EP2740856A2 - Cage d'armature pour escaliers préfabriqués et son dispositif de fabrication - Google Patents

Cage d'armature pour escaliers préfabriqués et son dispositif de fabrication Download PDF

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Publication number
EP2740856A2
EP2740856A2 EP13450054.5A EP13450054A EP2740856A2 EP 2740856 A2 EP2740856 A2 EP 2740856A2 EP 13450054 A EP13450054 A EP 13450054A EP 2740856 A2 EP2740856 A2 EP 2740856A2
Authority
EP
European Patent Office
Prior art keywords
bars
longitudinal bars
longitudinal
reinforcing cage
support bracket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP13450054.5A
Other languages
German (de)
English (en)
Other versions
EP2740856A3 (fr
Inventor
Alfred Redlberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Franz Oberndorfer GmbH and Co KG
Original Assignee
Franz Oberndorfer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Franz Oberndorfer GmbH and Co KG filed Critical Franz Oberndorfer GmbH and Co KG
Publication of EP2740856A2 publication Critical patent/EP2740856A2/fr
Publication of EP2740856A3 publication Critical patent/EP2740856A3/fr
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0627—Three-dimensional reinforcements composed of a prefabricated reinforcing mat combined with reinforcing elements protruding out of the plane of the mat
    • E04C5/0631—Reinforcing mats combined with separate prefabricated reinforcement cages or girders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
    • B21D11/12—Bending specially adapted to produce specific articles, e.g. leaf springs the articles being reinforcements for concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/104—Treads
    • E04F11/116—Treads of stone, concrete or like material or with an upper layer of stone or stone like material, e.g. ceramics, concrete; of glass or with an upper layer of glass
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F2011/0203—Miscellaneous features of stairways not otherwise provided for
    • E04F2011/0205—Stairways characterised by the use of specific materials for the supporting structure of the treads
    • E04F2011/021—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass
    • E04F2011/0212—Stairways characterised by the use of specific materials for the supporting structure of the treads mainly of stone or stone like materials, e.g. concrete; mainly of glass mainly of concrete

Definitions

  • the invention further relates to an apparatus for producing such a reinforcing cage.
  • reinforcing cages for each staircase are made individually from a multiplicity of individually also individually produced reinforcing bars and reinforcing bars, which are tied together or welded together. This production is very time-consuming and thus costly and it also results in unfavorable deviations from the desired dimensions.
  • the aim of the invention is therefore to be able to produce reinforcing baskets using standard reinforcing elements inexpensively and accurately and within a short time.
  • a reinforcing cage of the type mentioned above in that it has an upper part for an upper support bracket, an upper intermediate part and a middle part, that the upper part, the intermediate part and the middle part have longitudinal bars which are interconnected by cross bars and that the upper part, preferably on longitudinal bars, is connected via the upper intermediate part with the central part.
  • the invention can be used either only for the upper or the lower but also for both support brackets.
  • console fall within the scope of the invention, all possible configurations of the upper and lower end of the stairs, as well as. Podiums or the like.
  • standard reinforcement components namely an upper part for an upper support bracket and / or a lower support bracket and a middle part for the running plate and intermediate parts for connecting the middle part to the upper part and / or. or lower part used.
  • the upper and lower parts and intermediate parts can be standardized and then preferably connected in a specially designed device with the most individual, to a certain extent but also standardized middle parts to the reinforcement cage, in particular welded.
  • longitudinal bars of the upper and / or lower intermediate part are arranged parallel to longitudinal bars of the central part and connected thereto.
  • the intermediate parts are in this case separate parts or assemblies or modules which are connected to the middle part and the upper part or the lower part.
  • longitudinal bars of the upper and / or lower intermediate part are the ends of longitudinal bars of the central part.
  • the intermediate parts are formed by the corresponding bent ends of the longitudinal bars, the intermediate parts are in other words integrated into the ends of the longitudinal bars of the central part.
  • a reinforcement cage may have only separate intermediate parts or only integrated intermediate parts at both ends as well as a separate intermediate part at one end and an integrated intermediate part at the other end.
  • the object of the invention is further achieved with a device for producing such a reinforcing cage, which is characterized by a base surface for longitudinal bars of the central part and at least one pivotable relative to the base surface and optionally displaceable holder for rods of the upper part or lower part and upper or lower intermediate part of the reinforcing basket is.
  • the device is designed so that the geometry of the entire reinforcement cage is created by adjusting the bearing surfaces for the standard reinforcing elements.
  • the data for setting the device are preferably generated from the planning tool of stair planning. Furthermore, by default, the stairs can only be made with the reinforcement required for the final installation state. The reinforcement required for the loads during transport and assembly can be used for the safe positioning of the reinforcement cage in the formwork.
  • a first embodiment of a reinforcing basket according to the invention is shown, which consists of four standard elements, namely a top 2, an upper intermediate part 3, a lower part 4, a lower intermediate part 5 and in many cases with respect to its length, width and height individual middle part 1.
  • the middle part 1 has two or more longitudinal bars 6 located next to one another in a first plane and two or more longitudinal bars 7 located next to one another in a second plane lying above the first plane.
  • the longitudinal bars 6 and 7 are connected to each other via lattice girders 8, which are welded to the longitudinal bars 6 and 7 respectively.
  • the number of lattice girders 8 depends on the length of the stairs and the computational load on the stairs for which the reinforcement cage is designed, and in particular also on the Strain during transport and manipulation processes. It also does not have all the longitudinal bars 6, 7 attached to all lattice girders, in particular welded. It is sufficient if all the reinforcement parts are connected to a sufficiently stable basket.
  • the lattice girders 8 consist of first connecting rods 9 and second connecting rods 10, which are welded together by cross bars 11, 12, 13.
  • the first connecting rods 9 and second connecting rods 10 are preferably arranged in pairs A-shaped, wherein the second connecting rods 10 are welded to the tip of the A with a transverse bar 13.
  • the transverse bar 12 of the respective lattice girder 8 is welded to some or all lower longitudinal bars 6, whereas the transverse bar 11 is not connected to the longitudinal bars 4. Therefore, the cross bars 11 can be moved relative to the longitudinal bars 6.
  • upper and lower longitudinal bars 6, 7 can be connected to each other in any other way.
  • the upper longitudinal bars 7 can also be left out completely or replaced by another form of reinforcement.
  • an upper intermediate part 3 is arranged, the two or more adjacent longitudinal bars 15 with a bent
  • Connecting portion 16 and then a U-shaped bent end 17 has.
  • the longitudinal bars 15 and their bent connecting portions 16 are welded together by cross bars 18, 19; so that a largely stable or transportable unit or assembly is formed.
  • the upper intermediate part 3 is welded either directly to its longitudinal bars 15 on the longitudinal bars 6 of the middle part 1 or over one or more transverse bars, for example the transverse bar 18, to the longitudinal bars 6 of the central part 1, when the longitudinal bars 6, 15 are adjacent.
  • the upper part 2 preferably has one of the number of longitudinal bars 6, 15 of the middle part 1 and intermediate part 3 corresponding number of longitudinal bars 20 which are arranged approximately at right angles to the connecting portions 16 and welded thereto.
  • the longitudinal bars 20 of the upper part 2 are also welded to the bent ends 17 of the intermediate part 3.
  • the longitudinal bars 20 of the upper part 2 have a preferably bent at right angles portion 21. Adjacent longitudinal bars 20 of the upper part 2 are in turn connected to each other by means of transverse bars 22, 23, which are welded to the longitudinal bars 20 and their bent portions 21.
  • Fig. 1 is an upper support bracket 24 with a tread surface 25 and the middle part 26 of the stairs with steps 27 with a tread surface 28 to see.
  • the longitudinal bars 20 of the upper part 2 are arranged parallel to a main plane of the support bracket 24, which in turn lies in or parallel to the tread surface 25.
  • the connecting portions 16 of the longitudinal rods 15 and their U-shaped bent ends 17 are arranged at right angles to the longitudinal bars 20 and welded thereto.
  • Fig. 1 On suitable elements of the reinforcement cage, in the example of Fig. 1 on the longitudinal bars 6, the connecting portions 16 and the bent portions 21, spacers 29 are mounted, which the distance of these parts to a not Define the formwork for the stairs.
  • the upper longitudinal bars 7 of the middle part 1 are either as out Fig. 1 visible in the lower portion in the area of the corners 30 directly to the (not shown) staircase formwork or are as already described and shown in the upper portion of the central part 1 also with spacers 14, which preferably consist of non-corrosive material, something of the formwork and thus spaced from the corner 30.
  • a lower intermediate part 5 is arranged, which has two or more adjacent longitudinal bars 31 with a bent connecting portion 32 and a subsequent thereto a U-shaped bent end 33.
  • the longitudinal bars 31 and their bent connecting portions 32 are welded together by cross bars 34, 35, so that here too a largely stable or transportable unit or assembly is formed.
  • the lower intermediate part 5, like the upper intermediate part 3, is either welded directly to its longitudinal bars 31 on the longitudinal bars 6 of the central part 1 or, for example, via the transverse bar 34, to the longitudinal bars 6 of the middle part 1.
  • the lower part 4 like the upper part 2, preferably has a number of longitudinal bars 36 corresponding to the number of longitudinal bars 6, 31 of the middle part 1 or intermediate part 5, which are arranged approximately at right angles to the connecting sections 32 of the intermediate part 5 and welded thereto ,
  • the longitudinal bars 36 of the lower part 4 are also welded to the bent ends 33 of the intermediate part 5. Again, a compound of the longitudinal bars would be possible indirectly via the cross bars.
  • the longitudinal bars 36 of the lower part 4 have a preferably bent at right angles portion 37. Adjacent longitudinal bars 36 of the lower part 4 are in turn connected to each other by means of transverse bars 22, 23, which are welded to the longitudinal bars 36 and their bent portions 37.
  • Fig. 1 is further a lower support bracket 38 with a To see the performance area 39.
  • the longitudinal bars 36 of the lower part 4 are arranged parallel to a main plane of the support bracket 38, which lies in or parallel to the tread surface 39.
  • the connecting portions 32 of the longitudinal bars 31 of the lower intermediate part 5 and their U-shaped bent ends 33 are arranged at right angles to the longitudinal bars 36 of the lower part 4 and welded thereto.
  • the upper and lower support brackets 24, 38 are dimensioned similarly, the upper part 2 and the lower part 4 can be made identical. According to the invention can be provided by a few standardized parts for a large range of support consoles or platforms, a top part 2 and a lower part 4, which are kept in appropriate quantities in stock or can be made quickly due to the known dimensions if necessary.
  • intermediate parts 3, 5 in particular in standardized sizes, it is also possible to position standardized upper parts 2 or lower parts 4 with respect to the central part 1 such that a multiplicity of different heights of support consoles are realized with a suitable concrete cover can.
  • Fig. 6 shows.
  • standardized intermediate parts 3, 5 can be used even if the pitch of the stairs compared to in Fig. 1 shown ideal slope larger (shown in solid lines) or smaller (shown in dotted lines), since the connecting portions 16, 32 are not then attached at an angle of 90 ° to the longitudinal bars 20, 36, but within a certain limits no has adverse effect on the functionality of the reinforcement cage.
  • FIG. 7 an alternative embodiment of the invention is shown in which the upper intermediate part 40 and the lower intermediate part 41 are integrated in the longitudinal bars 42 of the middle part.
  • the ends of the longitudinal bars 42 of the central part accordingly form simultaneously the longitudinal bars of the upper intermediate part 40 and the lower intermediate part 41, wherein the connecting sections 43, 44 as already described in connection with the embodiment of FIG Fig. 1 described are bent and can be connected to an upper part 2 and a lower part 4.
  • the embodiment of Fig. 7 like those of Fig. 1 be executed.
  • the embodiment of Fig. 7 Although in comparison with the embodiment of Fig. 1 is a limitation on the variability in the longitudinal direction of the central part 1, but still offers the desired adaptability in the vertical and horizontal directions on the support brackets 24, 38 and also with respect to the pitch angle as with reference to Fig. 6 described.
  • a further embodiment of a reinforcing cage according to the invention is shown, which can be used in particular for long support brackets or podiums 45, 46 used.
  • the upper part 2 and the lower part 4 are as well as to Fig. 1 described executed.
  • the upper intermediate part 3 and the lower intermediate part 5 are substantially as well as to Fig. 1 described, but with the difference that the longitudinal bars 20, 36 of the intermediate parts 3, 5 are arranged at an angle of 90 ° to their connecting portions 16, 32.
  • the upper intermediate part 3 or its longitudinal bar 20 is in the embodiment of Fig. 8 connected via a connecting part 47 with the longitudinal bar 6 of the middle part 1, preferably welded.
  • the connecting part 47 represents an extension of the longitudinal bar 20 of the intermediate part 3.
  • the connecting part 47 is angled parallel to the longitudinal bars 6 of the middle part and in addition connected to a supplementary part 49, which reinforces the reinforcement of the stairs in the region of the top.
  • the longitudinal bar 6 of the central part is bent in its end region 50 in the direction of the longitudinal bar 36 of the lower intermediate part 5 and welded thereto.
  • the longitudinal bar 36 of the lower intermediate part 5 could be extended towards the longitudinal bar 6 of the central part and then welded to it.
  • a further additional part 51 is arranged in this embodiment, which reinforces the reinforcement of the staircase in this area analogously to the upper additional part 49.
  • the upper part 2 is as to Fig. 1 described and welded to the connecting portions 52 and the bent ends 53 of the intermediate part 40.
  • the lower part 4 of the embodiment of Fig. 10 is fixed without intermediate part on the central part 1 and has longitudinal bars 54 which extend in or parallel to a main plane of a lower support bracket and have a bent portion 55 which is arranged parallel to the respective longitudinal bar 6 of the central part 1 and welded thereto.
  • the longitudinal bars 54 of the lower part 4 also have at the other end a preferably bent portion 56 at a right angle. Adjacent longitudinal bars 54 of the lower part 4 are connected to each other by means of transverse bars 57, 58, which are welded to the longitudinal bars 54 and their bent portions 55, 56, respectively.
  • the longitudinal bars 6 of the central part 1 in the region of the lower support bracket or Lower part 4 of the reinforcing basket on a V-shaped bent connecting portion 58 which is preferably aligned at right angles to the respective longitudinal bar 54 of the lower part 4 and welded thereto.
  • the ends 59 of the longitudinal bars 54 of the lower part 4 are welded to the longitudinal bars 6 of the middle part 1, but could also be a bent portion 55 analogous to Fig. 10 exhibit.
  • the longitudinal bars 54 of the lower part 4 are still connected via welded transverse bars 60 with each other.
  • a device with which the reinforcing baskets according to the invention can be produced with the middle part 1 and the upper part 2 and lower part 4 is, in a preferred embodiment in FIG Fig. 11 shown.
  • This device has a base surface 61 on a base plate or a base frame 62, on which the longitudinal bars 6 of the middle part 1 are placed. Furthermore, the device has a first holder 63, which can be pivoted relative to the base surface, for the upper part 2 of the reinforcing cage and a second holder 64, which can be swiveled and displaced relative to the base surface 61, for the lower part 4 of the reinforcing basket.
  • the holder 63 for the upper part 2 has a first
  • the holder 63 has a third support surface 67 for the bent portions 21 of the longitudinal bars 20 of the upper part 2, which preferably also extends at right angles to the second support surface 66.
  • a carrier 68 for the third support surface 67 is adjustable by means of a preferably motor-driven threaded spindle 69 in the direction of the double arrow 70 in order to adapt the device to different length longitudinal bars 20 for different length support brackets 24.
  • a carrier 71 for the first and second bearing surface 65, 66 may be adjustable in the direction of the double arrow 72 in order to be able to adapt the holder 63 to connection sections 52 or support console heights of different lengths.
  • the holder 64 for the lower part 4 is not only pivotable in the direction of the double arrow 73 but also displaceable in the direction of the double arrow 74 in order to adapt the device to different lengths middle parts 1 can.
  • the holder 64 likewise has a carrier 80 for a first support surface 75 for the longitudinal rods 54 extending in or parallel to the main plane of the support bracket of the lower part and a second support surface 46 preferably arranged at right angles thereto for a bent section 56 of the longitudinal rods 54 of the lower part 4 on.
  • a support 77 for the second support surface 76 is adjustable by means of a preferably motor-driven threaded spindle 78 in the direction of the double arrow 79 to the device at different lengths of longitudinal rods 54 for different lengths To adjust support consoles.
  • the height of the bearing surface 75 of the holder 64 in the direction of the double arrow 81 is adjustable, can also be positioned with this support 64 and lower parts 4 via intermediate parts of variable length in a simple manner.
  • the preparation of the reinforcing baskets according to the invention by means of the device according to the invention can be carried out so that first the brackets 63, 64 manually or automatically controlled in the appropriate positions or angles for the length of the central part 1 and the position and size of the upper part 2 and the lower part 4 and, if available, the separate intermediate parts are set.
  • the longitudinal bars 6 of the middle part 1 and the upper part 2 and the lower part 4 and optionally the separate intermediate parts are inserted into the device.
  • the position of the upper part 2 and the lower part 4 and optionally the intermediate parts automatically results from the brackets 63, 64.
  • the position of the longitudinal bars 6 in the longitudinal direction results in the variants with integrated intermediate parts also by the holder 63 and 64.
  • additional brackets are provided on the support surface.
  • the longitudinal bars 6 and the upper part 2 and the lower part 4 and, where appropriate, the separate intermediate parts are aligned with each other when inserted into the device and brought into abutment. Then the individual bars and sections with very high dimensional accuracy at the described locations can be welded together.
  • the lattice girders 8 are welded with their transverse bars 12 to the longitudinal bars 6.
  • the upper longitudinal bars 7 can now be welded as described with the lattice girders 8. Theoretically, it would also be possible to insert the middle part 1 already as a prefabricated module in the device and then to weld with the prefabricated upper part 2 and lower part 4.
  • a welded connection has been described as a preferred method of connection for the individual reinforcing elements.
  • any other connection such as gluing or tying with wire, may also be used, whereby different methods of connection may also be used simultaneously for a basket.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Steps, Ramps, And Handrails (AREA)
EP13450054.5A 2012-12-06 2013-12-05 Cage d'armature pour escaliers préfabriqués et son dispositif de fabrication Pending EP2740856A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA1278/2012A AT513704B1 (de) 2012-12-06 2012-12-06 Bewehrungskorb für Fertigteiltreppen und Vorrichtung zum Herstellen dieser

Publications (2)

Publication Number Publication Date
EP2740856A2 true EP2740856A2 (fr) 2014-06-11
EP2740856A3 EP2740856A3 (fr) 2017-08-23

Family

ID=49886828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13450054.5A Pending EP2740856A3 (fr) 2012-12-06 2013-12-05 Cage d'armature pour escaliers préfabriqués et son dispositif de fabrication

Country Status (2)

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EP (1) EP2740856A3 (fr)
AT (1) AT513704B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019183947A1 (fr) * 2018-03-30 2019-10-03 深圳市君盈建筑科技有限公司 Procédé de pliage et de mise en forme de maillage de cadre de barre d'acier
CN113279529A (zh) * 2021-06-28 2021-08-20 北京城建集团有限责任公司 基于钢筋桁架楼承板的大跨度免拆阶梯结构及其施工方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1082834A (fr) * 1953-05-29 1955-01-03 Balency & Schuhl Escalier préfabriqué
DE1202460B (de) * 1961-03-30 1965-10-07 Helmut Bruckner Verfahren zum Herstellen von Bewehrungsmatten fuer Treppenplatten aus Stahlbeton
FR1287109A (fr) * 1961-04-17 1962-03-09 Baustahlgewebe Gmbh Dispositif pour le pliage d'armatures pour le béton armé, constituées par un treillis
DE2456776A1 (de) * 1974-11-30 1976-08-12 Ludwig Haeberle Bewehrungskorb fuer treppenstufen u.dgl.
CH687008A5 (de) * 1993-04-26 1996-08-30 Michael R Koch Biegevorrichtung fuer die Laengsdrahtenden von Bewehrungsgittern fuer Betonplatten.
AT403182B (de) * 1995-03-15 1997-11-25 Wuppermann Metalltechnik Gmbh Vorrichtung zur herstellung einer trittschalldämmung
JP2007308975A (ja) * 2006-05-18 2007-11-29 Norimitsu Kusagaki 鉄筋構造体及びその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019183947A1 (fr) * 2018-03-30 2019-10-03 深圳市君盈建筑科技有限公司 Procédé de pliage et de mise en forme de maillage de cadre de barre d'acier
CN113279529A (zh) * 2021-06-28 2021-08-20 北京城建集团有限责任公司 基于钢筋桁架楼承板的大跨度免拆阶梯结构及其施工方法
CN113279529B (zh) * 2021-06-28 2023-09-29 北京城建集团有限责任公司 基于钢筋桁架楼承板的大跨度免拆阶梯结构及其施工方法

Also Published As

Publication number Publication date
AT513704A1 (de) 2014-06-15
AT513704B1 (de) 2014-11-15
EP2740856A3 (fr) 2017-08-23

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