EP0145247B1 - Concrete floor panel and floor system - Google Patents

Concrete floor panel and floor system Download PDF

Info

Publication number
EP0145247B1
EP0145247B1 EP84307598A EP84307598A EP0145247B1 EP 0145247 B1 EP0145247 B1 EP 0145247B1 EP 84307598 A EP84307598 A EP 84307598A EP 84307598 A EP84307598 A EP 84307598A EP 0145247 B1 EP0145247 B1 EP 0145247B1
Authority
EP
European Patent Office
Prior art keywords
panel
bars
ribs
reinforcing
panels
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.)
Expired
Application number
EP84307598A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0145247A2 (en
EP0145247A3 (en
Inventor
Richard Paul Morris
Kenneth Herbert Betts
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tate Access Floors Leasing Inc
Original Assignee
Construction Specialties Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Construction Specialties Ltd filed Critical Construction Specialties Ltd
Priority to AT84307598T priority Critical patent/ATE40581T1/de
Publication of EP0145247A2 publication Critical patent/EP0145247A2/en
Publication of EP0145247A3 publication Critical patent/EP0145247A3/en
Application granted granted Critical
Publication of EP0145247B1 publication Critical patent/EP0145247B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/024—Sectional false floors, e.g. computer floors
    • E04F15/02405—Floor panels

Definitions

  • This invention relates to a lightweight floor panel made of a cementitious material.
  • Floor panels are commonly used in computer rooms and other areas where it is convenient to raise the floor on pedestals and to place wiring and other mechanism beneath the floor for convenient access for service.
  • Such floor panels have commonly in the past consisted of materials such as pressed wood or chipboard encased in metal sheets or two part welded steel panels.
  • the chipboard and metal panels although relatively light in weight, have proven expensive to manufacture and also are not entirely fireproof.
  • the applicant therefore has conceived a concrete floor panel.
  • a major difficulty with concrete floor panels has been that in order to achieve sufficient strength (typically 1,500 pounds per square inch is required), the panels have been so heavy that they could not be handled, installed, and removed for access to the space below them without special machinery.
  • GB-A-2030630 discloses a lightweight floor panel comprising: a body of a cementitious material, the body being of generally thin and flat rectangular shape with a planar upper surface and a lower surface with ribs formed therein, said ribs providing strength and reducing the amount of material in said panel, and said body defining corner regions at which the panel can be supported in use; reinforcing members in said body disposed substantially parallel to said upper surface and comprising two members arranged in a crossed configuration and four members arranged along each side of the panel within the body and terminating at said corner regions; and a reinforcing mesh sheet extending in said body substantially parallel to said upper surface thereof and covering at least substantially the entire area of the panel within said side reinforcement members.
  • the members in a crossed configuration extend diagonally from corner to corner of the panel.
  • the reinforcing members are pre-assembled and welded together to form a unitary reinforcing structure which is cast into the cementitious material.
  • CA-A-854940 discloses a broadly similar floor panel, except that there is no reinforcing mesh sheet, and the diagonally extending members are replaced by a grid of members extending parallel to the sides of the panel.
  • the manufacture of the pre-assembled reinforcing structure adds to the complexity and cost of the panel.
  • the reinforcing members comprise a set of individual and separate substantially rectilinear reinforcing bars, the crossed bars extending generally centrally between, and generally parallel to, respective pairs of opposite sides of the panel, each of the said crossed bars being arranged with respective end portions thereof resting on said bars at respectively opposite sides of the panel, whereby loads imposed on the upper surface of the panel in use tend to be transferred by the bars to said corner regions.
  • the panel 10 is essentially square and comprises a body of fiber reinforced concrete.
  • Fiber reinforced concrete is now well known and may consist of cement, sand, glass fibers, water; it may also include a plasticizer and polymers to strengthen the product. Pearlite or other lightweight aggregates may also be included to reduce the weight of the mix.
  • the invention is not concerned with the particular formulation but rather with the physical design of the panel.
  • the panel 10 has a substantially planar upper surface 12 and a lower surface 14 having ribs generally indicated at 16 formed therein.
  • the panel 10 is very thin in relation to its length and width.
  • the length and width of the panel are typically 610 mm, while the overall thickness of the panel (dimension t) is typically only about 43 mm except at the corner regions (see later).
  • the ribs 16 are thus provided to increase the strength of the panel while reducing the weight thereof.
  • the ribs 16 include four side ribs 18 one extending along each lower side of the panel 10, and two major ribs 20 arranged at right angles to each other and dividing the lower surface of the panel into four quadrants 22.
  • the height of each side rib and major rib 18, 20 (dimension d1) is about 20 mm; the width of each side rib 18 (dimension d2) is about 38 mm at its base, and the width of each major rib 20 (dimension d3) is about 30 mm at its base.
  • Each quadrant 22 has formed therein a pair of minor ribs 24 (Fig. 3) which extend parallel to one another and parallel to the minor ribs in the other quadrants.
  • the minor ribs 24 are much smaller than the major ribs 20, being only about 3 mm in height and 12 mm in width.
  • the panel is also shaped to define corner regions which are generally denoted 26 in Fig. 3 and which extend below the major ribs 18, 20 for example by about 5 mm. These regions are designed to act as support areas at which the panel can rest on pedestals or other supports in an assembled floor system as will be described in more detail later, primarily with reference to Fig. 4.
  • Panel 10 further includes a set of steel reinforcing rods 28 (Figs. 1 and 2) all extending generally parallel to the upper surface 12 of the panel.
  • the rods at the sides of the panel are individually denoted 32 while the crossed rods are denoted 34.
  • rods 32 will be say, 10 mm in diameter while rods 34 will be 7-8 mm in diameter.
  • the rods are spaced slightly above the bottom of the panel, typically about 5 mm above the bottoms of the side ribs 18 and the major ribs 20.
  • the mould in which the panel is made includes raised supports, two for each reinforcing rod 28, one at each end of each rod 28.
  • the reinforcing rods 28 are placed on the raised supports before the concrete is poured.
  • the raised supports leave small pockets 36 (Fig. 3) in the panel and through which the rods 28 are exposed (although in practice, a thin "skin" of concrete tends to form over the exposed surface of the rod).
  • the pockets 36 are not visible when the panel is installed and have a negligible effect on the strength of the panel. It will be noted that pockets 36 are provided at the ends of the major ribs 18 and 20. Thus, the pockets 36 in the side ribs 18 terminate adjacent and effectively define the corner regions 26 while the pockets in the ribs 20 are located where those ribs meet the side ribs 18
  • the reinforcing rods 32 at the sides of the panel terminate within the corner regions 26 and the crossed rods 34 rest at their ends on the side rods 32.
  • loads imposed on the upper surface of the panel in use will tend to be transferred by way of the rods 34 to the rods 32 and, from those rods, to corner regions 26 of the panel where the panel can be supported.
  • the two crossed rods 34 are arranged in contact with one another approximately at their mid points and may be wired together.
  • the lower of the two rods 34 as seen in Fig. 1 is straight while the other rod 34 is bent slightly at its mid point to define two rectilinear sections and pass over the straight rod. The extent of the bend is just sufficient that all four ends of both rods 24 lie substantially in a common plane.
  • Panel 10 also includes a square expanded steel mesh sheet 40 (Fig. 2), the overall dimensions of which are approximately one or two centimeters smaller than the length and width of the panel, placed just below the upper surface 12.
  • the expanded metal sheet 40 serves to prevent cracking of the upper surface of the panel should an impact occur such as when a heavy piece of equipment is dropped on the panel. Also, sheet 40 helps to resist shrinkage stresses on curing of the concrete in manufacture.
  • the rods 28 are placed in the mould on the raised supports referred to above and an appropriate fiber reinforced concrete mixture is poured.
  • an appropriate fiber reinforced concrete mixture is poured.
  • the mesh sheet 40 is placed on the concrete. Pouring is then completed and the upper surface is finished.
  • the panel shown weighs only about 40 pounds and yet could support a load of at least 1,500 pounds without cracking.
  • each panel 10 For installation as part of an elevated flooring system (see Fig. 4), each panel 10 includes a recess 42 in its upper surface at each corner region 26 (see also Fig. 1). Each recess includes a planar upper surface 44 and an edge 46 perpendicular to the surface 44 and extending at 45° to each of the adjacent sides of the panel.
  • the four adjacent recesses 42 define a square composite recess 48 (Fig. 4) to accept a square hold down plate 50 for coupling to a pedestal 51 below the panels.
  • hold down plate 50 is secured by a screw 52 to a lower support plate 54 having a threaded hole 56 therein.
  • Plate 54 Corners of plate 54 are turned up as indicated at 54a to engage behind the corner regions 26 of the panels and assist in locating the same during installation.
  • Plate 54 is in turn welded to a tube 60.
  • the tube 60 receives in its bottom a threaded post 62 welded to a base plate 64.
  • a levelling nut 66 or post 62 serves to adjust the height of the support plate 54.
  • the lower surface of the panel also includes recesses (denoted 70) below each of the recesses 42 in the upper panel surface. These recesses 70 in effect define ledges at the corners of the panel which can be engaged by mechanical lifting equipment for raising and lowering the panels during installation. A notch 72 in the extreme corner of the panel above recess 70 is also provided to accommodate the lifting equipment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Floor Finish (AREA)
  • Panels For Use In Building Construction (AREA)
EP84307598A 1983-11-04 1984-11-02 Concrete floor panel and floor system Expired EP0145247B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84307598T ATE40581T1 (de) 1983-11-04 1984-11-02 Fussbodenpaneel aus beton und fussbodensystem.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA440454 1983-11-04
CA000440454A CA1206346A (en) 1983-11-04 1983-11-04 Concrete floor panel and floor system

Publications (3)

Publication Number Publication Date
EP0145247A2 EP0145247A2 (en) 1985-06-19
EP0145247A3 EP0145247A3 (en) 1986-05-14
EP0145247B1 true EP0145247B1 (en) 1989-02-01

Family

ID=4126447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84307598A Expired EP0145247B1 (en) 1983-11-04 1984-11-02 Concrete floor panel and floor system

Country Status (9)

Country Link
EP (1) EP0145247B1 (enrdf_load_stackoverflow)
JP (1) JPS60168862A (enrdf_load_stackoverflow)
AT (1) ATE40581T1 (enrdf_load_stackoverflow)
AU (1) AU571020B2 (enrdf_load_stackoverflow)
CA (1) CA1206346A (enrdf_load_stackoverflow)
DE (1) DE3476568D1 (enrdf_load_stackoverflow)
HK (1) HK55891A (enrdf_load_stackoverflow)
SG (1) SG31891G (enrdf_load_stackoverflow)
ZA (1) ZA848466B (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0135240A3 (fr) * 1983-09-21 1986-03-19 "C.B.R. Béton" Dalle autoportante pour faux-plancher
GB8523810D0 (en) * 1985-09-27 1985-10-30 Intek Floors Ltd Concrete slab
JPS6332058A (ja) * 1986-07-22 1988-02-10 株式会社　梅彦 石材の床張り方法
GB8904537D0 (en) * 1989-02-28 1989-04-12 Tate Access Floors Limited Access flooring
JP2612638B2 (ja) * 1990-11-26 1997-05-21 フクビ化学工業株式会社 セメントパネル及びセメントパネルの製造方法
GB9914294D0 (en) * 1999-06-19 1999-08-18 Carroll John J Flooring
ATE272761T1 (de) * 2000-06-07 2004-08-15 Alho Systembau Gmbh Soernewitz Zerlegbare raumzelle
GB2363806B (en) * 2000-06-23 2003-05-14 Michael Barrie Kemp Improved building/flooring panel
JP4989997B2 (ja) * 2007-03-26 2012-08-01 ニチアス株式会社 フロアパネル及びフロアパネルの製造方法
CN108049592B (zh) * 2017-12-30 2024-04-02 浙江亚厦装饰股份有限公司 地面铺装底座、铺装组件及铺装方法
CN109914742A (zh) * 2019-04-03 2019-06-21 苏维鼎 一种装配式预制高强混凝土地面砖体系及其施工方法
CN111075144A (zh) * 2019-12-23 2020-04-28 浙江亚厦装饰股份有限公司 一种地面瓷砖的安装结构
GB2614906A (en) * 2022-01-24 2023-07-26 Dideco Ltd Composite floor construction

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1364906A (fr) * 1963-07-27 1964-06-26 Système de plancher entièrement préfabriqué et fini en usine
FR1544073A (fr) * 1967-09-01 1968-10-31 Plancher creux en dalles de béton mobiles
CA854940A (en) * 1967-10-02 1970-11-03 H. Bruce James Construction panel and method of producing same
DE2314463B2 (de) * 1973-03-23 1976-10-14 Bodenbelag
DE2360784A1 (de) * 1973-12-06 1975-06-12 Fahrenkamp Doppelbodensystem aus stahlleichtbetonplatten- und -stuetzen
DE2558967A1 (de) * 1975-12-29 1977-07-07 Dietrich Steinkopff Bodenbelag, insbesondere fuer sportplaetze
US4067156A (en) * 1976-01-12 1978-01-10 Donn Products, Inc. Computer floor structure
GB2030630A (en) * 1978-09-29 1980-04-10 Rintoul Pty Ltd Floor Tile

Also Published As

Publication number Publication date
ZA848466B (en) 1985-06-26
EP0145247A2 (en) 1985-06-19
ATE40581T1 (de) 1989-02-15
AU3510384A (en) 1985-05-16
CA1206346A (en) 1986-06-24
AU571020B2 (en) 1988-03-31
SG31891G (en) 1991-06-21
JPH0259900B2 (enrdf_load_stackoverflow) 1990-12-13
JPS60168862A (ja) 1985-09-02
EP0145247A3 (en) 1986-05-14
HK55891A (en) 1991-07-26
DE3476568D1 (en) 1989-03-09

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