CN219992839U - High-rise building glass curtain wall structure - Google Patents

Abstract

The utility model relates to a high-rise building glass curtain wall structure in the technical field of glass curtain wall installation, which comprises upright posts, cross beams and glass plates, wherein the upright posts are provided with first connecting pieces, the first connecting pieces are used for fixing the upright posts to a building main body, the cross beams are fixedly connected to two adjacent upright posts through second connecting pieces, fixing grooves are formed in the cross beams, embedded plates are fixedly connected to the edges of two opposite sides of each glass plate respectively, the cross section profile of each embedded plate is L-shaped, the embedded plates of two adjacent upper and lower glass plates are located in the fixing grooves, L-shaped openings of the two embedded plates are arranged in opposite directions, pressing plates are covered on the embedded plates of the two glass plates together, the pressing plates are located in the L-shaped openings of the two embedded plates at the same time, and the pressing plates are connected to the two embedded plates and the cross beams through bolts at the same time. The utility model can reduce the operation difficulty of installing the glass curtain wall in the high-rise building and improve the installation efficiency.

Description

High-rise building glass curtain wall structure

Technical Field

The utility model relates to the field of glass curtain wall installation technology, in particular to a high-rise building glass curtain wall structure.

Background

The glass curtain wall is a building exterior or under the action of a main structure which can have certain displacement capacity relatively. The glass curtain wall is a beautiful and novel building wall decorating method and is also a remarkable characteristic of the times.

At present, the mounting mode of the glass curtain wall comprises the steps of firstly fixing the upright posts on a building main body through angle steel bolts, then fixing the cross beams on two adjacent upright posts through the angle steel bolts, arranging adhesive tapes on the upright posts and the cross beams, and then fastening and adhering the glass plates on the upright posts and the cross beams. After the buckle closure and cementation have a plurality of glass boards, install the clamp plate frame of many check corresponding a plurality of glass boards, reuse a plurality of bolts with clamp plate frame fixed mounting in stand and crossbeam, the clamp plate frame can make a plurality of glass boards install on stand and crossbeam more steadily.

Since the platen frame is provided corresponding to a plurality of glass plates, the volume and mass of the platen frame are large. When the glass curtain wall is installed at the high-rise part of the building, the pressing plate frame with larger volume and mass is required to be lifted, and the lifting difficulty and the danger coefficient are larger; and after the pressing plate frame is lifted to an accurate position and pressed to the upright posts and the cross beams, the position of a hanging basket which is in high-altitude operation is continuously changed along the transverse direction and the longitudinal direction, so that construction workers can conveniently connect all parts of the pressing plate frame to the upright posts and the cross beams through bolts, the operation difficulty is high, and the construction efficiency is reduced.

Disclosure of Invention

In order to reduce the operation difficulty of installing the glass curtain wall in a high-rise building and improve the installation efficiency, the utility model provides a high-rise building glass curtain wall structure.

The utility model provides a high-rise building glass curtain wall structure, which adopts the following technical scheme:

the utility model provides a high-rise building glass curtain wall structure, includes stand, crossbeam and glass board, the stand is provided with first connecting piece, first connecting piece is used for being fixed in the building main part with the stand, the crossbeam passes through second connecting piece fixed connection in two adjacent stands, the fixed slot has been seted up to the crossbeam, the relative both sides border of glass board is fixedly connected with gomphosis board respectively, the cross-section profile of gomphosis board is L shape, upper and lower adjacent two the gomphosis board of glass board all is located the fixed slot, two the L shape opening of gomphosis board sets up in opposite directions, two the joint cover is equipped with the clamp plate on the gomphosis board of glass board, the clamp plate is located the L shape opening of two gomphosis boards simultaneously, the clamp plate bolted connection is in two gomphosis boards and crossbeam simultaneously.

Through adopting above-mentioned technical scheme, stand passes through first connecting piece fixed mounting in building main part, and the crossbeam passes through second connecting piece fixed connection in two adjacent stands. One side plate surface of the embedded plates of the two glass plates arranged up and down is placed in the same fixing groove, and then the pressing plate is covered and connected through bolts, so that the glass plates arranged up and down are fixed on the same cross beam. At this time, the glass plates are installed above the upper glass plate, the embedded plates of the two uppermost glass plates are positioned in the same fixing groove, then the pressing plate is used for covering and pressing, and the bolts are used for fixing, and the operation is repeated according to the steps, so that the glass plates are firmly fixed on the cross beam from low to high. Because the pressing plate only fixes the edges of two adjacent glass plates, the pressing plate has smaller mass and volume, does not need to be hung and sent, can be installed and fixed by taking by workers, and greatly reduces the operation difficulty of installing the glass curtain wall in a high-rise building; meanwhile, the glass plates are sequentially installed from low to high, so that the position of the operation hanging basket is not required to be continuously changed along the transverse direction and the longitudinal direction, and the operation difficulty is greatly reduced although the operation times for installing the pressing plates are increased, and the installation efficiency of the glass curtain wall is improved.

Optionally, two spacing grooves have been seted up to the stand, two the spacing groove all extends along the length direction of stand and sets up, the other both sides border of glass board is fixedly connected with limiting plate respectively, two the limiting plate corresponds the card respectively and locates in the spacing groove of two adjacent stands.

Through adopting above-mentioned technical scheme, when covering glass board in stand and crossbeam, correspond two limiting plates of glass board and insert in the spacing groove of two adjacent stands to the displacement of the relative stand of restriction glass board and crossbeam emergence horizontal direction, in order to increase the stability of glass installation.

Optionally, the opposite both sides cell wall of spacing groove is fixedly connected with fastening strip respectively, the fastening strip is made by elastic material, the fastening groove has been seted up respectively to the opposite both sides wall of limiting plate, two the fastening strip is blocked respectively and is located two fastening inslot.

Through adopting above-mentioned technical scheme, when inserting two limiting plates correspondingly two spacing grooves, two fastening strips can correspond to squeeze into two fastening inslot to the relative spacing groove of restriction limiting plate breaks away from, makes when covering glass board in stand and crossbeam, and can be preliminarily fixed in the stand to glass board, and does not need to support the glass board constantly and install the clamp plate, has further reduced glass curtain wall's installation degree of difficulty, has also further increased glass installation's stability.

Optionally, an adhesive layer is disposed on the wall of the fixing groove, and the two fitting plates are adhered to the adhesive layer.

Through adopting above-mentioned technical scheme, when covering glass board in stand and crossbeam, the embedding board all bonds in the adhesive layer for the glass board can be preliminarily fixed in the crossbeam, further increases the preliminary fastness that is fixed in stand and crossbeam of glass board, so that the workman can further liberate both hands when installing glass board, when not supporting the glass board, also can not appear the condition that the glass board dropped, so that install the clamp plate, when making the glass curtain wall installation degree of difficulty reduced, increased the security.

Optionally, the pressing plate is provided with a shielding strip, the shielding strip covers the pressing plate, and the shielding strip is fixedly installed on two adjacent upright posts simultaneously.

Through adopting above-mentioned technical scheme, shelter from strip to clamp plate and set up in a plurality of bolts of clamp plate and shelter from, when promoting glass curtain wall's sight for the junction of bolt and clamp plate is difficult for receiving the wind and blows insolatedly, thereby reduces the bolt and takes place corrosion and takes place not hard up possibility relatively the clamp plate.

Optionally, the pressing plate is fixedly connected with an insulation board.

Through adopting above-mentioned technical scheme, the heat transfer between heated board pair clamp plate and gomphosis board and the crossbeam hinders to a certain extent to reduce the glass board and link up the degree that the installation department appears the heat bridge, in order to promote the thermal-insulated effect of heat preservation to the building.

Optionally, the first connecting piece includes two angle steel, a plurality of embedded bolt and a plurality of overcoat and threaded connection in the nut of embedded bolt, and is a plurality of embedded bolt all is used for pre-buried in the building main part, two angle steel is bolted connection respectively in the opposite both sides wall of stand, two the connecting hole has been seted up to the angle steel, and is a plurality of embedded bolt corresponds respectively wears to locate two connecting holes, and is a plurality of the nut all contradicts in the angle steel one side lateral wall that the embedded bolt was kept away from.

Through adopting above-mentioned technical scheme, a plurality of pre-buried bolts are pre-buried in building main part, and the nut makes the angle steel connect in building main part firmly, and two at least angle steel make the stand be fixed in building main part firmly to support glass board more steadily, in order to promote glass curtain wall's steadiness and security.

Optionally, the second connecting piece includes two fixed angle steel, two fixed angle steel is bolted connection respectively in the both ends of crossbeam, two fixed angle steel corresponds bolted connection respectively in two adjacent stands.

Through adopting above-mentioned technical scheme, two fixed angle steel make the crossbeam connect in two adjacent stands firmly to make the crossbeam support glass board more steadily, further promote glass curtain wall's steadiness and security.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. because the pressing plate only fixes the edges of two adjacent glass plates, the pressing plate has smaller mass and volume, does not need to be hung and sent, can be installed and fixed by taking by workers, and greatly reduces the operation difficulty of installing the glass curtain wall in a high-rise building; meanwhile, as the glass plates are sequentially installed from low to high, the position of the operation hanging basket is not required to be continuously changed along the transverse direction and the longitudinal direction, and the operation difficulty is greatly reduced although the operation times for installing the pressing plates are increased, so that the installation efficiency of the glass curtain wall is also improved;

2. when covering glass board in stand and crossbeam, the embedding board all bonds in the adhesive layer for the glass board can be preliminarily fixed in the crossbeam, further increases the fastness that the glass board is preliminarily fixed in stand and crossbeam, so that the workman can further liberate both hands when installing the glass board, when not holding the glass board, also can not appear the condition that the glass board dropped, so that install the clamp plate, when making the glass curtain wall installation degree of difficulty reduced, increased the security.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Fig. 2 is a schematic view of a first partial structure of an embodiment of the present utility model.

Fig. 3 is a second partial structure diagram of an embodiment of the present utility model.

Fig. 4 is a first cross-sectional structural schematic of an embodiment of the present utility model.

Fig. 5 is an enlarged schematic view of the portion a in fig. 4.

Fig. 6 is a second cross-sectional structural schematic of an embodiment of the present utility model.

Fig. 7 is an enlarged schematic view of the portion B in fig. 6.

Reference numerals: 1. a column; 11. a limit groove; 12. a fastening strip; 2. a cross beam; 21. a fixing groove; 22. an adhesive layer; 23. a buckling groove; 3. a glass plate; 31. a mounting frame; 32. glass; 4. a first connector; 41. connecting angle steel; 42. embedding bolts; 43. a nut; 5. a second connector; 51. fixing angle steel; 6. an embedded plate; 7. a pressing plate; 71. a shielding strip; 72. a thermal insulation board; 8. a limiting plate; 81. fastening grooves.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-7.

The embodiment of the utility model discloses a glass curtain wall structure of a high-rise building. Referring to fig. 1 and 2, a high-rise building glass curtain wall structure includes uprights 1, cross members 2 and glass panels 3. The upright 1 is provided with a first connecting piece 4, and the first connecting piece 4 comprises two connecting angle steels 41, a plurality of embedded bolts 42 and a plurality of nuts 43, wherein the embedded bolts 42 are all used for being embedded in a building main body.

Referring to fig. 1 and 2, the connecting angle 41 has an L-shaped plate structure, one side plate surfaces of the two connecting angle 41 are respectively connected to two opposite side walls of the upright 1 by bolts, and L-shaped openings of the two connecting angle 41 are far away from each other. The other side face of the two connecting angle steels 41 is provided with connecting holes, and a plurality of embedded bolts 42 are correspondingly penetrated in the two connecting holes respectively. The nuts 43 are respectively sleeved and connected with the embedded bolts 42 in a threaded manner, and the nuts 43 are abutted against the side wall of the connecting angle steel 41, which is far away from the embedded bolts 42.

Referring to fig. 1 and 3, the lower sidewalls of both ends of the cross beam 2 are provided with fastening grooves 23, and the cross beam 2 is provided with a second connection member 5. The second connecting piece 5 comprises two fixed angle steels 51, and the fixed angle steels 51 are also in an L-shaped plate-shaped structure. One side plate surface bolt of the two fixed angle steels 51 is connected to the two adjacent upright posts 1 respectively corresponding to the bolts, and the L-shaped openings of the two fixed angle steels 51 are vertically downwards arranged. The two fixed angle steels 51 are respectively positioned in the two buckling grooves 23, and the other side plate surfaces of the two fixed angle steels 51 are connected with the groove walls of the buckling grooves 23 through bolts. The cross beam 2 is vertically arranged on the upright 1, and the glass plate 3 is simultaneously connected with the upright 1 and the cross beam 2.

The plurality of embedded bolts 42 are embedded in the building main body, the nuts 43 enable the connecting angle steel 41 to be firmly connected to the building main body, and the at least two connecting angle steels 41 enable the upright posts 1 to be firmly fixed to the building main body so as to stably support the glass plate 3, so that the stability and the safety of the glass 32 curtain wall are improved. The two fixed angle steels 51 enable the cross beam 2 to be firmly connected to the two adjacent uprights 1, so that the cross beam 2 can more stably support the glass plate 3, and the stability and safety of the glass 32 curtain wall are further improved.

Referring to fig. 3, 4 and 5, a fixing groove 21 is formed in a side wall of the cross beam 2, the fixing groove 21 extends along the length of the cross beam 2, and an opening direction of the fixing groove 21 is horizontally arranged. The glass plate 3 includes a mounting frame 31 and glass 32, and the glass 32 is fixedly connected to the mounting frame 31. The two opposite side edges of the mounting frame 31 are fixedly connected with the embedded plates 6 respectively, the cross section outline of the embedded plates 6 is L-shaped, the embedded plates 6 of the two mounting frames 31 which are adjacent up and down are all positioned in the fixed groove 21, and the L-shaped openings of the two embedded plates 6 are arranged in opposite directions.

Referring to fig. 5, the engaging plates 6 of the two glass plates 3 are covered with a pressing plate 7, and the pressing plate 7 is extended in the longitudinal direction of the fixing groove 21. The pressing plate 7 is simultaneously positioned in the L-shaped openings of the two jogged plates 6, and the pressing plate 7 is simultaneously connected with the two jogged plates 6 and the cross beam 2 through bolts.

By placing one side plate surface of the fitting plate 6 of two glass plates 3 arranged up and down in the same fixing groove 21, and then covering the upper pressing plate 7 and performing bolting, the glass plates 3 arranged up and down are all fixed to the same cross beam 2. At this time, the glass plate 3 is mounted above the upper glass plate 3, the engaging plates 6 of the two uppermost glass plates 3 are positioned in the same fixing groove 21, and then the pressing plate 7 is used for covering and bolting, and the operation is repeated in this step, so that the glass plates 3 are firmly fixed to the cross beam 2 from low to high.

Because the pressing plate 7 only fixes the edges of the two adjacent glass plates 3, the pressing plate 7 has smaller mass and volume, does not need to be hung, can be installed and fixed by taking by workers, and greatly reduces the operation difficulty of installing the glass 32 curtain wall on a high-rise building; meanwhile, since the glass plates 3 are sequentially installed from low to high, the position of the operation basket is not required to be continuously changed along the transverse direction and the longitudinal direction, and the operation difficulty is greatly reduced although the operation times for installing the pressing plate 7 are increased, so that the installation efficiency of the glass 32 curtain wall is also improved.

Referring to fig. 1, 6 and 7, in order to further increase the stability of the installation of the glass 32, the upright 1 is provided with two limit grooves 11. Both limit grooves 11 extend along the length direction of the upright 1, and the opening direction of the limit grooves 11 is parallel to the opening direction of the fixing groove 21. The other two side edges of the mounting frame 31 are respectively and fixedly connected with a limiting plate 8, and the limiting plates 8 are perpendicular to the plane where the mounting frame 31 is located. The two limiting plates 8 are respectively and correspondingly clamped in the limiting grooves 11 of the two adjacent upright posts 1.

When the glass plate 3 is buckled on the upright posts 1 and the cross beam 2, the two limiting plates 8 of the glass plate 3 are correspondingly inserted into the limiting grooves 11 of the two adjacent upright posts 1, so that the glass plate 3 is limited to displace horizontally relative to the upright posts 1 and the cross beam 2, and the mounting stability of the glass 32 is improved.

Referring to fig. 1, 6 and 7, after the constructor buckles the mounting frame 31 on the fixing groove 21 and the limiting groove 11, the constructor needs to stably connect the mounting frame 31 to the cross beam 2 by the mounting pressing plate 7, and the constructor is required to hold the glass 32 by hand all the time in the process of mounting the pressing plate 7 so as to position the glass 32 and prevent the glass 32 from falling, but the constructor has more manpower and lower construction efficiency. The two opposite side groove walls of the limiting groove 11 are respectively fixedly connected with a fastening strip 12, the fastening strips 12 are made of elastic materials such as silica gel and plastics, and the fastening strips 12 extend along the length direction of the limiting groove 11. The opposite side walls of the limiting plate 8 are respectively provided with a fastening groove 81, the fastening grooves 81 extend along the length direction of the limiting plate 8, and the two fastening strips 12 are respectively correspondingly clamped in the two fastening grooves 81.

When inserting two limiting plates 8 correspondingly two spacing grooves 11, because the fastening strip 12 is made by elastic material, two fastening strips 12 can be correspondingly extruded into two fastening grooves 81 to restrict the relative spacing groove 11 of limiting plate 8 to break away from, make when covering glass plate 3 in stand 1 and crossbeam 2, glass plate 3 can be preliminarily fixed in stand 1, make and support glass plate 3 and install clamp plate 7 constantly, further reduced the installation degree of difficulty of glass 32 curtain wall, also further increased the stability of glass 32 installation.

Referring to fig. 5, in order to further reduce the difficulty of installing the glass 32 curtain wall, the wall of the fixing groove 21 is provided with an adhesive layer 22, the adhesive layer 22 is extended along the length direction of the fixing groove 21, and the two embedded plates 6 are adhered to the adhesive layer 22. When covering glass board 3 in stand 1 and crossbeam 2, gomphosis board 6 all bonds in adhesive layer 22 for glass board 3 can be preliminarily fixed in crossbeam 2, and further the fastness that glass board 3 was preliminarily fixed in stand 1 and crossbeam 2, so that the workman can further liberate both hands when installing glass board 3, when not holding glass board 3, also can not appear glass board 3 condition that drops, so that install clamp plate 7 for when reducing glass 32 curtain installation degree of difficulty, increased the security.

Referring to fig. 2 and 5, in order to make the connection between the glass plate 3 and the cross beam 2 more stable and durable, the pressing plate 7 is provided with a shielding strip 71, the shielding strip 71 extends along the length direction of the pressing plate 7 and covers the pressing plate 7, and two ends of the shielding strip 71 are respectively connected to two adjacent upright posts 1 by corresponding bolts. The shielding strip 71 shields the pressing plate 7 and a plurality of bolts arranged on the pressing plate 7, so that the connection part of the bolts and the pressing plate 7 is not easy to be blown by wind and sun during the improvement of the ornamental value of the glass 32 curtain wall, the possibility that the bolts are rusted and loose relative to the pressing plate 7 is reduced, and the connection of the glass plate 3 and the cross beam 2 is more stable and durable.

Referring to fig. 5, the glass 32 of the glass 32 curtain wall has a good heat insulation effect, but the heat bridge is easy to occur at the joint installation position of the glass plates 3 because the pressing plate 7, the embedded plate 6 and the cross beam 2 are all of steel structures, so that the heat insulation effect on the building is poor. The side wall of one side of the pressing plate 7, which is close to the cross beam 2, is fixedly connected with an insulation board 72, and the insulation board 72 extends along the length direction of the pressing plate 7.

The heat-insulating plate 72 blocks heat transfer between the pressing plate 7 and the embedded plate 6 and the cross beam 2 to a certain extent so as to reduce the extent of occurrence of a heat bridge at the joint installation position of the glass plate 3 and improve the heat-insulating effect on the building.

The implementation principle of the high-rise building glass curtain wall structure provided by the embodiment of the utility model is as follows: the upright posts 1 are firmly installed on the building main body through the connecting angle steel 41 and the embedded bolts 42, and the cross beam 2 is firmly and fixedly connected with the two adjacent upright posts 1 through the fixed angle steel 51.

By placing one side plate surface of the fitting plate 6 of two glass plates 3 arranged up and down in the same fixing groove 21, and then covering the upper pressing plate 7 and performing bolting, the glass plates 3 arranged up and down are all fixed to the same cross beam 2. At this time, the glass plate 3 is mounted above the upper glass plate 3, the engaging plates 6 of the two uppermost glass plates 3 are positioned in the same fixing groove 21, and then the pressing plate 7 is used for covering and bolting, and the operation is repeated in this step, so that the glass plates 3 are firmly fixed to the cross beam 2 from low to high.

Because the pressing plate 7 only fixes the edges of the two adjacent glass plates 3, the pressing plate 7 has smaller mass and volume, does not need to be hung, can be installed and fixed by taking by workers, and greatly reduces the operation difficulty of installing the glass 32 curtain wall on a high-rise building; meanwhile, since the glass plates 3 are sequentially installed from low to high, the position of the operation basket is not required to be continuously changed along the transverse direction and the longitudinal direction, and the operation difficulty is greatly reduced although the operation times for installing the pressing plate 7 are increased, so that the installation efficiency of the glass 32 curtain wall is also improved.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. A high-rise building glass curtain wall structure which is characterized in that: including stand (1), crossbeam (2) and glass board (3), stand (1) are provided with first connecting piece (4), first connecting piece (4) are used for being fixed in building main part with stand (1), crossbeam (2) are through second connecting piece (5) fixed connection in adjacent two stand (1), fixed slot (21) have been seted up to crossbeam (2), the both sides border that glass board (3) are relative fixedly connected with gomphosis board (6) respectively, the cross-section profile of gomphosis board (6) is L shape, upper and lower adjacent two gomphosis board (6) of glass board (3) all are located fixed slot (21), two the L shape opening of gomphosis board (6) sets up in opposite directions, two jointly cover on gomphosis board (6) of glass board (3) is equipped with clamp plate (7), clamp plate (7) are located the L shape opening of two gomphosis boards (6) simultaneously, clamp plate (7) are bolted connection in two gomphosis boards (6) and crossbeam (2) simultaneously.

2. A high-rise building glass curtain wall structure according to claim 1, wherein: two spacing grooves (11) have been seted up to stand (1), two spacing grooves (11) all extend along the length direction of stand (1) and set up, glass board (3) both sides border is fixedly connected with limiting plate (8) respectively in addition, two limiting plate (8) correspond respectively in the spacing groove (11) of card locating two adjacent stands (1).

3. A high-rise building glass curtain wall structure according to claim 2, wherein: the two opposite side walls of the limiting groove (11) are respectively fixedly connected with a fastening strip (12), the fastening strips (12) are made of elastic materials, the two opposite side walls of the limiting plate (8) are respectively provided with a fastening groove (81), and the two fastening strips (12) are respectively clamped in the two fastening grooves (81).

4. A high-rise building glass curtain wall structure according to claim 1, wherein: the groove wall of the fixing groove (21) is provided with an adhesive layer (22), and the two embedded plates (6) are adhered to the adhesive layer (22).

5. A high-rise building glass curtain wall structure according to claim 1, wherein: the pressing plate (7) is provided with a shielding strip (71), the shielding strip (71) covers the pressing plate (7), and the shielding strip (71) is fixedly installed on two adjacent upright posts (1) at the same time.

6. A high-rise building glass curtain wall structure according to claim 1, wherein: the pressing plate (7) is fixedly connected with an insulation board (72).

7. A high-rise building glass curtain wall structure according to claim 1, wherein: the first connecting piece (4) comprises two connecting angle steels (41), a plurality of embedded bolts (42) and a plurality of nuts (43) which are sleeved on the embedded bolts (42) in a threaded manner, wherein the embedded bolts (42) are all used for being embedded in a building main body, the connecting angle steels (41) are respectively connected with two opposite side walls of the upright column (1) in a bolt manner, the connecting angle steels (41) are respectively provided with connecting holes, the embedded bolts (42) are respectively correspondingly penetrated in the two connecting holes, and the nuts (43) are respectively abutted against one side wall of the connecting angle steels (41) far away from the embedded bolts (42).

8. A high-rise building glass curtain wall structure according to claim 1, wherein: the second connecting piece (5) comprises two fixed angle steels (51), the two fixed angle steels (51) are respectively connected to two ends of the cross beam (2) through bolts, and the two fixed angle steels (51) are respectively connected to two adjacent upright posts (1) through corresponding bolts.