KR102500200B1 - Construction method of Apartment building to provide Single projecting terrace per Unit household, and Unit household structure in the building formed thereby - Google Patents

Abstract

The present invention relates to a method of constructing an apartment house formed by stacking a plurality of floors of at least five or more floors so that at least one unit household is formed on each floor.
To this end, at least one wall cantilever 100 is formed in each unit household, and the wall cantilever 100 is stacked at intervals toward the first direction or the second direction, and the wall cantilever 100 facing the first direction In the unit household located on the upper floor, wall cantilevers 100 are formed to face a second direction having an angle of 90 degrees or more with the first direction, and a plurality of wall cantilevers 100 facing the first direction have a predetermined length (β). ) A pair of inner load-bearing walls 200a having a predetermined length β are continuously formed throughout the entire floor, and a pair of inner load-bearing walls 200a having a predetermined length β are also formed on the plurality of wall cantilevers 100 facing the second direction. The inner load-bearing walls 200a are continuously formed over the entire floor to provide structural stability, and the wall cantilever 100 formed in each unit household extends outward from the inner load-bearing wall 200a and protrudes by an extension length α. Thus, a pair of external load-bearing walls 200b having a predetermined length (α) are formed, and three sides are exposed to the outside between the vertically adjacent wall cantilevers 100 of each unit household, and each unit household has a single single An empty space 104 is provided to provide a protruding terrace 110, and a bedroom 130 is provided on the wall cantilever 100 located in the first or second direction of the unit household, and a second corresponding thereto. The kitchen 120 is provided between the inner load-bearing walls 200a in the direction or the first direction, the terrace 110 is provided outside the kitchen 120, and the extension between the bedroom 130 and the kitchen 120 is provided. The living room 140 is provided in the slab space, and the bedroom 130, the kitchen 120, and the terrace 110 are arranged so that the bedroom 130, the kitchen 120, and the terrace 110 intersect with each other, and the inner side formed in the first and second directions. The bearing wall 200a is characterized in that the shaft portion 400 surrounded by the wall is continuously formed over the entire floor and penetrates the bathroom T or the kitchen 120 in the bedroom 130, respectively.

Description

Construction method of Apartment building to provide Single projecting terrace per Unit household, and Unit household structure in the building formed thereby}

The present invention relates to the formation of a single protruding terrace in an apartment house, and more particularly, to a method for constructing an apartment house for providing a single protruding terrace for each unit household and a unit household structure in a building formed through the method.

In general, among various types of buildings, people use for residential purposes are detached houses where a single household can live, and multi-family buildings such as row houses, villas, and apartments where several generations can live together, that is, multi-family houses. are distinguishing

In the case of a detached house, it has the advantage of being able to freely decorate a private garden or terrace while ensuring sufficient privacy, but due to the lack of land for housing and various advantages that can be enjoyed by clustering several households together, in Korea, apartment houses such as apartments Many of these have been built and used.

In the case of such a multi-unit dwelling type building, it is built in the form of a complex in which one or more individual buildings made up of multiple floors have the same planar structure, so individual spaces such as gardens or terraces do not exist in each unit household. It is a structure in which spaces that can be used for common use such as parks or playgrounds are formed within the complex.

In addition, as the apartment building type emphasizes the convenience of living, all floors have the same structure, and such an apartment building structure has limitations in directing various forms of space due to the standardized planar composition. In addition, the conventional apartment house structure has a simple structure of a rectangular parallelepiped, so the elevation is not only uniform, but also does not have an open external space where trees and greenery can be created within the residential space for each household. This is pointed out as the main culprit of making the urban aesthetic dry and missing the charm of the city in the reality of Korea, where the proportion of apartments is very high.

In addition, the balcony, which is an intermediate space in contact with the outside, originally started from the concept of the exterior space of the apartment house, but in reality, it is understood and incorporated as an extension of the interior space, the living room or bedroom, and is becoming an interior space for the living room or storage. In particular, the medium in contact with the outside within the unit household of an apartment house is structured to be possible only through windows, and the yard, etc., which organically connects the interior space and the exterior space in the house, has disappeared, failing to function sufficiently as a residential space.

Therefore, focusing on the need for a dedicated yard for each dwelling unit of an apartment house equipped with various functional needs and needs, safety and convenience, etc., it was intended to develop a unit household structure for an apartment house that satisfies these requirements.

Prior art Registered Utility Model No. 20-0215019 (name of the design; terrace installation type apartment house) deviated from the existing horizontal balcony concept and installed a longitudinal open terrace between the living rooms to provide views (openness), sunlight, lighting, The ventilation problem has been improved. However, in this case, since the terrace is a closed space with a height of one floor intruding into the residential space of a single household, the intended effect cannot be sufficiently exerted.

As an improvement against this, prior art Patent Registration No. 10-1314742 (name of invention: apartment structure with terrace) has terraces provided in each unit household and exposed to the outside, while the terraces of the upper and lower floors do not overlap, and the two unit floors It was made to have a height corresponding to the floor height of By the way, in order to have an individual and non-overlapping terrace, the apartment structure is characterized in that the terrace of the upper floor is located on the upper part of the living room and the void outside the outer wall of the upper floor is located on the upper part of the terrace. " was suggested. In the case of this invention, in order to realize this, it is designed so that a terrace of this concept can be installed by specially constructing four pillars on the living room side in addition to the general structure of the apartment house. In the case of the prior invention, it is applicable only to the case of a tower-type apartment house in which the front and sides are open, and the location of the living room is inevitably placed at the corner where the front and side meet, so the design of the plan is very limited, and the pillars supporting the terrace are separately used. Since it has to be constructed, the workability is significantly reduced and the construction cost is increased.

On the other hand, a technique for forming a terrace using the roof slab of the lower floor has been proposed, but in the case of a roof slab extending horizontally, there is a limit to the length that can be extended, and in order to form a terrace with a wider area, it is registered As in Patent No. 10-1314742, there is a problem in that a pillar must be installed on the roof slab.

The present invention was created to solve the above problems, and the unit household of an apartment house is generally composed of only the interior space, and the space composition of the unit household is a new space type joint composed of an interior space and an exterior space. Its purpose is to provide housing.

Another object of the present invention is to provide a method of constructing an apartment house that can change the shape and elevation of an existing uniform apartment in various ways by planning a homogeneous terrace for each individual unit household of the apartment house.

Another object of the present invention is to plan a column-less terrace structure through a wall-type cantilever structure, include it in the service area, and provide a unit household having the same single protruding terrace in all households and a building structure using the same.

According to one form of the present invention for achieving the above object, in the method of constructing an apartment building formed by stacking a plurality of floors so that at least one unit household is formed on each floor, each unit household has at least one wall cantilever ( 100) is formed, and the wall cantilever 100 is stacked every other time to face the first direction or the second direction, and in the unit household located on the upper layer of the wall cantilever 100 facing the first direction, the first direction and the 90 The wall cantilever 100 is formed so as to face the second direction having an angle greater than or equal to 10 degrees.
Meanwhile, in the plurality of wall cantilevers 100 facing the first direction, a pair of inner load-bearing walls 200a having a predetermined length β are continuously formed throughout the entire layer, and a plurality of wall cantilevers facing the second direction ( 100), a pair of inner load-bearing walls 200a having a predetermined length β are continuously formed throughout the entire floor, and the inner load-bearing walls 200a perform a structural function, and the wall cantilever 100 formed in each unit generation ) extends outward from the inner load-bearing wall 200a and protrudes by an extension length α to form a pair of outer load-bearing walls 200b having a predetermined length α, and vertically adjacent wall cantilevers of each unit household. Between the 100, three sides are exposed to the outside, and an empty space 104 is provided so that a single protruding terrace 110 for each unit household without a column is provided, and is located in the first or second direction of the unit household. A bedroom 130 is provided in the wall-type cantilever 100, and a kitchen 120 is provided between the inner load-bearing walls 200a in the second direction or the first direction corresponding thereto, and a terrace outside the kitchen 120. 110 is provided, and a living room 140 is provided in the extended slab space between the bedroom 130 and the kitchen 120, and the vertically adjacent unit household has a bedroom 130, a kitchen 120, and a terrace. (110) are disposed so as to cross each other, and the shaft portion 400 surrounded by walls is continuously formed throughout the entire floor on the inner load-bearing walls 200a formed in the first and second directions, respectively, so that the toilet in the bedroom 130 (T) or through the kitchen (120).

According to the present invention, it is preferable that the ratio of the extension length (α) of the outer load-bearing wall to the length (β) of the inner load-bearing wall of each unit generation of the wall-type cantilever 100 is 3/4 or less.

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In addition, in the wall-type cantilever structure building formed according to the present invention, the unit households range from small-sized unit households to large-sized units through horizontal expansion of additional slabs without structural changes in the bedroom 130, kitchen 120, and terrace 110. It is possible to plan the structure up to unit households with acreage.

From the above features, the present invention can be easily applied to a vertical high-rise building using a wall cantilever structure for a terrace, which was easily applicable only to an apartment house built on a substantially sloping hill.

In addition, the present invention provides a building structure in which one unit is formed through repeated arrangement and stacking of unit households, and each unit household has an independent protruding terrace with the same area as all households using a wall cantilever structure. It is possible to overcome the size and area limitations of unit household terraces.

In addition, the present invention forms a column-less structure in the terrace by having a wall-type cantilever structure for each household, and the terrace is connected to the kitchen and internal connectivity can be improved by separation using windows instead of walls, In addition, since there are no pillars, three sides are open, improving the right of view, and having a large terrace as a service area, so a wider space can be used. In addition, since at least a part of the terrace formed without the installation of pillars is not included in the exclusive area of unit households according to the Building Act, there is an advantage in solving the problem of sales price or tax increase.

In addition, the wall-type cantilever structure building according to the present invention does not overlap with the terraces of other households in the longitudinal direction and provides a terrace structure independent of the terraces of other households at the same level in the horizontal direction, front, rear, left, and right. Individual privacy can be guaranteed between adjacent generations.

In addition, since the wall-type cantilever structure building according to the present invention is basically composed of an “a”-shaped structure, and the inner part of “a” is used as a living room, inconvenience in living room life due to noise from the kitchen due to the wall between the living room and the kitchen It has the advantage of being able to block.

In addition, since the wall-type cantilever structure building according to the present invention has a structure that is symmetrical to each other in the intersecting and orthogonal directions for each floor, only the location of the bedroom, kitchen, and terrace is different, and the existing piping location of each room can be used as it is. It has the advantage of being easy to use.

In addition, the present invention can configure the space of a unit household into an internal space and an external space through a terrace formed by a wall-type cantilever structure, so that it can be used as a shelter that helps evacuation, safety, and rescue in case of fire as well as expansion of living space. It is possible to provide an apartment building having a function.

1 is a conceptual diagram explaining a wall-type cantilever structure as a construction method for providing a single protruding terrace for each unit household of the present invention;
2 is a plan view showing the concept of flat arrangement for each unit household according to FIG. 1;
3 is a modeling perspective view of a wall cantilever structure building according to the present invention
4 is a plan view showing a comparison of the interlayer structure and unit household arrangement of FIG. 3;
5 is a plan view of unit households by floor in FIG. 3;
Figure 6 is a cross-sectional view along line AA of Figure 5;
7 is a plan view of a wall-type cantilever structure building according to the floor-by-floor household arrangement;
8 is an enlarged view of a partial external appearance of a wall-type cantilever structure building according to the present invention;
9 is a schematic bird's-eye view of a wall-type cantilever structure building according to the present invention.

Hereinafter, the present invention will be described in more detail through the accompanying drawings and embodiments.

In the following embodiments, the drawings and descriptions are omitted except for essential parts in describing the invention, and the same reference numerals are assigned to the same and similar elements throughout the specification, and detailed descriptions thereof will be omitted without repetition. do.

1 shows the concept of a wall cantilever structure for providing a single protruding terrace for each unit household according to the present invention and the basic principle of terrace configuration through it. In the present invention, the wall cantilever structure is provided as a box-shaped vertical square tubular module. It means that the wall cantilever 100 is formed by the load-bearing wall by stacking the load-bearing wall slab structure 1 so that a plurality of layers are crossed and perpendicular to each other in the longitudinal direction.

Such a wall-type cantilever may be formed in a single-column structure as shown in FIG. 1A or in a multi-column structure with two or more columns as in FIG. 1B. As shown, there is a natural empty space (s) (4) (5) between the upper and lower cantilevers (2) and the lower cantilever (3) formed by vertically crossing and orthogonal stacking of the load-bearing wall slab structure (1) in the longitudinal direction. is formed One or more such empty space(s) 4 and 5 may be formed in the front and rear or left and right directions of the stacked structure, and may be formed as a cross layer in the vertical direction.

The basic concept of the present invention is to form an independent protruding terrace for each unit household by utilizing the empty space(s) formed by such a wall-type cantilever structure. Through the same layered structure while forming an independent structure without overlapping each other, it is possible to provide a structure in which all households of the apartment house have a terrace of the same area.

In this specification, the term 'terrace' represents an external space included in a unit household, and it should be understood that balconies, verandas, and the like belong to the same category. Therefore, in the following description, it will be collectively referred to as 'terrace' as a representative term.

2 is a plan view showing the concept of arrangement of unit households according to the vertical crossing and orthogonal stacking of the wall cantilever structure of FIG. 1, in the form of a plan view, and unit households and It shows what constitutes a common space.

FIG. 2A is a plan view of the one-column crossing/orthogonal stacking structure shown in FIG. 1A. The wall cantilever structure of the present invention is located at the center through vertical crossing/orthogonal lamination of the load-bearing wall slab structure (1; FIG. 1) in the longitudinal direction. A core (11), which is a common space, is formed, and a portion excluding the core is formed as a bedroom 12, and a direction perpendicular to the bedroom 12 around the core, that is, an empty space (s) in FIG. 1 ) (4), the kitchen 13 and the terrace 14 are formed outside the kitchen. Therefore, in FIG. 2A , unit households can be arranged symmetrically around the core 11, and this arrangement can also be arranged on a slope around the core 11.

FIG. 2B is a plan view of the cross/orthogonal stacked structure of two or more rows shown in FIG. 1B, and the core 21, which is a common space in the center, through vertical cross/orthogonal stacking of the load-bearing wall slab structure (1; FIG. 1) in the longitudinal direction. ) is formed and the remaining parts except for the core are formed as bedrooms 22, and the core 21 is centered in a direction perpendicular to the bedrooms 22, that is, in the empty space (s) 5 in FIG. 1B. A kitchen 23 and a terrace 24 outside the kitchen are formed at the corresponding part, respectively. Accordingly, in FIG. 2B , unit households may be arranged at the four corners around the core 21 .

3 is a modeling perspective view of a wall-type cantilever structure building according to the present invention, FIG. 4 is a plan view showing a comparison of the inter-floor structure and unit household arrangement of FIG. 3, FIG. 5 is a plan view of unit households by floor in FIG. 3, FIG. 6 is FIG. As a cross-sectional view of line A-A, in the wall cantilever structure building according to the present invention, individual unit households basically have a basic structure in the form of a bedroom 130, a kitchen 120, a terrace 110, and a living room 140 (see FIG. 4). ).

The wall-type cantilever structure building is a unit household in at least one of the front, back, left, and right directions by crossing and perpendicularly stacking a plurality of floors in the longitudinal direction of the load-bearing wall slab structure (1; FIG. 1) provided as vertical square tubular modules. As shown in FIG. 3, the wall cantilevers 100 in each direction have a shape that extends by a certain length in the outer direction of the unit household, and is a multi-layer cross/orthogonal stacked structure In at least one of the front, back, left, and right directions along the longitudinal direction, it is formed as a grid layer.

In addition, the wall cantilever 100 is a wall cantilever 100' of the upper layer portion 101 and a wall type of the lower layer portion 102 in at least one direction among the front, rear, left, and right directions according to vertical cross/orthogonal stacking. It is a form in which the inner load-bearing wall 200a of the middle layer portion 103 supports between the cantilevers 100 ", and a part of the space formed by the inner load-bearing wall 200a of the middle layer portion 103 constitutes the kitchen 120, and the kitchen The empty space 104 between the wall cantilever 100' of the upper layer portion 101 and the wall cantilever 100" of the lower layer portion 102 to the outside of the space is the space formed on the inner load-bearing wall 200a of the middle layer portion 103. Together with other parts, it is configured as a terrace (110; FIG. 4).

An apartment building having a wall cantilever structure according to the present invention is an upper floor unit household in the same direction as shown in FIG. ) and the lower floor unit household (Fig. 4b), the layout of the bedroom (R; 130), kitchen (K; 120), and terrace (S; 110) cross each other. For example, as shown in FIG. 5, between the first floor and the second floor, the second floor and the third floor, and the third floor and the fourth floor, the living room (R; 140) is centered on the bedroom 130. ), the arrangement of the kitchen 120 and the terrace 110 form a cross-section.

As such, in the present invention, when the bedroom 130, the kitchen 120, and the terrace 110 are cross-arranged by cross-laminating the load-bearing wall slab structures in the longitudinal direction, the inner load-bearing wall 200a dividing the kitchen in the unit household on the lower floor is formed on the upper floor. As a structure supporting the load of the wall cantilever 100 constituting the expansion room of the unit household, the middle layer portion formed between the wall cantilever 100' of the upper layer portion 101 and the wall cantilever 100" of the lower layer portion 102 ( It is possible to form a terrace 110 in the space outside the kitchen 120 of 103 (FIG. 3), as shown in FIG. 6, on the second floor between the first and third floors, and This can be understood through the fact that each terrace is formed in the space outside the kitchen on the 4th floor between the 3rd and 5th floors.

In the present invention, the wall cantilever 100 made of a load-bearing wall structure in the form of a square tube module is, as shown in Figs. When comparing the extension lengths (β) in the inner direction of the inner load-bearing walls that divide the interior, α < β must be satisfied. This is for the installation stability of the wall cantilever 100. For example, when the extension length (α) of the outer load-bearing wall protruding outside the household is 3 m, the extension length (β) of the inner load-bearing wall extending inside the household is 4 m or more. it is desirable Through this structure, the present invention has the advantage of being able to configure a wide terrace of 3m or more beyond the limit of forming only a terrace space of about 1m in the prior art.

Figure 7 shows the planar structure of the wall cantilever structure building of the present invention according to the arrangement of households on each floor. It is a two-level planar structure diagram, and FIG. 7c is a three-level planar structure diagram in which three unit households are arranged.

Here, you can see the form in which the load-bearing walls constituting the bedroom (R), kitchen (K), and terrace (S) are connected from the outside of the building to the inside of the unit household through the wall cantilever structure for each unit household. The kitchen (K) and the terrace (S) are arranged symmetrically with the bedroom (R) around the living room (L) when the load-bearing wall structure is stacked in the longitudinal direction. The facility space of my toilet (T) also has a structure that is symmetrical to each other. Therefore, the kitchen equipment space of the unit household on the upper floor and the toilet equipment space in the bedroom of the unit household on the lower floor, or the toilet equipment space in the bedroom of the unit household on the upper floor and the kitchen equipment space of the unit household on the lower floor are symmetrical to each other in the coaxial direction. , as described with reference to FIG. 4, a structure in which the arrangement of the bedroom 130, the kitchen 120, and the terrace 110 intersect each other between the unit household on the upper floor and the unit household on the lower floor in the same direction becomes possible. In addition, horizontal expansion such as bedroom 2 and bedroom 3 is possible without structural changes in the bedroom (R), kitchen (K), and terrace (S), making it possible to plan a structure from a unit household with a small acreage to a unit household with a large acreage. .

8 is an enlarged view of a partial exterior of a wall-type cantilever structure building according to the present invention, and FIG. 9 is a schematic bird's-eye view of a wall-type cantilever structure building according to the present invention. It is the first architectural style using a wall-type cantilever structure so that the easily applicable terrace structure can be easily applied to vertical high-rise buildings. Since it has a terrace structure independent of the terraces of other households at the same level as the left and right, there is an advantage that individual privacy can be guaranteed between adjacent households. In addition, in the wall cantilever structure building according to the present invention, in order to form a terrace protruding 1m or more in the conventional construction method, pillars should be installed at the bottom of the terrace to support the upper part. As the empty space naturally formed between the lower floors can be used as a terrace, it provides the advantage of being able to plan a terrace installation without installing additional pillars. Of course, in the case of a terrace formed without the installation of such pillars, at least a part of the terrace is not included in the exclusive area of a unit household under the Building Act, so there is an advantage in solving problems such as sale price or tax increase. In addition, since there are no pillars, three sides are open to improve the view, and since a large terrace can be used as a service area, a wider space can be used. In addition, the wall-type cantilever structure building according to the present invention basically has an “a”-shaped structure, and one side of “a” is composed of a bedroom 130 having the form of an extension room toward the outside of the unit household by the wall-type cantilever. And, the direction perpendicular to the bedroom (R; 130) to the other side of “a” consists of a kitchen (K; 120) and a terrace (S; 110) located outside the kitchen, and also to the inside of “a” The space between the bedroom and the kitchen is provided as the living room (L; 140), and since the inner part of “a” is used as the living room (L; 140), the wall between the living room and the kitchen prevents the living room from noise from the kitchen. It also has the advantage of being able to block the discomfort of In addition, although the direction of the expansion room by the wall cantilever is different between the upper floor and the lower floor, since each floor has a structure that is symmetrical to each other in the cross/orthogonal direction as in the present invention, only the location of the bedroom, kitchen, and terrace are different, It provides the advantage of facilitating design because the location of the pipe in the room can be used as it is. In addition, the present invention can configure the space of a unit household into an internal space and an external space through a terrace formed by a wall-type cantilever structure, so that it can be used as a shelter that helps evacuation, safety, and rescue in case of fire as well as expansion of living space. It is possible to provide an apartment building having a function.

Although various embodiments of the present invention have been described above, the contents described so far are merely examples of some of the preferred embodiments of the present invention, and specific terms or diagrams used in describing the present invention are merely It is used for the purpose of explaining the present invention, and is not used in a limiting or limiting sense. Therefore, it should be understood that those skilled in the art can make many changes, modifications, and substitutions of equivalents without departing from the technical spirit and gist of the invention within the scope described in the claims below. something to do.

1: load-bearing wall slab structure
2: upper layer cantilever
3: lower layer cantilever
4, 5: empty space(s)
11,21,300: core
12,22,130,R: Bedroom
13,23,120,K: Kitchen
14,24,110,S: Terrace
100,100',100" : Wall Cantilever
101: upper part
102: lower layer
103: middle layer
200a: inner load-bearing wall
200b: outer bearing wall
140: living room
T: bathroom

Claims (7)

In the method of building an apartment building in which a plurality of floors are laminated with at least 5 or more floors so that at least one unit household is formed on each floor,
At least one wall cantilever 100 is formed in each unit household, and the wall cantilever 100 is stacked at intervals toward a first direction or a second direction, and is placed on an upper layer of the wall cantilever 100 facing the first direction. In the unit household located, a wall cantilever 100 is formed to face a second direction having an angle of 90 degrees or more with the first direction,
In the plurality of wall cantilevers 100 facing the first direction, a pair of inner load-bearing walls 200a having a predetermined length β are continuously formed throughout the entire layer, and the plurality of wall cantilevers 100 facing the second direction A pair of inner load-bearing walls 200a having a predetermined length β are continuously formed over the entire layer, so that the inner load-bearing walls 200a provide structural stability,
The wall cantilever 100 formed in each unit generation extends outward from the inner load-bearing wall 200a and protrudes by an extension length α to form a pair of outer load-bearing walls 200b having a predetermined length α. , The ratio of the extension length (α) of the outer load-bearing wall (200b) to the length (β) of the inner load-bearing wall (200a) of each unit household of the wall-type cantilever (100) is 3/4 or less,
Between the vertically adjacent wall cantilevers 100 of each unit household, three sides are exposed to the outside, and an empty space 104 is provided so that a single protruding terrace 110 for each unit household is provided without a pillar,
A bedroom 130 is provided in the wall cantilever 100 located in the first or second direction of the unit household, and a kitchen 120 is provided between the inner load-bearing wall 200a in the second or first direction corresponding thereto. is provided, the terrace 110 is provided outside the kitchen 120, and the living room 140 is provided in the extended slab space between the bedroom 130 and the kitchen 120,
Unit households adjacent up and down are arranged at intervals so that the bedroom 130, the kitchen 120, and the terrace 110 cross each other, but the inner load-bearing walls 200a formed in the first and second directions are surrounded by walls, respectively. An apartment building construction method for providing a single protruding terrace for each unit household, characterized in that the shaft portion 400 is continuously formed throughout the entire floor and penetrates the bathroom T or the kitchen 120 in the bedroom 130, respectively.
delete delete delete delete delete According to claim 1,
The unit household is characterized in that it is possible to plan a structure from a unit household with a small acreage to a unit household with a large acreage through the horizontal expansion of additional slabs without structural changes in the bedroom 130, kitchen 120, and terrace 110 How to build an apartment house.

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