EP3728755A1 - Demountable floor construction - Google Patents
Demountable floor constructionInfo
- Publication number
- EP3728755A1 EP3728755A1 EP18836242.0A EP18836242A EP3728755A1 EP 3728755 A1 EP3728755 A1 EP 3728755A1 EP 18836242 A EP18836242 A EP 18836242A EP 3728755 A1 EP3728755 A1 EP 3728755A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- planks
- floor
- beams
- concrete
- plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000010276 construction Methods 0.000 title abstract description 9
- 238000009408 flooring Methods 0.000 claims abstract description 10
- 239000011178 precast concrete Substances 0.000 claims abstract description 7
- 210000001503 joint Anatomy 0.000 description 19
- 239000004567 concrete Substances 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000011065 in-situ storage Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000005336 cracking Methods 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 230000002860 competitive effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/023—Separate connecting devices for prefabricated floor-slabs
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
- E04B2/04—Walls having neither cavities between, nor in, the solid elements
- E04B2/06—Walls having neither cavities between, nor in, the solid elements using elements having specially-designed means for stabilising the position
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
- E04B5/06—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement with beams placed against one another optionally with pointing-mortar
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2103/00—Material constitution of slabs, sheets or the like
- E04B2103/02—Material constitution of slabs, sheets or the like of ceramics, concrete or other stone-like material
Definitions
- the present invention relates to precast concrete floors suitable for use in concrete buildings, for schools, hotels, office, retail and other premises.
- the invention is also applicable to precast concrete floors that connect to conventional steel framed buildings. It is an alternative to building floors that consist of concrete on metal deck spanning onto steel beams, and it can be integrated with this solution or used as a direct replacement.
- the invention is particularly applicable to floors which are required to be
- a conventional solution would be to either cast an in situ topping or an in situ joint.
- a steel framed building will typically have an array of vertical columns arranged in a grid structure joined at each floor level by horizontal beams.
- Various types of floor system for creating a floor or deck supported by the beams have been proposed.
- diaphragm forces across a floor, as well as making sure that joints do not open up, or suffer excessive cracking when the floor is subject to vertical loads and in-plane loads.
- precast and prefabricated elements that can be assembled easily on site and remain competitive in terms of weight and profile depth with prior art solutions.
- Embodiments of the present invention utilise primary precast floor components made from reinforced concrete or prestressed concrete elements.
- the secondary components are an inverted U-shaped planks with a depending rib running along each longitudinal edge. These secondary components abut (with a narrow grouted gap) other secondary components along the longitudinal edge to create a ribbed floor.
- the secondary planks are connected together at regular centres by intermediate connector plates that transfer tensile forces across the grouted joint so that the floor can act as a complete diaphragm.
- the ends of the secondary components are supported on primary beam elements that typically span between columns.
- the secondary components have a corner connector plate that extends across the grouted joint at the primary beam, to reduce cracking over the primary beam and to provide continuity across that joint, so that the floor can act as a complete diaphragm.
- the primary beams can be an inverted T-shaped profile which enables the secondary components to sit on a support nib.
- primary support beams can also be rectangular beams below the planks, or steel beams.
- the secondary planks are continuous over such support beams.
- the primary beams support the secondary planks and sit on columns.
- a connector plate at the column connects the secondary planks to the primary beam and to the column above.
- the column connector plates transfer diaphragm action across the joints and are designed to reduce cracking in the floors and to create a performance similar to a concrete floor on metal deck on steel beams.
- All the connector plates are designed to transfer tensile forces across joints.
- the plates can be recessed into the floor. Tolerance is achieved by inserting the connector plates into grouted or concreted joints.
- the connector plates are designed to be unbolted and thus the system can be
- planks are precast with sleeves for bolt holes and recesses so that the various elements of the flooring system can be interconnected with metal plates bolted into the concrete elements. These plates work in combination with grouted joints to create a complete diaphragm. Bolted joints are normally not possible because of the need to allow tolerances.
- the system can be disassembled in order to remove or re-configure the floor allowing at least some components to be reused.
- Figure 1 shows a perspective view from below of a floor section within a single bay or grid rectangle
- Figure 2 is a perspective view of a primary beam
- Figure 3 is a perspective view of a plank showing how it would be supported for craning into position together with a transparent view showing its internal
- Figure 4 is a view of a floor bay from above;
- Figure 5 shows a perspective view of two floors
- FIG. 6 is a detail showing a primary beam to column connection
- Figure 7 shows an exploded view of a typical column connection
- Figure 8 shows a slab connector plate for use in connecting the edges of two adjoining planks
- Figure 9 shows an exploded perspective view showing a beam connector plate for use in connecting planks on either side of a beam in position
- Figure 10 shows the beam connector plate figure 9
- Figure 11 shows an exploded view of a beam connector plate showing the elements of the bolts
- Figure 12 shows an exploded view of a typical column, beam, and plank connection.
- the modular flooring system described is intended to be installed in a multi-storey building such as a low rise office, retail premises, hotel or school.
- the building is defined by means of an array of vertical columns made up of individual floor height column sections 2 arranged in a grid structure, for example a 9m x 9m or 7.5m x 7.5m, or 9m xl2m grid as shown in figure 5.
- a single bay of the grid is illustrated in the drawings for simplicity.
- four vertical column sections 4 are interconnected by a pair of parallel horizontal primary beams 6.
- the floor between the beams is created by means of a series of adjoining precast concrete planks 10 which serve as the secondary components of the floor.
- Each concrete plank 10 is an elongate inverted U-shaped precast concrete element having ends 12 and ribs 14 depending on the longitudinal side edges.
- the plank has a substantially flat upper surface that defines the level of the floor.
- the upper surface has recesses as described later for the purpose of interconnecting the planks.
- the underside of the plank is the soffit.
- the concrete planks are precast with internal rebar reinforcement 20 as shown in figure 3.
- the planks have deeper side edges or ribs where the planks adjoin each other side by side creating a ribbed effect in the underside of the floor and providing sufficient depth of concrete to support connecting bolts.
- each rib 14 has a slight projection 16 to control the spacing of the planks as they abut each other to form a grout joint zone that when in filled provides a shear key between adjacent planks.
- the ribs act as beams supporting the flat plank surface.
- a typical inverted U channel plank has a width of 1500 to 3000mm between its side edges and a rib depth of 250 to 550mm at those edges and 120- 150mm in its middle region.
- the planks may span 6 to 12m between primary beams such that three planks can create a grid bay as illustrated in figures 1 and 4.
- the ends 12 of the longitudinal beams may be square or have an undercut rebate 24 which is sized to cooperate with the adjacent beam and allows the plank to be self- supporting on the beams 6 during construction.
- the ends of the planks sit on neoprene pads 64 on the beams.
- the joints between the planks are filled with a grout or concrete mix.
- Connector plates 54 link the planks across the beams 6 and therefore create a moment connection across the beams in the final condition.
- the longitudinal ribs 14 of the planks may be provided with apertures 44 for services to pass through if required.
- Lifting points 26 are provided on the plank so that it can be hoisted into position as shown in figure 3. Alternative lifting methods are possible such as by lifting it through service penetrations 44 in the ribs.
- Recesses 30 for the connector plates surrounding bolt sleeves 32 are pre-cast in the upper surface of the plank along the longitudinal edges. The bolt sleeves extend from the upper surface into the ribs 14. Recesses 40 surrounding bolt sleeves 42 are also formed at each comer of the end of the plank. These recesses 30, 40 are deep enough, for example 20mm, to accommodate the various connector plates 52, 54, 56, and 58 which are used to join the components of the flooring system together. The use of connector plates 52, 54, 56, 58 and bolts 50 rather than welded or in situ joints which require construction work during assembly, allows this flooring system to be demountable.
- the beams 6 are preferably of an inverted T-shaped section as shown in figure 2 with a lower flange 34 and web 36.
- the lower projecting flange 34 provides support for a base of a rib 14 during assembly, and neoprene pads 64 may be provided on this support surface.
- the beam 6 can be provided with penetrations or apertures 38 for the passage of services, as required.
- Connector plates 52, 54, 56, 58 are provided in various configurations as shown in figures 7 to 12.
- the plates are provided with bolts 50 that connect to the plates and are cast into and cooperate with the bolt sleeves 32, 42 precast into the planks.
- each bolt 50 is assembled from a counter sunk head 53 and a threaded stud 55.
- the head 53 is received in a hole in a connector plate and is connected to the stud 55 by means of a threaded sleeve coupler 51.
- the countersunk bolt head 53 can simply be unscrewed to facilitate removal of the connector plates 52, 54, 56, 58. Once the connector plates are removed the panels have no tensile capacity between the precast units, and can be separated by a concrete splitter for later reuse.
- the primary beams 6, are bolted to a column 4 through threaded bars 74 that sleeve through the beam, as shown in figure 12. Where the column is narrower than the width of the beam, these threaded bars will sleeve through the web 36 of the primary beam 6.
- the column connector plate 56 connects the primary beam to adjacent planks through bolts 50 cast into sleeves.
- the column connector plate can be detailed so that it has threaded bars 70 to connect to standard column shoes 72, or can be detailed to connect to steel or concrete columns.
- Connector plates 52 connect adjacent planks.
- Connector plates 54 bridge across a primary supporting beam and connector plates 58 can be used to connect other support beams below the planks.
- the flooring system made up of the components as described can be assembled on site without significant construction steps. There is no need for any propping during construction as the planks are self-supporting on the beams.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1721561.7A GB2569607B (en) | 2017-12-21 | 2017-12-21 | Demountable floor construction |
PCT/EP2018/086231 WO2019122149A1 (en) | 2017-12-21 | 2018-12-20 | Demountable floor construction |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3728755A1 true EP3728755A1 (en) | 2020-10-28 |
Family
ID=61131481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18836242.0A Withdrawn EP3728755A1 (en) | 2017-12-21 | 2018-12-20 | Demountable floor construction |
Country Status (9)
Country | Link |
---|---|
US (1) | US20210095466A1 (en) |
EP (1) | EP3728755A1 (en) |
KR (1) | KR20200100730A (en) |
CN (1) | CN111566291A (en) |
AU (1) | AU2018387263A1 (en) |
CA (1) | CA3085626A1 (en) |
GB (1) | GB2569607B (en) |
SG (1) | SG11202005469PA (en) |
WO (1) | WO2019122149A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021026600A1 (en) * | 2019-08-13 | 2021-02-18 | LWC Research Pty Ltd | Prefabricated floor panel, construction and method therefor |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK128948C (en) * | 1972-08-11 | 1980-04-14 | Bruun & Soerensen | Ice rink substrate |
FR2349004A2 (en) * | 1976-04-21 | 1977-11-18 | Saret | Concrete floor panel structure - has prestressed concrete, beams held in position by end spandrels and has panels holding in insulation |
FR2503776A1 (en) * | 1981-04-14 | 1982-10-15 | Charbonnages Sa Ste Indle Cale | MULTI-LEVEL BUILDING RESISTANT TO TELLURIC SHAKES |
IL91978A (en) * | 1989-10-12 | 1991-12-15 | Igal Erel | Modular prefabricated structure,the elements comprising it and a method for combining them |
FR2697553B1 (en) * | 1992-10-30 | 1995-01-20 | Bouygues Sa | Housing cell, process for constructing buildings and buildings obtained. |
WO1994010389A1 (en) * | 1992-11-05 | 1994-05-11 | Terence Foster Doolan | Building or construction element |
CN1118826A (en) * | 1994-05-05 | 1996-03-20 | 特兰斯·F·杜兰 | Building or construction element |
ES1057260Y (en) * | 2004-04-20 | 2004-10-16 | Colomer Ines Jackson | DEVICE FOR THE CONSTRUCTION OF BASEMENTS. |
-
2017
- 2017-12-21 GB GB1721561.7A patent/GB2569607B/en active Active
-
2018
- 2018-12-20 US US16/956,328 patent/US20210095466A1/en not_active Abandoned
- 2018-12-20 CA CA3085626A patent/CA3085626A1/en active Pending
- 2018-12-20 WO PCT/EP2018/086231 patent/WO2019122149A1/en unknown
- 2018-12-20 SG SG11202005469PA patent/SG11202005469PA/en unknown
- 2018-12-20 AU AU2018387263A patent/AU2018387263A1/en active Pending
- 2018-12-20 KR KR1020207020620A patent/KR20200100730A/en unknown
- 2018-12-20 EP EP18836242.0A patent/EP3728755A1/en not_active Withdrawn
- 2018-12-20 CN CN201880083203.8A patent/CN111566291A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
KR20200100730A (en) | 2020-08-26 |
SG11202005469PA (en) | 2020-07-29 |
GB2569607A (en) | 2019-06-26 |
CA3085626A1 (en) | 2019-06-27 |
GB2569607B (en) | 2020-03-04 |
CN111566291A (en) | 2020-08-21 |
US20210095466A1 (en) | 2021-04-01 |
WO2019122149A1 (en) | 2019-06-27 |
AU2018387263A1 (en) | 2020-06-25 |
GB201721561D0 (en) | 2018-02-07 |
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