EP0900898B1 - Spot footing - Google Patents

Spot footing Download PDF

Info

Publication number
EP0900898B1
EP0900898B1 EP98202944A EP98202944A EP0900898B1 EP 0900898 B1 EP0900898 B1 EP 0900898B1 EP 98202944 A EP98202944 A EP 98202944A EP 98202944 A EP98202944 A EP 98202944A EP 0900898 B1 EP0900898 B1 EP 0900898B1
Authority
EP
European Patent Office
Prior art keywords
footing
spot
spot footing
pillar
protective casing
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 - Lifetime
Application number
EP98202944A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0900898A3 (en
EP0900898A2 (en
Inventor
Kari Viljakainen
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.)
Tartuntamarkkinointi Oy
Original Assignee
Tartuntamarkkinointi Oy
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 Tartuntamarkkinointi Oy filed Critical Tartuntamarkkinointi Oy
Publication of EP0900898A2 publication Critical patent/EP0900898A2/en
Publication of EP0900898A3 publication Critical patent/EP0900898A3/en
Application granted granted Critical
Publication of EP0900898B1 publication Critical patent/EP0900898B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21—Connections specially adapted therefor
    • E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/10—Deep foundations
    • E02D27/12—Pile foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes

Definitions

  • the present invention relates to a spot footing needed for attaching a wooden or a precast concrete pillar to a foundation or for extending such a pillar, as defined in the preamble of claim 1.
  • precast concrete pillars are reinforced and extended in factory by providing the lower end of the precast pillar with a spot footing with dowels cast in the pillar. Loads received from the spot footing are transmitted via the footing dowels to the pillar concrete.
  • the pillar is additionally provided with main bars generally placed at the corners and extending over the entire length of the pillar. In this case, the forces from the spot footing dowels are transmitted to the main bar at the corner of the pillar, so there are three or four steel bars at the corner, depending on the type of spot footing used, to transmit the force needed for only one bar.
  • the pillar has coupling bolts placed in the corner areas to transmit the forces at the top end of the pillar from the main bars to the coupling bolts at the top end of the pillar.
  • the forces are transmitted via corrugated dowel bars, so there are at least two steel bars for one main bar at each corner of the pillar.
  • main bars and coupling bolts it is necessary to mount at least nine separate parts in the column form.
  • this traditional structure consumes a large amount of corrugated bar, comprises a large number of parts to be mounted and is therefore an expensive solution.
  • FI utility models no. 320, 341 and 544 present a solution that allows the number of dowel bars needed in the spot footing to be substantially reduced and that permits the dowel bars of the spot footing to simultaneously act as reinforcements of the pillar.
  • the spot footing comprises a bottom plate having a square shape and a hole for a threaded main bar of the pillar of the floor below as well as a protective casing for the nuts, in which the inner corner has been rounded into the shape of a quarter circle.
  • the main dowel bar of the spot footing is placed on top of the protective casing and it also functions as a main bar of the pillar.
  • DE-A-21 16 538 discloses a spot footing arrangement for attachment a concrete pillar to another building part below the pillar.
  • the spot footing arrangement in DE-A-21 16 538 has several bottom plates and protective casings with a top plate arranged at a distance from each other. Each top plate has an opening for a screw part.
  • the arrangement has separate centering means with a upper plate and a conical hollow into which a cylindrical centering tap can be arranged.
  • This centering tap is used in order to install the upper pillar part to the lower part, whereby during the installation the centering tap goes into the conical hollow and will thus be guided to a centering cylindrical hollow part.
  • the spot footing described in the present invention partly uses known technical solutions as used in the above-mentioned utility models, but only in respect of the disposal of the dowel bars and anchor bolt of the spot footing.
  • the main spot footing structure has been developed completely anew, thus achieving a more economical solution.
  • the present invention is based on a solution in which the force of the dowel bars of the spot footing acts in the footing area along a line as close to the centre line formed by the dowel bar and the anchor bolt as possible.
  • the result is that the spot footing has but a small internal eccentricity and the extra forces due to such eccentricity are also small, so the footing structure can be made substantially lighter.
  • This requirement can be fulfilled by implementing the protective casing as a circular, cylindrical structure with one side open, designed to transmit the forces from the pillar to the anchor bolt. Inside the circular protective casing, a circular plate is welded to the upper edge of the casing, the dowel bar of the spot footing being attached to the centre of this circular plate.
  • Part 1 shown in Figures 1 and 3, is the dowel bar of the spot footing. It is attached to the top plate 2 of the casing of the spot footing either by welding or with a screw thread. In addition to forming the dowel bar, part 1 also functions as a pillar reinforcement at the same time, and its end is provided with a screw thread for a nut joint.
  • Part 3 is the bottom plate of the spot footing. It is of a circular shape and has a central hole 7 for the anchor bolt of the floor below.
  • Part 4 forms the side wall of the protective casing for the nuts. It is a steel plate of a cylindrical shape and circular cross-section, with an opening 5 on one side for the mounting of the nut.
  • top plate 2 and the bottom plate 3 have a diameter equal to the diameter of the interior surface of the cylindrical part of the side wall, allowing the plates to be welded inside the top and bottom edges of the cylindrical part as shown in Fig. 1 - 4.
  • Part 8 is a balancing bar placed at the back corner of the spot footing and typically made of corrugated bar and attached to part 3.
  • the spot footing can be used in conjunction with wooden and precast concrete pillars, but it can also be mounted in the foundation, in which case only the threaded bars mounted inside the spot footing will protrude from the pillar.

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)
  • Foundations (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Ceramic Products (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Glass Compositions (AREA)
  • Hydrogenated Pyridines (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
EP98202944A 1997-09-08 1998-09-03 Spot footing Expired - Lifetime EP0900898B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI973622A FI104747B (fi) 1997-09-08 1997-09-08 Pilarikenkä
FI973622 1997-09-08

Publications (3)

Publication Number Publication Date
EP0900898A2 EP0900898A2 (en) 1999-03-10
EP0900898A3 EP0900898A3 (en) 2002-09-04
EP0900898B1 true EP0900898B1 (en) 2005-01-19

Family

ID=8549489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98202944A Expired - Lifetime EP0900898B1 (en) 1997-09-08 1998-09-03 Spot footing

Country Status (5)

Country Link
EP (1) EP0900898B1 (fi)
AT (1) ATE287483T1 (fi)
DE (1) DE69828667T2 (fi)
ES (1) ES2235286T3 (fi)
FI (1) FI104747B (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20020422A (fi) * 2002-03-05 2003-09-06 Tartuntamarkkinointi Oy Pilarikenkä
FI20106109A (fi) * 2010-10-26 2012-04-27 Peikko Group Oy Pilarikenkä
FI123244B (fi) * 2010-10-26 2013-01-15 Peikko Group Oy Pilarikenkä

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI941936A (fi) * 1994-04-26 1995-10-27 Teraespeikko Oy Pilarikenkä

Also Published As

Publication number Publication date
FI973622A0 (fi) 1997-09-08
ATE287483T1 (de) 2005-02-15
DE69828667T2 (de) 2006-03-16
EP0900898A3 (en) 2002-09-04
FI104747B (fi) 2000-03-31
ES2235286T3 (es) 2005-07-01
EP0900898A2 (en) 1999-03-10
DE69828667D1 (de) 2005-02-24
FI973622A (fi) 1999-03-09

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