Slot-like reinforced concrete column and erection method

FIELD: building, particularly cast-in-place building units, namely support structures.

SUBSTANCE: reinforced concrete column is formed in retained formwork and consists of upper support part and lower foundation part. Column includes reinforcement frame grouted with concrete mix and embedded members arranged in upper column part. Upper part of frame is located in retained formwork. Embedded members are in level with foundation slab marks and with flooring panel marks. Embedded members are formed as closed contours with stiffening ribs. Column is built in single- or multi-slot hollow. Projection of geometric retained formwork cross-section center coincides with that of lower reinforcement frame part. Arms of lower reinforcement form part extending in Y-axis direction are sized in accordance with given mathematical relation. Method of column erection involves forming single- or multi-slot hollow; producing reinforcement form with embedded members; forming retained formwork; installing above components; vertically placing the reinforcement frame in hollow so that frame is spaced a distance from hollow bottom; vertically adjusting and fixing upper column part to prevent transversal displacement thereof; grouting lower column part in bottom-top direction; grouting inner retained formwork area of upper column part. Hollow has dimensions measured in Y-axis direction determined from given relation.

EFFECT: possibility of simultaneous building erection in upward and downward directions relative ground level.

7 cl, 13 dwg

 

1. The technical field

The invention relates to the construction, especially in cramped conditions, in particular to the elements and methods of monolithic construction elements of buildings and structures, namely the reference concrete elements.

2. The level of technology

A device for transmitting pressure to the underlying dense soil layers formed by filling with concrete grooves in the soil cracks or sections of the trenches.

A device in the form of a vertical support to maintain the elements of the floors of buildings /Short Polytechnical dictionary. - M.: State. ed. technical-theoretical literature, 1956, s, Ref. "Column"/.

Famous columns with the elements of the pair in the levels overlap, completed with the formation of shells and columns not only circular but square. /Pat. Of the Russian Federation No. 2197578, IPC (7) E 04 1/18, 2000/.

For columns of arbitrary cross-section hallmark may be the combination of the projections of geometrical centers of cross sections of the upper and lower reinforcement frames in the reference and base parts of the columns, respectively.

Also known, reinforced concrete column containing seminolecounty concrete skeleton, including the valve and the communication nodes (reinforcement cage) (U.S. Pat. Of the Russian Federation No. 2094575, IPC (6) E 04 5/01, E 04 1/16, 1991).

A known method of construction of columns, including at the stop valve of the frames of the columns, installation of rebar cages, installation of formwork and concreting of frame elements (RU Application No. 99118847/03, 2001, E 04 1/16 In).

A known method of construction of columns, comprising the operations of manufacturing the reinforcement cage of the column, the device of the slit grooves in the ground and the erection of columns in the hollow of fixing the lower part of the monolithic columns. (Art, Weartime "the Construction of underground Parking for the Moscow academic musical theatre. Stanislavsky and Nemirovich-Danchenko (MAMT) " // "and Subway tunnels", 2002, №5, p.16-20, PI No. 77-5705 the Ministry of press of Russia, Scientific-technical and informational log Tunnel Association of Russia, Moscow).

A disadvantage of the known devices and methods of their installation - the impossibility of combining works of zero cycle works on construction elements of a building or structure above the zero mark.

Known also adopted by the applicant for the closest analogue (prototype in terms of method and devices) reinforced concrete column and the method of its construction, including the operation of the device extraction, manufacture of the reinforcement cage of the column with embedded items, non-removable formwork and installation, thus reinforcing cage of the column is immersed vertically in the recess at a distance from its bottom, vertical center and fix the upper part of the horizontal displacement, simonoseki is up with concrete from the bottom up the lower Foundation part of the column, and then the inner part of the permanent formwork upper bearing part of the column. Reinforced concrete column is made in non-removable formwork and consists of the upper bearing and the lower fundamental parts, includes seminolecounty concrete reinforcement cage, the upper part of which is placed in permanent formwork, embedded parts, placed in the upper part of the column in the levels of markers of the fundamental slab and marks slabs and made in the form of closed loops with ribs. (Yurkevich PB "Drilling columns - the new reality" // "the Underground world", 2001, No. 4, p.12-21, ISSN 0869-799X, TIMRA, Moscow). A disadvantage of the known device and method - a lack of accuracy in the vertical installation of the support and bearing elements.

3. The invention

3.1. The result of solving the technical problem

The technical effect of improving the accuracy of vertical when installing the supporting Foundation and structural design of a building or structure elements by centering reinforcing cage in the hollow.

The technical result - the construction of buildings, structures simultaneously up and down to below zero.

3.2. List of figures

Figure 1 presents an example design slotted concrete columns with the placement of non-removable casing with the closed contour p is amogolonova section in the upper bearing part of the column for the case of the erection of the columns in the single-slot recess; figure 2 - cross section "1-1" in figure 1 at the level of marks embedded parts with perpendicular edges; figure 3 - section 2-2 on figure 1 in the lower Foundation part of the column; figure 4 presents an example of the construction of monolithic reinforced concrete columns with placing permanent casing of rectangular cross-section in the upper bearing part of the column for the case of the erection of the columns in dvuhmetrovoy excavation Tauri section; figure 5 is a section "3-3 on figure 4 in the level of marks embedded parts with perpendicular edges; figure 6 is a section 4-4 on figure 4 in the lower Foundation part of the column; figure 7 presents an example design monolithic reinforced concrete columns with placing permanent casing of rectangular cross-section in the upper bearing part of the column for the case of the erection of the columns in the three-slit extraction of I-beam section; Fig - section "5-5" figure 7 in the level of marks embedded parts with perpendicular edges; figure 9 is a section 6-6" 7 in the lower Foundation part of the column; figure 10 presents an example of the construction of monolithic reinforced concrete columns with placing permanent casing of circular cross section in the upper bearing part of the column for the case of the erection of the columns in dvuhmetrovoy the hollow cross-section; figure 11 is a section 7-7 on figure 10 in the level of marks embedded parts with radial ribs; Fig - section "8-8" nafig in the lower Foundation part of the column; on Fig technological sequence of erection of the slotted concrete columns, where 1 is the upper bearing part of the column, 2 - non-removable formwork, 3 - lower Foundation part of the column, 4 - sealing, 5 - reinforcement cage (top), 6 - reinforcement cage (bottom), 7 - embedded plate with perpendicular ribs, 8 - embedded plate with radial ribs 9 device excavation in the ground, 10 - dive and centering reinforcing cage, 11 - monolithic columns, 12 - technology pipeline to perform broadening and cementation of the soil Foundation.

3.3. Distinctive features

Reinforced concrete column, made in permanent formwork and consisting of an upper bearing and a lower fundamental parts including seminolecounty concrete reinforcement cage, the upper part of which is placed in permanent formwork, embedded parts, placed in the upper part of the column in the levels of markers of the fundamental slab and marks slabs and made in the form of closed loops with ribs, in contrast to the known, performed in a single or multislot the recess, and the projection of geometric center of the cross section, non-removable formwork combined with the projection of the geometric center of the cross section of the lower part of the reinforcing cage, and the sizes of veto the lower part reinforcing cage along the Y-axis are taken from the condition: A ki<Abithe value of Ωy=2(εyyy), where the Y - axis passing through the geometric center of the cross section of the lower part of the frame, Andki- basic sizes of branches of the lower part of the frame columns along the Y-axis, Abicorresponding basic dimensions of the slit grooves along the Y-axis, the index of the size related to the frame, the index of the size related to the notch-gap, i is the number of dimensions (for differences attributed either to the frame or to the groove-slit sizes specified in sections 3, 6, 9, 12), εy- component of the eccentricity of the projection combined geometric center of the one-piece reinforcing cage of the column and the projection of its center of mass in the plane of the top of the suspension reinforcement cage of the column along the Y axis, αy- the greatest deviation of the plane of the slit grooves from the vertical along the Y axis, βy- deviation of the geometric center of the cross section of the notches in the plan along the Y-axis in the plane of the suspension, the sizes of the branches of the lower part of the reinforcing cage along the X-axis are taken from the condition:ki<bithe value of Ωx=2(εxxx), where X - axis passing through the geometric center of the cross section of the lower part of the frame, perpendicular to the axis Y, InKi- basic sizes of branches of the lower part of the frame columns along the X-axis, In - basic dimensions of the slit grooves along the X-axis, εx- component of the eccentricity of the projection combined geometric center of the one-piece reinforcing cage of the column and the projection of its center of mass in the plane of the top of the suspension reinforcement cage of the column along the X-axis, αx- the greatest deviation of the plane of the slit grooves from the vertical along the X-axis, βx- deviation of the geometric center of the cross section of the notches in the plan along the X-axis in the plane of the suspension.

Reinforcement cage of reinforced concrete columns made of steel, non-removable formwork made of arbitrary cross-section, symmetrical with respect to axes X, Y.

Permanent formwork placed in the upper bearing part of the column. Part of the reinforcing cage, placed in the lower Foundation part of the column, are connected by the imposition of "overlap" with the part of the reinforcing cage, placed in the upper bearing part with the incorporation of the reinforcing elements of the carcass.

The portion sizes of the reinforcement cage, placed in the upper bearing part of the column, equal to or less than the internal dimensions of permanent formwork. The main dimensions along the axes X and Y of the branches of the lower part of the reinforcing cage, placed in the lower Foundation part of the column, equal to or greater than the major exterior dimensions of the permanent formwork.

In contrast to the known method, vozvedenie the columns is carried out in single or multislot recess, and the notch suit in the soil with the size along the Y-axis, taken from the condition: Abi>AndKi+2(εyyyand along the X-axis taken from the condition Inbi>Ki+2(εxxx), where the Y - axis passing through the geometric center of the cross section of the lower part of the frame, X - axis passing through the geometric center of the cross section of the lower part of the frame, perpendicular to the Y-axis, AndKi- basic sizes of branches of the lower part of the frame columns along the Y-axis, InKi- basic sizes of branches of the lower part of the frame columns along the X-axis, Andbicorresponding basic dimensions of the slit grooves along the Y axis, Inbi- basic dimensions of the slit grooves along the X-axis, the index of the size related to the frame, the index of the size related to the notch-gap, i is the number of size εyand εx- components of the eccentricity of the projection combined geometric center of the one-piece reinforcing cage of the column and the projection of its center of mass in the plane of the top of the suspension of the column reinforcing cage along the principal axes Y and X, respectively, εyand εx- the greatest deviation of the plane of the slit grooves from the vertical along the principal axes Y and X, respectively, βyand βx- deviation of the geometric center of the cross section of the notches in the plan, the Dol axes Y and X in the plane of the suspension, respectively.

When this reinforcement cage of the column is immersed vertically in the recess with a clearance from the bottom of not less than 40 cm

After seminolecounty exercise broadening and cementation of the soil Foundation, through the manufacturing pipeline, placed inside of the reinforcement cage, the space between the permanent casing and the walls of the recesses in the upper bearing part of the fill of zernistym material. The column is arranged as follows.

Reinforced concrete column (1, 4, 7, 10) is made with the possibility of installing it in the notch in the soil, contains seminolecounty concrete reinforcing cage (5, 6) and a communication made in the form of inserts (7 or 8) column having a closed contour with the ribs. The column is divided into an upper part (1) (reference under part overlap) and lower part (3) (base support) with the main dimensions AndKiand InKithe branches of the lower part of the reinforcing cage along axes Y and X, respectively, of the reinforcing frame in the upper bearing part is placed in a non-removable formwork (2). The upper and lower parts of the reinforcing frame in advance or at the level of forsajta on the installation link "overlap" in the seal (4) to provide crushing the upper part of the column in the lower Foundation part after seminolecounty.

The column is performed with the main dimensions of the branches of the lower h is STI reinforcing cage along the main axis And Y Ki<Abithe value of Ωx=2(εyyyand along the major axis XKi<bithe value of Ωx=2(εxxx) to compensate for the eccentricity of the installation of one-piece reinforcing cage of the column and compensation of defects excavation cracks gouges in the soil upon its construction, which provides the precision of a column in the design position.

The upper part of the column reinforcing cage (5) is collected from the business longitudinal and distribution of rods and practically no different from the reinforcing cage traditional columns.

For communication slit columns with floor slabs underground floors and base plate in the reinforcement cage of the upper part (5) is installed embedded parts (7 or 8) in the form of a rectangular or round tubes with perpendicular or radially welded to the ribs or in the form of pipes other arbitrary shape with ribs.

The dimensions of the embedded pipes smaller dimensions, non-removable casing (2) to double the width of the support contour cutting console, allowing the support of floors and base plate for slit column on the principle of "concrete on concrete" without considering the work of non-removable casing (2), which provides the necessary spojenych structures fire resistance of load-bearing structures. The length of the embedded parts (7 or 8) equals not less than the sum of the thickness of adjacent nodes in communication with the slit column overlap (base plate) and three times the size of the mounting tolerance of the height of the column reinforcing cage (3×50 mm).

Perpendicularly or radially welded to the mortgage tube ribs compensate for the weakening of the bearing capacity of the column during cutting of the concrete when performing reference mortise consoles communication with the floors and the base plate. The ribs also serve to coaxially coupling the longitudinal operating rod of the upper part of the column reinforcing cage (5) between an electric method.

The upper part of the column reinforcing cage (5) in the bottom of the seal (4) in the lower part of the column reinforcing cage (6) is rigidly fixed in permanent formwork (2) welding of internal stoparea device.

The lower part of the column reinforcing cage (6) is collected from the business longitudinal and distribution of rods and rigidly connects lap-welded joints with permanent formwork (2) in the area of the seal (4) before installation in the hollow one-piece reinforcing cage.

Inside the upper and lower parts (5, 6) of the column reinforcing cage is laid end-to-end process pipe (12), the top of which is displayed above the head waswo the ima columns, and down to the lower plane of the lower part of the reinforcing cage (6) and temporarily muted wooden or plaster stopper. Process pipe (12) is used to check the inclinometer vertical position of one-piece reinforcing cage on the installation, subsequent to the monolithic columns of individual qualifying exploration, washing the base of the slotted columns from cuttings, as well as education widened soles and cementation of the soil Foundation.

Individual lookup exploration, produced through the process pipe (12) at the base of the slit of the column, allows you to assess the real geological structure and bearing capacity of soils directly at its base, if necessary, to take measures to increase the bearing capacity, to eliminate the risk of using slotted columns during the construction of buildings at the same time up and down below zero.

The method of construction of the slit of the column.

The method of construction slotted column combines the operations of manufacturing and installation of columns in the design position, allows centering her one-piece reinforcing cage to compensate for the eccentricity of the projection of the geometric axis and the projection axis of the center of mass.

The method involves excavation excavation (9) with the main dimensions along the Y-axis Andbi>AndKi the value of Ωx=2(εyyyand along the major axis Xbi>Kithe value of Ωx=2(εxxx) taking into account possible deviations of the slit recesses in plan and from the vertical, as a rule, under the protection of the mud.

The design of the communication slit columns with overlapping underground floors and the base plate defines a tolerance altitudinal position of the head of the column after the erection of ±50 mm

When using the device dredging mud after the excavation is performed to replace the spent mud on freshly prepared.

Immersion (10) one-piece reinforcing cage (2, 5, 6) or parts separately (first 6, then 2, 5 with connection by welding on the Assembly level forsajta) in the recess is avtomobilniy the crane necessary for these purposes, characteristics with the sign in the plane of the suspension (level forsajta) and the gap between the bottom of the reinforcing cage and the bottom of the recess is not less than 40 cm

Then head over to the upper part of the reinforcing cage (2, 5) of the column is set inventory centering jig equipped with a system of horizontal and vertical hydraulic jacks. Support frame centering of the conductor temporarily rigidly fixed to forsake.

<> Centering (11) hung out one-piece reinforcing cage (2, 5, 6) is the horizontal hydraulic jacks conductor in plan and vertical height, and the whole frame is in the vertical position under the action of its own gravity (status "plumb"), freely hanging in the hole in the ground with large main dimensions and the vertical hydraulic jacks are used only to correct skew signs. Compensation of eccentricity of the projection of the geometric axis and the projection axis of the center of mass is achieved by the design of the reinforcing cage (5, 6).

The final centering operation is to check the verticality of the one-piece reinforcing cage (2, 5, 6) or the upper part (2, 5) using an inclinometer installed in the process line (12).

The monolithic (11) columns is carried out continuously by the method of vertically moving within the reinforcing cage (5, 6) bitonality pipe with parallel bridging (filling) granular material (crushed stone or gravel fractions of 40-70 mm) gap between the permanent casing (2) and walls of the excavation in the ground. Backfill begins after seminolecounty the lower part of the reinforcing cage (6) and parallel to the monolithic upper part of the reinforcing cage (5). Pre rigidly fixed on forgoteveryday part of the reinforcing cage (2, 5) inventory and removed the centering jig.

After the construction of the slit of the column through the process piping, the ends of which at the time seminolecounty columns muted wooden or plaster plugs, is an individual lookup exploration at its base.

This additional exploration in addition to the stated technical result allows to eliminate the risk of invalid precipitation of the column due to the mismatch between the actual geological conditions adopted in the project, and to make the right decision in construction conditions as needed and the magnitude of the broadening and cementation of the soil base of the column to ensure the bearing capacity of the construction of buildings and structures simultaneously up and down to below zero.

Process pipe (12), displayed below the plane of the lower part of the reinforcing cage (6), allows the washing of the sludge settled at the bottom of the excavation during excavation and remaining at the base of the lower Foundation part of the column after seminolecounty columns, and perform, at least, cementing the moulding of the base, unless you want to run broadening or larger cementing operations.

The method of construction provides accuracy slotted concrete columns with a deviation of its axis about the vertical of not more than 1:500 and ± 5 mm in plan. 4. The possibility of carrying out the invention.

The combination in a single structure functions of the base member and vertical support member of a building or structure and method of erecting the pillars improve the accuracy of mounting, and provide greater flexibility and allow at the same time (in parallel), and/or sequentially (in any order) to perform work above and below ground zero mark.

Reinforced concrete column and method of construction does not require special tooling and any special techniques on the construction of columns.

1. Reinforced concrete column, made in permanent formwork and consisting of an upper bearing and a lower fundamental parts including seminolecounty concrete reinforcement cage, the upper part of which is placed in permanent formwork, embedded parts, placed in the upper part of the column in the levels of markers of the fundamental slab and marks slabs and made in the form of closed loops with ribs, characterized in that the column is made in single or multislot the recess, and the projection of geometric center of the cross section, non-removable formwork combined with the projection of the geometric center of the cross section of the lower part of the reinforcing cage, and sizes of branches of the lower h is and reinforcing cage along the Y-axis are taken from the condition:

Aki<the abi on the value Ωy=2(εyyy),

where the Y - axis passing through the geometric center of the cross section of the lower part of the frame,

Aki - basic sizes of branches of the lower part of the frame columns along the Y-axis,

The abi is the corresponding basic dimensions of the slit grooves along the Y-axis,

to - the index of the size related to the frame,

in - index of the size related to the notch slit,

i is the number of size,

εy- component of the eccentricity of the projection combined geometric center of the one-piece reinforcing cage of the column and the projection of its center of mass in the plane of the top of the suspension reinforcement cage of the column along the Y-axis,

αy- the greatest deviation of the plane of the slit grooves from the vertical along the Y-axis,

βy- deviation of the geometric center of the cross section of the notches in the plan along the Y-axis in the plane of the suspension,

the sizes of the branches of the lower part of the reinforcing cage along the X-axis are taken from the condition

UK<W on value ΩX=2(εXXX),

where the X - axis passing through the geometric center of the cross section of the lower part of the frame perpendicular to the Y-axis,

VK - basic sizes of branches of the lower part of the frame columns along the X-axis,

VW - based the major dimensions of the slits of the notches along the X-axis,

εx- component of the eccentricity of the projection combined geometric center of the one-piece reinforcing cage of the column and the projection of its center of mass in the plane of the top of the suspension reinforcement cage of the column along the X-axis,

αx- the greatest deviation of the plane of the slit grooves from the vertical along the X-axis,

βx- deviation of the geometric center of the cross section of the notches in the plan along the X-axis in the plane of the suspension.

2. Reinforced concrete column according to claim 1, wherein the reinforcing frame is made of steel, non-removable formwork made of arbitrary cross-section, symmetrical with respect to axes X, Y.

3. Reinforced concrete column according to claim 1, characterized in that the permanent formwork placed in the upper bearing part of the column, part of the reinforcing cage, placed in the lower Foundation part of the column, are connected by the imposition of "overlap" with the part of the reinforcing cage, placed in the upper bearing part, with the incorporation of the reinforcing elements of the carcass.

4. Reinforced concrete column according to claim 3, characterized in that the portion sizes of the reinforcement cage, placed in the upper bearing part of the column, equal to or less than the internal dimensions of permanent formwork, main dimensions along the axes X and Y of the branches of the lower part of the reinforcing cage, placed in the lower Foundation part of the colon is s, equal to or greater than the major exterior dimensions of the permanent formwork.

5. The method of construction of reinforced concrete columns in the dirt excavation, consisting of the upper bearing and the lower fundamental parts including a device excavation, operations of manufacturing the reinforcement cage of the column with embedded items, non-removable formwork and installation, thus reinforcing cage of the column is immersed vertically in the recess at a distance from its bottom, vertical center and fix the upper part of the horizontal displacement, zamonolichivajut concrete from the bottom up the lower Foundation part of the column and the inner part of the permanent formwork upper bearing part of the column, characterized in that the construction of the columns is carried out in single or multislot recess, and the recess are held in the soil with the size along the Y-axis, taken from the condition

The abi>Aki+2(εyyy),

and along the X-axis taken from the condition W>Wk+2(εxxx),

where the Y - axis passing through the geometric center of the cross section of the lower part of the frame,

X - axis passing through the geometric center of the cross section of the lower part of the frame perpendicular to the Y-axis,

Aki - basic sizes of branches of the lower part of the frame columns along the Y-axis,

VK - basic sizes of branches of the lower part of the frame to the Onna along the X-axis,

The abi is the corresponding basic dimensions of the slit grooves along the Y-axis,

W - basic dimensions of the slit grooves along the X-axis,

to - the index of the size related to the frame,

in - index of the size related to the notch slit,

i is the number of size,

εyand εx- components of the eccentricity of the projection combined geometric center of the one-piece reinforcing cage of the column and the projection of its center of mass in the plane of the top of the suspension of the column reinforcing cage along the principal axes Y and X, respectively,

αyand αx- the greatest deviation of the plane of the slit grooves from the vertical along the principal axes Y and X, respectively,

βyand βx- deviation of the geometric center of the cross section of the notches in the plan along axes Y and X in the plane of the suspension, respectively.

6. The method according to claim 5, characterized in that the reinforcement cage of the column is immersed vertically in the recess with a clearance from the bottom of not less than 40 cm

7. The method according to claim 5, characterized in that after seminolecounty exercise broadening and cementation of the soil Foundation, through the manufacturing pipeline, placed inside of the reinforcement cage, the space between the permanent casing and the walls of the recesses in the upper bearing part of the granular fill material.



 

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10 cl, 9 dwg

FIELD: building, particularly for constricting pile foundations in soft ground.

SUBSTANCE: method involves forming well, dipping two thin-walled pipes with opened ends in well and forming pile body. Lower pipe ends are connected one to another by weld seam, upper ends thereof are connected by jig. Double-walled conical hollow pile is formed by supplying compressed air between pipe walls and by filling annular space with concrete.

EFFECT: reduced labor inputs and increased load-bearing capacity of pile foundation.

2 cl, 2 ex, 9 dwg

FIELD: building and construction.

SUBSTANCE: method includes serial vibration immersion of inventory elements into soil, which are mated between each other, and their following vibration extraction with concurrent filling of hollow in soil with concrete mixture. Inventory elements are used, which are made in form of profiled posts, having gates in lower portion, closed during immersion in soil and opened by flexible links during extraction of elements from soil and feeding of concrete mixture. At the same time profiled elements of longitudinal walling have lesser length, than length of profiled elements of vertical posts, which during immersion are pressed in for greater depth than profiled elements of longitudinal walling. First, profiled element of longitudinal walling is immersed, and then via guiding conductor profiled element of vertical post is densely mated to it and is than immersed. Concrete mixture is loaded in profiled element of longitudinal walling with its extraction with open gates and extracted element is immersed in next position adjacently to previous profiled element of vertical post being in soil. Concrete mixture is loaded into profiled element of vertical post during its extraction with open gates and extracted element if immersed into following position with concurrent mating to previous profiled element of longitudinal walling with use of guiding conductor. Then inventory elements are immersed again. Device for construction of bearing-limiting structures in soil includes crane or pile driver with vertical guide, vibration immersion driver and at least two inventory hollow elements. Inventory elements are made in form of profiled elements of longitudinal walling and profiled elements of vertical posts. Profiled elements of longitudinal walling have length less than length of profiled elements of vertical posts, which are made of hollow rectangular profiles, rigidly interconnected by solid rib along transverse axis along whole height of element, while vertical guide in lower portion is provided with guiding conductor.

EFFECT: higher efficiency, broader functional capabilities.

2 cl, 13 dwg

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