A high-strength bolt is used as the bolt 36, and a shear wrench is used to tighten the bolt.

[0003]

The bracket beam 31 is
It is welded to the column base 11 and protrudes from the steel column 37. For this reason, the steel column 37 has the bracket beam 31 protruding from it.
Becomes bulky by the amount of
A large space is required for temporary placement at the construction site by the amount that the bracket beam 31 projects. Moreover, the steel column 37
Since the materials must be stocked so that the bracket beams 31 protruding from the building do not hit the building beams, the storage of the steel frame columns 37 becomes complicated.

Particularly, the steel column 37 has a bracket beam 31 protruding in only one direction, depending on the position where it is erected, in two directions in which the direction is changed by 90 degrees as shown in FIGS. 15 and 16. The steel beam column 37 with the bracket beam 31 protruding, the steel beam column 37 with the bracket beam 31 protruding in two directions with the direction changed by 180 degrees as shown in FIG. 17, and the bracket beam 31 protruding in three directions as shown in FIG. Steel column 37,
As shown in FIG. 19, there is a steel column 37 having bracket beams 31 protruding in four directions.

Further, in the case of partitioning the general floor and the soil with the steel column 37 as a boundary, a step is formed between the steel foundation beam supporting the general floor and the steel foundation beam supporting the soil, and accordingly the steel frame is provided. A step is provided between the bracket beam projecting from the column 37 to the general floor side and the bracket beam projecting to the soil side, and the bracket beam is welded to the column base. Therefore, the steel frame column 37 can be a steel frame column having a step between the several bracket beams protruding in such a manner, or a steel frame column having no step between the several bracket beams.

As described above, there are various types of steel frame columns 37 having different levels of the top end 29 of the bracket beam 31 and various types having different number and direction of protrusion of the bracket beams 31. Not only is it complicated, but the cost is high for the steel column 37 due to the large number of types. Further, since the number of high-strength bolts 36 used when joining the bracket 31 and the steel-frame foundation beam 15 is large, joining work is troublesome. In addition, the steel foundation beam 15 to be constructed
When the clearance (gap) 38 between the ground and the ground is as narrow as 20 cm or less, bolt tightening work cannot be performed using a shear wrench in the narrow clear 38.

[0007]

SUMMARY OF THE INVENTION Therefore, a first object of the present invention is to prevent the number of types of the steel columns 37 from increasing depending on how the steel foundation beams 15 are joined to the column base 11. A second object of the present invention is to make the steel column 37 easy to carry and stock without being bulky. The third object of the present invention is to
The purpose of the present invention is to enable the steel foundation beam 15 to be efficiently joined to the steel column 37 using a shear wrench without depending on the size of the clear 38 between the steel foundation beam 15 and the ground. The fourth object of the present invention is to provide a steel foundation beam 15 and a steel column 3.
The number of bolts 36 used for joining with 7 is reduced, and the work efficiency of the joining is improved.

[0008]

The structure for constructing a steel foundation beam according to the present invention comprises a base plate 1 attached to the bottom of a joint box 12 attached to the lower end of a steel column 37.
End plate 1 in which 3 is screwed and fixed to the independent foundation 14 by anchor bolts 43 and welded to the steel foundation beam 15
6 is screwed and fixed to the joint box 12, and the column base 11 and the column base 1 configured by the joint box 12 are provided.
1 is characterized in that the steel foundation beam 15 is erected. The lower end portion of the steel column 37, the joint box 12, and the base plate 13 are welded together.

Bolt insertion holes 22.2 of the joint box 12 for tightening the bolts 17 for fixing with screws.
3, 24, 25, 26, 27, 28 may be screw holes, but when one side bolt is used for the bolt 17, those bolt insertion holes 22, 23, 24, 2 are used.
It is not necessary to use 5, 26, 27, 28 as screw holes. In addition, bolt insertion 22 ・ 23 ・ 24 ・ 25 ・ 26 ・ 27 ・
Instead of using 28 as a screw hole, a nut 79 may be attached to the back side of the joint box 12 by welding or other joining means, and the bolt 77 may be fixed by screwing and tightening.

Each of the four sides 18 of the joint box 12
19/20 and 21 have bolt insertion holes 22 for fixing the end plate 16 to the upper end side of the joint box 12 with screws, and bolt insertion holes for fixing the end plate 16 to the lower end side of the joint box 12 with screws. Opening 27 in duplicate, one side 18 of the joint box 12
The top end 29A of one steel foundation beam 15A having the end plate 16A fixed by screws to the joint box 12
A step 3 is formed between the end plate 16B and the top end 29B of another steel-frame foundation beam 15B having the end plate 16B screwed and fixed to the other side face 20 of
It is possible to set 0. That is, the number of the bolt insertion holes 22 to 28 of the joint box 12 is the same as the steel foundation beam 1
The number of bolt insertion holes 39 to 42 of the end plate 16 of No. 5 can be increased. If the strength of the joint box 12 is insufficient because the joint box 12 becomes taller or the number of steel foundation beams 15 to be connected and the acting stress become large, a small hole 88 is formed in the upper portion of the joint box 12. The joint box 12 can be increased in strength by injecting grout 90.

[0011]

In the present invention, the joint box 1 is attached to the column base 11.
Since the base plate 13 is attached to the bottom surface of the joint box 12 of the joint box 12, the steel column 37 can be screwed and fixed to the independent foundation 14 via the anchor bolts 43 as in the case of a normal steel column. Since the end plate 16 is screwed and fixed and closely adheres to the joint box 12, the steel foundation beam 15 is fixed to the joint box 12.
Is firmly installed between the column base 11 and the column base 11. Hereinafter, the present invention will be described with reference to illustrated embodiments.

[0012]

First Embodiment FIGS. 1, 2 and 3 show a first embodiment of the present invention in which a joint box 12 is welded to the lower end portion of a steel frame column 37.
The bottom surface of 2 is a base plate 13. Bolt insertion holes 44, 45, 46, at the four corners of the base plate 13
47 is opened, and the base plate 13 is screwed and fixed to the independent foundation 14 by the anchor bolts 43 fitted in the bolt insertion holes 44, 45, 46, and 47.

The four sides 18/1 of the joint box 12
Four bolt insertion holes 22, 23, 24, and 25 are opened vertically in 9/20 and 21 symmetrically, respectively. The uppermost bolt insertion hole 22 and the second
The distance from the third bolt insertion hole 23 is equal to the distance between the third bolt insertion hole 24 and the lowest bolt insertion hole 25. In addition, the distance between the second bolt insertion hole 23 and the third bolt insertion hole 24 is twice the distance between the uppermost bolt insertion hole 22 and the second bolt insertion hole 23. Has become.

An end plate 16 is welded to the end side surface of the steel foundation beam 15, and the end plate 16 has bolt insertion holes 22, 23, 24, ...
Four bolt insertion holes 39, 40, 41, and 42, which are aligned with the number 25, are opened symmetrically in the vertical direction, four by four. The end plate 16 has bolt insertion holes 39, 40,
The one side bolt 17 inserted in 41/42 is the bolt insertion hole 22 ・ 23 ・ 24.2 of the joint box 12.
5 and is fixed to the joint box 12 with screws.

FIGS. 5 and 6 show an example of the one side bolt 17. This one side bolt 17A has a pin 52
And a valve sleeve 53 and a grip sleeve 5 which are arranged on the outer periphery of the pin 52 in order from the pin head 50 side.
4, a shear washer 55, a receiving washer 51 and a nut 56.

The pin 52 has a threaded portion 58 following the round shaft portion 57.
Has a fracture groove 59 in the middle thereof, a pin head 50 having a diameter slightly larger than the pin diameter at the tip, and a short pin tail 60 following the screw portion 58. On the outer peripheral surface of the pin tail 60, a non-slip concavo-convex surface having a large number of teeth arranged in the axial direction in the circumferential direction is formed. Valve sleep 53
Is made of a material softer than the grip sleeve 54, and can be plastically deformed outward in the form of a brim by the load of axial resistance. For example, when the grip sleeve 54 is made of a hard steel alloy, the valve sleeve 53 is made of a soft steel alloy. The receiving washer 51 has an inner diameter that allows the grip sleeve 54 to enter. An annular groove 61 with which the outer peripheral portion of the shear washer 55 is fitted is attached to the side surface on the pin head side. The share washer 55 has an inner peripheral portion that engages with the end surface of the grip sleeve 54 and shears with a predetermined axial force.

In this example, the diameter of the tip end portion 57A of the round shaft portion 57 of the pin 52 is slightly larger than that of the base portion 57B through the step 62, and the inner diameter of the grip sleeve 54 is larger than that of the tip portion 57A in the previous period. Also has a small diameter. Round shaft 57
May have the same diameter over the entire length.

For tightening the one-side bolt 17A, a pin wrench 60 is gripped with a shear wrench and the nut 56 is tightened with the box-type nut engaging portion, and a compressive force acts between the pin head 50 and the shear washer 55. As a result, the grip sleeve 54 and the valve sleeve 53 are sandwiched, and the valve sleeve 53 at the tip end is plastically deformed outward in the form of a brim, that is, barbing.

When the round shaft portion 57 of the pin 52 is stepped, barbing occurs until the stepped portion 62 is engaged with the grip sleeve 54. When the nut 56 is further tightened, the shear washer 55 is sheared, the grip sleeve 54 enters the receiving washer 51, and the flange-shaped deformed portion 63 of the valve sleeve 53 engages with the inner surface of the bolt insertion hole of the joint box 12. , The joint box 12 and the end plate 16 between the nut 56 and the collar-shaped plastically deformed portion 63.
A tightening axial force is introduced into. Then, when the nut 56 is further tightened, the pin tail 6 with the predetermined axial force introduced.
0 breaks in the break groove 59 (FIGS. 5 and 6).

When this one side bolt 17A is used, strong joining can be achieved. That is, due to the shearing of the shear washer 55, the tightening force between the nut 56 and the flange-shaped deformed portion 63 of the valve sleeve 53 becomes the tightening force that sandwiches the joint box 12 and the end plate 16, and a strong tightening force is obtained. Also, this one side bolt 17
In the case of A, the flange-shaped deformed portion 63 of the valve sleeve 53, which serves as the head of the bolt, spreads widely, so that the contact pressure with the joint box 12 becomes small, and the hole diameter of the bolt insertion hole is relatively allowable. Therefore, the problem that the edge of the bolt insertion hole is deformed by the contact pressure and the bolt head is fitted is unlikely to occur, and the load bearing capacity of the bolt head formed by the collar-shaped deformed portion 63 is improved, and the one-sided The tightening force of the bolt 17A is improved. Since the nut 56 is tightened by turning, the nut 56 can be tightened twice or retightened.

7 and 8 show another example of the one-side bolt 17. This one side bolt 17B has a pin 67
And a first sleeve 68, a second sleeve 69, a grip justifier 70, a washer 71, and a collar 72 that cover the outer periphery of the pin 67 in order from the pin head 66 side.

The pin 67 has a thread groove-shaped concave and convex peripheral surface portion 65 and a fracture groove 64 in the middle, and a pin head portion 66 having a diameter slightly larger than the pin diameter at the tip on the concave and convex peripheral surface portion 65 side. The other end of the pin 67 is a pin tail 73 on the uneven peripheral surface that is held by a shear wrench, and a large number of annular grooves are formed on the uneven peripheral surface.

The outer diameter surface of one end of the second sleeve 69 is
It is formed into a tapered taper surface that penetrates into the first sleeve 68 and spreads the first sleeve 68. The grip adjuster 70 has a large-diameter cylindrical portion 74 having a diameter capable of being fitted inside and outside.
And the small-diameter cylindrical portion 76 are continuous by the stepped portion 75, and the stepped portion 75 is sheared by a predetermined axial load. Color 72
Is formed in a short tubular shape and has a taper tubular portion 77 that is open toward the pin tail 73 side, and is plastically deformed by drawing the outer diameter so that the inner diameter surface bites into the uneven peripheral surface portion 65 of the pin 67.

A shear wrench can be used for tightening the one-side bolt 17B. When the pin tail 73 is pulled by applying the diaphragm guide to the collar 72, a washer 71, between the collar 72 and the pin head 66, Grip adjuster 70, second sleeve 69 and first sleeve 68
The compressive force that clamps the
The tapered surface portion of the sleeve 69 enters the first sleeve 68 and pushes the first sleeve 68 apart. When the deformation of the first sleeve 68 is completed, the grip adjuster 70 shears at the stepped portion 76, the small diameter tubular portion 75 enters the large diameter tubular portion 74, and the first sleeve 68 engages with the joint box 12. The throttle of the collar 72 starts, and the introduction of the axial force to the joint box 12 and the end plate 16 is started. The squeezing of the collar 72 is completed, the inner diameter surface of the collar 72 is fixed in a state of biting into the uneven peripheral surface portion 65 of the pin 67, an axial force is introduced by a predetermined force, and the pin tail 73 is fractured from the fracture groove 64 (see FIG. 7). (Figure 8). In this way,
The joint box 12 and the end plate 16 are sandwiched between the first sleeve 68 and the collar 72 in the expanded state.

Even if the one-side bolt 17B is used in this manner, it is possible to firmly bond them. That is, in the one-side bolt 17B, the grip adjuster 70 is sheared, and the tightening force between the first sleeve 68 and the collar 72 becomes the tightening force that sandwiches the joint box 12 and the end plate 16 as it is. A tightening force can be obtained.

[0026]

Second Embodiment FIG. 4 shows a second embodiment of the present invention.
The joint box 12 is welded to the lower end portion of the steel column 37, and the bottom surface of the joint box 12 is a base plate 13. Bolt insertion holes 44, 45 (46, 47) are opened at the four corners of the base plate 13, and the base plate 13 is fixed by the anchor bolts 43 fitted in the bolt insertion holes 44, 45 (46, 47). It is fixed to the independent foundation 14 with screws.
Four sides of joint box 12, 18, 20, 20
Six bolt insertion holes 22, 23, 24, 25, 26, and 27 are symmetrically formed on the upper and lower sides of the structure 1 at equal intervals. An end plate 16 is welded to the end side surface of the steel foundation beam 15.

In the end plate 16, four bolt insertion holes 39, 40, 41, 42 are symmetrically formed in the left-right direction and arranged vertically. The interval between the uppermost bolt insertion hole 39 and the second bolt insertion hole 40, and
The third bolt insertion hole 41 and the lowest bolt insertion hole 4
Joint boxes 1 are arranged at equal intervals vertically.
2 bolt insertion holes 22, 23, 24, 25, 26, 27
And the distance between the second bolt insertion hole 40 and the third bolt insertion hole 41 is equal to the distance between the bolt insertion holes 22, 23, 24, 25, 26.2 of the joint box 12.
It is twice the interval of 7.

On the right side surface 18 of the joint box 12, the uppermost stage bolt insertion hole 22 is provided with an end plate 1.
The uppermost bolt insertion hole 39 of 6A is aligned, and the steel frame foundation beam 15A is joined by the one side bolt 17 via the end plate 16A. On the other hand, on the left side surface 20 of the joint box, the bolt insertion hole 27 at the bottom is provided.
The lowermost bolt insertion hole 42 of the end plate 16B is aligned with, and the steel frame foundation beam 15B is joined by the one side bolt 17 via the end plate 16B.

Therefore, in the second embodiment, the bolt difference of the joint box 12 is provided between the top end 29A of the steel frame foundation beam 15A joined to the right side and the top end 29B of the steel frame foundation beam 15B joined to the left side. Insertion hole 22 ・ 23 ・ 24 ・ 25/2
A step 30 having the same size as the interval of 6 · 27 is formed. Of course, by increasing the height of the joint box 12 and increasing the number of the bolt insertion holes (22), the bolt insertion holes 2
It is also possible to form the steps 30 that are several times the intervals of 2, 23, 24, 25, 26, 27.

Reference numeral 28 is an ALC plate which is installed on the right steel foundation beam, whereby a normal floor is formed on the steel foundation beam 15A. A deck plate (not shown) is constructed on the steel-frame foundation beam 15B on the left side, and concrete is placed on the deck plate to form a soil floor.

Although the one-side bolts are used in the first and second embodiments, when the normal bolt 77 is used, the bolt insertion holes 22, 23, 24, 25, 26.
27 is a screw hole. Such screw holes are
The bolt 79 can also be directly welded to the back side of the bolt insertion hole 22, 23, 24, 25, 26, 27 (FIG. 12). However, the cap 80 in which the nut 79 is fitted is welded to the inner side of the joint box 12, and the nut 79 is inserted through the cap 80 into the bolt insertion hole 22.2.
It is good to fix it on the back side of 3, 24, 25, 26, 27.

FIG. 9 illustrates a cap 80 for fixing the nut 79 as such. That is,
On the bottom surface 82 of the recess 81 into which the nut 79 is fitted, a bolt projecting port 83 is opened in accordance with the screw hole 78 of the nut 79. Every other side surface around the nut 79 is in contact with the peripheral wall surface 84 of the recess 81, so that the nut 79 does not rotate in the recess 81. The end edge of the recess 81 is a tongue piece 85 protruding outward at a right angle to the peripheral wall surface so that it can be welded to the plate 86.

The nut 79 has holes 87 formed at the same intervals as the bolt insertion holes 22, 23, 24, 25, 26, 27 as shown in FIG.
The screw hole 78 is aligned with, the tongue piece 85 is welded to the plate 86, and the nut 79 is joined to the plate 86 via the cap 80.
It is also possible to align the screw holes 78 of the nut 79 with the bolt insertion holes 22, 23, 24, 25, 26, 27 of and to weld and attach the joint box 12 (FIG. 11).

When the joint box 12 becomes tall and the strength of the joint box 12 is insufficient, or the number (quantity) of the steel underground beams 15 to be connected is large, as a result, the stress acting on the joint box 12 is increased. When the joint box 12 is insufficient in strength due to the increase in size, as shown in FIGS. 13 and 14, small holes 88 and 89 are opened in the upper part of the joint box 12 and inserted into the small holes 88 and 89. Nozzle 91 to grout 9
The joint box 12 can be reinforced by injecting 0. As the grout 90, a non-shrinkable mortar such as Dencatascon (trade name of Denki Kagaku Kogyo Co., Ltd.) or Pre-U-Flox Grout (trade name of Onoda Kenzai Co., Ltd.) can be used.

[0035]

According to the present invention, the end plates 16 welded to the end side surfaces are brought into close contact with the joint box 12 and the steel frame foundation beams 15 are joined by the bolts 17, so that the splice plate 35 which has been used conventionally is not necessary.

When the steel foundation beam 15 is joined to the steel column 37 via the splice plate 35, one splice plate 35 is provided with at least four symmetrical bolt insertion holes, which are symmetrical to each other. Since the upper and lower flanges 32 and 33 of the steel foundation beam and the web 34 were bolted together, a total of at least 24 bolts 36 were required. However, in the present invention, the steel column 37 and the steel foundation beam 15 are required.
Since it suffices to use eight bolts 17 for each joining point with, the work efficiency of joining with the bolts is at least tripled.

Since the joining is performed on the vertical plane between the end plate 16 and the joint box 12 where the steel foundation beam 15 does not bend, only the shearing stress due to the gravity of the steel foundation beam 15 is applied to the bolt 17 to be joined. Since it works, the one side bolt 17 can be used, and the nut is not required, so the tightening work becomes easy.

Since the steel column 37 according to the present invention does not have a protrusion such as the bracket beam 31, it is not bulky to carry and stock, and therefore it is easy to carry and stock.

A steel frame foundation beam 15 can be joined to each of the four side surfaces 18, 19, 20 and 21 of the joint box 12, and the bracket beam 31 can be changed in direction and height like a conventional steel frame column. Since there is no need to change and project it, the number of types of steel columns is reduced, making it easier to standardize as a system.

Further, the bracket beam 31 and the steel foundation beam 15
In the conventional method of abutting and abutting each other through the horizontally oriented splice plate 35, the bracket beam 31 and the steel frame foundation beam 15 to be butted and the bolt insertion hole 48 are abutted.
Although a slight amount of loose fitting is possible between the bolt and the bolt 36, in the present invention, since the end plate 16 to be joined and the joint box 12 are in close contact with each other, there is no room for rattling in the horizontal direction of the constructed steel foundation beam 15. Construction accuracy is secured.

Then, as described in detail in the second embodiment, the four side surfaces 18 of the joint box 12 on each side.
The bolt insertion hole 22 for screwing and fixing the end plate 16 to the upper end side of the joint box 12, and the end plate 16 on the joint box 12.
When the bolt insertion hole 27 for screwing and fixing is opened on the lower end side of the joint box 12, one side surface 1 of the joint box 12 is
The top end 29A of one steel foundation beam 15A with the end plate 16A screwed and fixed to 8 and the joint box 1
2 can be provided with a step 30 between the other side surface 20 and the top end 29B of another steel-frame foundation beam 15B having the end plate 16B fixed by screws, whereby a steel frame at a low floor such as a store or a pilotay. It can also be applied to the foundation beam 15B.

Since the bolts 17 for joining the steel columns 37 and the steel foundation beams 15 are used in the horizontal direction, the shears for tightening the bolts 17 by the width of the clear 38 between the steel foundation beams 15 and the ground 49. The use of a wrench will not be affected.

[Brief description of drawings]

FIG. 1 is a front view of a joint portion of a steel foundation beam with a column base according to a first embodiment of the present invention.

FIG. 2 is a sectional front view of a joint portion of a steel-framed foundation beam with a column base according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional plan view of a joint portion of the steel foundation beam with the column base according to the first embodiment of the present invention.

FIG. 4 is a sectional front view of a joint portion of a steel-frame foundation beam with a column base according to a second embodiment of the present invention.

FIG. 5 is a sectional side view of a one-side bolt used in the embodiment of the present invention.

FIG. 6 is a sectional side view of a one-side bolt used in an embodiment of the present invention.

FIG. 7 is a sectional side view of the one-side bolt used in the embodiment of the present invention.

FIG. 8 is a sectional side view of a one-side bolt used in the embodiment of the present invention.

FIG. 9 is a perspective view of a nut and a cap used in an embodiment of the present invention.

FIG. 10 is a cross-sectional side view of a plate with nuts used in an embodiment of the present invention.

FIG. 11 is a sectional front view of a column base according to the embodiment of the present invention.

FIG. 12 is a sectional front view of a column base according to an embodiment of the present invention.

FIG. 13 is a cross-sectional front view of a joint portion of the steel foundation beam with the column base according to the embodiment of the present invention.

FIG. 14 is a cross-sectional front view of a joint portion of a steel foundation beam with a column base according to an embodiment of the present invention.

FIG. 15 is a perspective view of a joint portion of a conventional steel foundation beam with a column base.

FIG. 16 is a plan view of a conventional steel column.

FIG. 17 is a plan view of a conventional steel frame column.

FIG. 18 is a plan view of a conventional steel frame column.

FIG. 19 is a plan view of a conventional steel column.

[Explanation of symbols]

 11 Column Base 12 Joint Box 13 Base Plate 14 Independent Foundation 15 Steel Foundation Beam 16 End Plate 17 One Side Bolt 18 Side of Joint Box 19 Side of Joint Box 20 Side of Joint Box 21 Side of Joint Box 22 Joint Box Bolt Insertion Hole 23 Joint Box Bolt Insertion Hole 24 Joint Box Bolt Insertion Hole 25 Joint Box Bolt Insertion Hole 26 Joint Box Bolt Insertion Hole 27 Joint Box Bolt Insertion Hole 28 ALC Plate 29 Top End 30 Step 31 Bracket Beam 32 Flange 33 Flange 34 Web 35 Splice Plate 36 Bolt 37 Steel Column 38 Clear 39 End Plate Bolt Insertion Hole 40 End Plate Volt Insertion hole 41 Bolt insertion hole of end plate 42 Bolt insertion hole of end plate 43 Anchor bolt 44 Bolt insertion hole of base plate 45 Bolt insertion hole of base plate 46 Bolt insertion hole of base plate 47 Bolt insertion hole of base plate 48 Bolt insertion hole 49 Ground 50 Pin head 51 Receiving washer 52 Pin 53 Valve sleeve 54 Grip sleeve 55 Shear washer 56 Nut 57 Round shaft part 58 Screw part 59 Breaking groove 60 Pin tail 61 Annular groove 62 Step part 63 Collar-like deforming part 64 Broken Part 65 Uneven Surface Part 66 Pin Head 67 Pin 68 First Sleeve 69 Second Sleeve 70 Grip Adjuster 71 Washer 72 Color 73 Pintail 74 Large Diameter Cylindrical Part 75 Stepped Part 76 Small Diameter Cylindrical Part 77 Bolt 78 Screw Hole 79 Nut 80 Ki -Up 81 recess 82 bottom surface 83 volts spout 84 sidewall surface 85 tongue 86 plate 87 holes 88 eyelet 89 eyelet 90 grout 91 nozzle

Claims (4)

[Claims] 1. A base plate attached to a bottom surface of a joint box attached to a lower end portion of a steel column is screwed and fixed to an independent foundation by anchor bolts, and an end plate welded to a steel foundation beam is screwed and fixed to a joint box. A steel-structured foundation beam construction structure characterized in that a steel-framed foundation beam is supported between the column bases composed of joint boxes. 2. The steel-framed beam construction structure according to claim 1, wherein the lower end portion of the steel frame column according to claim 1 is welded to each of the joint box and the base plate. 3. The steel frame foundation beam construction structure according to claim 1, wherein the end plate according to claim 1 is screwed and fixed to the joint box with a one-side bolt. 4. A bolt insertion hole for screwing and fixing an end plate to the upper end side of the joint box on each of the four side surfaces of the joint box according to claim 1, and an end plate screwed to the lower end side of the joint box. There is a bolt insertion hole for fixing, and the top end of one steel foundation beam with the end plate screwed and fixed to one side of the joint box, and the end plate to the other side of the joint box with the screw The steel-structured foundation beam construction structure according to claim 1, wherein there is a step between the top end of another steel-structured foundation beam.