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US3468084A - Lift slab support assembly - Google Patents

Lift slab support assembly Download PDF

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Publication number
US3468084A
US3468084A US642493A US3468084DA US3468084A US 3468084 A US3468084 A US 3468084A US 642493 A US642493 A US 642493A US 3468084D A US3468084D A US 3468084DA US 3468084 A US3468084 A US 3468084A
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US
United States
Prior art keywords
support
slab
column
opening
members
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
US642493A
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English (en)
Inventor
Franz Vaessen
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.)
Hochtief AG
Original Assignee
Hochtief AG
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 Hochtief AG filed Critical Hochtief AG
Application granted granted Critical
Publication of US3468084A publication Critical patent/US3468084A/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
    • E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
    • E04B1/3511—Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof

Definitions

  • An assembly for supporting a lift slab on a column where the slab has an opening through it so that it can be moved upwardly along the column to its support position.
  • Support brackets are integrally secured to the column and arranged thereon so that the slab will pass over the brackets when being lifted and will rest on them when in its support position.
  • a frame member forms the opening through the slab, and slotted slab support plates are attached to the frame member and extend above the support brackets when the slab is in its support position on the column.
  • a support device bears on the support brackets and supports the support plates of the frame for transferring the slab load to the column.
  • the support device has adjustable means such as wedge-like shims for accurately locating the slab in its support position, the wedge-like shims are self-locking when the slab is set in position.
  • This invention is directed to a support arrangement for a lift slab construction and, more particularly, to a support arrangement wherein an adjustable support device transfers the slab load from a support member secured to the slab to a support bracket mounted on a column.
  • each floor was constructed in its final support position whereby buildings of considerable height posed a number of problems.
  • the lifting and placing of concrete at a height above the ground is more diflicult and expensive than if performed at ground level and also involves a number of safety consideration.
  • Building the floor slab forms at ground level is simpler as are various other tasks involved in the construction of such slabs.
  • the slab is constructed so that it has a collar or frame forming the opening in the slab, and the frame is supported on a support member attached to the vertical support.
  • the support on the vertical support member or column is a strut-like or knee brace type support construction which is connected to the column by an articulated joint so that it can be moved out of the plane of the slab as the slab is moved upwardly along the column. When the slab is located in its support position, the support can then be moved into position below the slab.
  • the primary object of the present invention is to provide a support device for a lift slab which permits exact adjustment of the elevation or support position of the slab on its vertical support member.
  • Another object of the invention is to afford a support means on the vertical support member which does not interfere with the lifting of the slab into position and does not have to be moved or extended into position to support the slab.
  • Still another object of the invention is to provide a support arrangement for the slab which is simply and easily assembled and includes adjustable means for the exact elevational positioning of the slab.
  • the present invention provides an assembly of parts for supporting a lift slab in its support position on a vertical support member or column.
  • a vertical support member or column To permit the lift slab to be moved vertically from the position where it was constructed at the base of the column to its support position on the column, it is necessary to afford an opening through the slab so that it can be moved without interference along the column.
  • the opening is formed by a frame member which supplies an opening of sufficient size for the lifting operation and an adequate structure for the transfer of the slab load to the column member.
  • a support bracket is secured to carry the slab member in its support position. Additionally, slotted support plates are securely attached to the frame member. When the slab member is placed in its support position on the column, this usually requires the frame member to move past at least a portion of the support bracket, an adjustable support device is interposed between the support bracket and the support plate fitting into the slots in the plates. The support device rests on the support bracket and carries the support plates for transferring the load of the slab to the column.
  • the support bracket or seat is integrally attached to the column and is of sufficient width to provide an adequate surface to support and transfer the slab load to the column.
  • the support plates are integrally attached or welded to the frame and are also of a sufficient cross section to adequately transfer the slab load. It will be appreciated that these parts, in addition to carrying the dead load of the slab, must also be of suificient structural strength to transfer any of the live loads carried by the slab.
  • the live load on the slab can vary considerably depending on the type of use to which the floor slab is exposed.
  • the support device for transferring the slab load from the plates on the frame to the brackets on the column comprises a bar or plate member Which is supported directly on the support bracket and adjustable members, such as wedges or cotters, which are inserted into the slots in the plates.
  • the adjustable members are in supporting contact with the plates on the frame and rest on the plate member of the support device. It will be appreciated that it is easier to insert the adjustable members into the top of the slot in the plate, however, it is also possible to position them below the plate member of the support device bearing on the support bracket.
  • the adjustable members are self-locking when they are inserted into the slot. Further, because of the dimensional variations which develop during the construction of the slab and of the various parts of the support assembly, certain tolerances occur which are compensated for by the use of the adjustment members.
  • a multiple shim arrangement can be used at these locations to take up any tolerances that might be developed. It can be appreciated that the use of the adjustable members supplies a simple and easily assembled means for setting the lift slab in its exact eleva tional position. Further, since the adjustable means are inserted above the slab, no special equipment is required to place the slab in its support position.
  • FIG. 1 is a perspective view of a lift slab and support column embodying the support arrangement of the present invention
  • FIG. 2 is a sectional side view of the support arrangement shown in FIG. 1, taken along line A-A;
  • FIG. 3 is a sectional side view of the arrangement shown in FIG. 1 taken along line BB.
  • FIG. 1 there is shown a horizontally disposed lift slab 1 in its support position on a vertical column 3.
  • the lift slab is constructed at the base of the support column 3 and is provided with a cutout or opening formed by a frame member comprising a horizontally arranged fiange 4 and a vertically upstanding wall 5 which form the periphery of the opening 2.
  • a plurality of vertically arranged stiffener members 5a are secured to the flange and to the "walls 5 to provide additional support for the frame member.
  • the opening formed through the slab is of a sufiicient size to permit the slab to be lifted upwardly along the column so that its passage is not interrupted by any structure secured to the column.
  • support brackets 6 are integrally attached, as by welding, to the column.
  • the support brackets are welded to the outer edges of the column flanges, however, they could be positioned on other parts of the column surface.
  • the column shown in FIG. 1 is an I-beam structural shape, other standard or built-up structural shapes could also be used.
  • a vertically arranged plate member 7 is welded to the walls 5.
  • the plate members 7 extend above the top of the frame and have vertically extending slots 8, the upper ends of which are spaced below the upper ends of the plate members 7.
  • the support device comprises a support bar which is positioned within and extends from the slot in one of the plate members 7 across the width of the column 3 into the slot in the oppositely arranged plate member 7. Along its lower edge surface, the support bar rests on the support brackets 6. As can be seen in the drawing, the upper edge surface of the support bar 10 is spaced below the top of the slots in the plate members 7 providing an open space therebetween. Within this space adjustable support means 9 are posi tioned comprising wedge-shaped shim members which take up the difference between the top of the bar and the top of the slot.
  • the slab After the slab has been constructed, it is lifted from its position at the base of the column 3 to its support position on the column. With the slab held in position, the support bar 10 is inserted through the slots 8 in the plate members 7 and rests at its lower edge surface on the support brackets 6. Next, to establish the slot surface at its proper elevational level, the adjustable shim wedges 9 are driven into the slots 8 between the top of the support bar and the top of the slot until they are finally locked in tightly fitting position. Accordingly, the weight or load of the slab 8 is transferred through the shims 9 and the bar 10 from the plate members 7 to the support brackets 6 on the column 3. After the slab is secured in its support position, the opening 2 is filled with concrete enclosing the various elements of the support assembly and protecting them from corrosion.
  • the life slab is easily and safely supported on the support brackets 6. Since the support bracket is integrally attached to the column and does not have to be moved or repositioned when the slab is in place, the bracket overcomes the problems faced by the prior art. Additionally, the device for supporting the slab on the column is easily assembled, it assures the exact height adjustment of the slab, and it does not require any special equipment for the insertion of the support device to transfer load.
  • a support assembly comprising a horizontally arranged slab member, a frame member being secured within said slab member and forming an opening extending through said slab member, a vertically arranged column being disposed normally to said slab and extending through the opening in said slab, said column being arranged to support said slab at a predetermined support position thereon, said column being spaced within the opening inwardly from said frame member whereby the slab can be lifted upwardly along said column to its support position thereon, at least one support bracket being secured to and projecting outwardly from said column and being located within said opening inwardly from said frame member when said slab is in its support position, said support bracket having an upwardly facing generally horizontally disposed bearing surface thereon, a support plate being secured to said frame adjacent the opening through said slab and having a downwardly facing generally horizontally disposed bearing surface spaced vertically above the bearing surface on said support bracket when said slab is in its support position, an adjustable support device comprising a support element having in the support position a first surface spaced vertically below a second surface, the first surface of said
  • a support assembly as set forth in claim 1, wherein said support plate is integrally attached to said frame member and extends vertically upwardly above said frame member, said support plate having a vertically extending slotted opening through its surface, and the upper end of said slotted opening being disposed below the upper end of said support plate and forming the bearing surface on said support plate.
  • a support assembly as set forth in claim 2, wherein at least a pair of said support brackets are integrally secured to said column in spaced relationship thereon, and the pair of said support brackets each supporting the lower bearing surface of said support device.
  • a support assembly as set forth in claim 3, wherein said support element of said support device is vertically oriented and extends transversely across and is supported at its lower first surface on the pair of said support brackets, said support elements extending through the slotted openings in the pair of said support plates and having its upper second surface spaced below the upper end of the slotted openings in said support plates, and said adjustable means being positioned between and in bearing contact with the upper second surface of said support element and the upper end of the slotted openings in said support plate for transferring the load of said slab member to said support device and then to the support brackets on said column.
  • a support assembly as set forth in claim 2, wherein said frame member forms a rectangularly shaped opening and each side thereof comprises a horizontally disposed flange secured to said slab, an upright wall secured to said slab and to said flange and extending upwardly from said flange, the edge of said flange and the surface of said wall facing inwardly toward the opening on each side of said frame forming the periphery of the opening through said slab member, and a plurality of stiffener members on each side of said frame, said stiffener members being attached to said flange and to said wall on the opposite side thereof from the side forming the periphery of the opening through said slab.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US642493A 1966-07-23 1967-05-31 Lift slab support assembly Expired - Lifetime US3468084A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH0060056 1966-07-23

Publications (1)

Publication Number Publication Date
US3468084A true US3468084A (en) 1969-09-23

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ID=7160791

Family Applications (1)

Application Number Title Priority Date Filing Date
US642493A Expired - Lifetime US3468084A (en) 1966-07-23 1967-05-31 Lift slab support assembly

Country Status (7)

Country Link
US (1) US3468084A (xx)
BE (1) BE701297A (xx)
DE (1) DE1684266B1 (xx)
DK (1) DK125033B (xx)
GB (1) GB1155915A (xx)
NL (1) NL6708095A (xx)
SE (1) SE333454B (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6354048B1 (en) * 1998-07-15 2002-03-12 British Aerospace Plc Flexible manufacturing systems apparatus and methods
US6684577B2 (en) 2000-11-22 2004-02-03 Mark Dimitrijevic Support system for lifting and leveling existing buildings that utilizes non-cylindrical support sections and a vertically-adjustable cap that enables the building to be easily raised or lowered to a desired height
US6705053B2 (en) * 2000-11-22 2004-03-16 Mark Dimitrijevic Method and apparatus for utilizing non-cylindrical support sections to lift and level existing buildings from a location underneath the buildings
US6763636B2 (en) 2001-03-06 2004-07-20 Mark Dimitrijevic Method and apparatus for stabilizing a support system utilized for lifting and leveling existing buildings
US20060048471A1 (en) * 2004-09-06 2006-03-09 Research Institute Of Industrial Science & Technology Strengthening device to increase strength of grout layer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863313A (en) * 1955-04-13 1958-12-09 Philip N Youtz Lift-slab floor-to-column connector
US2930220A (en) * 1955-05-31 1960-03-29 Us Lift Slab Corp Anchoring structure for building slabs
US3199259A (en) * 1961-12-15 1965-08-10 Long Marshall Anchoring structure for building slabs

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1042871B (de) * 1953-05-15 1958-11-06 Jean Fayeton Gebaeude, bei welchem erst die Stuetzen errichtet und dann am Boden die Decken-platten hergestellt und in ihre endgueltige Lage hochgezogen werden
US3028707A (en) * 1959-03-13 1962-04-10 Sagalovitch Wolfe Method of building construction
GB892438A (en) * 1960-04-19 1962-03-28 Internat Lift Slab Corp Securing means for multi-storey concrete buildings erected on the 'lift-slab' principle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863313A (en) * 1955-04-13 1958-12-09 Philip N Youtz Lift-slab floor-to-column connector
US2930220A (en) * 1955-05-31 1960-03-29 Us Lift Slab Corp Anchoring structure for building slabs
US3199259A (en) * 1961-12-15 1965-08-10 Long Marshall Anchoring structure for building slabs

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6354048B1 (en) * 1998-07-15 2002-03-12 British Aerospace Plc Flexible manufacturing systems apparatus and methods
US6684577B2 (en) 2000-11-22 2004-02-03 Mark Dimitrijevic Support system for lifting and leveling existing buildings that utilizes non-cylindrical support sections and a vertically-adjustable cap that enables the building to be easily raised or lowered to a desired height
US6705053B2 (en) * 2000-11-22 2004-03-16 Mark Dimitrijevic Method and apparatus for utilizing non-cylindrical support sections to lift and level existing buildings from a location underneath the buildings
US6763636B2 (en) 2001-03-06 2004-07-20 Mark Dimitrijevic Method and apparatus for stabilizing a support system utilized for lifting and leveling existing buildings
US20060048471A1 (en) * 2004-09-06 2006-03-09 Research Institute Of Industrial Science & Technology Strengthening device to increase strength of grout layer
US7721494B2 (en) * 2004-09-06 2010-05-25 Research Institute Of Industrial Science & Technology Strengthening device to increase strength of grout layer

Also Published As

Publication number Publication date
SE333454B (xx) 1971-03-15
DK125033B (da) 1972-12-18
BE701297A (xx) 1967-12-18
GB1155915A (en) 1969-06-25
NL6708095A (xx) 1968-01-24
DE1684266B1 (de) 1971-01-28

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