US3355853A - Method of building construction - Google Patents

Method of building construction Download PDF

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Publication number
US3355853A
US3355853A US434235A US43423565A US3355853A US 3355853 A US3355853 A US 3355853A US 434235 A US434235 A US 434235A US 43423565 A US43423565 A US 43423565A US 3355853 A US3355853 A US 3355853A
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US
United States
Prior art keywords
slab
roof
supporting members
roof slab
forms
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
US434235A
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English (en)
Inventor
John D Wallace
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.)
Intermountain Lift Slab Corp
Original Assignee
Intermountain Lift Slab Corp
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 Intermountain Lift Slab Corp filed Critical Intermountain Lift Slab Corp
Priority to US434235A priority Critical patent/US3355853A/en
Priority to GB30506/65A priority patent/GB1074272A/en
Priority to SE9610/65A priority patent/SE322888B/xx
Priority to ES0315815A priority patent/ES315815A1/es
Priority to DK384965AA priority patent/DK122082B/da
Priority to DE19651559005 priority patent/DE1559005C/de
Priority to BE668155D priority patent/BE668155A/xx
Priority to LU49325A priority patent/LU49325A1/xx
Priority to FR29534A priority patent/FR1453523A/fr
Priority to CH1232965A priority patent/CH426165A/de
Priority to NL656512154A priority patent/NL141265B/xx
Application granted granted Critical
Publication of US3355853A publication Critical patent/US3355853A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/20—Movable forms; Movable forms for moulding cylindrical, conical or hyperbolical structures; Templates serving as forms for positioning blocks or the like
    • E04G11/22—Sliding forms raised continuously or step-by-step and being in contact with the poured concrete during raising and which are not anchored in the hardened concrete; Arrangements of lifting means therefor

Definitions

  • ABSTRACT OF THE DISCLOSURE A method of building construction, wherein grade floor and ceiling slabs of a building are preformed, as required, and the vertical wall components of the building are constructed simultaneously with lifting of the ceiling slabs to its final raised position.
  • This invention relates to building construction and especially to the placing of floors and ceilings of buildings and to the erection of vertically extending structural components such as shafts for elevators, heating, air conditioning, stairwells, walls and the like.
  • jacks positioned on the tops of preformed columns can be used to raise the slabs into position after they obtain a suitable hardness.
  • openings are blocked out in the floor slabs through which walls for vertically extending structural components, such as elevator shafts, heating and air conditioning ducts, etc., are constructed after the slabs have been raised and fixed in position on the columns, or the vertically extending structural ⁇ components are constructed using a slip-form process wherein jacks are positioned on reinforcement rods to slowly raise a form into which concrete is placed, the forms being removed and the concrete being removed and the concrete being allowed to attain its final strength set before the slabs are raised.
  • It is a principal object of the present invention t( provide a method of building construction that result: in faster construction, that is safer to use than those known heretofore, and that results in substantial saving: in construction costs.
  • FIG. 1 is an isometric view illustrating the initial steps of one embodiment of the method of the invention
  • FIGS. 2-7 are schematic illustrations of subsequent steps in such embodiment of the method.
  • FIG. 8 is another isometric view similar to that of FIG. l, but illustrating the initial steps of another embodiment of the method of the invention.
  • a level grade slab 10 is poured around support columns 11 that are preferably set in footings 12 beneath the grade slab. Additional floor slabs 13 and 14 and a roof slab 15 are puored in place, one above the other, on top of grade slab 10, with only a thin layer of some bond-preventing material 151, such as a silicon base spray compound known as Thompson Water Seal manufactured commercially by the IE. A. Thompson Co. of San Francisco, Calif., interposed between slabs to keep them from adhering to one another.
  • some bond-preventing material 151 such as a silicon base spray compound known as Thompson Water Seal manufactured commercially by the IE. A. Thompson Co. of San Francisco, Calif.
  • a lifht jack 16 and support structure therefore, shown generally at 17, are positioned on each support column 11. Correlated action of the jacks will raise the slabs to their required elevation, all in the conventional manner disclosed by the aforementioned U.S. Patent No. 2,720,017.
  • Inner and outer forms for concrete to be poured are Jrovided for each vertical wall to be constructed, and :hese forms are carried by the roof slab in such a nanner that they extend upwardly from the slab, with :heir weight distributed evenly over a broad area thereof, so that such slab will not fail under the loading.
  • the outer forms 20 are of concrete and :xtend upwardly from and integral with the roof slab.
  • hese concrete outer forms are constructed with the use )f conventional forms of wood, metal or other suitable material at the time the roof slab is poured.
  • a pair of beams 21 and 22 extend across opposing outer forms and support the inner wall forms 23, holding them a spaced distance from the forms 20 so that concrete :an be placed between them.
  • the outer forms act as Atransfer beams to distribute the weight of the cross beams-and of any load carried there- Jy-around the entire edge of the opening 18, and also to allow the vertical walls of the elevator shaft 18-1 to be formed in close proximity to the surrounding slabs, so that permanent attachments are easily made after the slabs have been raised to their final elevation.
  • the outer forms 20 integral with roof slab 15, it is a relatively simple matter to lift out the suspended inner wall forms and the finishers platform hung below the inner wall forms. This allows easy insertion into the shaft of preformed stairs or other preformed structures not shown. Furthermore, after the roof slab has been moved to its final position the upstanding outer forms provide the walls for housing on top of the building, through which the roof becomes easily accessible in the finished building. This upstanding housing is readily faced with bricks, as shown at 26 in FIG. 7, to provide an attractive finished appearance, and is bonded to the vertical walls to increase the rigidity and strength of the building.
  • the same lift pattern disclosed in the aforementioned U.S. Patent No. 2,720,017 is desirably employed to raise the slabs.
  • the roof slab and iioor slab 14 are both raised to temporary resting positions above the nal position of lioor slab 13, which is then raised to its final position where it is permanently attached to the support columns 11, as shown in FIG. 4.
  • the height of the support columns 11 is increased by welding on extensions 11a and the top slab is moved up to another temporary rest position, shown in FIG. 5.
  • the lioor slab 14 is then moved to its linal position, FIG. 6, where it is attached to the support columns.
  • Roof slab 15 is moved to its final position, FIG. 7, and is permanently fixed to the support columns 11a.
  • the inside forms and finishers platform are lifted out, using conventional crane or other hoisting apparatus, not shown, and as they are raised workers on the platform 25 cornplete nishing of the concrete walls.
  • the roof slab serves as a safe, spacious, working platform for men and equipment as the vertical components are poured, the reinforcing steel is placed, and the slabs are permanently fixed to the support columns. No scaffolding is normally required.
  • the weight of the inner and outer forms required to form the vertical walls in place can be distributed over a large area of the roof slab in the manner shown in FIG. 8. 1n this arrangement beams 30 and 31 are spaced apart and positioned to surround the opening 18. Upright posts 32 are positioned on top of beams 30 and 31, and suspension beams 33 and 34 are positioned to extend over opening 18 and to rest on the top of each opposing pair of upright posts. Both the inner and outer forms, 35 and 36 respectively, for the vertical walls are suspended from the beams 33 and 34 and the forms are raised with slab 15 in the same manner as are the inner and outer forms 20 and 23, previously described.
  • a method of building construction which cornprises the steps of erecting a plurality of vertical supporting members for a building, secured adjacent their lowerrnost ends to a foundation support;
  • a method of building construction which comprises the steps of erecting a plurality of vertical supporting members for a building secured adjacent their lowermost ends to a foundation support;
  • each of the suplifting said roof slab vertically tot a position above thi permanent position of the floor slab while maintain ing said roof slab in sliding engagement with eacl of the supporting members; lifting said oor slab vertically to its permanent posi tion while maintaining it in sliding engagement witl the supporting members and fixing the floor slab tc the supporting members at its permanent position continuing upward movement of" the roof slab to its permanent position and then fixing it to the supporting members;
  • step of erecting outer wall forms includes constructing the outer wall forms integral with the roof slab; and including the step of bonding the vertically extending structural components to the outer wall forms after said roof slab has ybeen set in its permanent position.
  • step of erecting the inner wall form includes the step of providing a removable support means on said roof slab to support said inner wall form.
  • the method of claim 3, including the step of constructing a plurality of monolithic iloor sla-bs with a layer of separating material therebetween, one on top of the other between the grade and roof slab; and wherein the step of lifting the oor slab vertically includes moving each oor slab individually to a position above the final position of the one to be permanently connected and temporarily holding said slabs while the slab to be secured is permanently fixed to the vertical supports, sequentially lixing each oor sla'b in a similar manner and connecting the roof slab permanently after all the iioor slabs are fixed to the vertical support.
  • FRANK L. ABBOTT Primary Examiner. M, O. WARNECKE, Assistant Examiner.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
US434235A 1965-02-23 1965-02-23 Method of building construction Expired - Lifetime US3355853A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US434235A US3355853A (en) 1965-02-23 1965-02-23 Method of building construction
GB30506/65A GB1074272A (en) 1965-02-23 1965-07-19 Method of building construction
SE9610/65A SE322888B (US07488766-20090210-C00029.png) 1965-02-23 1965-07-21
ES0315815A ES315815A1 (es) 1965-02-23 1965-07-26 Un metodo de construccion de edificios.
DK384965AA DK122082B (da) 1965-02-23 1965-07-26 Fremgangsmåde til opførelse af et bygningsskelet.
DE19651559005 DE1559005C (de) 1965-02-23 1965-08-10 Verfahren zum Errichten von Gebäuden nach der Hubplattenbauweise sowie auf der obersten Deckenplatte angeordnete Schalungsform zur Durchführung des Verfahrens
BE668155D BE668155A (US07488766-20090210-C00029.png) 1965-02-23 1965-08-11
LU49325A LU49325A1 (US07488766-20090210-C00029.png) 1965-02-23 1965-08-13
FR29534A FR1453523A (fr) 1965-02-23 1965-08-26 Procédé de construction de bâtiments par dalles à élévation successive
CH1232965A CH426165A (de) 1965-02-23 1965-09-03 Verfahren zum Bau eines Gebäudes
NL656512154A NL141265B (nl) 1965-02-23 1965-09-17 Werkwijze voor het optrekken van een gebouw.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US434235A US3355853A (en) 1965-02-23 1965-02-23 Method of building construction

Publications (1)

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US3355853A true US3355853A (en) 1967-12-05

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US434235A Expired - Lifetime US3355853A (en) 1965-02-23 1965-02-23 Method of building construction

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US (1) US3355853A (US07488766-20090210-C00029.png)
BE (1) BE668155A (US07488766-20090210-C00029.png)
CH (1) CH426165A (US07488766-20090210-C00029.png)
DK (1) DK122082B (US07488766-20090210-C00029.png)
ES (1) ES315815A1 (US07488766-20090210-C00029.png)
FR (1) FR1453523A (US07488766-20090210-C00029.png)
GB (1) GB1074272A (US07488766-20090210-C00029.png)
LU (1) LU49325A1 (US07488766-20090210-C00029.png)
NL (1) NL141265B (US07488766-20090210-C00029.png)
SE (1) SE322888B (US07488766-20090210-C00029.png)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206162A (en) * 1978-10-03 1980-06-03 Vanderklaauw Peter M Method for constructing concrete enclosures by combination of liftplate-slipform method
US4359795A (en) * 1979-11-27 1982-11-23 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Bridge piers
US4455270A (en) * 1980-12-03 1984-06-19 Rene Alejandro O'Cadiz-Castaneda Construction process including slab sliding support and comprising simultaneous wall erection
US4875314A (en) * 1987-01-06 1989-10-24 Boilen Kenneth T Connection system for preventing uplift of shear walls
WO1998015696A1 (fr) * 1996-10-07 1998-04-16 Genghou Deng Procede servant a deplacer une structure du haut vers le bas
US6151851A (en) * 1999-10-29 2000-11-28 Carter; Michael M. Stackable support column system and method for multistory building construction
WO2001007731A1 (de) * 1999-07-23 2001-02-01 Ed. Züblin Ag Verfahren zur herstellung von türmen grosser höhe und grossen durchmessers in gleitschalung
US20050115164A1 (en) * 2002-04-18 2005-06-02 Han Bong K. Construction method for src structured high rise building
US20060010825A1 (en) * 2003-05-09 2006-01-19 Nci Building Systems, L.P. Multi-story building and method for construction thereof
US20120023840A1 (en) * 2009-04-10 2012-02-02 Bin Yuan Main Work Construction Method for Reinforced Concrete Building and Building Construction Machine
US10190309B2 (en) * 2010-06-08 2019-01-29 Innovative Building Technologies, Llc Slab construction system and method for constructing multi-story buildings using pre-manufactured structures
US10323428B2 (en) 2017-05-12 2019-06-18 Innovative Building Technologies, Llc Sequence for constructing a building from prefabricated components
US10487493B2 (en) 2017-05-12 2019-11-26 Innovative Building Technologies, Llc Building design and construction using prefabricated components
US10508442B2 (en) 2016-03-07 2019-12-17 Innovative Building Technologies, Llc Floor and ceiling panel for slab-free floor system of a building
US10508432B2 (en) * 2018-04-24 2019-12-17 Ss-20 Building Systems, Inc. Connection for stacking post system for multistory building construction
US10676923B2 (en) 2016-03-07 2020-06-09 Innovative Building Technologies, Llc Waterproofing assemblies and prefabricated wall panels including the same
US10724228B2 (en) 2017-05-12 2020-07-28 Innovative Building Technologies, Llc Building assemblies and methods for constructing a building using pre-assembled floor-ceiling panels and walls
US10753080B1 (en) * 2019-03-29 2020-08-25 Big Time Investment, Llc Method of constructing a building, and a building construction system therefor
US10900224B2 (en) 2016-03-07 2021-01-26 Innovative Building Technologies, Llc Prefabricated demising wall with external conduit engagement features
US10961710B2 (en) 2016-03-07 2021-03-30 Innovative Building Technologies, Llc Pre-assembled wall panel for utility installation
US10975590B2 (en) 2014-08-30 2021-04-13 Innovative Building Technologies, Llc Diaphragm to lateral support coupling in a structure
US11054148B2 (en) 2014-08-30 2021-07-06 Innovative Building Technologies, Llc Heated floor and ceiling panel with a corrugated layer for modular use in buildings
US11060286B2 (en) 2014-08-30 2021-07-13 Innovative Building Technologies, Llc Prefabricated wall panel for utility installation
US11098475B2 (en) 2017-05-12 2021-08-24 Innovative Building Technologies, Llc Building system with a diaphragm provided by pre-fabricated floor panels
US11326340B2 (en) * 2020-08-10 2022-05-10 Hunan No. 6 Engineering Co. Ltd. Steel tube supporting construction structure for beam transfer floor in high-rise building and construction method therefor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2117737B1 (US07488766-20090210-C00029.png) * 1970-12-11 1974-02-15 Entreprises Soc Gle
ATE8682T1 (de) * 1979-11-07 1984-08-15 Francois Neuckens Verfahren zur konstruktion von haeusern.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1066436A (en) * 1913-07-01 Albert Peltzer Method for constructing concrete buildings.
US2217115A (en) * 1937-07-17 1940-10-08 Hermodsson Carl Harald Method of building houses
US2720017A (en) * 1948-11-30 1955-10-11 Inst Of Inventive Res Method of erecting buildings
FR1168156A (fr) * 1955-12-14 1958-12-04 Produktionsmetoder Ab Procédé et dispositifs pour la construction de bâtiments et d'immeubles
US3053015A (en) * 1959-06-26 1962-09-11 George T Graham Method of building construction
US3275719A (en) * 1963-08-07 1966-09-27 Brian H Dudson Method of building in situ construction using sequential molding techniques

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1066436A (en) * 1913-07-01 Albert Peltzer Method for constructing concrete buildings.
US2217115A (en) * 1937-07-17 1940-10-08 Hermodsson Carl Harald Method of building houses
US2720017A (en) * 1948-11-30 1955-10-11 Inst Of Inventive Res Method of erecting buildings
FR1168156A (fr) * 1955-12-14 1958-12-04 Produktionsmetoder Ab Procédé et dispositifs pour la construction de bâtiments et d'immeubles
US3053015A (en) * 1959-06-26 1962-09-11 George T Graham Method of building construction
US3275719A (en) * 1963-08-07 1966-09-27 Brian H Dudson Method of building in situ construction using sequential molding techniques

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4206162A (en) * 1978-10-03 1980-06-03 Vanderklaauw Peter M Method for constructing concrete enclosures by combination of liftplate-slipform method
US4359795A (en) * 1979-11-27 1982-11-23 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Bridge piers
US4455270A (en) * 1980-12-03 1984-06-19 Rene Alejandro O'Cadiz-Castaneda Construction process including slab sliding support and comprising simultaneous wall erection
US4875314A (en) * 1987-01-06 1989-10-24 Boilen Kenneth T Connection system for preventing uplift of shear walls
WO1998015696A1 (fr) * 1996-10-07 1998-04-16 Genghou Deng Procede servant a deplacer une structure du haut vers le bas
ES2259850A1 (es) * 1999-07-23 2006-10-16 Ed. Zublin Ag Procedimiento para la construccion de torres de gran altura y gran diametro mediante encofrado deslizante, y dispositivo de encofrado.
WO2001007731A1 (de) * 1999-07-23 2001-02-01 Ed. Züblin Ag Verfahren zur herstellung von türmen grosser höhe und grossen durchmessers in gleitschalung
US6151851A (en) * 1999-10-29 2000-11-28 Carter; Michael M. Stackable support column system and method for multistory building construction
US20050115164A1 (en) * 2002-04-18 2005-06-02 Han Bong K. Construction method for src structured high rise building
US7647742B2 (en) * 2002-04-18 2010-01-19 Bong Kil Han Construction method for SRC structured high rise building
US9447573B2 (en) 2003-05-09 2016-09-20 Nci Group, Inc. Multi-story building and method for construction thereof
US20060010825A1 (en) * 2003-05-09 2006-01-19 Nci Building Systems, L.P. Multi-story building and method for construction thereof
US7007431B2 (en) 2003-05-09 2006-03-07 Nci Building Systems, Lp Multi-story building and method for construction thereof
US20120023840A1 (en) * 2009-04-10 2012-02-02 Bin Yuan Main Work Construction Method for Reinforced Concrete Building and Building Construction Machine
US8863474B2 (en) * 2009-04-10 2014-10-21 Bin Yuan Main work construction method for reinforced concrete building and building construction machine
US10190309B2 (en) * 2010-06-08 2019-01-29 Innovative Building Technologies, Llc Slab construction system and method for constructing multi-story buildings using pre-manufactured structures
US11060286B2 (en) 2014-08-30 2021-07-13 Innovative Building Technologies, Llc Prefabricated wall panel for utility installation
US11054148B2 (en) 2014-08-30 2021-07-06 Innovative Building Technologies, Llc Heated floor and ceiling panel with a corrugated layer for modular use in buildings
US10975590B2 (en) 2014-08-30 2021-04-13 Innovative Building Technologies, Llc Diaphragm to lateral support coupling in a structure
US10900224B2 (en) 2016-03-07 2021-01-26 Innovative Building Technologies, Llc Prefabricated demising wall with external conduit engagement features
US10508442B2 (en) 2016-03-07 2019-12-17 Innovative Building Technologies, Llc Floor and ceiling panel for slab-free floor system of a building
US10676923B2 (en) 2016-03-07 2020-06-09 Innovative Building Technologies, Llc Waterproofing assemblies and prefabricated wall panels including the same
US10961710B2 (en) 2016-03-07 2021-03-30 Innovative Building Technologies, Llc Pre-assembled wall panel for utility installation
US10323428B2 (en) 2017-05-12 2019-06-18 Innovative Building Technologies, Llc Sequence for constructing a building from prefabricated components
US10724228B2 (en) 2017-05-12 2020-07-28 Innovative Building Technologies, Llc Building assemblies and methods for constructing a building using pre-assembled floor-ceiling panels and walls
US10487493B2 (en) 2017-05-12 2019-11-26 Innovative Building Technologies, Llc Building design and construction using prefabricated components
US11098475B2 (en) 2017-05-12 2021-08-24 Innovative Building Technologies, Llc Building system with a diaphragm provided by pre-fabricated floor panels
US10508432B2 (en) * 2018-04-24 2019-12-17 Ss-20 Building Systems, Inc. Connection for stacking post system for multistory building construction
US10753080B1 (en) * 2019-03-29 2020-08-25 Big Time Investment, Llc Method of constructing a building, and a building construction system therefor
US11274432B2 (en) 2019-03-29 2022-03-15 Big Time Investment, Llc Method of constructing a building, and a building construction system therefor
US11326340B2 (en) * 2020-08-10 2022-05-10 Hunan No. 6 Engineering Co. Ltd. Steel tube supporting construction structure for beam transfer floor in high-rise building and construction method therefor

Also Published As

Publication number Publication date
CH426165A (de) 1966-12-15
NL141265B (nl) 1974-02-15
ES315815A1 (es) 1966-03-01
BE668155A (US07488766-20090210-C00029.png) 1965-12-01
FR1453523A (fr) 1966-06-03
LU49325A1 (US07488766-20090210-C00029.png) 1965-10-13
DE1559005A1 (de) 1969-09-11
NL6512154A (US07488766-20090210-C00029.png) 1966-08-24
SE322888B (US07488766-20090210-C00029.png) 1970-04-20
GB1074272A (en) 1967-07-05
DK122082B (da) 1972-01-17

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