Building site device having a climbing formwork, and lift growing therewith
Patent Information
- Application Number
- EP2023818529
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-01-03
- Filing Date
- 2023-12-13
- Publication Date
- 2025-11-12
AI Technical Summary
Existing construction site devices for high-rise buildings with climbing formwork and elevators are inefficient and complex, requiring multiple hoists and cranes for elevating the lifting platform, which increases operational costs and construction time.
A construction site device with a climbing formwork module that integrates a vertically movable machine platform and a lifting platform, where the lifting platform is raised simultaneously with the climbing formwork module via suspension means, eliminating the need for additional lifting equipment and allowing for efficient vertical extension of the elevator shaft as the building grows.
This solution simplifies the construction process, reduces operational costs, and accelerates the construction of high-rise buildings by enabling the elevator system to grow with the building, allowing for continuous use during the construction phase and efficient adaptation to increasing building heights.
Smart Images

Figure 1.1
Abstract
Description
[0001] Construction site equipment with climbing formwork and adjustable elevator
[0002] The invention relates to a construction site device for an elevator system and a method for erecting such an elevator system for a building under construction, with an elevator shaft that increases in height as the building's height progresses during the construction phase. This elevator system can be used particularly on construction sites for high-rise buildings.
[0003] During construction of the building, the lower floors constructed first may already be sufficiently finished to be habitable or usable for another purpose. For this purpose, the elevator system comprises an elevator car with which the floors already used as residential or commercial space can be reached during the construction phase of the building. The construction phase elevator with this elevator car grows with the building to a certain extent, i.e. the usable lifting height of the construction elevator increases with the increasing height of the building or the elevator shaft. This makes it possible for construction workers and building materials or, if applicable, users of apartments or commercial premises already occupied before the building is completed to be transported in the elevator car during the construction period. US 2016 / 0152442 A1 shows such an elevator system.The elevator system has a machine platform that can be moved along the elevator shaft, from which the elevator car is suspended via support means arranged in the elevator shaft. The machine platform is raised on a rotating basis to increase the usable lifting height of the elevator car in the elevator shaft. To raise the machine platform, a lifting platform that can be moved along the elevator shaft is provided to form a support structure that can be supported on the wall of the elevator shaft. This support structure, arranged above the machine platform, is raised by a first lifting gear mounted in the upper area of the elevator shaft to a height at which the platform supported by this support structure can be raised a certain distance. A second lifting gear, arranged on the lifting platform, is used to raise the machine platform.
[0004] Elevator shafts in buildings can be constructed using climbing formwork. Climbing formwork is a discontinuous formwork system and is used for the construction of tower-like structures. They can be used to create concrete sections for the elevator shaft floor by floor. However, it is also conceivable to create concrete sections for two or more floors. Construction site equipment with climbing formwork modules for the construction of concrete sections for a building containing an elevator shaft and scalable elevator systems is known from WO 2022 / 126906 A1. In one embodiment, the lifting platform is mounted directly on climbing brackets or the hydraulic cylinders of a hydraulic climbing mechanism of the climbing formwork.In a two-stage climbing system, the climbing formwork is pulled in two stages, and the hydraulic cylinders are retracted by retracting piston rods, thereby raising the lifting platform connected to the hydraulic cylinder. The climbing formwork thus permanently supports the lifting platform. In another example, a lifting platform is variably connected to a climbing formwork platform via support elements. To raise the lifting platform to the next higher level, the lifting platform must be moved opposite it using a drive and thus raised.
[0005] It is an object of the present invention to overcome the disadvantages of the known and in particular to provide a construction site device of the type mentioned above which can be operated simply and efficiently.
[0006] According to the invention, these and other objects are achieved by a construction site device having the features of claim 1. According to the invention, these and other objects are achieved by a construction site device having the features of claim 1.
[0007] The construction site device comprises a climbing formwork module for the preferably floor-by-floor production of concrete sections of a building comprising at least one elevator shaft. Furthermore, the construction site device comprises an expandable elevator system with a machine platform with an elevator drive that can be moved vertically within the elevator shaft, and an elevator car suspended from the machine platform via support means. With the climbing formwork module, concrete sections for the elevator shaft can be produced floor by floor; however, it is also conceivable to produce concrete sections for two or more floors. In the elevator shaft, an elevator car and a counterweight can move up and down along a vertical track. An elevator shaft can be a single shaft enclosed by shaft walls with a rectangular floor plan.This elevator system is for a building under construction, with an elevator shaft that becomes higher as the building's height increases during the construction phase. This elevator system also features a movable lifting platform for raising the machine platform. With or via the lifting platform located above the machine platform, which is also vertically movable in the elevator shaft, the machine platform can be easily raised using a lifting device in the elevator shaft. The elevator system can then feature an assembly platform from which the guide rail strands for guiding the elevator car and, if applicable, the counterweight can be extended upwards during a rail assembly phase.The fact that the lifting platform is firmly connected to the climbing formwork module via support means at least during one climbing step of the climbing formwork module, during which step the climbing formwork module is moved to the next higher vertical level after completion of a concreting section, so that the lifting platform can be lifted together with the climbing formwork module during the climbing step, results in a number of advantages. For example, a climbing process of the climbing formwork module can also be used to raise the lifting platform, which is very efficient and can accelerate construction progress. This arrangement also has energy advantages. In this case, support means are understood to mean elongated means such as ropes, belts and chains, which can bear high loads in the direction of extension but are bendable or flexible transversely to the direction of extension.
[0008] The clamping formwork module can be designed as a self-clamping clamping formwork. The self-clamping clamping formwork can be equipped with integrated clamping drives. A linear drive, particularly a hydraulic or pneumatic cylinder, spindle drive, rack and pinion drive, and / or chain drive, can be used for the clamping drive.
[0009] The lifting platform can be attached directly or indirectly to a lower work platform of the climbing formwork module via the support gear. This means that when the trailing lower work platform is raised using the climbing drive, the lifting platform is automatically raised and climbs along with it without the need for its own lifting gear. The work platform is also known as a working platform.
[0010] For the aforementioned indirect case, the following embodiment may arise. The climbing formwork module may have a preferably non-walkable support platform located below the lower work platform, with the lifting platform suspended from the support platform. The separation into a work platform and a support platform offers advantages with regard to the handling of the construction site equipment. For example, an eyelet for creating a suspension point for the support element(s) may be arranged on the underside of the support platform.
[0011] The climbing formwork module can have a lower work platform and at least one second work platform located above it, with the lifting platform being attached to the second work platform and the lifting platform being formed by the lower work platform. The climbing formwork module thus comprises at least two work platforms arranged at different heights, with the lower one forming the lifting platform.
[0012] The climbing formwork module can also comprise three work platforms arranged at different heights. The climbing formwork module can have a lower or trailing work platform, a middle work platform above it, and an upper or leading work platform further above it. The lifting platform is attached to the upper work platform and the lifting platform is formed by the lower work platform.
[0013] The construction site equipment can preferably comprise a lowering device integrated into the climbing formwork module. However, it is also conceivable to assign the lowering device to the lifting platform. During a climbing step of the climbing formwork module, during which step the climbing formwork module is moved to the next higher vertical level after completion of a concreting section, the lifting platform is raised together with the climbing formwork module, as the lifting platform is firmly connected to the climbing formwork module. The lifting platform thus becomes a raised or raised lifting platform. With the help of the lowering device, the raised lifting platform can be moved downwards after completion of the climbing step and thus lowered onto temporary or stationary fixed points (e.g. pocket-like recesses in the shaft wall, the floor of the building, consoles attached to the shaft wall or possibly even molded onto it) in or on the elevator shaft.The lifting platform is temporarily supported at these fixed points during the construction phase. The machine platform can also be supported at these fixed points. The lowering device can also be used to adjust the vertical position of the lifting platform. The lowering device can therefore also be used to perform upward movements of the lifting platform if necessary.
[0014] A suspension device, e.g., a drivable continuous winch, can be used as the lowering device. For example, the work platform or the support platform can have a suspension device, e.g., a drivable continuous winch, as the lowering device. If the suspension devices are ropes, the lowering device can be a continuous rope winch. A so-called "Tirak," for example, can be used as the continuous rope winch. Such continuous rope winches have the advantage of being very simple and robust in design and less prone to failure. This minimizes both manufacturing and maintenance costs.
[0015] The construction site device can have at least one chain as a support element for connecting the climbing formwork module to the lifting platform. In other words, the lifting platform can be suspended from the work platform or the support platform via chains to form the support element. Preferably, the lifting platform is connected to the climbing formwork module via four chains, preferably attached to corner regions of the lifting platform. The construction site device can further have rope-based safety means for emergency securing of the lifting platform in the event of a failure of the support elements. A failure affects, for example, at least one of the chains.
[0016] For example, the connection between the climbing formwork module and the lifting platform can comprise at least one chain as the load-bearing element and a steel cable as the securing element. The load-bearing element and securing element essentially follow the same path, with the securing element normally being slightly loose and only being used in an emergency and subjected to tensile stress.
[0017] Further advantages can arise if the lifting platform has two parallel horizontal beams, each of which is telescopically designed to extend the beam length and adapt to different shaft dimensions. Alternatively or additionally, movable support elements, for example pivotally mounted on the beam, can be arranged at one and preferably both ends of the respective horizontal beam. These support elements can be used to support the respective horizontal beam and thus the lifting platform as a whole at fixed points in or on the elevator shaft.
[0018] The connection point(s) for the load-bearing device(s) can be integrated into the horizontal beams of the lifting platform. Each horizontal beam can have two connection points formed by eyelets.
[0019] The lifting platform can have a flat roof structure to form a protective roof. The flat roof structure can have a roof panel that provides a protective roof. For a larger application area, it may be advantageous for the lifting platform to have a horizontal roof structure to form a protective roof, with the roof structure being composed of a plurality of planks arranged side by side. This eliminates the need for a separate protective roof.
[0020] Finally, a further aspect of the invention relates to a method for erecting an elevator system for a building under construction with an elevator shaft that becomes higher as the building height increases during the construction phase of the building, wherein the elevator shaft is produced by means of a climbing formwork module, preferably floor by floor in concreting sections, wherein between individual concreting sections the climbing formwork module moves upwards in climbing steps, and wherein the elevator system comprises a machine platform that is vertically movable in the elevator shaft and a lifting platform that is vertically movable in the elevator shaft for lifting the machine platform.The usable lifting height of the elevator system can be adapted to the increasing height of the building by performing at least one lifting operation. During this lifting operation, the machine platform is raised by an elevator drive and an elevator car suspended from the machine platform via support means is raised in the elevator shaft using a lifting device. This method is characterized by the fact that when the climbing formwork module climbs, the lifting platform is raised simultaneously because it is firmly connected to the climbing formwork module via support means. This creates a highly efficient, fast, and easy-to-use method for erecting a scalable elevator system in combination with the climbing formwork construction method.
[0021] After the climbing step has been completed, the raised lifting platform can be moved downwards using a lowering device and placed onto fixed points on the shaft side. The lowering process does not necessarily have to take place immediately after the climbing step carried out by or with the use of the climbing formwork module. If the climbing formwork module has hydraulic means, for example hydraulic cylinders, for climbing up or lifting, it may happen that a second lifting step follows the hydraulic lifting, in which the lifting platform is moved upwards while the climbing formwork module is temporarily stationary, or more precisely, while the working platform to which the lifting platform is attached is temporarily stationary. This relative movement can be carried out by means of a chain hoist or a winch, in particular by means of the through-feed winch mentioned above. The lifting can therefore take place in two stages, with the lifting platform being raised primarily or temporarily.The lifting platform is raised over a main vertical path, for example, hydraulically using the climbing formwork module (1st stage), and the lifting platform is raised secondarily or over a comparatively short vertical path by influencing the support means, for example, by rolling up or otherwise shortening the support means (2nd stage). The lowering device can be used for this purpose, i.e., the lowering device can also form a lifting device for the secondary lifting of the lifting platform.
[0022] Further advantages and individual features are evident from the following description of exemplary embodiments and the drawings. They show:
[0023] Fig. 1 is a schematic representation of a construction site device with a climbing formwork module and a growing elevator system,
[0024] Fig. 2 is a side view of a construction site device with a climbing formwork module and a lifting platform of the elevator system, Fig. 3 is the construction site device of Fig. 2 after a climbing step,
[0025] Fig. 4 is a perspective view of a lifting platform for the elevator system,
[0026] Fig. 5 is an enlarged view of a horizontal beam of the lifting platform from Fig. 4,
[0027] Fig. 6a, 6b the horizontal beam in two different positions, and
[0028] Fig. 7 is a side view of a lifting platform temporarily fixed in an elevator shaft of the elevator system.
[0029] Fig. 1 schematically shows a construction site device 1, designated 1, with a concrete formwork module 2 and a modular elevator system 3. The concrete formwork module 2 is used for the floor-by-floor production of concrete sections of a building comprising an elevator shaft 4. In this case, only a section of the building, including the elevator shaft 4, is shown. The elevator shaft 4 represents the actual housing core, which typically comprises one or more such elevator shafts. A special feature of elevator shafts is their vertical extension, which in some elevator shafts can extend practically across the entire building height.
[0030] The clamping formwork module 2 is designed as a self-clamping formwork. In this crane-independent variant of a clamping formwork, a clamping mechanism lifts the units to the next floor. The clamping mechanism of the clamping formwork module can comprise linear drives, in particular hydraulic or pneumatic cylinders, spindle drives, rack and pinion drives, or chain drives, or a combination of different drives. In the present embodiment, the clamping processes are carried out hydraulically. Corresponding hydraulic cylinders are designated 30.
[0031] The elevator system 3 for the building under construction thus comprises an elevator shaft 4, which becomes higher as the building's height increases during the construction phase. An elevator car 5 is installed in the elevator shaft 4. During vertical travel, the elevator car 5 is guided along at least one guide rail strand. The aforementioned elevator or elevator system 3 generally comprises, in addition to the elevator car 5, a counterweight (not shown here). The elevator car 5 and counterweight are connected to one another via ropes or belts 16 and can thus be moved in opposite directions to one another. An elevator drive 17, which can, for example, have a traction sheave driven by a motor, is used to move the elevator car 5 (and the counterweight). For optimal linear guidance of the elevator car and the counterweight, several guide rail strands are necessary, with each guide rail strand consisting of guide rails arranged in a row.The elevator system 3 has an arrangement above the elevator car 5 for equipping the upwardly extending elevator shaft 4 with guide rails 35 for the guide rail line. This arrangement comprises a lifting platform 10, a machine platform 6, and an assembly platform 7 arranged between these two platforms 6, 10. The assembly platform 7 is the platform from which the guide rail line is extended upwards. The assembly platform 7 serves as a working platform for assembly personnel. Furthermore, the assembly platform 7 - in addition to the guide rails - can also be used as a means of transport for other elevator components to be assembled. The assembly platform 7 is suspended from the lifting platform 10 via the cable-based lifting device and can be moved up and down in the area between the platforms 6 and 10.
[0032] In the present embodiment, elevator shaft 4 is designed for an elevator with a car and counterweight. However, elevator shaft 4 can also be designed for multiple elevators. Furthermore, elevator shaft 4 could also be designed for a self-propelled construction-phase elevator car.
[0033] Elevator cabin 5 enables the transport of people and goods to and from the lower floors during the building's construction phase. In particular, the elevator cabin can be used to transport construction workers and building materials. However, it can also transport users of apartments or commercial premises occupied before the building's completion between at least the floors assigned to these rooms, in compliance with regulations.
[0034] The climbing formwork module 2 comprises a lower working platform 14, which forms a working platform. Reference numeral 13 denotes another working platform of the climbing formwork module 2. A support formwork 34, into which fresh concrete is poured, is also visible.
[0035] Various work on the climbing formwork can be performed from work platforms 13 and 14. People are depicted on work platforms 13 and 14. Work platforms 13 and 14 are designed for access. For example, climbing consoles can be operated from the work platforms. The removal of cones from the wall can also be performed from here.
[0036] The lifting platform marked 10 is located in an upper area of the currently existing
[0037] The lifting platform 10 is temporarily fixed in the elevator shaft 4. The lifting platform 10 is designed as a supporting structure. Among other things, the lifting platform 10 serves to support the lifting device with which the assembly platform 7 can be moved up and down. The lifting platform 10 can further comprise means for raising the machine platform 6, which is provided with a roof 38. However, the lifting platform 10 also has the task of protecting people and equipment in the elevator shaft 4—especially in the aforementioned assembly platform 7—from objects that may fall during construction work on the building.
[0038] The lifting platform 10 can be raised to the next higher level in the advantageous manner described below and without the use of a crane. After reaching the next higher level, the lifting platform 10 can be temporarily secured again in the elevator shaft 4. The machine platform 6 can then be raised to the next higher level. For this purpose, the lifting platform 10 has lifting means, for example, a chain hoist. The chain hoist is designed so that the machine platform 6, preferably together with the attached elevator car 5, can be raised for a lifting operation.
[0039] The lifting platform 10 has a horizontal flat roof structure 26 for covering the elevator shaft 4 and forming a protective roof. This protective roof 26 serves to prevent concrete and objects from entering the shaft space below the platform 10 (see Fig. 4). Advantageously, a sealing arrangement designed as a circumferential seal can be attached to the edge of the platform 10.
[0040] The lifting platform 10 is firmly connected to the climbing formwork module 2 via support means 20 in the form of ropes, belts, or chains, so that the lifting platform 10 can be lifted together with the climbing formwork module 2 during a climbing step of the climbing formwork module 2. The hydraulic cylinders 30 are required to perform the climbing step. Fig. 1 shows a position of the climbing formwork module 2 in which the lower working platform 14 has previously been hydraulically lifted. In order to bring the lower working platform 14 and thus also the lifting platform 10 to the next higher level, the working platform 13 would first have to be moved or climbed upwards from the position shown in Fig. 1. The lower working platform 14 could then be lifted together with the lifting platform 10 using the hydraulic cylinders 30.
[0041] A lowering device (not shown here) can be provided, with the aid of which the raised lifting platform 10 can be lowered onto fixed points in the elevator shaft 4. Such fixed points can be, for example, pocket-like recesses in the shaft wall and / or the floor. If, for example, the support means 20 are designed as support cables, the aforementioned lowering device can be a drivable cable winch, which can also perform adjustment tasks.
[0042] Figures 2 and 3 relate to a further embodiment of a construction site device 1. The climbing formwork module 2 for the floor-by-floor production of concreting sections 9 of a building comprising an elevator shaft 4 comprises three working platforms 12, 13, 14. The so-called support grid is designated by 39. The climbing formwork module 2 has hydraulic cylinders 30, by means of which the climbing formwork module 2 can move upwards in a worm-like or caterpillar-like manner in a vertical direction. During a climbing step, the trailing lower working platform 14 is moved hydraulically upwards. During this climbing step, since the support means 20 is firmly connected to the climbing formwork module 2 during this climbing step, the lifting platform 10 is also simultaneously moved upwards by the same distance.The climbing formwork module 2 could also have a support platform (not shown) arranged below the lower working platform 14, to which the lifting platform 10 is attached. In the present case, the lifting platform 10 is formed by the lower working platform 14. The lifting platform 10 and the lower working platform 14 can thus obviously be considered equivalent here.
[0043] In Fig. 2, the lifting platform 10 is in a position in which it is positioned just above the floor 37. For the safe operation of the elevator system 3, the lifting platform 10 is lowered to the level of the floor 37 and secured thereto. In this way, the assembly and machine platforms (not shown here) can be safely moved into the desired positions. The step of lowering the lifting platform 10 is indicated by the arrow s. For lowering, for example, a cable winch 11 can be used. On each new floor, the height of the lifting platform 10 can be adjusted, for example, using two cable winches 11, in order to prevent any force from the lifting platform 10 from being transferred to the climbing formwork module 2 above.
[0044] After a hydraulic climbing operation, in which the lifting platform 10 has been raised to the next higher level, which corresponds approximately to one floor, by means of the hydraulic cylinders 30, the situation shown in Fig. 3 can arise. The lifting platform 10 is in a position in which it is positioned slightly below the floor 37. For secure fixation in the shaft, the lifting platform 10 can be moved upwards in the direction of arrow h using the cable winches 11 and moved in the s direction for setting down.
[0045] Structural details for the design of a lifting platform 10 are shown in Figures 4, 5, and 6a / b. The lifting platform 10 has two parallel horizontal beams 21, each of which is designed to be telescopic. Support elements 24 are pivotally mounted on the beam at both ends of each horizontal beam 21. These support elements can be used to support the horizontal beams 21 and thus the lifting platform 10 at fixed points in or on the elevator shaft. Each horizontal beam 21 has two connection points 25 formed by eyelets for the support means (not shown here).
[0046] The support means for connecting the climbing formwork module to the lifting platform 10 can be designed as chains. Thus, the lifting platform 10 is connected to the climbing formwork module via four chains attached to the corners of the lifting platform. The construction site device can further comprise rope-based safety devices for emergency securing of the lifting platform 10 in the event of chain failure. For a redundant safety function, steel cables, for example, are advantageous as safety devices.
[0047] The lifting platform 10 has a horizontal roof structure 26 for forming a protective roof, wherein the roof structure is obviously composed of planks.
[0048] Fig. 7 shows a possible structural design of a lifting platform 10 that can be used for construction site equipment in elevator systems similar to that shown in Fig. 1. The lifting platform 10 has, for example, pivotable support elements 24 that are inserted into recesses 36 in the shaft walls to secure the lifting platform 10. On the opposite side, the lifting platform 10 is also fixed to the floor 37 via similarly designed support elements. Also visible is the motorized lifting device 18 with the chain hoist for lifting the machine platform. The chain of the chain hoist is stored in a chain storage unit. With the chain hoist, the movable machine platform and the elevator car can be moved from a lower temporary deployment position to the next upper deployment position.20 denotes chain hoists as support means, via which the lifting platform 10 is connected to the climbing formwork module and can be moved up and down for adjustment if necessary.
Claims
Construction site equipment comprehensive - a concrete formwork module (2) for producing concreting sections (9) of a building comprising at least one elevator shaft (4), - a growing elevator system (3) with a machine platform (6) which is vertically movable in the elevator shaft (4) and has an elevator drive, an elevator car (5) suspended from the machine platform (6) via ropes or belts (16), and a lifting platform (10) for lifting the machine platform (6), characterized in that the lifting platform (10) is firmly connected to the climbing formwork module (2) via support means (20) at least during a climbing step, such that the lifting platform (10) can be lifted together with the climbing formwork module (2) during the climbing step.
2. Construction site device according to claim 1, characterized in that the climbing formwork module (2) is designed as a self-clinging climbing formwork, and that the lifting platform (10) is suspended via the support means (20) on a working platform (14) of the climbing formwork module (2).
3. Construction site device according to claim 2, characterized in that the climbing formwork module (2) has a lower working platform (14) and at least one working platform (12) located above it, wherein the lifting platform (10) is suspended from the working platform (12) and the lifting platform (10) is formed by the lower working platform (14).
4. Construction site device according to claim 3, characterized in that the climbing formwork module (2) has a lower working platform (14), above it a middle working platform (13) and an upper working platform (14), wherein the lifting platform (10) is suspended from the upper working platform (12) and the lifting platform (10) is formed by the lower working platform (14).
5. Construction site device according to one of claims 1 to 4, characterized in that a setting down device (11) is provided, with the aid of which the raised lifting platform (10) can be set down on fixed points in or on the elevator shaft (4).
6. Construction site device according to claim 5, characterized in that the setting-down device is or comprises a pulling device, in particular a continuous winch (11).
7. Construction site device according to one of claims 1 to 6, characterized in that it has at least one chain as a support means (20) for the connection between the climbing formwork module (2) and the lifting platform (10).
8. Construction site device according to one of claims 1 to 7, characterized in that the lifting platform (10) is connected to the climbing formwork module (2) via four support means (20) and in particular chains attached to corner regions of the lifting platform.
9. Construction site device according to one of claims 1 to 8, characterized in that it further comprises rope-based securing means for securing the lifting platform (10) in the event of failure of the support means (20).
10. Construction site device according to one of claims 1 to 9, characterized in that the lifting platform (10) has two parallel horizontal beams (21), wherein the horizontal beams (21) are each designed telescopically and / or wherein support elements (24) are arranged on one and preferably on both beam ends of the respective horizontal beam (21) and are mounted movable, for example pivotably on the beam, via which support elements horizontal beams (21) and thus the lifting platform can be supported at fixed points in or on the elevator shaft.
11. Construction site device according to claim 10, characterized in that connection points for the support means (20) are integrated in the horizontal beams (21) of the lifting platform (10), each horizontal beam (21) having two connection points (25) formed by eyelets.
12. Construction site device according to one of claims 1 to 11, characterized in that the lifting platform (10) has a horizontal roof structure (26) for forming a protective roof, wherein the roof structure is composed of planks.
13. A method for erecting an elevator system (3) for a building (10) under construction, having an elevator shaft (4) which becomes higher as the building height increases during the construction phase of the building, wherein the elevator shaft (4) is produced by means of a climbing formwork module (2), and wherein the elevator system (3) comprises a machine platform (6) which is vertically movable in the elevator shaft (4) and a lifting platform (10) which is vertically movable in the elevator shaft (4) for lifting the machine platform (6), characterized in that when the climbing formwork module (2) climbs, the lifting platform (10) is raised simultaneously because it is firmly connected to the climbing formwork module (2) via support means (20).
14. Method according to claim 13, characterized in that after completion of the During the climbing step, the raised lifting platform (10) is moved downwards by means of a lowering device (11) and lowered onto fixed points on the shaft side.