Construction Method and Device of Floor Structure in Elevator's Machine Room in Apartment Building Using Hanging Structural Method

Abstract

The present invention relates to a method for constructing a frame structure to open an elevator early in the construction of a multi-unit dwelling (apartment). The method involves installing steel columns inside the walls of the elevator shaft on the rooftop floor, pouring concrete to form steel piles, suspending and fixing deck plates of the elevator machine room floor to the piles (anchor columns), and then pouring rebar and concrete to form a floor structure. Alternatively, the invention relates to constructing the machine room floor by extending the anchor columns to form steel columns of the machine room walls and steel beams of the roof, and then suspending deck plates of the machine room floor to the steel beams. By completing the floor early and installing the elevator, the invention relates to shortening the overall construction period.

Description

Technology Field

[0001] The present invention relates to a method of constructing a floor frame for an elevator machine room in a multi-unit residential building by installing steel columns in the core walls and suspending formwork (formwork, deck) from the steel columns, thereby ensuring safety and shortening the frame construction period, which in turn shortens the overall project period. Background Technology

[0002] The construction of multi-unit housing proceeds with excavation, completion of the basement, and completion of the above-ground structural framework, followed by finishing and interior work. During the structural and finishing phases, construction materials and personnel must be lifted upwards, so equipment is used for this purpose.

[0003] Lifting equipment includes tower cranes and temporary construction elevators (hoists and lift cars) installed on the exterior walls of the frame, along with some of the elevators being used for construction purposes.

[0004] Tower cranes lift heavy materials such as formwork gang forms, aluminum forms, rebar, and elevator hoists. Temporary construction elevators (hereinafter referred to as hoists) lift materials such as workers, cement, bricks, door frames, doors, furniture, stone, electrical equipment, and plumbing.

[0005] The installation location of the hoist installed on the exterior wall of the frame must be a place where material movement paths are possible in the plan view, and in the building elevation view, a place where there is no wall toward the window so that it can enter the unit (e.g., a veranda). The number of hoists installed per building is 2 to 3.

[0006] Construction work on the exterior wall sections of floors where the hoist stops, material transport passages, etc., cannot be done while the hoist is in operation, so it is carried out after the hoist is removed.

[0007] The hoist installation time is when the frame is completed to about the 5th floor, reaching a height where the hoist can be installed, and the removal time is after the frame is completed, most finishing materials have been lifted, and the construction elevator has been opened. Once the construction elevator is opened, materials can be lifted using the elevator, so the hoist must now be removed for exterior and material transport passage construction.

[0008] If the opening of the elevator is delayed, the removal of the hoist is also delayed, and the finishing work in the section where the hoist is installed is also delayed. Consequently, the finishing work in the hoist section must be started late and carried out urgently, separately from the main finishing work, which results in a decline in quality and has a negative impact on the overall finishing work.

[0009] Therefore, the opening of the construction elevator, the removal of the hoist, and the finishing work on the hoist section are the most important matters during the finishing work period.

[0010] If the elevator opens early, the hoist can be removed early, and finishing work can be carried out smoothly without being pressed for time.

[0011] Therefore, opening the elevators is a crucial task for completing the remaining finishing work and meeting the completion deadline.

[0012] For example, the overall sequence of apartment construction proceeds as follows: site opening (1 month), excavation (6 months), underground frame (4 months), above-ground frame (49 floors, 1 year), and finishing work (1 year).

[0013] When the 49th floor is completed, the 50th floor is the rooftop floor, and an elevator machine room is constructed separately on the core above the rooftop at a height of two floors (rooftop floor and machine room).

[0014] The conventional construction method and sequence of an elevator machine room are as follows.

[0015] Gang forms or aluminum forms are installed inside the elevator shaft (core) as formwork, and a method is used in which work platforms are bolted to walls such as RCS.

[0016] Exterior walls are constructed using gang forms, while interior walls (elevator halls, stairwells) are constructed using aluminum forms on standard floors and conventional forms on the rooftop floor.

[0017] The thickness of the elevator walls is 30 cm (inner walls) and 60 cm (outer walls). The length of the walls is approximately 6 m and the width is about 3 m. Two passenger elevators fit in here.

[0018] Concrete is poured simultaneously at the top floor, which is the last unit of the apartment frame (e.g., walls of the 49th floor and the rooftop floor of the 50th floor). Next, the walls of the rooftop floor (50th floor, floor height 3.8m), which is the lower of the two floors of the elevator machine room, are constructed. Next, the gang form, aluminum form, and working platform (RCS) inside the elevator shaft are dismantled.

[0019] The reason the above formwork is not used to construct the walls of the 51st-floor machine room and is instead dismantled is that once the machine room floor is constructed, it becomes trapped inside the shaft and cannot rise any further.

[0020] Next, the elevator machine room floor is constructed. To install the machine room floor, floor formwork must be installed, and shoring to support the formwork must be installed.

[0021] At this time, the elevator shaft is an empty space like a chimney for about 160m down to the basement floor, and a floor for installing scaffolding must be formed near the top floor.

[0022] Holes are pre-drilled on the left and right sides of the wall, and horizontal members are installed by inserting pipes or similar materials into these holes. After installing flooring materials such as plywood on top, shoring is erected, followed by the construction of the machine room formwork and the formation of the slab. Subsequently, the lower shoring, flooring materials, pipes, etc., are dismantled.

[0023] Therefore, the process of constructing the machine room slab has a high risk of falling because work must be done in the empty space of the elevator shaft.

[0024] Once the floor of the machine room has cured, supports are installed on it, and the elevator machine room walls (floor height 3.4m) and the machine room roof are constructed.

[0025] Once the concrete on the machine room roof has cured, the shoring inside the machine room is removed. This creates space for the machine room, and elevator installation work begins.

[0026] More than 10 holes are drilled in the machine room floor to install piano wire and ropes running from the machine room floor down to the basement.

[0027] The hoisting machine (elevator motor) is installed on the floor of the machine room, and after being lifted from the first floor to the rooftop by a tower crane, it is lowered by moving it diagonally through an opening (window) in the machine room wall. A chain block is suspended from a hook already embedded in the ceiling of the machine room, and the hoisting machine is lifted and placed back in its original position.

[0028] After the construction of the last unit on the 49th floor, it takes 30 to 45 days to complete the above process (from the rooftop walls to the 50th floor, the machine room roof, and the cleanup of construction materials). This is because the elevator machine room, elevator hall, and two floors of the stairwell must be constructed using conventional methods (Euroform, shoring, and slab curing period).

[0029] The tower crane is dismantled once work such as the machine room framing, parapet wall framing, roof waterproofing, solar power equipment installation, dismantling of exterior wall scaffolding (RCS (Rail Climbing System)), dismantling of core internal work scaffolding (RCS), elevator hoist installation, and unloading of formwork and construction materials to the first floor is completed.

[0030] Afterward, it takes approximately 90 days from the start of elevator construction to completion, and the work sequence is as follows. Two formwork plates are installed in the pit (basement floor of the shaft) and the machine room to specify the vertical and horizontal positions between the basement floor and the machine room (height approximately 170m). A formwork plate is a tool used to specify the positions of piano wire (iron wire), guide rails, ropes, etc., for vertical positioning.

[0031] Lower a piano wire through a hole in the machine room floor down to the underground pit and hang a weight at the end to create a vertical line.

[0032] The hoisting rope is lowered from the machine room, a car is constructed in the pit using that rope, and a worker boards it to ascend while installing guide rails, door frames, etc.

[0033] The elevator is operated through wiring and commissioning.

[0034] Then, a portion of the elevator is opened for construction use. The hoist installed on the exterior wall is then dismantled over a period of about 10 days. After the completion of the top floor (49th floor), the hoist section is cleared approximately 5 months later, including 45 days for the machine room, 90 days for elevator installation, and 10 days for hoist dismantling. Afterward, finishing work must be carried out on the 49-floor line of the hoist section.

[0035] Construction is completed 10 months to 1 year after the top floor frame is completed, and all construction is finished about 2 months after completion, with the remaining 2 months spent on fire safety inspections and occupant inspections.

[0036] Therefore, the process proceeds in the following order: completion of the frame up to the 49th floor of the apartment (point 0), completion of the frame of the elevator machine room (1.5 months), opening of the elevator (3 months), dismantling of the hoist (0.3 months), finishing work on the hoist section (5 months), and fire safety inspection and occupant inspection (2 months). Construction is completed approximately 10 months to 1 year after the completion of the frame.

[0037] Since the finishing work period for the hoist section (5 months) is insufficient, the durations for other tasks must be shortened; however, as shortening the periods for all of them is difficult, it is necessary to reduce the completion of the elevator machine room frame (1.5 months).

[0038] The conventional construction methods and required time for the completion of the elevator machine room frame (1.5 months) are examined as follows.

[0039] For the last unit on the 49th floor, the walls and roof of the 49th floor (50th floor floor, floor height 3.0m) are constructed. Next, the walls of the rooftop floor above it are constructed in two stages (taking 10 days, floor height 3.8m), after which the gang form and RCS scaffolding inside the elevator shaft are dismantled (2 days) and lowered to the 1st floor. Next, the floor of the machine room is constructed (5 days) and then cured (7 days).

[0040] Once curing is complete, shoring is installed, and the walls and roof of the machine room are constructed (10 days) and then cured (10 days). Afterward, the shoring and formwork inside the machine room are removed (5 days) to secure the space for the machine room. Adding up the steps, it takes approximately 45 days. Since the machine room cannot use system forms and requires the use of conventional formwork, and shoring cannot be installed on the lower floors, the process takes time. Furthermore, the procedure is complex as it includes the final steps of installing and removing the shoring after curing.

[0041] As mentioned above, the elevator machine room construction falls under the critical path that determines the overall construction period of the project. If the machine room construction period is shortened, the total construction period is shortened; conversely, if the construction period is extended, the overall construction period is extended or finishing work must be carried out rapidly.

[0042] As described above, conventional elevator machine room construction has the following problems, such as a complex construction process and long construction time.

[0043] To construct the machine room floor, a structure is required to support the floor formwork. For this purpose, when supporting shoring on a working platform (RCS) inside the shaft, the platform is bolted to the wall; therefore, it must be able to withstand the load of the shoring, the load of the machine room floor, and loads during construction.

[0044] Otherwise, there is a risk of falling to the basement. After the machine room floor is constructed, the work platform (RCS) must be suspended using a winch or similar equipment and transported to the floor below, which is also a very dangerous task.

[0045] When drilling holes in the shaft walls, forming beams using pipes, laying plywood, and supporting it with shoring, this must be constructed in mid-air within the shaft, posing a risk of falling (workers) or dropping (materials) during detachment or dismantling.

[0046] When installing a deck plate on a wall after installing brackets and L-shaped angles using a scaffolding (RCS), the structure must be bolted to the wall and capable of withstanding the load; if the deck plate is not secured to the wall, there is a risk of it falling off. After the floor is completed, the brackets and angles must be removed when installing the elevator.

[0047] Alternatively, the brackets and angles must be fixed to the wall for 40 years and may rust and fall off after a long time.

[0048] The hoist is lifted by a tower crane and pulled diagonally through the equipment entry opening (1.4m x 1.4m) in the machine room wall, and then the lower steel beam of the hoist and the hoist are installed using a chain block or similar means via a hook embedded in the ceiling slab. Since the hoist must be moved to the center of the machine room and installed manually, there is a safety risk.

[0049] In work where more than 10 holes must be drilled in the machine room floor, there is a risk of concrete cores falling when coring is performed after the floor concrete is poured.

[0050] When constructing the machine room roof using shoring, the construction period is extended because elevator construction must wait until the roof slab is cured and the shoring is removed. In addition, if concrete is poured for the machine room and stairwell together (constructing the entire core in the same way), the work period increases even further.

[0051] The conventional (existing) elevator machine room construction sequence is as follows.

[0052] 1. Construction of top floor wall framing (49th floor walls and 50th floor floors)

[0053] 2. Rooftop Wall Construction (50th Floor Wall) - Pre-installation of Holes for Support Beams (Wall)

[0054] 3. Dismantling of internal wall gang forms (Alpha form) and work platforms (using a tower crane) - Empty space formed

[0055] 4. Installation of support beams and plates (Rooftop floor (50th floor) floor level) - Floor leading to the rooftop

[0056] 5. Installation of shoring on the rooftop floor (50th floor ~ 51st floor (machine room floor))

[0057] 6. Machine room floor (51st floor) concrete (formwork, rebar for machine room floor) - Machine room floor completed

[0059] *7. Concrete curing for the machine room floor (51st floor)

[0060] 8. Installation of shoring inside the machine room (51st floor ~ 52nd floor (machine room floor ~ ceiling))

[0061] Machine room walls and roof - Rebar and formwork work proceeding simultaneously

[0062] 9. Machine room ceiling slab concrete (formwork and rebar for the machine room ceiling) - Machine room completed

[0063] 10. Curing of machine room ceiling slab concrete

[0064] 11. Dismantling of internal scaffolding in the machine room, dismantling of internal and external formwork

[0065] 12. Bringing the elevator hoist into the machine room (bringing it in via an inclined path through a window after lifting with a tower crane; entry is difficult)

[0066] 13. Start of elevator installation (90 days until opening)

[0067] Therefore, the present invention aims to devise a new method to simplify the elevator machine room construction process and shorten the construction period. Prior art literature

[0068] Application No. 10-2011-0048569, Applicant Daesan CSA Co., Ltd., Pit segment structure for super high-rise elevator pit Application No. 10-2002-0021093 (April 18, 2002), Applicant Han Bong-gil, Construction method of a high-rise building structure having a steel-reinforced concrete structure

[0069] . The problem to be solved

[0070] The present invention is intended to simplify, ensure safety, and shorten the construction period of the elevator machine room frame construction method for multi-unit housing. It forms the floor using a column-free method in which steel columns or steel beams are formed on the upper part of the machine room floor, and then floor formwork (deck plates) are suspended from the columns or beams by wires or the like. means of solving the problem

[0071] After installing anchor steel columns on the upper part of the rooftop wall after the top floor (49th floor), pour concrete for the rooftop floor and install at least 4 anchor steel columns (piles) that rise higher than the rooftop frame and the machine room floor.

[0072] Pull out the aluminum formwork, gang formwork, and work platform (RCS) inside the shaft upwards.

[0073] The deck plate is suspended from the above anchor column using wires or the like to secure the machine room floor formwork.

[0074] Alternatively, after installing steel beams on the above anchor columns, deck plates are suspended using wires or the like to secure the machine room floor formwork.

[0075] Alternatively, after additionally extending steel columns to the above anchor columns and installing steel beams for the machine room roof, deck plates are suspended from the steel beams using wires or the like to secure the machine room floor formwork.

[0076] Once the deck plates are fixed to the floor of the machine room, floor reinforcement is laid and concrete is poured to complete the frame of the machine room floor.

[0077] The hoisting machine and lower steel beam are lowered to the machine room floor using a tower crane.

[0078] After lifting the exterior gang forms for the machine room walls, constructing the wall and roof reinforcement, and installing the interior wall formwork, pour the concrete for the machine room walls and roof.

[0079] We will begin the elevator installation work. Effects of the invention

[0080] The construction period for the rooftop to machine room, which previously took about 45 days using conventional methods, is shortened to within a few days. The total construction period of the project is shortened by more than one month (e.g., shortened from 40 months to 39 months).

[0081] From an economic perspective, since multiple hoists can be dismantled early, hoist rental costs are reduced, and finishing work on each floor of the hoist section can be started early, thereby shortening the construction period or ensuring quality.

[0082] The rooftop construction is completed early, and as a result, several expensive rental equipment units, including concrete pouring machines and tower cranes, can be dismantled early.

[0083] The construction period is shortened, reducing the overall financial costs of the apartment project.

[0084] Residents move in early and quickly experience a happy life.

[0085] The on-site working hours of employees from construction companies, structural companies, numerous finishing companies, and electrical installation companies are reduced, leading to a decrease in labor costs and site management expenses.

[0086] Since deck plates are used for the machine room floor, under-cabinet supports are not required. There is no need for the installation or dismantling of flooring materials, supports, or slab formwork inside the rooftop shaft, which saves time and eliminates safety risks.

[0087] Since anchors, brackets, and angles are not installed on the lower wall of the machine room floor, there is no risk of falling due to future dismantling or rust.

[0089] Since deck plates are used for the machine room floor, shoring (supports) are not required in the lower part of the machine room or inside the shaft, thereby eliminating material lifting, installation, and dismantling operations.

[0090] The risk of falling accidents caused by working (support pipes, support plates) in the empty space of the elevator shaft for installing supports in the lower part to form the floor of the machine room is eliminated.

[0091] Since materials and workers do not enter the area beneath the machine room floor, the floor can be constructed safely and quickly.

[0092] Since the deck plate is suspended using steel columns embedded in the wall and strongly fixed, or steel beams connected to the columns, and is supported at multiple points, there is no risk of falling, dropping, or detachment.

[0093] Since the location of the holes in the machine room floor can be accurately determined from the position of the steel columns or beams inside the wall, the hole sleeves can be fixed in the correct position, and a clear plan for floor reinforcement construction can be established.

[0094] A fall prevention net can be installed inside the shaft by fixing it to the anchor steel column using a wire or rope.

[0095] If safety handrails or safety ropes are installed using steel columns, they are secured as safety facilities.

[0096] Workers' safety harnesses (safety belts) can be attached to the steel beams to prevent falls.

[0097] Since shoring (supports) for the machine room floor are not required, the machine room space can be formed without waiting for the concrete on the machine room roof to cure, and the most important elevator hoist can be installed early.

[0098] The risk of safety accidents is reduced as the hoisting motor and lower steel beam can be vertically positioned using a tower crane. The hook installed on the steel beam of the machine room roof can be utilized early, allowing the hoist to be installed in place sooner and thereby accelerating the start of elevator installation.

[0099] Since the sleeve for the machine room floor hole can be accurately installed on the deck plate, the start of elevator installation (formwork, piano wire lowering, etc.) is accelerated.

[0100] If the steel structure of the machine room floor is assembled on the ground and lifted and installed using a tower crane, the machine room steel structure can be completed safely and quickly. Brief explanation of the drawing

[0101] Figure 1 is a core plan view Figure 2 is a plan view of an elevator wall. FIG. 3 is a cross-sectional view of the 49th floor, rooftop floor, and elevator machine room floor. FIG. 4 is an example of a work classification system for a method of suspending a deck from an anchor column according to the present invention. FIGS. 5 and 6 are examples of process tables for a method of suspending a deck from an anchor column according to the present invention. Figure 7 is the overall logic diagram (flowchart) of the process chart in Figure 5. FIGS. 8 to 12 are partial detailed views of the overall logic diagram of FIG. 7. FIG. 13 is an example of a work classification system for a method of installing an intermediate beam on an anchor column and suspending a deck from the intermediate beam according to the present invention. FIGS. 14 and 15 are examples of process tables for a method of suspending a deck from a heavy beam according to the present invention. Figure 16 is the overall logic diagram (flowchart) of the process chart in Figure 14. FIGS. 17 to 21 are partial detailed views of the overall logic diagram of FIG. 16. FIG. 22 is an example of a work classification system for a method of installing a roof beam on an anchor column and suspending a deck from the roof beam according to the present invention. FIGS. 23 and 24 are examples of process tables for a method of suspending a deck from a heavy beam according to the present invention. Figure 25 is the overall logic diagram (flowchart) of the process chart in Figure 23. FIGS. 26 to 30 are partial detailed views of the overall logic diagram of FIG. 25. FIG. 31 is an example of installing anchor columns when pouring a rooftop core wall according to the present invention. Fig. 32 shows the process of removing the internal aluminum formwork after pouring the core wall of the rooftop floor. Fig. 33 shows the process of installing a fall prevention net. Fig. 34 shows the process of suspending a deck from an anchor column. Fig. 35 shows the concrete pouring for the machine room floor. Fig. 36 shows the installation of a hoist. Fig. 37 shows the lifting process of the machine room wall and roof steel structures. FIG. 38 shows the installation of the steel frame structure for the machine room walls and roof. Fig. 39 shows the lifting of the gang form for the exterior wall of the machine room. Fig. 40 shows the concrete pouring for the machine room roof slab. FIGS. 41 to 52 are examples of cross-sectional views of a method of suspending from a rooftop anchor column according to the present invention. FIGS. 53 to 55 are examples of anchor column fixing devices. Fig. 55 shows a wire method FIGS. 56 and 57 show a method of suspending from an intermediate beam. Fig. 58 shows a method of suspending from a roof beam. FIGS. 59 to 64 are examples of plan views of a method of suspending from an anchor column according to the present invention. FIG. 65 is an example of a plan view of a method suspended from an intermediate beam or roof beam. Specific details for implementing the invention

[0102] An embodiment of the present invention will be described below with reference to the attached drawings. In the steel frame structure of an elevator machine room for a multi-unit dwelling according to the present invention, the upper machine room steel frame column is embedded and installed within the wall of the rooftop elevator shaft, which is the floor above the top floor unit, thereby allowing the machine room floor construction to be done first, and a hoisting machine (lifting winch) for operating the elevator to be installed thereon to enable the construction of the elevator structure.

[0103] First, a deck construction method using an anchor column is explained through an example, in which an anchor column is installed inside an elevator wall according to the features of the present invention, and then a machine room floor deck plate is suspended using the anchor column.

[0104] Figure 1 is a floor plan of one of the two cores of a 49-story apartment building. On the left, there is a shaft for two elevators, and in the center, there is a hall for waiting for the elevators. The hall includes a wall and a space for the vertical plumbing shaft. On the right, there are stairs. Below, there are two apartment entrance doors.

[0105] Figure 2 is a plan view of an elevator wall. The length of the wall is approximately 6 m, the width is 3 m, the thickness of the outer wall is 60 cm, and the thickness of the inner wall belonging to the elevator hall is 30 cm.

[0106] Figure 3 is a cross-sectional view of the rooftop floor and the machine room floor. The rooftop floor is 3.8m high and the machine room floor is 3.6m high, following the 49th floor.

[0107] FIG. 4 is a Work Breakdown Structure (WBS) for a deck construction method using an anchor column according to the present invention.

[0108] The tasks for completing the framework of the 50th floor (rooftop) and the last floor (machine room) are classified after the completion of the 49th floor (top) unit. The tasks marked in red are newly devised tasks in this invention. In L1, L stands for Level.

[0109] Figures 5 and 6 are process schedules for a deck construction method using anchor columns. The process schedule was created using MS-Project, a computer program specialized in creating process schedules.

[0110] First, referring to Fig. 5, the first column contains the ID, which is the number of the work, and the name of the work; the third column contains an item regarding the features of the present invention, and the item regarding the new construction method devised in the present invention is indicated by an asterisk. The numbers 1, 2, and 3 at the top of the bar chart area on the right represent the stages of construction and are not dates (number of working days).

[0111] The rooftop floor is ID1 through ID7 of the construction schedule, is the floor following the 49th floor, has a floor and door leading to the rooftop, and serves as a buffer space necessary for operating the elevator in the middle between the 49th floor elevator and the machine room floor.

[0112] Although the floor height of the 49th floor and other units is 2.8m, the rooftop floor is 3.8m high, so the height of the gang form and internal aluminum form corresponds to 2.8m, so the elevator wall concrete must be poured in two stages.

[0113] After pouring 2.5m to 2.8m in the first stage, pour 1.3m to 1.0m in the second stage.

[0114] When pouring the second layer of concrete after pouring the first layer, an anchor column is installed inside the wall according to the features of the present invention.

[0115] The anchor column is embedded in the lower part of the rooftop secondary wall like a pile driven into the ground, and the upper part is exposed in the machine room wall.

[0116] The purpose of installing anchor columns is to connect a wire to the top of an anchor column or column that is strongly fixed by being embedded in the wall, and to connect one end to a deck plate to suspend the deck and pour concrete for the machine room floor.

[0117] Wire is a rope made of several strands of wire twisted in a spiral, used for lifting materials.

[0118] Another function of the anchor column is to hang a wire from the anchor column and install a fall prevention net inside the elevator shaft.

[0119] Another function of the anchor column is to allow the steel frame of the machine room walls and the steel structure of the roof to be connected and installed to the anchor column. The steel structure of the roof is constructed using deck plates, thereby eliminating the need for shoring and shortening the construction period.

[0120] The anchor column is fixed through reinforcing bars inside the wall or a separate fixing device. The anchor column is embedded about 60 cm in the secondary wall of the rooftop floor and may protrude about 50 cm to 100 cm above the machine room wall, and the detailed specifications and structure are based on structural calculations.

[0121] Horizontal materials (steel pipes, square pipes, rebar, etc.) can be used to connect the columns in order to fix the exact position and height of the anchor columns. Bolt holes and grooves are made in the anchor columns so that other members can be connected and used.

[0122] To fix the anchor column at the correct position and height, fixing devices are installed on the gang form outside the shaft wall, the aluminum form inside, and the floor aluminum form of the elevator hall, and the anchor column is fixed by bolts, welding, etc. The fixing devices are removed after the concrete is poured and hardened to fix the anchor column.

[0123] Another method for installing anchor columns is to insert the anchor columns into the concrete after the second concrete pouring of the rooftop wall, and as the concrete gradually hardens over time, the worker can manually adjust and fix the exact position of the anchor columns.

[0124] When the concrete is cured and hardened, the anchor columns are strongly fixed and perform the function of a structural element, and serve the function of suspending the machine room floor deck and supporting the upper steel structure.

[0125] Since the anchor column is embedded within the elevator wall, its size is smaller than the wall, and since the wall thickness is 300mm to 600mm, the column is preferably in the form of an H-shaped steel, I-shaped steel, aluminum bar, or square pipe with a size of 100mm*100mm to 150mm*150mm.

[0126] Anchor columns are fixed by methods such as being fixed to reinforcing bars inside the wall, connecting horizontal members to the top of the outer gang form and inner aluminum form and fixing the anchor columns to the horizontal members, or attaching a flat steel plate and fixing it with anchor bolts on the upper surface of the primary wall that has been leveled with mortar.

[0127] Columns may be installed at the four corners of the wall and in the middle of the wall. Columns may be installed on the entire wall including two elevators or on only one elevator section.

[0128] Anchor columns are installed inside the wall, and since the rooftop floor (3.8m) requires concrete to be poured in two stages, they are embedded inside the wall during the second pour of the wall that rises to the floor of the machine room, and it is desirable for them to rise about 60cm to 1m above the floor of the machine room.

[0129] Once the anchor columns are fixed, the second layer of concrete for the rooftop walls is poured to complete the rooftop walls. Once the concrete is poured, unlike the slab, the internal aluminum formwork can be removed the next day.

[0130] The gang form outside the wall can be used continuously up to the machine room. However, the aluminum form and the RCS work platform inside the wall must be dismantled. This is because once the floor slab of the machine room is constructed, it can no longer be moved upwards and must be dismantled downwards, which makes the work dangerous.

[0131] The construction of the machine room floor is equivalent to covering the lid of a 160m-high elevator shaft, much like covering a chimney; once the lid is closed, the formwork and RCS inside become trapped. It is like having to remove foreign matter from inside a glass bottle before the lid is closed.

[0132] The aluminum formwork inside the wall can be lifted out one panel at a time by human labor, and since the RCS work platform is heavy, a tower crane is used to lower it to the first floor.

[0133] If the RCS work platform is dismantled, the inside of the shaft becomes a sheer drop down to the basement, so fall prevention facilities or safety facilities must be installed. In the past, safety facilities were installed by making holes in the walls and inserting horizontal members.

[0134] In the present invention, a safety net is installed using anchor columns, and a wire or rope is suspended from the anchor columns, a hole is made in the upper part of the anchor columns, or a bracket is installed to secure the wire. The fall prevention net is lowered into the shaft and secured by tying it to six anchor columns. In this way, the net covers the shaft and prevents workers, materials, and decks from falling.

[0135] Through the above process, the rooftop walls were constructed, the internal formwork was dismantled, and safety facilities were installed.

[0136] The following shows an example of constructing a deck play on the floor of a machine room by suspending it using an anchor column according to the features of the present invention.

[0137] The floor construction for the machine room floor is ID 9 through ID 18 of the process table in Fig. 5.

[0138] The deck plate to be placed on the machine room floor is suspended from an anchor column.

[0139] The machine room floor deck plate is fixed to anchor columns with wires, etc., or suspended from machine room intermediate beams or roof beams with wires, etc. That is, the deck plate is suspended from upper vertical or horizontal members, but in this example, it is shown that it is first installed on anchor columns.

[0140] The wire serves the function of connecting the anchor column and the deck, and transfers the load of the deck to the anchor column. The wire is a spiral bundle or rope of steel wire and is a structure that supports the load of the deck.

[0141] Methods for connecting wires to decks include making holes in the corners of a rectangular deck and passing the wire through them; a method where the wire descends through one corner and rises through the next corner hole to support the deck; a method where additional lumber is placed under the deck and the wire is passed through the lumber to allow the lumber to bear the load; and a method where the flat surface of the deck through which the wire passes is reinforced so that the deck can bear the load.

[0142] Methods of connecting the wire and the anchor column include tying and fixing it like a stake, making a hole in the upper part of the anchor column and passing the wire through the hole to fix it, and fixing it to the bracket when a bracket is installed on the anchor column.

[0143] In order for a deck plate to be suspended by wire and withstand the load of rebar, workers, and concrete, a method is used in which holes are made at the four corners of the deck plate, wires are passed under the deck and come out through the opposite holes, and the deck is suspended from anchor columns on the beams. However, since the corner holes may tear or the deck may warp due to the wires, the load can be distributed by supporting the underside of the deck with square pipes (timber) or round pipes and passing the wires through the pipes so that the pipes (timber) bear the load.

[0144] The pipes and wires located under the deck are removed from the elevator car later when the elevator is installed after the slab is poured. This ensures that there are no materials inside the shaft and that no falling debris will occur even after decades.

[0145] Deck plates are installed along the shorter side of the shaft, and about 4 to 6 plates are laid out, with some overlapping each other. It is preferable to use special plates with higher floor plate strength than general deck plates.

[0147] The size of the deck plate is equal to the width of the elevator shaft (3m) or about 1cm to 2cm larger. If it is equal to the shaft width, some of the concrete may sink between the wall and the deck, so the joints must be sealed with a concrete leakage prevention material (steel mesh). If it is about 1cm to 2cm larger, the deck can be placed on top of the wall and secured to the top of the wall with nails, etc. This prevents leakage under the concrete. To achieve this, the concrete on the top of the wall must be finished flat when pouring the concrete.

[0148] To accurately adjust the height and position of the deck plate, a device capable of finely adjusting the length of the wire is required. To do this, a turnbuckle is attached to the wire, and turning the turnbuckle shortens or lengthens the wire, thereby adjusting the wire length.

[0149] Since the connection between the deck plate and the wire must be constructed on the floor of the machine room, the workspace is cramped, and although a fall prevention net is installed, the conditions are poor because the work must be done on the upper part of the shaft. To address this, the anchor column, deck, and wire must be assembled in advance on the rooftop or ground, and a mock-up test must be conducted by pouring actual concrete to check for structural stability.

[0150] Accordingly, structural tests were conducted on the ground in advance, and the length of the wire, the method of connecting the wire to the deck, and the method of connecting the wire to the anchor column were accurately adjusted, so that the installation of the deck could be completed simply by connecting it directly at the machine room floor.

[0151] Once the machine room floor deck is installed, rebar and sleeves are installed on top of it.

[0152] Deck plate reinforcement is installed to avoid the location of the sleeves, and reinforcement to withstand high loads around the sleeves can be pre-installed on the first floor. Floor reinforcement is already installed in the deck plates, and the lower and upper reinforcements are installed within a few hours.

[0153] A sleeve is a material used to create more than 10 holes in the floor for elevator ropes, electrical wires, piano wires, etc. In other words, it forms holes while functioning as a formwork to prevent concrete from entering. Since these holes are used to lower piano wires, hoisting ropes, guide rail reference lines, etc., down to the basement, precision is extremely important.

[0154] By using an anchor column, the reference position can be surveyed, and since it is fixed and easy to identify and measure distances, the sleeve can be installed accurately. Of course, the position of the sleeve can be pre-specified during pre-assembly on the ground.

[0155] When working on the deck, a safety rope must be hung somewhere to prevent the worker from falling, and a safety belt must be attached to the top of the anchor column to protect the worker.

[0156] Next, the concrete for the machine room floor is poured and allowed to cure. Then, the floor is completed. Thus, the machine room floor is completed in a few days by hanging it from anchor columns.

[0157] The wires are cut after concrete pouring, and the fall prevention nets, wires, and timbers under the deck are removed during elevator installation.

[0158] Through the above process, the machine room floor was completed in a few days, and the elevator installation work, including the elevator hoist (motor), began.

[0159] This method is a supportless system that does not require the installation of shoring inside the shaft. Since workers do not enter the shaft, there is no risk of safety accidents. Furthermore, because no construction materials are installed inside the shaft, there is no risk of falling materials or falling due to rust after decades. Therefore, the machine room floor can be constructed quickly and safely.

[0160] An example of constructing a machine room wall and roof using an anchor column according to the features of the present invention is shown.

[0161] The wall construction for the machine room floor is ID 19 to ID 27 in the construction schedule of Fig. 5, and the roof construction is ID 28 to ID 33 in Fig. 6.

[0162] A problem during machine room construction is the conventional method of installing scaffolding inside the machine room for roof installation. Since scaffolding takes a significant amount of time from installation to dismantling and occupies the machine room, it prevents the start of elevator installation work, making it a major cause of extended construction periods.

[0163] The shoring is 3.6m high from the floor of the machine room to the roof, supports the formwork of the roof slab, and transfers underground loads to the floor of the machine room.

[0164] To solve these problems, the present invention devises a method for pouring roof concrete without installing shoring, which involves installing steel beams on the roof and then installing deck plates on top of them. As a non-supporting method, this does not occupy machine room space and allows the interior space to be handed over to the elevator installation team, thereby enabling early elevator installation and shortening the construction period.

[0165] The roof steel beams rest on the wall steel columns, and the steel columns are connected to anchor columns. Therefore, the load from the roof does not go to the machine room floor but is transferred to the walls.

[0166] To this end, the steel columns of the walls are first connected to anchor columns, and then the steel beams of the roof are installed. Once the walls (columns) and roof beams are installed, the deck, which serves as the formwork for the roof, is constructed. After installing the wall and roof reinforcement and pouring concrete, the frame of the machine room is completed. Subsequently, the formwork materials are dismantled and lowered to the ground, at which point the construction is finished and only the elevator installation remains.

[0167] Assembling steel wall columns and beams on the machine room floor requires scaffolding to access the structure from high positions. In this process, caution must be exercised regarding falling materials and worker safety. The same applies to the conventional method of installing shoring.

[0168] As a way to solve safety issues caused by such high-altitude work, the steel structure (columns, beams) of the machine room can be pre-assembled on the ground and lifted by a tower crane to connect to the anchor columns.

[0169] This eliminates the need for workers to climb onto the roof to install beams, allowing for the rapid and safe installation of steel structures.

[0170] On the ground, the anchor column and the steel structure are assembled in advance so that they can be accurately connected.

[0171] The connection between the anchor column and the steel column is made using bolts, welding, or attaching and tightening connecting members.

[0172] The materials for columns and roof beams can be steel frames, aluminum bars, etc.

[0173] Therefore, the steel structure can be installed by first assembling it on the ground and then lifting it, or by installing each member in the machine room floor.

[0174] Since the machine room floor is installed, workers can install steel columns on the machine room floor, and roof beams and decks can be assembled on scaffolding. When installing rebar on the roof deck, workers must climb onto the deck, so a separate access facility is required. This is also the case with conventional methods.

[0175] The hoisting machine, which is the elevator motor, can be lowered vertically using a tower crane after the machine room floor is completed. Conventionally, it was moved diagonally through the entry point after the frame was constructed, making the work difficult and raising safety concerns.

[0176] After the hoisting machine is lifted, the roof beams and roof deck are covered to complete the roof (lid).

[0177] The steel beam at the bottom of the hoisting machine is also lifted by a tower crane.

[0178] Subsequently, the repositioning of the hoist and steel beams is performed by connecting a hook to the steel beam and moving them using a chain block, requiring structural calculations. This allows for the early setting of the hoist, thereby accelerating elevator installation.

[0179] Concrete for the machine room walls and roof is poured simultaneously, and prior to that, rebar, gang form, and aluminum formwork are carried out using conventional and traditional methods.

[0180] The following is a representation of the process table in Figure 5 using the logic diagram function, and it is identical to the process table.

[0181] Figure 7 shows the logic of the overall process chart. Red and green represent functional work steps designed according to the features of the present invention; red represents work related to steel columns and beams, and green represents decks and others. The number at the top of the box is the ID number (work number) of the process chart, and the column below is the name of the work.

[0182] Figure 8 shows the logic of the rooftop floor section.

[0183] Figures 9 and 10 show the floor of the machine room.

[0184] Figures 11 and 12 show the walls and roof of the machine room.

[0185] The following is an example illustrating the construction of a machine room floor using a second method in which a deck is suspended from an intermediate beam connected to the upper part of an anchor column, rather than an anchor column, according to the features of the present invention.

[0186] The anchor columns are partially embedded in the rooftop walls and partially exposed like piles in the machine room walls.

[0187] Brackets, grooves, or holes can be made on the upper part of the anchor columns, and horizontal steel beams can be installed between the anchor columns. The steel beams can be arranged in a horizontal and vertical grid and are installed at a height of about 1m to 1.5m from the floor of the machine room.

[0188] When the intermediate beam is installed, the load is transferred to the anchor column.

[0189] Install by suspending wires from the intermediate beams and hanging the machine room floor deck plates.

[0190] The intermediate beam is installed in the upper part of the anchor column embedded in the short wall, which is 3m wide, of the elevator wall.

[0191] Intermediate beams include aluminum bars, round pipes, square pipes (square tubes), and steel beams (H-shaped steel, I-shaped steel).

[0192] The steel intermediate beams, including I-beams, L-beams, and T-beams, have a height of 10 to 15 cm and a length of about 3 m.

[0193] Methods of connecting the intermediate beam and the anchor column include adding a bracket to the anchor column and placing the intermediate beam on top of it, making a groove in the top of the anchor column and placing the intermediate beam in the groove, and making a circular hole in the top part of the anchor column and inserting a circular pipe into the hole to fix it.

[0194] Installing a cross beam perpendicular to the intermediate beam has the advantage of allowing wires to be suspended vertically at various points on the shaft plane and properly distributing the load of the deck.

[0195] Using an intermediate beam instead of the third method of using wires on the machine room roof makes it easier to install and adjust wires at a height of 1m to 1.5m, and can be structurally more stable as it is fixed to an anchor column.

[0196] Figure 13 is a work classification system for a method of suspending a deck using an intermediate beam. The deck is on the floor, and the intermediate beam is located at the bottom center of the wall and is indicated in yellow to show that they are connected by a method of suspending each other.

[0197] The red color represents the newly devised operations according to the present invention.

[0198] Figures 14 and 15 are process tables for a method of suspending a deck using intermediate beams.

[0200] The process proceeds in the following order: after installing anchor columns (ID 3), pouring the second concrete for the roof (ID 4), installing intermediate beams on top of the anchor columns (ID 20), installing the machine room floor deck plates (ID 10~13), pouring the floor concrete (ID 16), removing the intermediate beams (ID 21), and constructing the wall steel frame (ID 24), roof steel beams (ID 31), and deck (ID 32).

[0201] Therefore, it is characterized by being installed by suspending it from the floor on an intermediate beam.

[0202] The following is a representation of the process table in Fig. 15 using the logic diagram function, and it is identical to the process table.

[0203] Figure 16 is the logic of the overall process chart. Red and green represent functional work steps designed according to the features of the present invention, red represents work related to steel columns and beams, and green represents decks and others.

[0204] Figure 17 shows the rooftop wall section.

[0205] Figures 18 and 19 show the construction of a machine room floor by suspending a deck from an intermediate beam.

[0206] Figures 20 and 21 show the dismantling of the intermediate beam, the walls and roof of the machine room.

[0207] The following is an example showing the construction of a machine room floor using a third method of suspending a deck from a steel beam on the machine room roof connected to the upper part of an anchor column according to the features of the present invention.

[0208] The anchor columns are partially embedded in the rooftop walls and partially exposed like piles in the machine room walls.

[0209] The wall steel columns and roof steel beams are constructed by connecting the anchor columns and the machine room steel structure.

[0210] The load of the roof is transferred to the anchor columns through the wall steel columns.

[0211] The material of the columns and beams is the same as the material described earlier.

[0212] The connection method between the column and the anchor column is bolted, welded, or by attaching a plate and then bolting or welding it.

[0213] Figure 22 is a work classification system for a method of suspending a deck using roof beams. The deck is on the floor and on the roof beam roof, and is indicated in yellow to show that they are connected by a method of suspending each other.

[0214] The red color represents the newly devised operations according to the present invention.

[0215] Figures 23 and 24 are process tables for a method of suspending a deck using roof beams.

[0216] The process proceeds in the following order: installing anchor columns (ID 3), pouring the second concrete for the roof (ID 4), installing the steel columns for the walls (ID 22), installing the steel beams for the machine room roof (ID 29), connecting the machine room floor deck with wires (ID 10~13), pouring the floor concrete (ID 16), and then constructing the frame for the walls and roof deck (ID 30).

[0217] Therefore, it is characterized by being constructed by suspending the machine room floor deck from the roof beams.

[0218] The following is a representation of the process table in Fig. 23 using the logic diagram function, and is identical to the process table.

[0219] Figure 25 shows the logic of the overall process chart. Red and green represent functional work steps designed according to the features of the present invention; red represents work related to steel columns and beams, and green represents decks and others.

[0220] Figure 26 shows the rooftop floor section.

[0221] Figure 27 shows the steel frame structure of the machine room walls and roof.

[0222] Figures 28, 29, and 30 show a deck suspended from a roof beam to form a floor.

[0223] The following is an example of a three-dimensional figure showing the construction of a machine room floor by suspending a deck from an anchor column according to the features of the present invention.

[0224] Figure 31 shows concrete poured after embedding anchor columns in the second stage of the rooftop floor. As a result, the anchor columns are embedded inside the wall to form piles.

[0225] Figure 32 shows the dismantling of the formwork (aluminum form, gang form) and work platform (RCS) inside the shaft and lowering them to the first floor prior to the construction of the machine room floor.

[0226] Figure 33 shows a fall prevention device installed by suspending a wire from an anchor column.

[0227] Figure 34 shows a deck plate installed on the machine room floor with a wire suspended from an anchor column.

[0228] Figure 35 shows a floor formed by pouring concrete after installing reinforcing bars and sleeves on the floor of a machine room.

[0229] Figure 36 shows a hoisting machine lowered vertically to the floor of the machine room using a tower crane.

[0230] Fig. 37 shows the machine room walls and roof steel structure being assembled on the ground and then lifted by a tower crane.

[0231] Fig. 38 shows a steel structure placed on an anchor column and installed using welding, bolts, and connecting materials.

[0232] Fig. 39 shows the external formwork, the gang form, raised.

[0233] Figure 40 shows the completion of the machine room construction by installing a deck plate on the roof of the machine room, which is the upper part of the steel frame structure, and then pouring concrete after reinforcing steel installation to form the roof.

[0234] The following is an example showing, through a cross-sectional view, how a deck is suspended from an anchor column to construct a machine room floor according to the features of the present invention.

[0235] Fig. 41 shows the pouring of the first wall concrete for the rooftop floor.

[0236] Fig. 42 shows the installation of the rooftop floor secondary wall reinforcement, external gang form, internal aluminum form, and elevator hall slab form.

[0237] Fig. 43 shows an installation where an anchor column is fixed inside the secondary wall of the rooftop floor.

[0238] Figure 44 shows anchor column piles formed by pouring concrete for the secondary wall of the rooftop floor.

[0239] Fig. 45 shows the dismantling of the aluminum formwork and work platform (RCS) inside the shaft.

[0240] Fig. 46 shows the installation of a safety rope and a fall prevention net.

[0241] Fig. 47 shows suspending a wire from an anchor column.

[0242] FIGS. 48 and 49 show the process of connecting a deck plate of the machine room floor to an anchor column and then adjusting the length of the line with a turn buckle.

[0243] Fig. 50 shows the installation of the sleeve and the bottom reinforcement bar.

[0244] Fig. 51 shows the construction of the upper reinforcement of the deck.

[0245] Fig. 52 shows the pouring of concrete for the floor of the machine room. With this, the floor of the machine room is completed and the elevator installation can begin.

[0246] The shaft utilizes a column-free construction method, eliminating the need for temporary supports and preventing workers from entering, thus eliminating the risk of falling. Safety ropes are secured to anchor columns to prevent worker falls. The machine room floor can be constructed within 2 to 4 days. Work is performed exclusively from the outside of the shaft, ensuring there is no need for future material removal or risk of rust-induced falling.

[0247] FIG. 53 shows an anchor column being installed using an external gang form and an internal aluminum form, and positioned using an anchor column level. The fixing device may consist of a connecting member, a vertical member, and a horizontal member connected to the gang form or aluminum form. The connecting member is fixed by being inserted in a U-shape onto the top of the external gang form or aluminum form and secured with a fixing pin or bolt. The vertical member is connected to the connecting member by welding or bolting using square pipes or steel plates. The horizontal member is connected to the vertical member via a bracket, bolt, or another connecting member. The anchor column is fixed by being placed on or suspended from the horizontal member and is additionally secured to surrounding reinforcing bars, etc. The position and height of the anchor column are fixed through the strongly fixed aluminum form, the fixing device, and the level. In this state, the anchor column is not fixed for a long period and remains in place until the second wall concrete of the rooftop floor is poured for half a day or the next day. After about 30 minutes have passed since the concrete was poured, the concrete hardens, allowing the position to be checked or finely adjusted. This makes it possible to form a pile at a location that is precisely connected to the upper machine room steel structure.

[0248] Figure 54 shows a method of placing the right fixing device on the elevator hall slab formwork and fixing it.

[0249] FIG. 55 shows examples of methods for connecting an anchor column and a wire, such as a method inserted into a hole, a method connected to a square bracket, and a method connected to a pipe bracket.

[0250] Fig. 56 is a method of suspending a deck by placing an intermediate beam on top of an anchor column and hanging a wire on the intermediate beam, and is a method of suspending a wire on a horizontal beam.

[0251] Fig. 57 shows a method of suspending a wire from a vertical intermediate beam placed perpendicularly on a horizontal beam.

[0252] Fig. 58 shows a method of suspending a deck by hanging a wire from a steel beam on the roof after installing a steel structure for the machine room walls and roof connected to an anchor column.

[0253] The following is an example showing, through a plan view, how a deck is suspended from an anchor column to construct a machine room floor according to the features of the present invention.

[0254] Fig. 59 shows an anchor column installed on the secondary wall of the rooftop floor.

[0255] FIG. 60 shows a horizontal bar installed to fix the anchor column in place when installing the anchor column.

[0256] Fig. 61 shows a machine room floor deck plate suspended by hanging a wire from an anchor column.

[0257] Fig. 62 shows a sleeve installed to make a hole for installing an elevator rope on the floor of the machine room.

[0258] Fig. 63 shows the construction of reinforcing bars.

[0259] Fig. 64 shows the concrete poured for the floor of the machine room.

[0260] Figure 65 shows the installation of connecting an intermediate beam or roof beam to the top of an anchor column, and then suspending a wire and a deck from the beam.

[0261] The embodiments of the present invention described above and illustrated in the drawings should not be interpreted as limiting the technical scope of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and a person skilled in the art may modify or change the technical scope of the present invention in various forms. Accordingly, such modifications and changes will fall within the scope of protection of the present invention insofar as they are obvious to a person skilled in the art. Industrial applicability

[0262] In the construction of a floor for an elevator machine room in a multi-unit building according to the present invention, the deck construction method using anchor columns and a suspended structure can be immediately applied to a construction site currently under construction or a construction site to be started in the future in a short period of time once the structural design is made by an architectural and structural design company and the construction method is determined by a construction company. Explanation of the symbols

[0263] 11: Rooftop wall primary concrete 12: Rooftop wall secondary concrete 13: External gang form 14: Internal aluminum formwork, RCS 15 : Wall reinforcement 16 : Anchor Column 17 : Hole (hole) 18 : Bracket 19: Anchor column fixing device 20: Anchor column level 21 : Fall prevention net 22 : Machine room floor deck plate 23 : Wire 24: Turnbuckle 25 : Each pipe 26 : Machine room floor reinforcement 27 : Bottom sleeve 28: Machine room floor concrete 29 : Middle section vertical 30 : Middle beam horizontal 31 : Machine room wall column 32 : Internal mold 41: Machine room roof beam 42: Machine room roof deck plate 43: Machine room roof reinforcement 44: Machine room roof concrete 51 : Kwon Sang-gi 52 : Steel beam supporting the hoist 53 : Safety rope

Claims

Claim 1 A method for constructing an elevator machine room frame using a pre-assembled steel structure and anchor connections, comprising: a) embedding a plurality of anchors extending vertically into the rooftop elevator shaft wall and pouring concrete for the wall; b) pre-assembling a steel structure for the machine room wall and roof, wherein the steel structure comprises a plurality of vertical steel columns and a plurality of steel beams connecting the steel columns in a horizontal direction, and forming a connecting member at the bottom of the steel columns for connection with the vertical anchors; c) lifting the pre-assembled steel structure with a tower crane and connecting the connecting member formed at the bottom of the steel columns to the anchors embedded in the rooftop wall to firmly fix the steel structure to the top of the rooftop wall; d) directly installing a machine room roof deck plate on the steel beams of the steel structure by welding or bolting without supporting supports; e) installing roof reinforcement on the roof deck plate. and f) a step of pouring concrete onto the roof deck plate to form the roof of the elevator machine room; a method for constructing the frame of an elevator machine room characterized by including:

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