EP0628669A1 - Mauerwerksanker - Google Patents

Mauerwerksanker Download PDF

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Publication number
EP0628669A1
EP0628669A1 EP94303604A EP94303604A EP0628669A1 EP 0628669 A1 EP0628669 A1 EP 0628669A1 EP 94303604 A EP94303604 A EP 94303604A EP 94303604 A EP94303604 A EP 94303604A EP 0628669 A1 EP0628669 A1 EP 0628669A1
Authority
EP
European Patent Office
Prior art keywords
tie
wall
wall tie
region
mortar course
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.)
Granted
Application number
EP94303604A
Other languages
English (en)
French (fr)
Other versions
EP0628669B1 (de
Inventor
Roy John Burns
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.)
Voestalpine Metsec PLC
Original Assignee
Voestalpine Metsec PLC
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 Voestalpine Metsec PLC filed Critical Voestalpine Metsec PLC
Publication of EP0628669A1 publication Critical patent/EP0628669A1/de
Application granted granted Critical
Publication of EP0628669B1 publication Critical patent/EP0628669B1/de
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
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4178—Masonry wall ties

Definitions

  • This invention relates to a wall tie for securing a brick or block built wall to a support structure, for example for securing one leaf of a cavity wall construction to the other leaf thereof.
  • Wall ties are generally arranged to be embedded in the mortar course positioned between the courses of bricks or other building blocks used in the construction of a cavity wall in order to secure the tie to the construction.
  • One common problem with many known wall ties is that if they are subject to forces tending to withdraw the tie from between courses of the wall, the resistance to such a force is relatively low, and movement of the wall tie occurs, followed by fracture of the mortar course.
  • a wall tie including, in a region to be received within a mortar course, a surface angled to the plane of the mortar course in which it is to be embedded in such a direction that the application of a force to the tie to move the tie in the mortar course in the direction of the length of the tie results in a wedging action tending to separate the brick or block courses above and below the tie so that such movement is resisted inter alia by the weight of that part of the wall above the wall tie acting thereon, characterized in that the wall tie is provided with a longitudinal fold defining a region of generally V-shaped cross-section of depth increasing from a minimum adjacent the centre region of the wall tie, the V-shaped region defining the angled surface.
  • the wall tie preferably comprises a shaped metal strip, preferably a stainless steel strip.
  • the wall tie preferably has an inverted W-shaped cross-section in the region of the angled surface.
  • the wall tie may include a generally flat region to facilitate manual bending allowing vertical adjustment of the wall tie.
  • the wall tie preferably further includes an upstanding wall extending generally perpendicularly to the length of the wall tie.
  • the upstanding wall subtends an angle of 85 to 90° with the horizontal, in use.
  • the upstanding wall defines part of the boundary of an aperture provided in the wall tie.
  • the wall tie of Figures 1 and 2 is formed using progression tooling from an elongate strip 10 of stainless steel, although for some applications galvanised steel and mild steel may be suitable materials.
  • the tie is approximately 200 mm in length and 20 mm in width at its widest point.
  • the tie is intended for linking two parallel leaves of brick or block of a cavity wall and so the tie is symmetrical about its transverse centreline.
  • a region 12 of length approximately 25 mm at the centre of the wall tie is folded about the longitudinal centre line of the base strip so as to take an inverted V-section form the apex of which is rounded.
  • the apex of the fold is deformed downwardly to provide two apices 16, the strip assuming an inverted 'W' cross-section the depth and width of the central 'V' of which increases progressively towards the respective end of the tie.
  • the apices 16 of each half of the tie diverge from their common start point to maximum spacing adjacent the respective end of the tie. It will be recognised that the provision of longitudinal folds increases the rigidity of the wall tie.
  • the lower faces 17 a of the 'V' 17 of each inverted 'W' region are thus inclined to both the vertical and the horizontal (assuming that the tie is positioned horizontally) as, correspondingly, are the upper faces 17 b of the 'V' of each inverted 'W' region. It will be recognised therefore that any attempt to withdraw the embedded inverted 'W' region of the tie from between the courses of the wall would generate a two-fold wedging action at the upper and lower faces of the 'V' 17 tending firstly to drive the upper and lower courses of bricks or block apart against the weight of the wall above, and secondly to split the mortar course laterally displacing solid mortar in the plane of the mortar course against the resistance of the remainder of the mortar course.
  • Each end of the wall tie is provided with an elongate aperture 20 the outer end margin of which is bent to define an upstanding wall 22 which, in use, preferably extends at 85 to 90° to the horizontal, the upstanding wall 22 extending generally perpendicular to the length of the wall tie.
  • each wall tie In use, during construction of a cavity wall, a first end of each wall tie is positioned in the mortar provided on top of a first course of bricks or other building blocks of a first leaf of the wall before a second course is provided thereon, the mortar extending through the elongate aperture 20.
  • the apices 16 of each inverted 'W' region extend generally horizontally.
  • the opposite end of each wall tie extends into the mortar provided between courses of bricks or other building blocks of the other leaf in a similar manner.
  • the wall tie further includes a second aperture 24 provided at each end thereof.
  • the apertures 24 are provided for the purpose of positioning the wall tie during the progression tooling process. However, in use, mortar will extend through the apertures 24 and so they may further act to resist movement of the wall tie in the mortar course.
  • the centre region 12 of the wall tie is stamped to provide three parallel ribs 26 which, in use, act as drip points defining a water barrier to prevent water from crossing the cavity of the wall. Additionally the ribs 26 enhance the rigidity of the region 12.
  • FIG. 3 and 4 includes an end similar to the ends of the wall tie described above in relation to Figures 1 and 2, and a second end including a pair of grooves 30 arranged to receive the inturned edges of a generally C-shaped elongate member 32 embedded in a vertical orientation in the face of a cast concrete pillar 34 or other support structure.
  • the wall tie is attached to the C-shaped member 32 by inserting the second end of the wall tie into the groove thereof, and then rotating the wall tie by approximately 90°.
  • the first end of the wall tie is then positioned in the mortar between courses of bricks or other building blocks during construction of that leaf of the wall, as described above.
  • the wedge shaping of the end region of the tie is received within a corresponding re-entrant wedge shaping of a metal channel and the grooves 30 are dispensed with.
  • Figures 5 and 6 includes end regions 40 of similar form the inverted 'W' regions described above but with the apertures 20 omitted and the function of the walls 22 performed by downturned end wall 48.
  • the 'V' formation with the horizontally and vertically inclined faces assumes greater prominence than the inverted 'W' aspect, the inverted 'W'-section including narrow lips 44 which enhance the rigidity of the tie.
  • each 'W'-section region 40 is spaced from an inverted V-section central region 46 by a generally flat region 42 which facilitates bending, if desired, to adjust the wall tie so as to be suitable for use in situations in which the courses of bricks or other building blocks used in the leaves of the cavity wall do not align horizontally.
  • this feature could be incorporated in the design of Figures 1 and 2 if desired.
  • the wall tie of the third embodiment includes an upstanding wall 48 performing the function of the wall 22 of the embodiment in Figures 1 and 2, but does not include the elongate aperture 20. If desired, the wall tie of the third embodiment may be provided with an elongate aperture through the mortar course would extend, but as an alternative the tie may be provided with a plurality of small apertures through which the mortar extends, in use.
  • the wall tie further includes a pressed rib 50 forming a water barrier as described above in relation to Figures 1 and 2.
  • the U or rounded V-shape in cross-section of the central region of the tie ensures that the tie has good strength in compression and the overall configuration of each embodiment produces a strong and effective tie utilizing a minimum of material so as to optimise cost efficiency, in relation to conventional ties of comparable strength.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Finishing Walls (AREA)
EP19940303604 1993-05-20 1994-05-20 Mauerwerksanker Expired - Lifetime EP0628669B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB939310377A GB9310377D0 (en) 1993-05-20 1993-05-20 Wall tic
GB9310377 1993-05-20

Publications (2)

Publication Number Publication Date
EP0628669A1 true EP0628669A1 (de) 1994-12-14
EP0628669B1 EP0628669B1 (de) 2000-03-22

Family

ID=10735798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940303604 Expired - Lifetime EP0628669B1 (de) 1993-05-20 1994-05-20 Mauerwerksanker

Country Status (3)

Country Link
EP (1) EP0628669B1 (de)
DE (1) DE69423538D1 (de)
GB (1) GB9310377D0 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2010354A (en) * 1977-12-15 1979-06-27 Curran G Wall Ties For Cavity Walls
GB2210395A (en) * 1987-09-23 1989-06-07 Andrew Timothy Rouston Wall tie for joining new walls to old walls
GB2260348A (en) * 1991-05-01 1993-04-14 Ancon Stainless Steel Fixings Wall tie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2010354A (en) * 1977-12-15 1979-06-27 Curran G Wall Ties For Cavity Walls
GB2210395A (en) * 1987-09-23 1989-06-07 Andrew Timothy Rouston Wall tie for joining new walls to old walls
GB2260348A (en) * 1991-05-01 1993-04-14 Ancon Stainless Steel Fixings Wall tie

Also Published As

Publication number Publication date
GB9310377D0 (en) 1993-07-07
DE69423538D1 (de) 2000-04-27
EP0628669B1 (de) 2000-03-22

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