Modular room unit, construction system and method for installing a modular room unit

Abstract

The invention relates to a construction system (100) comprises a floor (7), a load bearing structure (8) of a building and a modular room unit (1). The floor (7) comprises a first floor element (71), a second floor element (72) and a base slab (2) of the modular room unit (1). The modular room unit (1) comprises a first slab support element (31) and a first side support element (32). The first side support element (32) is arranged to transfer loads from the base slab (2) to the first floor element (71), and the first slab support element (31) is arranged to provide a support for the second floor element (72). The invention further relates to a modular room unit (1) and a method for installing a modular room unit (1).

Description

[0001] MODULAR ROOM UNIT, CONSTRUCTION SYSTEM AND METHOD FOR INSTALLING A

[0002] MODULAR ROOM UNIT

[0003] FIELD OF THE INVENTION

[0004] The present invention relates to a modular room unit and more particularly to a modular room unit according to preamble of claim 1. The present invention further relates to a construction system and more particularly to a construction system according to preamble of claim 11. The present invention further relates to a method for installing a modular room unit and more particularly to a method for installing a modular room unit according to preamble of claim 16.

[0005] BACKGROUND OF THE INVENTION

[0006] Modular room units are commonly known pre-manufactured modules which maybe assembled and installed as separate ready-made units into buildings. The modular room unit may be for example bathroom modules or kitchen modules or the like room modules defining a room space. The modular room units comprise a base slab for providing a floor structure for the modular room unit. The modular room unit further comprises walls which are supported to the base slab. The walls define the room space or room spaces of the modular room unit. The modular room unit may also comprise top structure for providing a ceiling structure for the modular room unit. The modular room unit is separate unit or entity which maybe installed into a building such that it defines a room space in the building.

[0007] The walls of the modular room unit may be formed as wall units or wall elements which are pre-manufactured elements. These wall units are supported to the base slab or on the base slab and secured to the base slab. The base slab may be a concrete slab made for the modular room unit.

[0008] The modular room units are typically pre-manufactured wet rooms or spaces such as bathrooms, toilets, or the like. These modular rooms comprise a waterproofing in the floor structure and in the walls for preventing moisture entering the structures of the modular room unit.

[0009] In the prior art the modular room units are usually supported on an intermediate floor of the building. Thus, the base slap of the modular room unit is supported on the intermediate floor as separate surface structure.

[0010] The disadvantage with the above mentioned prior art installation systems is that the intermediate floor of the building needs to be provided additional through holes for pipe and electrical installations for the modular room unit. These additional through holes needs to be sealed which generates additional work.

[0011] In some other prior art systems, the modular room units may be stacked so that an upper modular room unit is supported on a lower modular room unit.

[0012] One of the problems associated with the stacked modular room units is that floors of modular room units are at a different level than floors of the building due to tolerances of construction work.

[0013] In the prior art is known to construct a floor supported to load bearing structures of a building, the floor having an opening for the modular room unit and the modular room unit is supported to the floor. This means that the floor having an opening. One of the problems associated with the prior art solution is that it is complicate to construct the floor having an opening from floor elements as all the floor elements do not have a support due to the opening.

[0014] BRIEF DESCRIPTION OF THE INVENTION

[0015] An object of the present invention is to provide such that the disadvantages of the prior art are solved or at least alleviated.

[0016] The objects of the invention are achieved by a modular room unit which is characterized by what is stated in the independent claim 1. The objects of the present invention are further achieved with a construction system which is characterized by what is stated in the independent claim 11. The objects of the present invention are further achieved with method for installing a modular room unit which is characterized by what is stated in the independent claim 16.

[0017] The preferred embodiments of the invention are disclosed in the dependent claims.

[0018] The invention is based on the idea of providing a modular room unit. The modular room unit comprises a base slab, the base slab having a first edge, a second edge, a third edge and a fourth edge, the third edge extending between the first edge and the second edge, and the fourth edge is provided opposite to the third edge. The modular room unit comprises wall elements defining a room space of the modular room unit. The modular room unit comprises a first slab support element arranged in connection with the third edge and arranged to extend in a direction away from the base slab in a direction between the third edge and the fourth edge of the base slab. The modular room unit comprises a first side support element provided in connection with the base slab and arranged to extend away from the base slab in a direction between the third edge and the fourth edge of the base slab.

[0019] In some embodiments, the first slab support element comprises a distal edge arranged at a first distance from the third edge of the base slab and a proximal edge provided in connection with the third edge of the base slab, and the first slab support element is arranged to extend in a direction between the third edge and the fourth edge of the base slab. The first side support element comprises a distal edge arranged at a second distance from the first edge of the base slab and a proximal edge provided in connection with the base slab, and the first side support element is arranged to extend in a direction between the first edge and the second edge of base slab.

[0020] The first slab support element is provided in connection with the third edge of the base slab. The first side support element is provided in connection with the first edge of the base slab.

[0021] The base slab has a lower surface and an upper surface. The first slab support element and the first side support element are arranged to extend away from the base slab parallel or substantially parallel with the upper and / or lower surface of the base slab.

[0022] In some embodiments, the modular room unit comprises a first support part, and the first slab support element and the first side support element are provided to the first support part.

[0023] The first support part provides a simple structure as it comprises both the first slab support element and the first side support element.

[0024] In some other embodiments, the modular room unit comprises a first support part, and the first slab support element is provided to the first support part, and the first support part having a first end and a second end, the first side support element is provided to the first end of the first support part, and the first support part comprises a second side support element provided to the second end of the first support part.

[0025] The second side support element enables supporting the modular room to between a floor element and a side of wall or between two floor elements.

[0026] In yet some other embodiments, the modular room unit comprises a first support part, and the first slab support element is provided to the first support part, and the first support part having a first end and a second end, the first side support element is provided to the first end of the first support part, and the first support part comprises a second side support element, the second side support element is provided to the second end of the first support part, and the second side support element corresponding the first side support element.

[0027] The first support part provides a simple structure as it comprises both the first slab support element and the first side support element, and the second side support element enables supporting the modular room between two floor elements.

[0028] According to the above mentioned, the first slab support element and the first side support element may be provided as a single part of as an integral support structure in the first support part.

[0029] Further in some embodiments, the first slab support element, the first side support element and the second side support element are provided as a single part of as an integral support structure in the first support part. In some embodiments, the base slab having an upper surface and a lower surface, the first side support element is arranged above the upper surface of the base slab.

[0030] This means that a floor element may be provided to extend at same level.

[0031] In some embodiments, the modular room unit comprises the first slab support element and the first side support element, and the first slab support element and the first side support element are provided as separate elements.

[0032] In some other embodiments, the modular room unit comprises a second side support element, the second side support element being provided in connection with the second edge of the base slab, and the second side support element is arranged to extend away from the base slab in a direction between the first edge and the second edge of base slab, the first side support element being provided in connection with the first edge of the base slab, and the modular room unit comprises the first slab support element, the first side support element and the second side support element, and the first slab support element, the first side support element and the second side support element are provided as separate elements.

[0033] In some embodiments, the base slab comprises an upper surface and a lower surface, and the first side support element is arranged above the lower surface of the base slab and the first slab support element is arranged at the level of the lower surface of the base slab or below the lower surface of the base slab.

[0034] In some other embodiments, the first side support element and the second side support element are arranged above the lower surface of the base slab and the first slab support element is arranged at the level of the lower surface of the base slab or below the lower surface of the base slab.

[0035] In some embodiments, the base slab having an upper surface and a lower surface, the first side support element is arranged to the vicinity of the upper surface of the base slab.

[0036] This means that floor elements may be provided to extend at same level.

[0037] In some embodiments, the first side support element is arranged above the first slab support element.

[0038] This means that floor elements may be provided to extend at the same level.

[0039] In some embodiments, the base slab having an upper surface and a lower surface, the first side support element is arranged to the vicinity of the upper surface of the base slab, and the first side support element is arranged above the first slab support element.

[0040] This means that the first floor element and the second floor element may extend at the same level.

[0041] In some embodiments, the base slab having an upper surface and a lower surface, the proximal edge of the first side support element is arranged to the vicinity the upper surface of the base slab or in connection with the upper surface of the base slab, and the proximal edge of the first slab support element is arranged to the vicinity the lower surface of the base slab or in connection with the lower surface of the base slab.

[0042] This means that the first floor element, and the second floor element may extend at the same level.

[0043] In some embodiments, the proximal edge of the first side support element is provided in connection with the first edge of the base slab or in connection with the third edge of the base slab.

[0044] This means that the first side support element provides a support for the modular room unit.

[0045] In some embodiments, the first side support element extending in a direction between the first end and the second end of the first support part.

[0046] In some embodiments, the first side support element is arranged to be rested on a floor element beside the modular room unit.

[0047] This enables fast and simple manner to support the modular room unit on the floor element beside the modular room unit. In some embodiments, the first side support element comprises a steel plate extending in a direction between the first end and the second end of the first support part, and the first side support element is arranged to be rested on a floor element beside the first support part.

[0048] This enables fast and simple manner to support the modular room unit on a floor element.

[0049] In some embodiments, the first support part comprises a second side support element, the second side support element corresponding to the first side support element.

[0050] In some embodiments, the first support part comprises a second side support element arranged to be supported to a load bearing structure of a building.

[0051] This enables supporting the modular room between two floor elements.

[0052] In some embodiments, the first support part comprises a first connecting element arranged to connect the first slab support element and the first side support element.

[0053] This increases strength of the first support part.

[0054] In some embodiments, the first support part comprises a first connecting element arranged to connect the first slab support element and the first side support element, the first support part comprises a first edge connecting element arranged to connect the first support part to the base slab.

[0055] This provides a strong connection between the first support part and the base slab.

[0056] In some embodiments, the first support part comprises a first edge connecting element arranged to connect the first support part to the base slab.

[0057] In some embodiments, the first support part comprises a first connecting element arranged to connect the first slab support element and the first side support element, the first support part comprises a first edge connecting element fixed to base slab, and the first edge connecting element is connected to the first slab support element and to the first connecting element.

[0058] This provides a strong connection between the first support part and the base slab and these further increases strength of the first support part.

[0059] In some embodiments, the modular room unit comprises one or more lead-throughs provided to the base slab, the one or more lead-throughs are arranged to extend through the base slab from the upper surface to the lower surface. This increases efficiency of construction work as pipes can be supported with the base slab.

[0060] In some other embodiments, the modular room unit comprises one or more lead-throughs provided to the base slab, the one or more lead-throughs are arranged to extend through the base slab, and the one or more lead-throughs comprise fire protection elements in connection with the base slab.

[0061] This increases efficiency of construction work as pipes are supported with the base slab and fire fixing includes fire proofing.

[0062] In some embodiments, the base slab is made of concrete and the first support part is made of steel.

[0063] The concrete slab transfers loads in several directions, and the first support part made of steel is light but still strong.

[0064] In some other embodiments, the base slab is made of concrete, the first support part is made of steel and the wall elements comprises panels made of sheet.

[0065] The wall elements comprise panels made of sheet are light which eases lifting and transport of the modular room unit.

[0066] In yet some embodiments, the base slab is made of concrete, the first support part is made of steel and the wall elements are made of thin metal sheets.

[0067] In some embodiments, the first support part is made of concrete, and the first slab support element and the first side support element are made of steel.

[0068] The wall elements are made of thin metal sheets are light which eases lifting and transport of the modular room unit.

[0069] The present invention further relates to a construction system. The construction system comprises a floor, a load bearing structure of a building and a modular room unit; and the floor comprises a first floor element, a second floor element and a base slab of the modular room unit. The base slab of the modular room unit having a first edge, a second edge, a third edge and a fourth edge; the third edge is arranged to extend between the first edge and the second edge, and the fourth edge is provided opposite to the third edge; the modular room unit further comprises wall elements defining a room space of the modular room unit, the modular room unit comprises a first slab support element provided in connection with the third edge; the first slab support element is arranged to extend away from the base slab in a direction between the third edge and the fourth edge of the base slab; the modular room unit comprises a first side support element, and the first side support element is arranged to extend away from the base slab in a direction between the first edge and the second edge of base slab. The base slab is arranged to transfer loads from the wall elements to the first side support element. The first floor element is supported to the load bearing structure of a building. The first side support element is supported to the first floor element and the first side support element is arranged to transfer loads from the base slab to the first floor element, and the first slab support element is arranged to provide a support for the second floor element.

[0070] In some embodiments, the first slab support element comprises a distal edge arranged at a first distance from the third edge of the base slab and a proximal edge provided in connection with the base slab, and the first side support element comprises a distal edge arranged at a second distance from the first edge of the base slab and a proximal edge provided in connection with the base slab.

[0071] The first slab support element is provided in connection with the third edge of the base slab. The first side support element is provided in connection with the first edge of the base slab.

[0072] The base slab has a lower surface and an upper surface. The first slab support element and the first side support element are arranged to extend away from the base slab parallel or substantially parallel with the upper and / or lower surface of the base slab.

[0073] In some embodiments, the floor comprises a third floor element supported to the load bearing structure of the building, the base slab of the modular room unit is arranged to extend between the third floor element and the first floor element, the base slab comprises a second side support element and arranged to extend away from the base lab in direction between the third edge and the fourth edge and opposite to the direction of the first side support element, the second side support element corresponding to the first side support element, and the second side support element is supported to the third floor element and the second side support element is arranged to transfer loads from the base slab to the third floor element.

[0074] In some embodiments, the modular room unit comprises the first slab support element and the first side support element, and the first slab support element and the first side support element are provided as separate elements.

[0075] In some other embodiments, the first slab support element and the first side support element are provided as integral support part.

[0076] In some further embodiments, the modular room unit comprises a second side support element, the second side support element being provided in connection with the second edge of the base slab, and the second side support element is arranged to extend away from the base slab in a direction between the first edge and the second edge of base slab, the first side support element being provided in connection with the first edge of the base slab, and the modular room unit comprises the first slab support element, the first side support element and the second side support element, and the first slab support element, the first side support element and the second side support element are provided as separate elements.

[0077] In some yet other embodiments, the first slab support element, the first side support element and the second side support element are provided as integral support part.

[0078] The first slab support element and the first side support element, or the first slab support element, the first side support element and the second side support element are configured to form a first support part.

[0079] In some embodiments, the base slab comprises an upper surface and a lower surface, and the first side support element is arranged above the lower surface of the base slab and the first slab support element is arranged at the level of the lower surface of the base slab or below the lower surface of the base slab.

[0080] In some other embodiments, the first side support element and the second side support element are arranged above the lower surface of the base slab and the first slab support element is arranged at the level of the lower surface of the base slab or below the lower surface of the base slab. This provides a supported modular room unit between floor elements which means that a position of the modular room unit may be freely defined.

[0081] In some embodiments, modular room unit comprises a second support part, the second support part corresponding to the first support part, and the second support part is fixedly connected to the fourth edge of the base slab.

[0082] According to the above mentioned, a second slab support element and a third side support element may be provided as a single part of as an integral support structure in the second support part.

[0083] Further in some embodiments, the second slab support element, the third side support element and a fourth side support element are provided as a single part of as an integral support structure in the second support part.

[0084] This enables supporting floor elements both to the third edge and to the fourth edge. In some embodiments, the modular room unit comprises a second slab support element provided in connection with the third edge, the second slab support element is arranged to extend away from the base slab in a direction between the third edge and the fourth edge of the base slab; the modular room unit comprises a third side support element, the third side support element is arranged to extend away from the base slab in a direction between the first edge and the second edge of base slab.

[0085] In some other embodiments, the modular room unit comprises a comprises a second slab support element provided in connection with the third edge, the third slab support element is arranged to extend away from the base slab in a direction between the third edge and the fourth edge of the base slab; the modular room unit comprises a third side support element, the third side support element is arranged to extend away from the base slab in a direction between the first edge and the second edge of base slab; and the modular room unit comprises a fourth side support element, the fourth side support element is arranged to extend away from the base slab in a direction between the first edge and the second edge of base slab and opposite to the third side support element.

[0086] In some embodiments, the first floor element having an upper surface and a lower surface, the first side support element having a lower surface, the lower surface of the first side support element is arranged on the upper surface of the first floor element, the first slab support element having an upper surface, the second floor element having an upper surface and a lower surface, the lower surface of the second floor element is arranged on the upper surface of the first slab support element.

[0087] This enables providing the first slab, the first floor element and the second floor at the same level.

[0088] In some other embodiments, the first floor element having an upper surface and a lower surface, the first side support element having a lower surface, the lower surface of the first side support element is arranged on the upper surface of the first floor element, the first slab support element having an upper surface, the second floor element having an upper surface and a lower surface, the lower surface of the second floor element is arranged on the upper surface of the first slab support element, and the upper surface of the first floor element and the upper surface of the second floor element are arranged to extend at the same level.

[0089] This provides a floor so that the first floor element and the second floor extending at the same level. In yet some other embodiments, the first floor element having an upper surface and a lower surface, the first side support element having a lower surface, the lower surface of the first side support element is arranged to rest on the upper surface of the first floor element, the first slab support element having an upper surface, the second floor element having an upper surface and a lower surface, the lower surface of the second floor element is arranged to rest on the upper surface of the first slab support element, and the upper surface of the first floor element and the upper surface of the second floor element are arranged to extend at the same level.

[0090] This provides a floor so that the first floor element and the second floor extending at the same level.

[0091] In yet some other embodiments, the first floor element having an upper surface and a lower surface, the first side support element having a lower surface, the lower surface of the first side support element is arranged to rest on the upper surface of the first floor element, the first slab support element having an upper surface, the second floor element having an upper surface and a lower surface, the lower surface of the second floor element is arranged to rest on the upper surface of the first slab support element, and the upper surface of the first floor element and the upper surface of the second floor element are arranged to extend at the same level, the base slab having an upper surface and a lower surface, the proximal edge of the first side support element is arranged to the vicinity the upper surface of the base slab or in connection with the upper surface of the base slab, and the proximal edge of the first slab support element is arranged below the lower surface of the base slab.

[0092] This provides a floor so that the first floor element and the second floor extending at the same level and a lower surface of the base slab may be arranged above the lower surface of the first floor element and second floor element. This provides a lighter base slab.

[0093] In some embodiments, the construction system comprises a joint grouting in gaps between the supported first floor element, the supported second floor element and the base slab of the supported modular room unit.

[0094] The joint grouting fills the gaps between the floor elements and between the floor elements and the base slab. The joint grouting provides a uniform floor. Furthermore, the uniform floor provides fire and sound compartmentalization between adjacent storeys. The side edges or at least one of the side edges is provided with grooves or recesses for receiving the grouting material. The grooves or recesses are filled with the grouting material and provide dowel effect connecting and supporting the base slab of the modular floor unit to adjacent floor element.

[0095] In some embodiments, the modular room unit being any above disclosed embodiment of the modular room unit.

[0096] The present invention further relates to a method for installing a modular room unit. The method comprises steps: providing a load bearing structure of a building, a first floor element, a second floor element and a modular room unit, the modular room unit comprises a base slab, a first side support element and a first slab support element; supporting a first floor element to the load bearing structure to provide a supported first floor element; supporting the first side support element of the modular room unit to the supported first floor element to provide a supported modular room unit; and supporting a second floor element to a first slab support element of the supported modular room unit to provide a supported second floor element.

[0097] In some embodiments, method further comprises providing a uniform floor by casting a joint grouting into gaps between the supported first floor element, the supported second floor element and the base slab of the supported modular room unit.

[0098] The grouting fills the gaps between the floor elements and between the floor elements and the base slab and provides support for the floor elements. Furthermore, the uniform floor provides fire and sound compartmentalization between adjacent storeys.

[0099] In some embodiments, the construction system comprises a third floor element and the modular room unit comprises a second side support element ; and the method comprises supporting a third floor element to the load bearing structure to provide a supported third floor element and supporting the second side support element of the modular room unit to the supported third floor element, and providing a uniform floor by casting a joint grouting into gaps between the supported first floor element, the supported second floor element, the supported third floor element, and the base slab of the supported modular room unit.

[0100] The grouting fills the gaps between the floor elements and between the floor elements and the base slab and provides support for the floor elements. In some embodiments, the base slab having an upper surface and a lower surface, the proximal edge of the first side support element is arranged to the vicinity the upper surface of the base slab or in connection with the upper surface of the base slab, and the proximal edge of the first slab support element is arranged to the vicinity the lower surface of the base slab or in connection with the lower surface of the base slab.

[0101] In some other embodiments, the base slab having an upper surface and a lower surface, the proximal edge of the first side support element is arranged to the vicinity the upper surface of the base slab or in connection with the upper surface of the base slab, and the proximal edge of the first slab support element is arranged below the lower surface of the base slab.

[0102] This provides a floor so that the first floor element and the second floor extending at the same level and a lower surface of the base slab may be arranged above the lower surface of the first floor element and second floor element. This provides a lighter base slab.

[0103] In some embodiments, the method is carried out with any above disclosed embodiment of the modular room unit.

[0104] In some embodiments, the method being arranged to provide any above disclosed embodiment of the construction system.

[0105] An advantage of the invention is that modular room unit may be installed easily into an opening of a floor and the modular room unit provides a support for the floor elements having a longitudinal direction extending between the opening and a load bearing structure of the building. Furthermore, the present invention provides a method for installing a modular room unit and a construction system so that floor elements are supported to modular room unit.

[0106] BRIEF DESCRIPTION OF THE DRAWINGS

[0107] The invention is described in detail by means of specific embodiments with reference to the enclosed drawings, in which:

[0108] Figures 1, 3 and 5 show schematically a top view of different embodiments of a modular room unit according to the present invention;

[0109] Figures 2 and 4 show schematically a front view of different embodiments of a modular room unit according to the present invention;

[0110] Figures 6-8 show schematically a top view of different embodiments of a construction system according to the present invention; and Figure 9 shows schematically a front view of one embodiments of a construction system according to the present invention.

[0111] DETAILED DESCRIPTION OF THE INVENTION

[0112] Figure 1 shows schematically a top view of one embodiments of a modular room unit according to the present invention. Figure 2 shows schematically a front view of the modular room unit shown in figure 1.

[0113] The modular room unit 1 comprises a base slab 2, the base slab 2 having a first edge 21, a second edge 22, a third edge 23 and a fourth edge 24, the third edge 23 extending between the first edge 21 and the second edge 22, and the fourth edge 24 is provided opposite to the third edge 23. In other words, the first edge 21, the second edge 22, the third edge 23 and the fourth edge 24 defining the base slab 2. The third edge 23 and the fourth edge 24 extending between the first edge 21 and the second edge 22.

[0114] The modular room unit 1 comprises wall elements 10a, 10b, 10c, lOd defining a room space 50 of the modular room unit 1.

[0115] Typically, the modular room unit 1 further comprises a roof element lOe.

[0116] In certain embodiments, the wall elements 10a, 10b, 10c, lOd, the roof element lOe and the base slab 2 defining the room space 50.

[0117] The base slab 2 having an upper surface 25 and a lower surface 26.

[0118] The upper surface 25 of the base slab 2 is in some embodiments provided with one or more surface material layers forming the floor surface of the modular room unit 1.

[0119] In certain embodiments, the wall elements 10a, 10b, 10c, lOd are arranged to extend upwards from the upper surface 25 of the base slab 2.

[0120] The modular room unit 1 comprises a first slab support element 31, the first slab support element 31 having a distal edge 311 arranged at a first distance from the third edge 23 of the base slab 2 and a proximal edge 312 provided in connection with the third edge 23 of the base slab 2, and the first slab support element 31 is arranged to extend in a direction between the third edge 23 and the fourth edge 24 of the base slab 2.

[0121] In the context of this application, the proximal edge 312 provided in connection with the third edge 23 of the base slab 2 means that the proximal edge 312 provided is connected to the third edge 23 of the base slab 2 directly or via a first connection element.

[0122] The modular room unit 1 comprises a first side support element 32, the first side support element 32 having a distal edge 321 arranged at a second distance from the first edge 211 of the base slab 2 and a proximal edge 322 provided in connection with the base slab 2, and the first side support element 32 is arranged to extend in a direction between the first edge 21 and the second edge 22 of base slab 2.

[0123] In other words, the first side support element 32 is arranged to protrude from the base slab 2 in a direction away from the room space 50.

[0124] The first side support element 32 having a lower surface 324 and an upper surface 323. The lower surface 324 is opposite to the upper surface 323. The lower surface 324 and the upper surface 323 of first side support element 32 are arranged to extend horizontally.

[0125] In certain embodiments, the first side support element 32 is arranged above the upper surface 25 of the base slab 2.

[0126] In certain embodiments, the first side support element 32 is arranged on same level with the upper surface 25 of the base slab 2 or below the upper surface 25 of the base slab 2.

[0127] In certain embodiments, the first side support element 32 is arranged to protrude from the base slab 2 in a direction away from the room space 50 and the proximal edge 322 of the first side support element 32 is arranged in the vicinity of the upper surface 25 of the base slab 2.

[0128] In certain embodiments, the lower surface 324 of the first side support element 324 being parallel to the lower surface 26 of the base slab 2.

[0129] In certain embodiments, the first side support element 32 is arranged to the vicinity of the upper surface 25 of the base slab 2.

[0130] In certain embodiments, the first side support element 32 is arranged above the first slab support element 31.

[0131] The first slab support element 31 having an upper surface 313 and a lower surface 314.

[0132] In certain embodiments, the upper surface 313 of the first slab support element 31 being parallel to the lower surface 26 of the base slab 2.

[0133] In certain embodiments, the proximal edge 322 of the first side support element 32 is arranged to the vicinity the upper surface 25 of the base slab 2 or in connection with the upper surface 25 of the base slab 2, and the proximal edge 312 of the first slab support element 31 is arranged to the vicinity the lower surface 26 of the base slab 2 or in connection with the lower surface 26 of the base slab 2.

[0134] In certain embodiments, the upper surface 313 of the first slab support element 31 is arranged to extend at the same level with the lower surface 26 of the base slab 2 and the lower surface 324 of the first side support element 324 is arranged to extend at the same level with the lower surface 26 of the base slab 2.

[0135] When the modular room unit 1 is installed to the building the upper surface 313 of the first slab support element 31 is arranged at the same level with a lower surface of an adjacent floor element of the building.

[0136] In certain embodiments, the proximal edge 322 of the first side support element 32 is provided in connection with the first edge 21 of the base slab 2 or in connection with the third edge 23 of the base slab 2.

[0137] In other words, the first side support element 32 may protrude from the first edge 21 in a direction away from the base slab 2; or the proximal edge 322 of the first side support element 32 extending in direction between the first edge 21 and the second edge 22 of the base slab 2 and or the proximal edge 322 of the first side support element 32 is connected to the first edge 21 of the base slab 2 as shown in figure 3.

[0138] In certain embodiments, the modular room unit 1 comprises an installation support element 35 arranged to be mounted to a wall or a beam of a load bearing structure. The installation support element 35 may comprise for instance a steel tube arranged to be supported inside a steel tube provided to the load bearing structure.

[0139] One or more installation support elements 35 may be provided to one or more of the edges 21, 22, 23, 24 of the base slab. These installation support elements are utilized during installation of the modular room unit 1 for supporting the modular room unit 1 on the wall structures of the building.

[0140] The installation support element 35 is shown in figures 1 and 2.

[0141] In certain embodiments, the modular room unit 1 comprises a second side support element 36 corresponding the first side support element 32.

[0142] In certain embodiments, the modular room unit 1 comprises a second side support element 36 and third side support element 38, the second side support element 36 and the third side support element 38 corresponding the first side support element 32.

[0143] In certain embodiments, the modular room unit 1 comprises a second side support element 36, a third side support element 38 and a fourth side support element 39, the second side support element 36, the third side support element 38 and the fourth side support element 29 corresponding the first side support element 32.

[0144] In certain embodiments, the first side support element 32 and the second side support element 36 are arranged in the vicinity of the third edge 23 of the base slab 2.

[0145] In certain embodiments, the third side support element 38 is arranged in the vicinity of the fourth edge 24 of the base slab 2.

[0146] In certain embodiments, the fourth side support element 39 is arranged in the vicinity of the fourth edge 24 of the base slab 2.

[0147] In certain embodiments, the modular room unit 1 comprises a second side support element 36 provided to the second edge 22 of the base slab 2. The second side support element 36 is arranged to protrude from the base slab 2 in a direction away from the first edge 21 of the base slab 2. or the second side support element 36 comprises a recess provided to the second edge 22 of the base slab 2.

[0148] In certain embodiments, the modular room unit 1 comprises a second side support element 36, a third side support element 38 and a fourth side support element 39; the third side support element 38 and the fourth side support element 29 corresponding the second side support element 36.

[0149] Figure 3 shows schematically a top view of one embodiments of a modular room unit according to the present invention. A front view of a first support part is shown in figure 4.

[0150] In this embodiment, the modular room unit 1 comprises a first support part 3. The first side support element 32 extending in a direction between the first end 301 and the second end 302 of the first support part 3.

[0151] The first slab support element 31 and the first side support element 32 are provided to the first support part 3.

[0152] In certain embodiments, the first support part 3 having a first end 301 and a second end 302, the first side support element 32 is provided to the first end 301 of the first support part 3 as shown in figure 4.

[0153] In certain embodiments, the first support part 3 having a first end 301 and a second end 302, the first side support element 32 is provided to the first end 301 of the first support part 3, and the first support part 3 comprises a second side support element 36 provided to the second end 302 of the first support part 3.

[0154] In certain embodiments, the second side support element 36 corresponding the first side support element 32. In certain embodiments, the first side support element 32 is arranged to be rested on a floor element beside the modular room unit 1.

[0155] In certain embodiments, the first side support element 32 comprises a steel plate extending in a direction between the first end 301 and the second end 302 of the first support part 3, and the first side support element 32 is arranged to be rested on a floor element beside the first support part 3.

[0156] In certain embodiments, the first support part 3 comprises a first connecting element 33 arranged to connect the first slab support element 31 and the first side support element 32.

[0157] In certain embodiments, the first support part 3 comprises a second connecting element 37 arranged to connect the first slab support element 31 and the second side support element 36.

[0158] In some embodiments, the first slab support element 31 and the first side support element 32 maybe provided as a single part of as an integral support structure in the first support part 3.

[0159] Further in some further embodiments, the first slab support element 31, the first side support element 32 and the second side support element 36 are provided as a single part of as an integral support structure in the first support part 3.

[0160] In certain embodiments, the first support part 3 comprises a first edge connecting element 34 arranged to connect the first support part 3 to the base slab 2.

[0161] In certain embodiments, the first edge connecting element 34 is fixedly connected to the first slab support element 31 and to the first connecting element 33.

[0162] In certain embodiments, the first support part 3 comprises steel studs arranged to extend inside the base slab 2.

[0163] In certain embodiments, the first edge connecting element 34 is fixedly connected to the first slab support element 31 and to the base slab 2.

[0164] In certain embodiments, the first edge connecting element 34 is fixed to the first connecting element 33, the second connecting element 37 and the first slab support element 31 and the first edge connecting element 34 is fixed to the base slab 2.

[0165] Figure 5 shows schematically a top view of one embodiments of a modular room unit according to the present invention the modular room unit 1 comprises a pipe arrangement 6 mounted to the base slab 2, the pipe arrangement 6 is arranged to extend in an upright position through the base slab 2.

[0166] In the context of this application, the upright position means that the pipe arrangement has a first end and a second end, the pipe arrangement is arranged to extend between the first end and the second end, the pipe arrangement has a longitudinal axis extending in direction between the first end and the second end, and angle between the vertical direction and the longitudinal axis is between 80 and 100 degrees.

[0167] The pipe arrangement 6 is arranged to extend in an upright position through the base slab 2, and the pipe arrangement 6 comprises a fire protection element 61 in connection with the base slab 2.

[0168] The pipe arrangement 6 may comprise any combination of the following: one or more water pipe, one or more electric cables, one or more cables, one or more heating pipes, one or more communication cables, and one or more wastewater pipes.

[0169] In certain embodiments shown in figures 1-5, the base slab 2 is made of concrete and the first support part 3 is made of steel.

[0170] In certain embodiments shown in figures 1-5, the wall elements 10a, 10b, 10c, lOd comprises panels made of sheet, or the wall elements 10a, 10b, 10c, lOd are made of thin metal sheets.

[0171] In certain embodiments shown in figures 1-5, the wall elements 10a, 10b, 10c, lOd comprises panels made of a construction board, preferably from water resistant construction board. Typically, a construction board may be gypsum board.

[0172] Figure 6 show schematically a top view of one embodiments of a construction system according to the present invention. Figure 9 shows a front view of the embodiment shown in figure 6.

[0173] The construction system 100 comprises a floor 7, a load bearing structure 8 of a building and a modular room unit 1; and the floor 7 comprises a first floor element 71, a second floor element 72 and a base slab 2 of the modular room unit 1.

[0174] In the context of this application, the load bearing structure 8 comprises any combination of the following: load bearing walls, load bearing beams and load bearing columns. The load bearing structure is arranged to transfer load from the floor 7 to a foundation of the building. The floor 7 is arranged to provide fire and sound compartmentalization between adjacent storeys.

[0175] The modular room unit 1 may be any above disclosed embodiment of the modular room unit 1.

[0176] The base slab 2 is arranged to transfer weight of the wall elements 10a, 10b, 10c, lOd of the modular room unit 1 to the first side support element 32.

[0177] The base slab 2 is arranged to transfer weights and loads occurring during use of the modular room unit 1, such as loads of furniture and persons, to the first side support element 32.

[0178] The first floor element 71 is supported to the load bearing structure 8 of a building. The first side support element 32 is supported to the first floor element 71 and the first side support element 32 is arranged to transfer loads from the base slab 2 to the first floor element 71.

[0179] The first slab support element 31 is arranged to provide a support for the second floor element 72. This means that, the second floor element 72 extending from the first slab support element 31 to the load bearing structure 8, and the second floor element is supported to the first slab support element 31 and to load bearing structure 8.

[0180] In certain embodiments, the fourth edge 24 and the second edge 22 of the base slab 2 maybe supported on the load bearing structure 8 as shown in figure 6.

[0181] In certain embodiments, the modular room unit 1 comprises the second side support element 36 supported on the load bearing structure 8.

[0182] In certain embodiment, the modular room unit 1 may comprise any combination the following: the second side support element 36, the third side support element 38 and a fourth side support element 39.

[0183] In certain embodiment, the modular room unit 1 may comprise the second side support element 36, the third side support element 38 and the fourth side support element 39. The third side support element 38 and the fourth side support element 39 correspond to the second side support element 36. The third side support element 38 and the fourth side support element 39 are arranged to provide a support for the fourth edge 24 of the base slab 2.

[0184] In certain embodiment, the modular room unit 1 may comprise any combination the following: the second side support element 36, the third side support element 38 and a fourth side support element 39. The third side support element 38 and a fourth side support element 39 are arranged to the fourth edge 24.

[0185] In certain embodiments, the modular room unit 1 comprises a second side support element 36, a third side support element 38 and a fourth side support element 39, the second side support element 36, the third side support element 38 and the fourth side support element 29 corresponding the first side support element 32.

[0186] In certain embodiments, the first side support element 32 and the second side support element 36 are arranged in the vicinity of the third edge 23 of the base slab 2.

[0187] In certain embodiments, the third side support element 38 is arranged in the vicinity of the fourth edge 24 of the base slab 2.

[0188] In certain embodiments, the fourth side support element 39 is arranged in the vicinity of the fourth edge 24 of the base slab 2.

[0189] In certain embodiments, the modular room unit 1 comprises a second side support element 36 provided to the second edge 22 of the base slab 2. The second side support element 36 is arranged to protrude from the base slab 2 in a direction away from the first edge 21 of the base slab 2 or the second side support element 36 comprises a recess provided to the second edge 22 of the base slab 2.

[0190] In certain embodiments, the modular room unit 1 comprises a second side support element 36, a third side support element 38 and a fourth side support element 39, the third side support element 38 and the fourth side support element 29 corresponding the second side support element 36.

[0191] In certain embodiments, the first floor element 71 having an upper surface 711 and a lower surface 712, the first side support element 32 having a lower surface 324, the lower surface 324 of the first side support element 32 is arranged on the upper surface 711 of the first floor element 71, the first slab support element 31 having an upper surface 313, the second floor element 72 having an upper surface 721 and a lower surface 722, the lower surface 722 of the second floor element 72 is arranged on the upper surface 313 of the first slab support element 31, and the upper surface 711 of the first floor element 71 and the upper surface 721 of the second floor element 71 are arranged to extend at the same level.

[0192] The upper surface 711 is opposite to the lower surface 712.

[0193] A distance between the upper surface and the lower surface defines a thickness of the first floor element 71. A distance between the upper surface and the lower surface defines a thickness of the second floor element 72.

[0194] A distance between the upper surface and the lower surface defines a thickness of the base slab 2.

[0195] In certain embo diments, the thickness of the first floor element 71 being equal to the thickness of the second floor element 72.

[0196] In certain embo diments, the thickness of the first floor element 71 being equal to the thickness of the second floor element 72 and the thickness of the base slab 2 being between 0,3 to 0,8 times the thickness of the first floor element 71.

[0197] The thickness of the base slab 2 is at least 200mm, preferably at least 230 mm and more preferably at least 260 mm.

[0198] The greater thickness, for example at least 260 mm, enables provided necessary reinforcements to the base slab 2 and for providing adequate soundproofing and fireproofing.

[0199] Thickness of the floor elements 71, 72 is typically between 300 to 400 mm.

[0200] In certain embodiments, the lower surface 324 of the first side support element 32 is arranged to rest on the upper surface 711 of the first floor element 71, and the lower surface 722 of the second floor element 72 is arranged to rest on the upper surface 313 of the first slab support element 31.

[0201] In other words, the first side support element 32 is arranged to lie on the upper surface 711 of the first floor element 71 so that vertical load of the first side element 32 is supported, and the second floor element 72 is arranged to lie on the upper surface 313 of the first slab support element 31 so that weight of the second floor element 72 is supported to the first slab support element 31 and to the load bearing structure 8.

[0202] Figure 7 shows schematically a top view of one embodiments of a construction system according to the present invention.

[0203] In this embodiment, the floor 7 comprises a third floor element 73 supported to the load bearing structure 8 of the building, the base slab 2 of the modular room unit 1 is arranged to extend between the third floor element 73 and the first floor element 71.

[0204] The first support part 3 comprises a second side support element 36, the second side support element 36 corresponding to the first side support element 32. The second side support element 36 of the first support part 3 is supported to the third floor element 73 and the second side support element 36 is arranged to transfer loads from the base slab 2 to the third floor element 73.

[0205] Figure 8 shows schematically a top view of one embodiments of a construction system according to the present invention.

[0206] In this embodiment, the modular room unit 1 comprises a second support part 9, the second support part 9 corresponding to the first support part 3, and the second support part 9 is fixedly connected to the fourth edge (24) of the base slab 2.

[0207] The second support part 9 comprises the second slab support element 11, and the third side support element 38, or the second slab support element 11, the third side support element 38 and the fourth side support element 39.

[0208] In some embodiments, the second slab support element 11 and the third side support element 38 may be provided as a single part of as an integral support structure in the second support part 9.

[0209] Further in some further embodiments, the second slab support element 11, the third side support element 38 and the fourth side support element 39 are provided as a single part of as an integral support structure in the second support part 9.

[0210] The embodiments shown in figures 7 and 8 may comprise any feature of the construction system disclosed in figure 6.

[0211] In a preferred embodiment, the first floor element 71 comprises one or more hollow core slabs.

[0212] In certain embodiments, the second floor element 72 comprises one or more hollow core slabs.

[0213] In certain embodiments, the third floor element 73 comprises one or more hollow core slabs.

[0214] In certain embodiments, the fourth floor element 74 comprises one or more hollow core slabs.

[0215] A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank is a precast slab of prestressed concrete typically used in the construction of floors in multi-story apartment buildings. The precast concrete slab has tubular voids extending the full length of the slab, typically with a diameter equal to the 2 / 3-3 / 4 the thickness of the slab. This makes the slab much lighter than a massive solid concrete floor element of equal thickness or strength. The reduced weight also lowers material and transportation costs. The slabs are typically 120 cm wide with standard thicknesses normally between 15 cm and 50 cm. Reinforcing steel wire rope provides bending resistance. The hollow core slab having a first end and a second end. The tubular voids extending in a direction between the first end and the second end of the hollow core slab. Typically, the hollow core slab is installed so that first end and the second end are supported.

[0216] The invention further relates to a method for installing a modular room unit 1.

[0217] The method comprises steps: providing a load bearing structure 8 of a building, a first floor element 71, a second floor element 72, and a modular room unit 1 comprising a base slab 2, a first side support element 32 and a first slab support element 31, supporting the first floor element 71 to the load bearing structure 8 to provide the supported first floor element 71, supporting the first side support element 32 of the modular room unit 1 to the supported first floor element 71 to provide the supported modular room unit 1, and supporting a second floor element 72 to a first slab support element 31 of the supported modular room unit 1 to provide the supported second floor element 72.

[0218] In certain embodiments, the method further comprises providing a uniform floor by casting a j oint grouting into gaps between the supported first floor element 71, the supported second floor element 72 and the base slab 2 of the supported modular room unit 1.

[0219] In certain embodiments, the method further comprises providing a uniform floor by casting a j oint grouting into gaps between the supported first floor element 71, the supported second floor element 72, the third floor element 72 and the fourth floor element 74 and the base slab 2 of the supported modular room unit 1.

[0220] In certain embodiments, the method further comprises providing a uniform floor by casting a j oint grouting into gaps between the supported first floor element 71, the supported second floor element 72 and the base slab 2 of the supported modular room unit 1.

[0221] In certain embodiments, the method further comprises the construction system 100 comprises a third floor element 73 and the modular room unit 1 comprises a second side support element 36; and the method comprises supporting a third floor element 73 to the load bearing structure 8 to provide a supported third floor element 73 and supporting the second side support element 36 of the modular room unit 1 to the supported third floor element 73, and providing a uniform floor by casting a joint grouting into gaps between the supported first floor element 71, the supported second floor element 72, the supported third floor element 73, and the base slab 2 of the supported modular room unit 1.

[0222] In certain embodiments, the base slab 2 having an upper surface 25 and a lower surface 26, the proximal edge 322 of the first side support element 32 is arranged to the vicinity the upper surface 25 of the base slab 2 or in connection with the upper surface 25 of the base slab 2, and the proximal edge 312 of the first slab support element 31 is arranged to the vicinity the lower surface 26 of the base slab 2 or in connection with the lower surface 26 of the base slab 2.

[0223] In certain embodiments, the method comprises installing an upper floor load bearing structure 8a after installing the modular room unit 1.

[0224] In certain embodiments, the method is carried out with any above disclosed embodiment of the modular room unit 1.

[0225] In certain embodiments, the method being arranged to provide any above disclosed embodiment of a construction system 100.

[0226] The invention has been described above with reference to the examples shown in the figures. However, the invention is in no way restricted to the above examples but may vary within the scope of the claims.

Claims

CLAIMS1. A modular room unit (1) c h a r a c t e r i z e d in that:- modular room unit (1) comprises a base slab (2), the base slab (2) having a first edge (21), a second edge (22), a third edge (23) and a fourth edge (24), the third edge (23) extending between the first edge (21) and the second edge (22), and the fourth edge (24) is provided opposite to the third edge (23),- the modular room unit (1) comprises wall elements (10a, 10b, 10c, lOd) defining a room space (50) of the modular room unit (1),- the modular room unit (1) comprises a first slab support element (31), the first slab support element (31) provided in connection with the third edge (23) of the base slab (2), and the first slab support element (31) is arranged to extend away from the base slab (2) in a direction between the third edge (23) and the fourth edge (24) of the base slab (2); and- the modular room unit (1) comprises a first side support element (32), the first side support element (32) provided in connection with the base slab (2), and the first side support element (32) is arranged to extend away from the base slab (2) in a direction between the first edge (21) and the second edge (22) of base slab (2).

2. A modular room unit (1) according to claim 1, c h a r a c t e r i z e d in that:- the modular room unit (1) comprises a first support part (3), and the first slab support element (31) and the first side support element (32) are provided to the first support part (3); or- the modular room unit (1) comprises a first support part (3), and the first slab support element (31) is provided to the first support part (3), and the first support part (3) having a first end (301) and a second end (302), the first side support element (32) is provided to the first end (301) of the first support part (3), and the first support part (3) comprises a second side support element (36) provided to the second end (302) of the first support part (3); or- the modular room unit (1) comprises a first support part (3), and the first slab support element (31) is provided to the first support part (3), and the first support part (3) having a first end (301) and a second end (302), the first side support element (32) is provided to the first end (301) of the first support part (3), and the first support part (3) comprises a second side support element (36), the second side support element (36) is provided to the second end (302) of the firstsupport part (3), and the second side support element (36) corresponding the first side support element (32).

3. A modular room unit (1) according to claim 1, c h a r a c t e r i z e d in that:- the modular room unit (1) comprises the first slab support element(31) and the first side support element (32), and the first slab support element (31) and the first side support element (32) are provided as separate elements; or- the modular room unit (1) comprises a second side support element(32), the second side support element (36) being provided in connection with the second edge (22) of the base slab (2), and the second side support element (36) is arranged to extend away from the base slab (2) in a direction between the first edge (21) and the second edge (22) of base slab (2), the first side support element (32) being provided in connection with the first edge of the base slab (2), and- the modular room unit (1) comprises the first slab support element (31), the first side support element (32) and the second side support element (36), and the first slab support element (31), the first side support element (32) and the second side support element (36) are provided as separate elements.

4. A modular room unit (1) according to claim 1, c h a r a c t e r i z e d in that the base slab (2) comprises an upper surface (25) and a lower surface (26), and that:- the first side support element (32) is arranged above the lower surface (26) of the base slab (2) and the first slab support element (31) is arranged at the level of the lower surface (26) of the base slab (2) or below the lower surface (26) of the base slab (2); or- the first side support element (32) and the second side support element (36) are arranged above the lower surface (26) of the base slab (2) and the first slab support element (31) is arranged at the level of the lower surface (26) of the base slab (2) or below the lower surface (26) of the base slab (2).

5. A modular room unit (1) according to claim 4, c h a r a c t e r i z e d in that:- the first side support element (32) or the first and second side support elements (32, 36) are arranged above the upper surface (25) of the base slab (2); or- the first side support element (32) or the first and second side support elements (32, 36) are arranged to the vicinity of the upper surface (25) of the base slab (2); or- the first side support element (32) or the first and second side support elements (32, 36) are arranged above the first slab support element (31); or- the first side support element (32) or the first and second side support elements (32, 36) are arranged to the vicinity of the upper surface (25) of the base slab (2), and the first side support element (32) is arranged above the first slab support element (31).

6. A modular room unit (1) according to any one of claims 1 to 5, c h a r a c t e r i z e d in that:- the first side support element (32) comprises a distal edge (321) arranged at a second distance from the first edge (211) of the base slab (2) and a proximal edge (322), the proximal edge (322) ofthe first side support element (32) is provided in connection with the first edge (21) of the base slab (2) or in connection with the third edge (23) of the base slab (2); or- the first side support element (32) extending in a direction between the first end (301) and the second end (302) of the first support part (3); or- the first side support element (32) is arranged to be rested on a floor element beside the modular room unit (1); or- the first side support element (32) comprises a steel plate extending in a direction between the first end (301) and the second end (302) of the first support part (3), and the first side support element (32) is arranged to be rested on a floor element beside the first support part (3).

7. A modular room unit (1) according to any one of claims 1 to 6, c h a r a c t e r i z e d in that:- the first support part (3) comprises a second side support element (36), the second side support element (36) corresponding to the first side support element (36); or- the first support part (3) comprises a second side support element (35) arranged to be supported to a load bearing structure of a building.

8. A modular room unit (1) according to any one of claims 2 to 7, c h a r a c t e r i z e d in that:- the first support part (3) comprises a first connecting element (33) arranged to connect the first slab support element (31) and the first side support element (32); or- the first support part (3) comprises a first connecting element (33) arranged to connect the first slab support element (31) and the first side support element (32), the first support part (3) comprises a first edge connecting element (34) arranged to connect the first support part (3) to the base slab (2); or- the first support part (3) comprises a first edge connecting element (34) arranged to connect the first support part (3) to the base slab (2); or- the first support part (3) comprises a first connecting element (33) arranged to connect the first slab support element (31) and the first side support element (32), the first support part (3) comprises a first edge connecting element (34) fixed to base slab (2), and the first edge connecting element (34) is connected to the first slab support element (31) and to the first connecting element (33).

9. A modular room unit (1) according to any one of claims 1 to 8, c h a r a c t e r i z e d in that:- the modular room unit (1) comprises a one or more lead-throughs (6) provided to the base slab (2), the one or more lead-throughs (6) are arranged to extend through the base slab (2); or- the modular room unit (1) comprises one or more lead-throughs (6) provided to the base slab (2), the one or more lead-throughs (6) are arranged to extend through the base slab (2), and the one or more lead-throughs (6) comprise fire protection elements (61) in connection with lead-throughs (6).

10. A modular room unit (1) according to any one of claims 1 to 9, c h a r a c t e r i z e d in that:- the base slab (2) is made of concrete and the first support part (3) is made of steel; or- the base slab (2) is made of concrete, the first support part (3) is made of steel and the wall elements (10a, 10b, 10c, lOd) comprises panels; or- the base slab (2) is made of concrete, the first support part (3) is made of steel and the wall elements (10a, 10b, 10c, lOd) comprises panels made of sheet; or- the base slab (2) is made of concrete, the first support part (3) is made of steel and the wall elements (10a, 10b, 10c, lOd) are made of thin metal sheets.

11. A construction system (100) c h a r a c t e r i z e d in that:- the construction system (100) comprises a floor (7), a load bearing structure (8) of a building and a modular room unit (1); and the floor (7) comprises a first floor element (71), a second floor element (72) and a base slab (2) of the modular room unit (1),- the base slab (2) of the modular room unit (1) having a first edge (21), a second edge (22), a third edge (23) and a fourth edge (24); the third edge (23) is arranged to extend between the first edge (21) and the second edge (22), and the fourth edge (24) is provided opposite to the third edge (23); the modular room unit (1) further comprises wall elements (10a, 10b, 10c, lOd) defining a room space (50) of the modular room unit, the modular room unit (1) comprises a first slab support element (31) provided in connection with the third edge (23); , the first slab support element (31) is arranged to extend away from the base slab (2) in a direction between the third edge (23) and the fourth edge (24) of the base slab (2); the modular room unit (1) comprises a first side support element (32), , the first side support element (32) is arranged to extend away from the base slab (2) in a direction between the first edge (21) and the second edge (22) of base slab (2),- the first floor element (71) is supported to the load bearing structure (8) of a building,- the first side support element (32) is supported to the first floor element (71) and the first side support element (32) is arranged to transfer loads from the base slab (2) to the first floor element (71), and- the first slab support element (31) is arranged to provide a support for the second floor element (72).

12. A construction system (100) according to claim 11, c h a r a c t e r i z e d in that:- the floor (7) comprises a third floor element (73) supported to the load bearing structure (8) of the building, the base slab (2) of the modular room unit (1) is arranged to extend between the third floor element (73) and the first floor element (71),-the base slab (2) comprises a second side support element (36), the second side support element (36) corresponding to the first side support element(32) and arranged to extends away from the base slab (2) in a direction between the third edge (23) and the fourth edge (24) of the base slab (2) and opposite to the direction of the first side support element (32);, and- the second side support element (36) is supported to the third floor element (73) and the second side support element (36) is arranged to transfer loads from the base slab (2) to the third floor element (73).

13. A construction system (100) according to claim 11 or 12, c h a r a c t e r i z e d in that:- modular room unit (1) comprises a second slab support element (11) provided in connection with the third edge (23), the second slab support element (11) is arranged to extend away from the base slab (2) in a direction between the third edge (23) and the fourth edge (24) of the base slab (2); the modular room unit (1) comprises a third side support element (38), the third side support element (38) is arranged to extend away from the base slab (2) in a direction between the first edge (21) and the second edge (22) of base slab (2); or- modular room unit (1) comprises a comprises a second slab support element (11) provided in connection with the third edge (23), the third slab support element (11) is arranged to extend away from the base slab (2) in a direction between the third edge (23) and the fourth edge (24) of the base slab (2); the modular room unit (1) comprises a third side support element (38), the third side support element (38) is arranged to extend away from the base slab (2) in a direction between the first edge (21) and the second edge (22) of base slab (2); and the modular room unit (1) comprises a fourth side support element (39), the fourth side support element (39) is arranged to extend away from the base slab (2) in a direction between the first edge (21) and the second edge (22) of base slab (2) and opposite to the third side support element (38).

14. A construction system (100) according to any one of claims 11 to 13, c h a r a c t e r i z e d in that:- the first floor element (71) having an upper surface (711) and a lower surface (712), the first side support element (32) having a lower surface (324), the lower surface (324) of the first side support element (32) is arranged on the upper surface (711) of the first floor element (71), the first slab support element (31) having an upper surface (313), the second floor element (72) having an upper surface (721) and a lower surface (722), the lower surface (722) of the second floorelement (72) is arranged on the upper surface (313) of the first slab support element (31); or- the first floor element (71) having an upper surface (711) and a lower surface (712), the first side support element (32) having a lower surface (324), the lower surface (324) of the first side support element (32) is arranged on the upper surface (711) of the first floor element (71), the first slab support element (31) having an upper surface (313), the second floor element (72) having an upper surface (721) and a lower surface (722), the lower surface (722) of the second floor element (72) is arranged on the upper surface (313) of the first slab support element (31), and the upper surface (711) of the first floor element (71) and the upper surface (721) of the second floor element (72) are arranged to extend at the same level; or- the first floor element (71) having an upper surface (711) and a lower surface (712), the first side support element (32) having a lower surface (324), the lower surface (324) of the first side support element (32) is arranged to rest on the upper surface (711) of the first floor element (71), the first slab support element (31) having an upper surface (313), the second floor element (72) having an upper surface (721) and a lower surface (722), the lower surface (722) of the second floor element (72) is arranged to rest on the upper surface (313) of the first slab support element (31), and the upper surface (711) of the first floor element (71) and the upper surface (721) of the second floor element (72) are arranged to extend at the same level; or- the first floor element (71) having an upper surface (711) and a lower surface (712), the first side support element (32) having a lower surface (324), the lower surface (324) of the first side support element (32) is arranged to rest on the upper surface (711) of the first floor element (71), the first slab support element (31) having an upper surface (313), the second floor element (72) having an upper surface (721) and a lower surface (722), the lower surface (722) of the second floor element (72) is arranged to rest on the upper surface (313) of the first slab support element (31), and the upper surface (711) of the first floor element (71) and the upper surface (721) of the second floor element (72) are arranged to extend at the same level, the base slab (2) having an upper surface (25) and a lower surface (26), the proximal edge (322) of the first side support element (32) is arranged to the vicinity the upper surface (25) of the base slab (2) or in connection with the upper surface (25) of the base slab (2), and the proximal edge (312) of the first slab support element (31) is arranged below the lower surface (26) of the base slab (2).

15. A construction system (100) according to any one of claimsll to 14 c h a r a c t e r i z e d in that:- the modular room unit (1) being a modular room unit (1) according to any one of claims 1 to 10.

16. A method for installing a modular room unit (1), c h a r a c t e r i z e d in that:- the method comprises steps:- providing a load bearing structure (8) of a building, a first floor element (71), a second floor element (72), and a modular room unit (1), the modular room unit (1) comprises a base slab (2), a first side support element (32) and a first slab support element (31),- supporting a first floor element (71) to the load bearing structure (8) to provide a supported first floor element (71),- supporting the first side support element (32) of the modular room unit (1) to the supported first floor element (71) to provide a supported modular room unit (1), and- supporting a second floor element (72) to a first slab support element (31) of the supported modular room unit (1) to provide a supported second floor element (72).

17. A method according to claim 16, c h a r a c t e r i z e d in that:- method further comprises providing a uniform floor by casting a joint grouting into gaps between the supported first floor element (71), the supported second floor element (72) and the base slab (2) of the supported modular room unit (1); or- the construction system (100) comprises a third floor element (73) and the modular room unit (1) comprises a second side support element (36); and the method comprises supporting a third floor element (73) to the load bearing structure (8) to provide a supported third floor element (73) and supporting the second side support element (36) of the modular room unit (1) to the supported third floor element (73), and providing a uniform floor by casting a joint grouting into gaps between the supported first floor element (71), the supported second floor element (72), the supported third floor element (73), and the base slab (2) of the supported modular room unit (1).

18. A method according to claim 16 or 17, characterized in that:- the method is carried out with a modular room unit (1) according to any one of claims 1 to 10; or - the method being arranged to provide a construction system (100) according to any of claims 11 to 15.

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