Construction method of multi floor building

Abstract

In the construction method of a multi floor building, non load bearing walls which are made from pre-cast concrete and are erected upon edge portions of the floor slabs, are formed of a height which is roughly equal to the height of each floor of the building. The non load bearing wall for an upper floor is elected upon the non lead bearing wall which has been erected upon the floor slab for a lower floor. A floor slab shuttering for the upper floor is built at the inner side of the non load bearing wall for the upper floor and at the partway in the vertical direction of the non load bearing wall for the upper floor, with the non load bearing wall forms a portion of the shuttering, and concrete is poured within this floor slab shuttering to construct the floor slab for the upper floor.

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a construction method of a multi floor building, and more particularly relates to a construction method of a multi floor building in which non load bearing walls such as balustrades or the like which are made from pre-cast concrete are provided at the edges of the floor slabs for each floor, and to a non load bearing wall of a multi floor building of the above type. Priority is claimed on Japanese Patent Application No. 2003-170806, filed Jun. 16, 2003, the content of which is incorporated herein by reference.

[0003] 2. Description of the Related Art

[0004] Conventionally, such as the one shown by way of example in FIGS. 33 through 41, have been proposed as methods for construction of a multi floor building in which a non load bearing wall, for example a balustrade, which is made of pre-cast concrete is provided at the edge of a floor slab (for example, refer to Japanese Patent Application, First Publication No. 2002-371519).

[0005] The multi floor building which is shown in these figures is one which has a structure in which a vacant portion P which is used as a parking area or the like is provided in a first floor portion beneath the floor slab S for the lowest inhabitable floor of the building (which is the second floor thereof). As non load bearing walls which will be described hereinafter, balustrades which are made from pre-cast concrete are provided at edge portions on both sides of the floor slab S, and the floor slabs and balustrades are made in multiple layers. In other words, if this bottommost floor slab S is designated as S(S1), further floors comprising floor slabs S(S2), S(S3), . . . and corresponding balustrades are provided in additional layers above this bottommost floor.

[0006] Furthermore, a construction method of the multi floor building will be explained with reference to the abovementioned figures.

[0007] First, as shown in FIG. 33, in order to define the vacant portion P, a plurality of columns 2 are erected upon a foundation 1 which has been laid in the ground G, and, after having assembled shuttering 3 for making the floor slab S upon these columns 2, the floor slab S1 for the lowest floor (the second floor portion of the building) is constructed, as shown in FIG. 34, by arranging reinforcing bars (not shown in the figures) in this shuttering 3 and by pouring concrete C thereinto, and by subsequently removing said shuttering 3 at a time when this concrete has hardened sufficiently to reach a predetermined strength. Furthremore, the reference symbol J in FIG. 33 denotes shoring for supporting said shuttering 3.

[0008] One of the two side portions of the floor slab S1 which has been made in this manner is destined to constitute the floor of a passageway D, while the other is destined to constitute the floor of a verandah E; and its central portion is destined to constitute the floor of a living space F.

[0009] Next, as shown in FIG. 34, wall panels 4 which are made from pre-cast concrete are erected as load bearing walls at the portions of the living region F where it borders upon said passageway D and said verandah E, and thereby said living region F is delimited, as shown in FIG. 35.

[0010] These wall panels 4 have been manufactured in advance in a factory or the like, and, after having been transported to the place where this building is to be constructed, are set in predetermined positions upon the floor slab S1 by using a crane or the like, and are fitted to the floor slab S1 by using a suitable connection method.

[0011] Furthermore, as shown in FIGS. 35 and 36, balustrades 5 which are made from pre-cast concrete, and which constitute non load bearing walls, are built upon both the edges of the floor slab S1, and thereby the construction of the lowest floor of the building is completed.

[0012] The erection of these balustrades 5 is performed by the same method as the erection of the previously described wall panels 4, and the setting up of these wall panels 4 and these balustrades 5 is performed over the entire extent of this floor slab S1 for the second floor portion.

[0013] Next, as shown in FIG. 36, upon this floor slab S1 for the second floor portion which has thus been constructed, the shuttering 3 for making the floor slab for the floor directly above (the third floor portion of the building) are set up by using large amounts of shoring J and the wall panels 4 which are previously erected as to function as support members. And then, after arranging reinforcing bars within this shuttering 3, as shown in FIG. 37, concrete is poured thereinto, so that thereby the construction of the floor slab S2 for the third floor portion of the building is completed.

[0014] After this, upon this floor slab S2 for the third floor portion of the building which has thus been constructed, as shown in FIG. 38, wall panels 4 are erected, and thereafter, as shown in FIGS. 38 and 39, balustrades 5 are made, and hereby the third floor portion of the building is completed.

[0015] Furthermore, upon this floor slab S2 for the third floor portion which has thus been constructed, the shuttering 3 for the fourth floor portion of the building are set up by using large amounts of shoring J and the wall panels 4 which are previously erected as to function as support members, as shown in FIG. 40. And then, by repeating the processes as described above for upper floors, multi floor building is constructed.

[0016] However, with this conventional construction method described above, there remain the following problems to be solved.

[0017] First, with this conventional construction method, the floor slab S is constructed first, and the wall panels 4 and the balustrades 5 for mounting upon this floor slab S are made subsequently in order. However, when performing the work of building these wall panels 4 and balustrades 5 upon the floor panel S, as shown in FIG. 38 for the third floor portion of the building by way of example, the surrounding edge portion of this floor panel S is open, and, since this is a situation in which no safeguard is provided. Accordingly, it is necessary to take very great care for ensuring safety.

[0018] Furthermore, in particular, when building the balustrades, the joints 6 between these balustrades and the floor slab S are made along the entire lengths of the balustrades 5 in the longitudinal direction, as shown in FIG. 41, and the work involved in the finishing processing for these joints 6 and in their waterproofing processing and so on must be performed as work on the outer side of the balustrades 5.

[0019] When this work is to be performed from above the floor slab S, it is necessary to perform it while leaning towards the outside over the upper edges of said balustrades 5, and not only is the workability of such a procedure very poor, but it is not desirable from the point of view of safety.

[0020] Furthermore, as shown in FIG. 37, the work of fitting together the shuttering 3 for the floor slab S of the next higher floor is work which must be performed at a level which is higher than the balustrades 5 which have already been built, and moreover, there is no safeguard for the the worker, as previously described. Accordingly, it is necessary to take great precautions for ensuring safety.

[0021] Even further, since the height of the region in which the work is being performed increases along with the progress of the work to higher floors. Accordingly, the precautions against accident which must be taken become steadily greater.

[0022] In the conventional construction method, as shown in FIG. 40, as such a type of precaution against accident, it is sometimes practiced to erect constructional scaffolding I at the side of the building, so as to perform the previously described building of the balustrades 5 and the processing work for the joints 6, and also the assembly work for the shuttering 3 for the next floor of the building, from upon this constructional scaffolding I.

[0023] However, with the use of the constructional scaffolding I, the width of treadboards, which are the regions where the worker must work and must move to and fro, is narrow. Furthermore, since reinforcement members for support columns which support the treadboards inevitably project onto the treadboards, the regions for working and for moving of the worker become even narrower. As a result, the problems remain to be solved that the activities of the worker are restricted, and also that the smoothness of their movements to and fro is reduced.

[0024] The present invention has been conceived in the light of the above described problems, and it takes as its objective to provide a construction method of a multi floor building, with which the constructional efficiency is excellent, along with enhancing the safety for working and for moving of the worker.

SUMMARY OF THE INVENTION

[0025] In order to solve the problems described above, the first process according to the present invention is a construction method of a multi floor building which comprises floor slabs which define each floor of the multi floor building, and non load bearing walls made from pre-cast concrete which are erected upon edge portions of the floor slabs, wherein the non load bearing walls are formed of a height which is roughly equal to the height of each floor of the multi floor building, and, after having erected the non load bearing wall for an upper floor upon the non lead bearing wall which has been erected upon the floor slab for a lower floor, a floor slab shuttering for the upper floor is built at the inner side of the non load bearing wall for the upper floor and at the partway in the vertical direction of the non load bearing wall for the upper floor, with the non load bearing wall serving as a portion of the shuttering, and concrete is poured within this floor slab shuttering so as to construct the floor slab for the upper floor of the building.

[0026] The second construction method of a multi floor building according to the present invention is distinguished in that, in the above described first construction method, before erecting the non load bearing wall for the upper floor, load bearing walls are erected upon the floor slab for the lower floor so as to define rooms upon the lower floor.

[0027] The third construction method of a multi floor building according to the present invention is distinguished in that, in the above described first or second construction method, connection reinforcing bars which project into the floor slab shuttering for the upper floor are provided to the non load bearing wall for the upper floor, and the non load bearing wall for the upper floor and the floor slab for the upper floor are joined together by embedding these connection reinforcing bars in the concrete which is poured into the floor slab shuttering for the upper floor.

[0028] The fourth construction method of a multi floor building according to the present invention is distinguished in that, in any one of the above described first through third construction method, at the joining portion between the upper and lower non load bearing walls, a metallic sleeve which extends along the direction of their mutual connection is embedded within either one of these non load bearing walls. Furthermore, a connection reinforcing bar which is inserted into the metallic sleeve is projected into the other one of these non load bearing walls, and the upper and lower non load bearing walls are connected together by, after having inserted this connection reinforcing bar into the metallic sleeve, filling grouting material into the metallic sleeve and allowing it to harden.

[0029] The fifth construction method of a multi floor building according to the present invention is distinguished in that, in any one of the above described first through fourth construction method, before pouring concrete into the floor slab shuttering for the upper floor, the non load bearing wall for the upper floor which constitutes a portion of this floor slab shuttering for the upper floor is connected to a structural element which is positioned on the inner side thereof.

[0030] The sixth construction method of a multi floor building according to the present invention is distinguished in that, in the above described fifth construction method, the structural element is the floor slab for the lower floor.

[0031] The seventh construction method of a multi floor building according to the present invention is distinguished in that, in the above described fifth construction method, the structural element is a load bearing wall which is erected upon the floor slab for the lower floor.

[0032] The eighth construction method of a multi floor building according to the present invention is distinguished in that, in any one of the above described first through seventh construction method, the non load bearing wall is a balustrade.

[0033] Furthermore, the first non load bearing wall for a multi floor building according to the present invention is a non load bearing wall made from pre-cast concrete which is erected at an outer edge portion of a floor slab of a multi floor building, which has a height roughly equal to the height of each floor of the multi floor building, and on which, moreover, a floor slab shuttering for the corresponding floor is built at the inner side of the non load bearing wall and at the partway in the vertical direction of the non load bearing wall, and the non load bearing wall constitutes a portion of the floor slab shuttering.

[0034] The second non load bearing wall for a multi floor building according to the present invention is the above described first non load bearing wall, distinguished in that a blind portion which hides the upper portion of the outer edge portion of the floor slab projects at least upward from the floor slab at the portion where the floor slab shuttering for the corresponding floor.

[0035] The third non load bearing wall for a multi floor building according to the present invention is distinguished in that, in the above described second non load bearing wall, joining wall portions which extend in the downward direction of the floor slab are formed at the lower portions of both the ends in the widthwise direction of the blind portion.

[0036] The fourth non load bearing wall for a multi floor building according to the present invention is distinguished in that, in the above described second non load bearing wall, joining wall portions which extend in the upward direction from the blind portions are formed at the upper portions of both the ends in the widthwise direction of the blind portion.

[0037] The fifth non load bearing wall for a multi floor building according to the present invention is distinguished in that, in the above described third or fourth non load bearing wall, a connecting block for joining together the upper and lower non load bearing walls is provided by dividing each of the joining wall portions in the vertical direction.

[0038] The sixth non load bearing wall for a multi floor building according to the present invention is distinguished in that, in any one of the above described first through fifth non load bearing walls, the non load bearing wall is a balustrade.

[0039] According to any of the above described first through eighth processes for construction of a multi floor building of the present invention, the non load bearing walls are formed of a height which is roughly equal to the height of each floor of the multi floor building, and, after having erected the non load bearing wall for an upper floor upon the non lead bearing wall which has been erected upon the floor slab for the lower floor, a floor slab shuttering for the upper floor is built at the inner side of the non load bearing wall for the upper floor and at the partway in the vertical direction of the non load bearing wall for the upper floor, with the non load bearing wall serving as a portion of the shuttering, and concrete is poured within this floor slab shuttering so as to construct the floor slab for the upper floor of the building; and accordingly, the following excellent beneficial results are obtained.

[0040] Since, before performing the construction of the upper floor of the building, it is possible to erect the non load bearing wall which is supported by the lower structure of the building which has previously been made, on the edge portion of the working region of the upper floor. Accordingly, it is possible to utilize this non load bearing wall as a protective fence for the working region for making the upper floor. As a result, along with it being possible to prevent objects falling from the edge portion of the working region, also it is possible to ensure the safety of the workers while they are working in this working region, and while they are moving therein.

[0041] Furthermore, by utilizing the non load bearing wall as a portion of the floor slab shuttering, the work of making this floor slab shuttering for the edge of the floor slab becomes unnecessary. Accordingly, it is possible to arrange that almost all of the work for constructing each floor of the building is work upon the inside of the non load bearing walls, in other words, is work upon the inside of the building which is being constructed. As a result, it is possible to dispense with the constructional scaffolding which was necessarily set up outside the main body of the building in the prior art.

[0042] Moreover, according to any of the above described first through sixth non load bearing walls for a multi floor building of the present invention, since this wall has a height roughly equal to the height of each floor of the multi floor building, and the floor slab shuttering for forming the floor slab for the corresponding floor is made partway along its height direction and the non load bearing wall serve as a portion of this floor slab shuttering, it is possible easily to form the protective fence for the working region when implementing the previously described processes for construction of a multi floor building of the present invention.

[0043] In particular, according to either of the above described third and fourth non load bearing walls for a multi floor building of the present invention, it is possible to ensure good lighting for the lower floor by forming joining wall portions which extend in the downward direction of the floor slab of the corresponding floor at the lower portions of both the ends in the widthwise direction of the blind portion of the above described second non load bearing wall, and by making an opening portion between the floor slabs for the upper and lower floors.

[0044] Furthermore, according to the fifth non load bearing wall for a multi floor building of the present invention, in the joining wall portion of the above described third or the fourth non load bearing wall, the connecting block for joining the upper and lower non load bearing walls is provided by dividing each joining wall portion in the vertical direction; and thereby it is possible to reduce the height of this non load bearing wall during transportation.

BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG. 1 is an elevation view of a portion of a multi floor building, showing a first preferred embodiment of the present invention.

[0046] FIG. 2 is a sectional side view of a portion of the multi floor building, showing this first preferred embodiment of the present invention.

[0047] FIG. 3 is an external perspective view of a balustrade, showing this first preferred embodiment of the present invention.

[0048] FIG. 4 is an enlarged vertical sectional view showing this first preferred embodiment of the present invention, and showing the state of a balustrade for an upper floor and a balustrade for a lower floor before they are connected together.

[0049] FIG. 5 is an enlarged vertical sectional view showing this first preferred embodiment of the present invention, and showing the state of the balustrade for the upper floor and the balustrade for the lower floor when they have been connected together.

[0050] FIG. 6 is an enlarged vertical sectional view showing a procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0051] FIG. 7 is an elevation view showing this procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0052] FIG. 8 is an elevation view showing this procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0053] FIG. 9 is an elevation view showing this procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0054] FIG. 10 is a vertical sectional side view showing this procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0055] FIG. 11 is an elevation view showing this procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0056] FIG. 12 is a vertical sectional side view showing this procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0057] FIG. 13 is an elevation view showing this procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0058] FIG. 14 is a vertical sectional side view showing this procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0059] FIG. 15 is an elevation view showing this procedure for construction of a multi floor building to which the first preferred embodiment of the present invention has been applied.

[0060] FIG. 16 is an elevation view showing a procedure for construction of a multi floor building to which a second preferred embodiment of the present invention has been applied.

[0061] FIG. 17 is an elevation view showing a portion of a multi floor building to which the second preferred embodiment of the present invention has been applied.

[0062] FIG. 18 also illustrates this second preferred embodiment of the present invention, and shows an enlarged vertical sectional view of the situation before an upper portion balustrade and a lower portion balustrade and a connecting block have been connected together.

[0063] FIG. 19 illustrates this second preferred embodiment of the present invention, and shows an enlarged vertical sectional view of the situation when the upper portion balustrade and the lower portion balustrade and the connecting block have been connected together.

[0064] FIG. 20 is an external perspective view showing a variant of the second preferred embodiment of the present invention, and shows the portion at which the upper portion balustrade and the lower portion balustrade and the connecting block are connected together.

[0065] FIG. 21 is an external perspective view showing a variant of the second preferred embodiment of the present invention, and shows the portion at which the upper portion balustrade and the lower portion balustrade and the connecting block are connected together.

[0066] FIG. 22 is an external perspective view showing a variant of the second preferred embodiment of the present invention, and shows the situation before the upper portion balustrade and the lower portion balustrade and the connecting block have been connected together.

[0067] FIG. 23 is an enlarged vertical sectional view showing a variant of the second preferred embodiment of the present invention, and shows the situation before the upper portion balustrade and the lower portion balustrade and the connecting block have been connected together.

[0068] FIG. 24 is an enlarged vertical sectional view showing a variant of the second preferred embodiment of the present invention, and shows the situation while the upper portion balustrade and the lower portion balustrade and the connecting block are being connected together.

[0069] FIG. 25 is an enlarged vertical sectional view showing a variant of the second preferred embodiment of the present invention, and shows the situation when the upper portion balustrade and the lower portion balustrade and the connecting block have been connected together.

[0070] FIG. 26 shows another variant of the second preferred embodiment of the present invention, and is an external perspective view of a connecting block.

[0071] FIG. 27 is an enlarged vertical sectional view showing another variant of the second preferred embodiment of the present invention, and shows the situation during formation of the connecting block.

[0072] FIG. 28 shows another variant of the second preferred embodiment of the present invention, and is an external perspective view of a connecting block.

[0073] FIG. 29 is an exploded perspective view showing a third preferred embodiment of the present invention, which is a balustrade which serves as a non load bearing wall.

[0074] FIG. 30 is an external perspective view showing this third preferred embodiment of the present invention, which is a balustrade which serves as a non load bearing wall.

[0075] FIG. 31 is an external perspective view showing a fourth preferred embodiment of the present invention, which is a balustrade which serves as a non load bearing wall.

[0076] FIG. 32 shows a variant embodiment of the present invention, and particularly shows the essential portions of a support construction for a non load bearing wall in an enlarged vertical sectional view.

[0077] FIG. 33 is a vertical sectional view showing one stage in a conventional construction method of a multi floor building.

[0078] FIG. 34 is a vertical sectional view showing a further stage in this conventional construction method of a multi floor building.

[0079] FIG. 35 is a vertical sectional view showing a yet further stage in this conventional construction method of a multi floor building.

[0080] FIG. 36 is a vertical sectional view showing a yet further stage in this conventional construction method of a multi floor building.

[0081] FIG. 37 is a vertical sectional view showing a yet further stage in this conventional construction method of a multi floor building.

[0082] FIG. 38 is a vertical sectional view showing a yet further stage in this conventional construction method of a multi floor building.

[0083] FIG. 39 is an elevation view showing a yet further stage in this conventional construction method of a multi floor building.

[0084] FIG. 40 is a vertical sectional view showing a yet further stage in this conventional construction method of a multi floor building.

[0085] FIG. 41 is an elevation view showing a yet further stage in this conventional construction method of a multi floor building.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0086] The first preferred embodiment of the present invention will now be explained with reference to FIGS. 1 through 15.

[0087] It should be understood that the basic construction of the multi floor building according to this preferred embodiment of the present invention is the same as that of the prior art multi floor building which was shown in FIGS. 33 through 41 and described above. That is, the explanation will be made in terms of showing a balustrade as an example of a non load bearing wall, and moreover in terms of application of the present invention to a multi floor building of which the first floor portion comprises a vacant portion which is to be utilized as a parking area or the like. It should be understood that the portions of this multi floor building which are the same as ones of the prior art type multi floor building previously described and which have the same functions will be denoted by the same reference symbols as in the previous description, and their explanation will be curtailed.

[0088] First, before explaining the construction method of a multi floor building according to this first preferred embodiment of the present invention, the structure of a balustrade, which is taken as an example of a non load bearing wall which is suitable for use in this process of construction, will be explained with reference to FIG. 1.

[0089] In FIGS. 1 and 2 it is shown that the balustrades 20 according to this first preferred embodiment of the present invention are of approximately the same height H for each of the floors of this multi floor building B. Furthermore, with, partway along their height direction, as shown in FIG. 3, there being provided the floor slab shuttering 3 for making the floor slab of the corresponding floor (the floor in which the balustrades 20 is provided), so that each of these balustrades 20 includes a portion of this floor slab shuttering 3 in its basic structure. In contrast, FIGS. 1 and 2 show the subsequent state in which the floor slab S which is made by using this floor slab shuttering 3 has been formed, and accordingly the floor slab shuttering 3 is arranged so as to surround the floor slab S.

[0090] To describe it in detail, the balustrade 20 is a balustrade which is made of pre-cast concrete and which is made in advance in a factory or the like, and a number of reinforcing bars (not shown in the figures) are embedded in its interior, so as to ensure that it has a predetermined desired strength.

[0091] Furthermore, as shown in FIGS. 1 through 3, in the balustrade 20, at the portion at which the floor slab shuttering 3 of the corresponding floor is provided, there is formed a blind portion 21 which projects at least in the upward direction from the floor slab S and which hides an upper portion of the outer edge portion of this floor slab S. Furthermore, at the lower portions at both ends in the widthwise direction of this blind portion 21, there are formed respective joining wall portions 22 which extend in the downwards direction from the floor slab S of this floor.

[0092] Each of these joining wall portions 22 is made, in cross section, in a rectangular shape, and both end portions of the blind portion 21 which are connected to these two joining wall portions 22 are made to be of the same thickness as the thickness of these joining wall portions 22, with two main reinforcement bars 23 which are embedded so as to pass through from each of the joining wall portions 22 into and through each of the end portions of the blind portion 21.

[0093] Furthermore, the positions of the blind portion 21 other than those which are connected to the joining wall portions 22 are made to be thin, and, in these thin portions there are formed a plurality of slits 24, with the objectives of reducing the weight of the balustrade 20 and improving lighting, and also of enlarging the field of view.

[0094] In the interior of each of the joining wall portions 22, at its lower portion, there are embedded a metallic sleeves 25 which are coaxial with the respective main reinforcement bars 23. As described hereinafter in detail with reference to FIGS. 4 and 5, the lower end of each metallic sleeve 25 opens at the lower edge surface of the joining wall portion 22. Furthermore, in the upper end portion of each metallic sleeve 25, the lower end of each main reinforcement bar 23 is inserted for a predetermined distance, and this main reinforcement bar 23 is connected to the metallic sleeve 25 by welding or the like.

[0095] Furthermore, injection tubes 26 which connect and lead to the interiors of these metallic sleeves 25 are fixed to a side wall of each metallic sleeve 25 at two positions which are spaced apart by a certain interval in the axial direction of the metallic sleeves 25. These injection tubes 26 project to the exterior of the joining wall portion 22 from the side surface of the joining wall portion 22 which faces to the interior of the building.

[0096] Furthermore, the end portions of the main reinforcement bars 23 project at the upper ends of the blind portions 21 of this balustrade 20 for a predetermined distance, and these projecting end portions of the main reinforcement bar 23 serve as connection reinforcement bars, so as to connect together the balustrade 20 of an upper floor and the balustrade 20 of the lower floor.

[0097] In other words, when connecting together the balustrade 20 on an upper floor of the building and the balustrade 20 on the lower floor of the building, first, as shown in FIG. 5, the main reinforcement bars 23 which project from the lower floor balustrade 20 are inserted by just a predetermined distance into the lower end portions of the metallic sleeves 25 which are embedded in the connecting foot portions 22 of the balustrade 20 of the next upper floor portion of the building which is to be laid upon this lower floor portion thereof. Next, as shown in FIG. 5 by the arrow signs, a high strength non-shrink mortar is poured into the metallic sleeves 25, in order to serve as a grouting material, and, by this non-shrink mortar hardening, the main reinforcement bars 23 of the lower floor are connected to the main reinforcement bars 23 of the upper floor via the metallic sleeves 25, so that, as a result, the balustrade 20 of the upper floor of the building and the balustrade 20 of the lower floor of the building are mutually connected together.

[0098] Furthermore, a plurality of internal projections 25a are provided in the interior of the metallic sleeve 25, at roughly the central portion thereof in its longitudinal direction, spaced apart at intervals around its circumferential direction. These internal projections 25a, along with limiting the distance by which the main reinforcement bars can enter thereinto, in other words the distance by which they are swallowed up therein. These internal projections 25a also regulate the dimensions of the joints 27 which are formed between the balustrade 20 of the lower floor of the building and the balustrade 20 of the upper floor of the building which are mutually joined together.

[0099] In FIGS. 4 and 5, the reference symbol 28 denotes a spiral reinforcement member which is provided so as to surround each of the metallic sleeves 25. This spiral reinforcement member 28 increases the bonding strength between the metallic sleeve 25 and the concrete by being embedded in the concrete of the balustrades 20 and being unified in the concrete of the balustrades 20 along with the metallic sleeves 25.

[0100] Furthermore, the reference symbols 29 in FIG. 3 denote connection reinforcing bars which, when the floor slab shuttering 3 is built up upon the interior side of the balustrade 20 (the side of the main body of the building), project within this floor slab shuttering 3, and which serve to connect and unify this balustrade 20 with the concrete for the floor slab which is poured into this floor slab shuttering 3.

[0101] These connection reinforcing bars 29 are provided in large numbers at a fixed interval apart along the widthwise direction of the balustrade 20 at the portion thereof where thed floor slab shuttering is to be built up. Furthermore, the main portions of these connection reinforcing bars 29 are connected to reinforcing bars (not shown in the figures) which are provided within the balustrade 20 itself.

[0102] Next, the construction method of a multi floor building B using a balustrade 20 which has the above described structure will be explained with reference to FIGS. 6 through 15.

[0103] The multi floor building to which this preferred embodiment of the present invention is applied is the same as the previously described prior art type multi floor building, in that a vacant portion P which is to be used as a parking space or the like is provided in the first floor portion of the building below the floor slab S1 for the lowest inhabitable floor of the building (on the second floor thereof). Furthermore balustrades 20, which function as the previously described non load bearing walls, and which are made in a structure as described above from pre-cast concrete, are provided at both the edge portions of this floor slab S; and this construction is repeated in multiple layers upwards.

[0104] To describe the construction process in detail, first, as shown in. FIG. 6, the vacant portion P is defined by a plurality of columns 2 and beams 7 laid upon a foundation 1, and by the floor slab S1 for the lowest floor of the building (its second floor) which is built upon these columns 2 and beams 7.

[0105] And, as shown in FIGS. 6 and 7, living regions F are delimited by, as shown in FIG. 6, erecting wall panels 4 which are made from pre-cast concrete as load bearing walls at the boundary portions between these living regions F and passageways D and verandahs E.

[0106] Furthermore, balustrades 5 are erected at both the edges of the floor slab S1, as shown in FIGS. 6 and 7, but these balustrades upon the lowest floor level are of the same structure as prior art type balustrades; and, thus, the process of constructing the second floor portion of the building is completed by building these balustrades 5 upon the upper sides of both the edges of the floor slab S1.

[0107] After having erected the wall panels 4 and the balustrades 5 upon the floor slab S1 of the second floor portion of the building in this manner, upon each of the balustrades 5, as shown in FIGS. 6 and 8, a balustrade 20 according to this first preferred embodiment of the present invention is lifted in order by a crane or the like and is lowered into its predetermined position while adjusting its position appropriately, and then these balustrades 20 are connected to the balustrades 5 below them, as shown in FIG. 9, so as to erect the balustrades 20 above the balustrades 5.

[0108] The connection together of one of the balustrades 5 and one of the balustrades 20 of this type is performed by pursuing the following procedure.

[0109] As shown in FIG. 4, after having mutually positionally adjusted the lower balustrade 5 and the upper balustrade 20 so that each of the metallic sleeve 25 which are embedded in the lower portions of the joining wall portions 22 of the upper balustrade 20 is positioned so as to be coaxial with each of the main reinforcement bars 23 which project from the upper surface of the lower balustrade 5, the upper balustrade 20 is lowered, and, as shown in FIG. 5, each of the main reinforcement bars 23 is inserted into the metallic sleeves 25, and thereby the lower balustrade 5 and the upper balustrade 20 are connected together.

[0110] Here, the amount by which the main reinforcement bars 23 of the lower balustrade 5 come to be inserted into the metallic sleeves 5, in other words the degree by which they extend into the metallic sleeves 5, is limited by the ends of the main reinforcement bars 23 coming into contact with the internal projections 25a which project inwards from the inner surfaces of the metallic sleeves 25.

[0111] As a result, a predetermined gap, in other words, a joint 27 is created between the lower balustrade 5 and the upper balustrade 20.

[0112] Next, a high strength non-shrink mortar is poured into the metallic sleeves 25 through the lower injection tubes 26, and this mortar flows into the gaps between the metallic sleeves 25 and the main reinforcement bars 23 and fills them up, thereafter hardening.

[0113] By doing this, the main reinforcement bars 23 and the metallic sleeves 25 are fixedly connected together, and as a result the balustrades 5 and 20 are fixedly connected together.

[0114] And, as for closing up the joint 27, this may be done either by continuing to pour the non-shrink mortar which is being poured into the metallic sleeves 25 up to and into the joint 27, or alternatively by, before joining the balustrades 5 and 20 together as described above, first piling up mortar spread upon the upper surface of the lower balustrade 5 where it is to mate with the upper balustrade 20.

[0115] Next, outer surface processing of the joint is performed, and thereby the work of finishing processing for the connection together of the balustrades 5 and 20 is completed.

[0116] Although this type of work for positionally adjusting the relative positions of the two balustrades 5 and 20, and the work of mating them together, and the work of pouring the non-shrink mortar into the metallic sleeves 25, is performed upon the floor slab S1, nevertheless, since the lower balustrade 5 is at this time erected upon the side edge portion of this floor slab S1, therefore in practice the side edge of the floor slab S1, which is the working region, is closed off by the balustrade 5. Accordingly the safety for the worker is improved, and moreover, even if an object which falls upon the floor slab S1 rolls as far as the side edge portion of the floor slab S1, it strikes against the balustrade 5, and accordingly is prevented from falling further downwards.

[0117] Furthermore, in this first preferred embodiment of the present invention, when performing the finishing work for the joint 27 between the balustrades 5 and 20, since this joint 27 is at the level of the upper surface of the lower balustrade 5, the worker can perform the work from the inner side of the balustrade 5 in a very comfortable posture, without being required to assume any unreasonable attitude such as stooping or the like.

[0118] Moreover, during the finishing operation for this joint 27, the worker can perform the work in a situation in which they are protected by the lower balustrade 5. Furthermore, since the width of the joint 27 is short, it is possible to perform the work from the inner side of the balustrade 5 at a range which can easily be reached by hand. Accordingly, a high level of safety is assured for the work.

[0119] After having erected the upper balustrades 20 upon the balustrades 5 for the second floor portion of the building as described above, the floor slab shuttering 3 for the next higher floor (the third floor portion of the building) is constructed on the inner side of these balustrades 20. In this case, before constructing this floor slab shuttering 3, as shown in FIG. 10, supports 30 are provided between said balustrades 20 and the floor slab S1 for the floor below, and thereby the balustrades 20 are supported so that they do not fall over.

[0120] These supports 30 are provided with the intention of supporting the balustrades 20. However, in order to assure their function, the angle at which they are set with respect to the floor slab S1 becomes very important. When an attempt is made to ensure that this setting angle is appropriate, it may happen that interference undesirably occurs between the supports 30 and the wall panels 4 which are being erected upon the interior portion of the floor slab S1. In this case, as shown in FIG. 10, this problem is solved by leading these supports 30 out to the outsides of the wall panels 4 via opening portions which are formed in these wall panels 4 (such as opening portions which are provided for setting windows or entrances and exits such as vestibules or the like).

[0121] Next, a large number of shoring members J are set up upon the floor slab S1, and these shoring members J and the wall panels 4 which have already been erected serve as supporting members for making the floor slab shuttering 3 for the next floor up (the third floor portion of the building), as shown in FIGS. 10 and 11.

[0122] Furthermore, with this floor slab shuttering 3, as shown in FIG. 10, its side edge portions are made on the inside sides of the blind portions 21 of the balustrades 20, and as a result, the balustrades 20 constitute a part of the floor slab shuttering 3.

[0123] Furthermore, according to requirements, the one end portions of wires 31 may be fixed to the upper edge portions of the upper balustrades 20, and the other end portions of these wires 31 may be fixed to the floor slab S1 after they have passed through the floor slab shuttering 3, so that falling over of the balustrades 20 is positively prevented, or alternatively, as will be described hereinafter, deviation of the pouring pressure of the concrete which is poured into the floor slab shuttering 3 may be prevented.

[0124] Although these wires 31 are passed through the floor slab shuttering 3, as described above, since it is possible to provide sleeves or the like at the positions of the floor slab shuttering where these wires 31 are required to pass through, and to remove the wires 31 when concrete has been poured, so that the wires can be placed without exerting any influence upon the floor slab S2.

[0125] In addition, after having thus removed the wires, by closing up the abovementioned sleeves with joint mortar or the like, it is possible to rectify the external appearance of the floor slab S2.

[0126] Next, after having placed reinforcing bars (not particularly shown in the figures) within the floor slab shuttering 3, by pouring concrete into said floor slab shuttering 3 as shown in FIG. 37, the floor slab S2 for the third floor portion of the building is constructed as shown in FIGS. 12 and 13.

[0127] After this, wall panels 4 are erected upon this floor slab S2 for the third floor portion of the building which has been constructed, as shown in FIG. 14, and thereby the construction of the third floor portion of the building is completed.

[0128] In this case, joints of the order of size of a few centimeters are formed between neighboring ones of the balustrades 20 so as to extend along the vertical direction, and the concrete pouring space within the floor slab shuttering 3 is communicated to the outside through these joints. Accordingly, when the concrete is poured into the floor slab shuttering 3, water of the concrete which has been poured into the floor slab shuttering 3 may leak out from these joint portions. To prevent this leakage of the water, it is desirable to insert a sealing substance into these joint portions before pouring the concrete.

[0129] Furthermore, positional deviation of the balustrade 20 which constitutes a portion of the floor slab shuttering 3 due to the pouring pressure of the concrete or the like when the concrete for the floor slab S2 for the upper floor is poured in this way is prevented, since the balustrade 20 is supported by the supports 30, or by the wires 31 which are put into place according to requirements, as has been mentioned above.

[0130] Yet further, as shown in FIGS. 14 and 15, after having again constructed further layer of floor slab shuttering 3, the floor slab S3 for the fourth floor portion of the building is constructed upon the floor slab S2 for the third floor portion of the building by pouring concrete according to the method shown in FIGS. 10 and 11. And thereafter these identical processes are repeated in sequence, the multi floor building is constructed.

[0131] Also, during the construction of the floor slab shuttering 3 for each floor, for the work of making the lower portions of the floor slab shuttering 3, the blind portions 21 of the balustrades 20 are erected in the upwards direction at the edges of the floor slab S which is the working region; and furthermore, even for the work of erecting the upper portions of the floor slab shuttering 3 and for the work of inserting reinforcing bars into the floor slab shuttering 3, the blind portions 21 of the balustrades 20 are erected from its side edge portions upwards. Accordingly, the blind portions 21 of these balustrades 20 constitute protective fences, so that not only are objects prevented from falling over the edge of the floor slab S and down the exterior of the building, but also the safety of the workers while they are working and also while they are moving about is positively assured.

[0132] Furthermore, since the previously described treadboards are above the floor slab S for the floor below or are above the shuttering for the above, the ease of working is also enhanced by ensuring that the working region is wide.

[0133] Moreover, due to the use of the balustrades 20 as parts of the floor slab shuttering 3, the work of assembling framing at the edges of the floor slab S becomes unnecessary.

[0134] In addition according to the present invention as described above, the remaining work for each floor becomes work within the main body of the building, therefore the constructional scaffolding which was required in the prior art to be put into place outside the main body of the building becomes unnecessary with the present invention. As a result, the work of putting this constructional scaffolding into place and the work of removing it after use become unnecessary, the probability of occurrence of accidents is greatly reduced, and moreover, the overall cost of construction is reduced. Furthermore, since no constructional scaffolding is required, the countermeasures which are needed in the workplace during high winds become extremely simple.

[0135] In this construction, the supports 30 and the wires 31 which support the balustrades 20 may also use the wall panels 4 which are erected upon the floor slab S for the lower floor, as the portions to which their inner end portions are fixed, rather than the floor slab S as previously described.

[0136] Next, a second preferred embodiment of the present invention will be explained with reference to FIGS. 16 through 21.

[0137] The reference symbol 40 in this figures denotes a balustrade according to this second preferred embodiment of the present invention. With this balustrade 40, the end portion of each of the joining wall portions 22 which are provided as connecting to the lower portions of the blind portions 21 is made as a connecting block 41 which is formed as a separate unit. Furthermore, the upper and lower balustrades 40 are mutually connected together via these connecting blocks 41. The reason why this type of structure is adopted is as follows.

[0138] That is, it is necessary to transport the balustrades 20, which have been produced in a factory, to the place where the multi floor building B is being erected by a truck or the like. However, when as previously described the height of the balustrades 20 is matched to the height of each floor of the building, it may happen that this height of the balustrades 20 exceeds the maximum height specified by law of the load which the truck can carry, which creates a problem with regard to delivery of the balustrades 20.

[0139] Accordingly, in this second preferred embodiment of the present invention, the height of the balustrades 20 when they are being transported upon a truck is restricted by segmenting the joining wall portions in the vertical direction. Accordingly, the height of the connecting blocks 41 is set in relation to the height of each floor of the multi floor building B, and also in relation to the maximum height specified by law of the load which the truck can carry.

[0140] To explain this in more detail, in this second preferred embodiment of the present invention, at both of the end portions in the widthwise direction of the balustrades 40, there are provided the two main reinforcement bars 23 which extend in the vertical direction and which are parallel to one another, and each of these main reinforcement bars 23 constitutes a connection reinforcing bar which projects by a predetermined distance from the lower end of the joining wall portion 22 and from the upper end of the blind portion 21.

[0141] In the interior of each of these connecting blocks 41, there are provided a pair of metallic sleeves 25 which are identical to the metallic sleeves 25 which were shown and described above with respect to the first preferred embodiment of the present invention. As shown in FIG. 18, these metallic sleeves 25 are embedded within each connecting blocks 41 so as to extend parallel with one another and so as to open to the upper and lower sides of the connecting blocks 41; and spiral reinforcement member 28 is provided so as to surround the outer circumferential portion of each of these metallic sleeves 25.

[0142] Furthermore, internal projections 25a are provided at the central internal circumferential portions in the longitudinal direction of each of these metallic sleeves 25, and moreover, to the side wall of each of the metallic sleeves 25, there are fixed a pair of injection tubes 26 which are connected to the internal space within the metallic sleeve 25 and which are spaced apart from one another in the longitudinal direction by a certain interval. These injection tubes 26 are projected to the exterior of the connecting block 41, and the connecting block 41 is fitted to the building in an orientation in which these injection tubes 26 point towards the interior of the building.

[0143] In this second preferred embodiment of the present invention, as shown in FIG. 16, the connecting blocks 41 are laid upon the lower balustrade 40 (or 5), and then further the upper balustrade 40 is laid over these connecting blocks 41, and these members are then all connected together. The state in which the balustrades 40 have been built up as far as the fourth floor portion of the building is shown in FIG. 17.

[0144] To describe the method for connecting together the various floors in detail, as shown in FIG. 18, the connecting blocks 41 are lowered down after they have been positionally adjusted so that their metallic sleeves 25 become coaxial with the main reinforcement bars 23 of the lower balustrade 40 (or 5), and thereby these main reinforcement bars 23 are inserted into the metallic sleeves 25 from below.

[0145] Next, the upper balustrade 40 is lowered down after having been positionally adjusted so that its main reinforcement bars 23 which project downwards from it become coaxial with the metallic sleeves 25 of the connecting blocks 41, and thereby these main reinforcement bars 23 are inserted into the metallic sleeves 25 from above.

[0146] In this setting up work, the relative positions of the various members are limited by the ends of the main reinforcement bars 23 coming into contact with the internal projections 25a within the metallic sleeves 25, and, as shown in FIG. 19, joints 27 are thereby created, each with a predetermined interval between its mutually confronting surfaces.

[0147] Next, a high strength non-shrink mortar is injected into the interiors of the metallic sleeves 25 via the lower injection tubes 26. When this non-shrink mortar has hardened, the upper and lower balustrades 40 (or 5) are connected together via the metallic sleeves 25 and the various main reinforcement bars 23 while sandwiching the connecting blocks 41 between them.

[0148] After this, a procedure is performed for finishing the joints 27. During this finishing. procedure, as shown in FIG. 19, ring shaped packings 42 may be inserted into the joint portions 27, and then the non-shrink mortar may be injected from the injection tubes 26 into their interiors so as to fill them up; or, alternatively, mortar may be heaped up in advance and spread out, and then, after having performed the mating together of the balustrades 40 (or 5) and the connecting blocks 41, processing may be performed upon the spread out mortar which has been squeezed out; or, again, mortar may be piled up upon the sills inside the packings 42, and this spread out mortar may be prevented by the packings 42 from being squeezed out to the outside when the balustrades 40 (or 5) and the connecting blocks 41 are connected together.

[0149] It should be understood that, as shown in FIG. 20, the connecting blocks 41 may formed roughly in the shape of square cones or prisms; or alternatively, as shown in FIG. 21, it is also possible to provide the benefit of providing a decorative design by attaching rounded portions to the side portions of the connecting blocks 41.

[0150] A variation of the above described second preferred embodiment of the present invention will now be explained with reference to FIGS. 22 through 25.

[0151] With this embodiment, through holes 44 are formed in the connecting blocks 43 so as to extend in the vertical direction, and the main reinforcement bars 23 which are provided to the lower balustrade 40 (or 5) project upwards from the upper edge of this balustrade 40 (5) by a relatively longer than in the previous embodiment described and illustrated above, i.e. longer than the height corresponding to that of the connecting blocks 43. Furthermore, the metallic sleeves 25 are embedded in the lower end portions of the joining wall portions 22 of the upper balustrade 40.

[0152] The connection together of the upper and lower balustrades 40 (or 5) and the connecting blocks 43 is performed, in this variant embodiment of the present invention, by the following procedure.

[0153] First, as shown in FIG. 24, the connecting blocks 43 are set up upon the lower balustrade 40 (or 5) while passing the main reinforcement bars 23 which project from the lower balustrade 40 through their through holes 44 from below. Furthermore, spread mortar is heaped up upon the lower balustrade 40 at its portions where it mates together with the connecting blocks 43.

[0154] At this time, in the state in which the connecting blocks 43 are thus positioned upon the lower balustrade 40 (or 5), the main reinforcement bars 23 which project upwards from the upper portion of the lower balustrade 40 are passing through the holes in the connecting blocks 43 and are projecting upwards from these connecting blocks 43. And, according to requirements, mortar is poured into the through holes 44 in the connecting blocks 43, so as to fill up the gaps between these through holes 4 and the main reinforcement bars 23.

[0155] Next, as shown in FIG. 25, the upper balustrade 40 is set up upon the connecting blocks 43 while inserting the main reinforcement bars 23 which are projecting upwards from the connecting blocks 23 into the metallic sleeves 25 which are fitted in the lower edge portion of said upper balustrade 40. Furthermore, according to requirements, the connecting blocks 43 and the upper balustrade 40 may be mated together after mortar has been piled up and spread out upon the upper surface of the connecting blocks 43, which are the elements which are positioned below the upper balustrade 40, before erecting this upper balustrade 40 in the above described manner.

[0156] Furthermore, as shown by the arrow sign in FIG. 25, the upper and lower balustrades 40 and the connecting blocks 43 are mutually connected together by the high strength non-shrink mortar being injected through the lower ones of the injection tubes 26 into the metallic sleeves 25 and hardening therein.

[0157] With the previously described connecting blocks 41 in which the metallic sleeves 25 were embedded, their heights were limited by the heights of the metallic sleeves 25 due to problems during construction. In contrast, in this embodiment, by employing a structure as shown in FIG. 25, there is the beneficial aspect that the restriction due to the metallic sleeves 25 disappears, and the freedom by which the height may be set is increased.

[0158] Next, FIGS. 26 through 28 are examples of a method of construction for one of the connecting blocks 43 shown in FIG. 22.

[0159] With this constructional method, a tubular block 45 whose cross sectional shape is rectangular is used; this tubular block 45 is set upon a base plate X, metallic pipes 46 are set in predetermined positions within this tubular block 45, and concrete 47 is poured in between these metallic pipes 46 and the tubular block 45, so that thereby the metallic pipes 46 and the tubular block 45 are fixed together into one unit.

[0160] As a variation upon this type of constructional method for the connecting blocks 43, it is possible to employ a structure that the metallic pipes 46 can be removed. In this structure, connecting blocks which are only made of concrete, as shown in FIG. 22, can be obtained.

[0161] FIGS. 29 and 30 show a third preferred embodiment of the present invention.

[0162] The balustrade 50 of this third preferred embodiment of the present invention is the same as the balustrades 20, 40 shown above with reference to the above described preferred embodiments, except for the fact that the blind portion 21 is improved in the aspect that, as shown in FIG. 29, an opening 51 is formed in the central portion of this blind portion 21, and, within this opening 51, as shown in FIG. 30, there is fitted a grating 52 which is made of aluminum alloy or a composite resin material.

[0163] The grating 52 may be fitted within the opening 51 by any of various methods, such as by fitting it after the main portion of the balustrade 50 has been made using a fixing tool, or alternatively by setting it in the shuttering which is used for making the main portion of the balustrade 50 so that it is connected into one unit with the blind portion 21 when the concrete is poured into this shuttering, or the like.

[0164] The balustrade 50 according to this third preferred embodiment of the present invention is one which has been improved based upon the objective of aiming to make the blind portion 21 lighter, since it is a portion in which the weight is concentrated, and based upon the objective of making the opening area of the balustrade portion larger so as to enlarge the field of view from the passageway D or the verandah E, and based upon the objective of improving the quality of the lighting which is admitted to the building, or the like.

[0165] Furthermore, FIG. 31 shows a fourth preferred embodiment of the present invention.

[0166] The balustrade of this fourth preferred embodiment of the present invention, which is designated in the figures by the reference symbol 60, is one in which the positional relationship of the blind portions 41 and the joining wall portions 22 is vertically reversed.

[0167] By adopting this type of structure, the portions in which the weight is concentrated are shifted downwards, so that it is possible to enhance the safety of this balustrade 60.

[0168] It should be understood that, with the various preferred embodiments described above, the actual forms in which the various structural elements are implemented, and their dimensions, are only shown by way of example, and it would be possible to make various changes and alterations, as appropriate based upon design requirements.

[0169] For example although, in the various above described preferred embodiments of the present invention, the use of the wires 31 as prevention members for preventing the balustrades 20 leaning over and falling during the pouring of the concrete for the floor slabs is shown by way of example, instead of this arrangement, it would also be possible, as shown in FIG. 32, to perform the task of supporting the balustrades 20 by connecting connection reinforcing bars 29 which are provided so as to project to the inward sides of the balustrades 20 to reinforcing bars 70 for the floor slab S which have been assembled to the floor slab shuttering 3 by spot welding or the like.

[0170] Furthermore, as shown in FIGS. 12 and 13, it would also be possible, after having erected the balustrades 20, to fit protective nets N to the inner sides of these balustrades 20, so as to cover over the space between the various joining wall portions 22 which constitute open portions. These protective nets N may be fitted to the inner sides of the balustrades 20 by various fixing methods, such as by hooks, or by ropes which are threaded through slits 24 positioned below in the balustrade 20, or the like.

[0171] The openings in the balustrades 20 are reduced to the utmost extent possible by providing these protective nets N, so that it is possible to enhance the safety of the workplace by yet a further level.

Claims

1. A construction method of multi floor building which comprises floor slabs which define each floor of the multi floor building, and non load bearing walls made from pre-cast concrete which are erected upon edge portions of the floor slabs,

wherein said non load bearing walls are formed of a height which is roughly equal to a height of each floor of said multi floor building, and, after having erected said non load bearing wall for an upper floor upon said non lead bearing wall which has been erected upon the floor slab for a lower floor, a floor slab shuttering for the upper floor is built at an inner side of said non load bearing wall for the upper floor and at a partway in the vertical direction of said non load bearing wall for the upper floor, with said non load bearing wall serving as a portion of the shuttering, and concrete is poured within said floor slab shuttering so as to construct the floor slab for the upper floor of the building.

2. A construction method of multi floor building as described in claim 1, wherein a load bearing walls are erected upon said floor slab for the lower floor so as to define rooms upon the lower floor, before erecting said non load bearing wall for the upper floor.

3. A construction method of multi floor building as described in claim 1, wherein connection reinforcing bars which project into said floor slab shuttering for the upper floor are provided to said non load bearing wall for the upper floor, and said non load bearing wall for the upper floor and said floor slab for the upper floor are joined together by embedding these connection reinforcing bars in the concrete which is poured into said floor slab shuttering for the upper floor.

4. A construction method of multi floor building as described in claim 1, wherein, at a joining portion between the upper and lower non load bearing walls, a metallic sleeve which extends along a direction of their mutual connection is ambedded within either one of these non load bearing walls, and a connection reinforcing bar which is inserted into said metallic sleeve is projected into the other one of these non load bearing walls; and wherein the upper and lower non load bearing walls are connected together by, after having inserted the connection reinforcing bar into said metallic sleeve, filling grouting material into the metallic sleeve and allowing it to harden.

5. A construction method of multi floor building as described in claim 1, wherein, said non load bearing wall for the upper floor which constitutes a portion of said floor slab shuttering for the upper floor is connected to a structural element which is positioned on an inner side thereof, before pouring concrete into said floor slab shuttering for the upper floor.

6. A construction method of multi floor building as described in claim 5, wherein said structural element is said floor slab for the lower floor.

7. A construction method of multi floor building as described in claim 5, wherein said structural element is a load bearing wall which is erected upon said floor slab for the lower floor.

8. A construction method of multi floor building as described in claim 1, wherein said non load bearing wall is a balustrade.

9. A non load bearing wall of multi floor building; wherein the non load bearing wall is made from pre-cast concrete and is erected at an outer edge portion of a floor slab of said multi floor building; and wherein the non load bearing has a height roughly equal to the height of each floor of said multi floor building, a floor slab shuttering for the corresponding floor is built at the inner side of said non load bearing wall and at a partway in the vertical direction of said non load bearing wall, and said non load bearing wall constitutes a portion of said floor slab shuttering.

10. A non load bearing wall of multi floor building as described in claim 9, wherein a blind portion which hides the upper portion of the outer edge portion of said floor slab, projects at least upward from said floor slab at the portion where said floor slab shuttering for the corresponding floor.

11. A non load bearing wall of multi floor building as described in claim 10, wherein joining wall portions which extend in the downward direction of said floor slab are formed at the lower portions of both the ends in widthwise direction of said blind portion.

12. A non load bearing wall of multi floor building as described in claim 10, wherein joining wall portions which extend in the upward direction from said blind portions are formed at the upper portions of both the ends in the widthwise direction of said blind portion.

joining wall portions which extend in the upward direction from said blind portions are formed at the upper portions of both the ends in the widthwise direction of said blind portion.

13. A non load bearing wall of multi floor building as described in claim 11, wherein a connecting block for joining together the upper and lower non load bearing walls is provided by dividing each of said joining wall portions in the vertical direction.

14. A non load bearing wall of multi floor building as described in claim 12, wherein a connecting block for joining together the upper and lower non load bearing walls is provided by dividing each of said joining wall portions in the vertical direction.

15. A non load bearing wall of multi floor building as described in claim 9, wherein said non load bearing wall is a balustrade.