US20040200668A1 - Scaffolding system - Google Patents
Scaffolding system Download PDFInfo
- Publication number
- US20040200668A1 US20040200668A1 US10/412,329 US41232903A US2004200668A1 US 20040200668 A1 US20040200668 A1 US 20040200668A1 US 41232903 A US41232903 A US 41232903A US 2004200668 A1 US2004200668 A1 US 2004200668A1
- Authority
- US
- United States
- Prior art keywords
- level
- trusses
- guard rails
- pair
- platform
- 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.)
- Abandoned
Links
- 238000010276 construction Methods 0.000 claims abstract description 9
- 230000005484 gravity Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/14—Railings
-
- 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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/10—Steps or ladders specially adapted for scaffolds
-
- 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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/14—Railings
- E04G5/147—Railings specially adapted for mounting prior to the mounting of the platform
-
- 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
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
- E04G2001/155—Platforms with an access hatch for getting through from one level to another
Abstract
A multi-level construction scaffold comprises a pair of H-shaped end frames spaced by horizontal guard rails. The guard rails are pivotally connected at opposed ends thereof to the end frame members, thereby allowing the guard rails to pivot in parallel when one of the frame member is lifted relative to the other. Each end frame includes a pair of uprights interconnected by a horizontal platform support located at a distance below the guard rails engaged with the end frames. In this way, the safety guard rails of a next level to be erected can be installed directly from the underlying level.
Description
- 1. Field of the Invention
- The present invention relates to scaffolding of the type used in the construction of buildings and, more particularly, to scaffolding assemblies wherein safety guards of an upper floor level can be installed from an underlying floor level.
- 2. Description of the Prior Art
- Temporary scaffolds are often erected alongside of buildings to enable work to be done on the building's exterior. Such construction scaffolds typically comprise a pair of inverted U-shaped lower trusses for supporting a work platform and a pair of similar upper trusses above the platform and having a plurality of guard rail posts supporting a plurality of horizontal safety guard rails for protecting operators from falling from the platform. With this type of arrangement wherein the platform is installed at the upper end of the lower trusses and the associated guard rails are mounted to the trusses of the next scaffolding level, it is not possible to install the guard rails of a given level before accessing the platform of this level. There is thus a risk that the operator falls from the platform while erecting the scaffold. Consequently, regulations requiring that the operator be strapped to the structure while building up the scaffold have been imposed. Despite the regulations and the relatively high risk of accidents, the operators often do not strap themselves to the scaffolding structure.
- There is thus a need for a new scaffolding system wherein the safety guard rails of a scaffold which is being erected can be installed from the already erected underlying scaffolding level so that the operator stepping on the next floor level will be already protected from falling by the pre-installed guard rails.
- It is therefore an aim of the present invention to provide a new scaffolding system in which the guard rails of a next scaffolding level to be erected can be installed from an underlying level.
- It is also an aim of the present invention to provide a method by which a scaffold can be erected in a safe and simple way.
- Therefore, in accordance with the present invention, there is provided a scaffold of the type used in the construction of buildings, comprising a first work platform supported at opposed ends thereof by a first pair of trusses, each of said trusses having a pair of uprights having top and bottom ends, said uprights being interconnected by a work platform support extending horizontally between said uprights at a location intermediate the top and bottom ends thereof, and connections on said uprights above said work platform support for pivotally connecting at least one guard rail to said first pair of trusses above said first work platform.
- In accordance with a still further general aspect of the present invention, there is provided a multi-level construction scaffolding comprising at least first and second levels, each of said first and second levels comprising a work platform supported at opposed ends thereof by a pair of generally H-shaped trusses interconnected by a pair of guard rails extending above said work platform, each truss having a pair of uprights interconnected to each other at a location intermediate their top and bottom ends by a horizontal platform support member upon which the platform rests, wherein the guard rails and the work platform of a same level are supported by the same pair of H-shaped trusses.
- In accordance with a still further general aspect of the present invention, there is provided a method of erecting a multi-level scaffolding structure, comprising the steps of: erecting a first scaffolding level comprising first and second end frames interconnected by bracing, mounting a third end frame on top of said first end frame, pivotally connecting a first end of a guard rail to said third end frame, pivotally connecting a second end of said guard rail to a fourth end frame, lifting said fourth end frame on top of said second end frame, thereby causing said guard rail to pivot upwardly from an inclined position to a substantially horizontal position between said third and fourth end frames, and mounting a work platform to said third and fourth end frames below the already installed guard rail of the second scaffolding level.
- Having thus generally described the nature of the invention, reference will now be made to the accompanying drawings, showing by way of illustration a preferred embodiment thereof, and in which:
- FIGS.1 to 7 are perspective views illustrating the various steps that have to be followed for erecting a scaffolding structure in accordance with a preferred embodiment of the present invention.
- FIGS.1 to 7 illustrate a
scaffolding system 10 whereby an operator can install the guard rails of a next level before accessing it, thereby greatly improving the operator's safety while assembling the scaffolding. As will be seen hereinafter, the scaffold guard rails are pivotally connected at a first end thereof to an already installed truss and at a second end thereof to a not yet installed second truss so that when the second truss is lifted in position onto an already installed truss of the underlying scaffolding level, the guards pivot to a horizontal position above the floor of the scaffold level that is being erected. - More particularly FIG. 7 illustrates a
multi-level scaffold 10 comprising first andsecond scaffold levels levels shaped trusses 16/18 and 20/22. Each H-shaped truss uprights work platform support 28 extending horizontally between theuprights uprights work platform support 28 is located approximately midway between the top and bottom ends of theuprights platform support 28 is in fact located in the lower haft portion of theuprights work platform support 28 advantageously allows installing the safety guard rails of a next level to be erected from the already installed underlying scaffold level. - Each H-
shaped truss diagonal reinforcing members 30 extending from the lower end portion ofopposed uprights work platform support 28. The reinforcing structure further comprises ahorizontal member 32 extending between thediagonal members 30 just below thework platform support 28.Horizontal struts 34 are also provided between thediagonal members 30 and the associated upright 24/26. - The
uprights work platform support 28 are preferably made of steel tubing whereas thediagonal members 30, thehorizontal member 32 andstruts 34 are preferably made of extruded steel. All these members are fixedly secured together as by welding. - The top ends of
uprights diameter segments 36 that are sized to fit into the lower tubular portions of the uprights of the next truss, thereby allowing the trusses to be stacked into towers. To secure the trusses together, the reduceddiameter segments 36 and the lower tubular portions of the uprights are provided with transversal registering holes (not shown) for receiving a lock pin (not shown). - First and
second level platforms first level trusses second level trusses ladder 42 is mounted between thefirst platform 38 and thesecond platform 40 for allowing an operator to climb to thesecond platform 40 from thefirst platform 38. Theladder 42 is hooked at its upper end to one of the platform support 28 on thesecond level 14. Atrap 44 is provided in thesecond platform 40 adjacent the upper end of theladder 42 for allowing the operator to have access to thesecond platform 40. - Top and intermediate vertically spaced-apart
gravity locks guard rails 52 between thefirst level trusses 16/18 as well as between thetrusses 20/22 of the second level. Eachgravity lock 46/48 comprises apivot pin 50 projecting horizontally from an upright towards the other upright of the same truss. - Each
guard rail 52 is provided in the form of a bar having opposed flattened end portions, each of which defines a hole for allowing theguard rail 52 to be pivotally engaged onto thepivot pins 50. - A
bottom gravity lock 54 is provided on each upright 24/26 just below theplatform support 28 for releasable engagement withcross braces 56 extending between the trusses of a same level. Eachcross brace 56 is releasably connected at a first end thereof to thebottom gravity lock 54 of a given upright and at a second end thereof to thetop gravity lock 46 of the opposed facing uprights. Accordingly, thetop gravity locks 46 not only act as the pivot points for thetop guard rails 52 but also act as the top anchoring points for thecross braces 56. - It is understood that when the scaffold is erected along a building wall,
guard rails 52 does not have to be installed on both the front and the rear sides of thescaffold 10. Indeed, as illustrated in FIGS. 1 to 7, they can be installed only on the front side of the scaffold. - Referring now to FIGS.1 to 7, the procedures for erecting the
scaffold 10 will now be described in greater details. - As shown in FIG. 1, the
first scaffold level 12 is first erected by first appropriately positioning on the ground a number ofadjustable jacks 60. Afirst truss 16 is then installed in position on a first pair ofjacks 60. Then, a first pair ofcross braces 56 is connected at one end thereof to the already installedtruss 16, one brace being connected to thetop gravity lock 46 while the other is connected to thebottom gravity lock 54 of the front upright 26 of the already installedtruss 16. Thereafter, asecond truss 18 is installed on a second pair ofjacks 60′ and the second opposed ends of thecross braces 56 are connected to the bottom andtop gravity locks second truss 18 so as to define a X at the front side of the first level of thescaffold 10. After having installed thecross braces 56, thefirst platform 38 can be placed onto the platform supports 28 of the already installedtrusses platform 38 has been properly leveled through the used of thejacks horizontal guard rails 52 are connected at opposed ends thereof to the top andintermediate gravity locks trusses - Once the
first level 12 has been erected as described hereinbefore, thefirst truss 20 of thesecond level 14 is placed in position on the already installedfirst truss 16 of thefirst level 12. Then, while the operator is still on thework platform 38 of thefirst level 12, tworail guards 52 are respectively pivotally engaged at one end thereof with thepins 50 of the top andintermediate gravity locks first truss 20 of the second level. - As shown in FIG. 2, the two
guard rails 52 are then respectively pivotally connected to the top andbottom gravity locks second truss 22 of thesecond level 14. Thereafter, thetruss 22 is lifted in position on top of the already installedsecond truss 18 of thefirst level 12, thereby causing the secondlevel guard rails 52 to pivot from an inclined position to a horizontal position above thework platform support 28 of thetrusses guard rails 52 of thesecond level 14 being installed from thefirst floor level 12 before thesecond level platform 38 be installed. - Once the
guard rails 52 of thesecond level 14 have been installed, across brace 56 is installed between thetrusses cross braces 56 of thefirst level 12. As shown in FIG. 4, further trusses, guard rails and braces can be mounted in series on thesecond level 14 by following the same procedure. - As shown in FIG. 5, the next step consists of installing the
work platform 38 of thesecond level 14. Thework platform 38 is hooked at opposed ends thereof to the platform supports 28 of thetrusses - As shown in FIG. 6, the
ladder 42 is subsequently hooked onto theplatform support 28 of thetruss 22 for allowing the operator to access the second floor level of the scaffold. As can be appreciated from the drawings and the above described procedure, the operator will already be protected against falling from the scaffold when he/she will step on the secondfloor level platform 38. - Finally, as shown in FIG. 7, a second work platform can be mounted in series to the
first platform 38 of the second level as per the way described above. - The same steps must be followed for installing other levels.
- The present invention is not limited to the illustrated embodiment and various changes can be made in the arrangement and design of the trusses, the guard rails and the cross braces without departing from the spirit of the present invention.
Claims (6)
1 to 7. (cancelled)
8. A multi-level construction scaffolding comprising at least first and second levels, each of said first and second levels comprising a work platform supported at opposed ends thereof by a pair of generally H-shaped trusses interconnected by a pair of guard rails extending above said work platform, each truss having a pair of uprights interconnected to each other at a location intermediate their top and bottom ends by a horizontal platform support member upon which the platform rests, wherein the guard rails and the work platform of a same level are supported by the same pair of H-shaped trusses.
9. A multi-level construction scaffolding as defined in claim 8 , wherein the two guard rails are respectively engage with first and second vertically spaced-apart pivot points provided on each truss at a distance above said platform support member thereof.
10. A multi-level construction scaffolding as defined in claim 9 , wherein at least one of said first and second levels further includes a diagonal brace interconnecting the trusses of a same level, and wherein said diagonal brace extends from one of said first pivot points of a first one of said trusses, said diagonal brace being connected at an opposed end thereof to a third pivot point provided below the platform support member of a second one of said trusses.
11. A multilevel construction scaffolding as defined in claim 8 , wherein each of said trusses includes a pair of opposed diagonal members extending upwardly from said uprights to said platform support member.
12 to 14. (cancelled)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/412,329 US20040200668A1 (en) | 2003-04-14 | 2003-04-14 | Scaffolding system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/412,329 US20040200668A1 (en) | 2003-04-14 | 2003-04-14 | Scaffolding system |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040200668A1 true US20040200668A1 (en) | 2004-10-14 |
Family
ID=33131183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/412,329 Abandoned US20040200668A1 (en) | 2003-04-14 | 2003-04-14 | Scaffolding system |
Country Status (1)
Country | Link |
---|---|
US (1) | US20040200668A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2419915A (en) * | 2004-11-09 | 2006-05-10 | Allan Craigen | Scaffold safety structures |
WO2009114912A1 (en) * | 2008-03-20 | 2009-09-24 | Vcs Management Consult Bvba | Device and method for safely erecting and dismantling a scaffold |
US20100140018A1 (en) * | 2007-03-19 | 2010-06-10 | Dick Buitendijk | Scaffold with handrail frames provided with post sections |
GB2476955A (en) * | 2010-01-15 | 2011-07-20 | David Michael Ward | Temporary guard rail for mounting on a scaffolding level |
US20130043095A1 (en) * | 2011-08-16 | 2013-02-21 | Stephen H. Thacker | Masonry scaffold system with truss level rosettes |
JP2018021419A (en) * | 2016-08-05 | 2018-02-08 | 日建リース工業株式会社 | Staircase handrail for work platform, and method for using the same |
EP3540148A1 (en) * | 2018-03-12 | 2019-09-18 | Krause-Werk GmbH & Co. KG | Method for mounting a scaffold |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1641801A (en) * | 1927-01-19 | 1927-09-06 | Dravo Equipment Company | Joint for structural towers |
US1772142A (en) * | 1929-09-23 | 1930-08-05 | Goodrich Chauncey Marsh | Scaffold |
US2316952A (en) * | 1942-11-13 | 1943-04-20 | Steel Scaffolding Company Inc | Scaffold unit |
US3752262A (en) * | 1972-06-01 | 1973-08-14 | B Helms | Scaffold guard rail assembly |
US4078633A (en) * | 1976-02-09 | 1978-03-14 | Fahy Michael B | Modular staging with platform jacks |
US4782914A (en) * | 1987-12-22 | 1988-11-08 | Nail Donald E | Safety guard rail for scaffolding |
US4830144A (en) * | 1988-01-25 | 1989-05-16 | Saf-T-Green Manufacturing Corporation | Scaffold |
US5125477A (en) * | 1990-12-20 | 1992-06-30 | F. W. Jordan & Sons, Inc. | Scaffolding guard rail post |
US5154256A (en) * | 1991-12-24 | 1992-10-13 | Aluma Systems Corp. | Scaffold guard post and lock |
US5287947A (en) * | 1992-07-24 | 1994-02-22 | Mcswain Gregory A | Vertical support grid system |
US5579866A (en) * | 1994-07-08 | 1996-12-03 | Sky Climber, Inc. | Suspended access platform |
-
2003
- 2003-04-14 US US10/412,329 patent/US20040200668A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1641801A (en) * | 1927-01-19 | 1927-09-06 | Dravo Equipment Company | Joint for structural towers |
US1772142A (en) * | 1929-09-23 | 1930-08-05 | Goodrich Chauncey Marsh | Scaffold |
US2316952A (en) * | 1942-11-13 | 1943-04-20 | Steel Scaffolding Company Inc | Scaffold unit |
US3752262A (en) * | 1972-06-01 | 1973-08-14 | B Helms | Scaffold guard rail assembly |
US4078633A (en) * | 1976-02-09 | 1978-03-14 | Fahy Michael B | Modular staging with platform jacks |
US4782914A (en) * | 1987-12-22 | 1988-11-08 | Nail Donald E | Safety guard rail for scaffolding |
US4830144A (en) * | 1988-01-25 | 1989-05-16 | Saf-T-Green Manufacturing Corporation | Scaffold |
US5125477A (en) * | 1990-12-20 | 1992-06-30 | F. W. Jordan & Sons, Inc. | Scaffolding guard rail post |
US5154256A (en) * | 1991-12-24 | 1992-10-13 | Aluma Systems Corp. | Scaffold guard post and lock |
US5287947A (en) * | 1992-07-24 | 1994-02-22 | Mcswain Gregory A | Vertical support grid system |
US5579866A (en) * | 1994-07-08 | 1996-12-03 | Sky Climber, Inc. | Suspended access platform |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2419915A (en) * | 2004-11-09 | 2006-05-10 | Allan Craigen | Scaffold safety structures |
GB2419915B (en) * | 2004-11-09 | 2009-09-23 | Allan Craigen | Scaffold safety structure |
US20100140018A1 (en) * | 2007-03-19 | 2010-06-10 | Dick Buitendijk | Scaffold with handrail frames provided with post sections |
US9297172B2 (en) * | 2007-03-19 | 2016-03-29 | XS Platforms Holding B.V. | Scaffold with handrail frames provided with post sections |
WO2009114912A1 (en) * | 2008-03-20 | 2009-09-24 | Vcs Management Consult Bvba | Device and method for safely erecting and dismantling a scaffold |
BE1018056A5 (en) * | 2008-03-20 | 2010-04-06 | Vcs Man Consult Bvba | DEVICE AND METHOD FOR THE SAFE CONSTRUCTION AND DEMOLITION OF A SCAFFOLDING. |
GB2476955A (en) * | 2010-01-15 | 2011-07-20 | David Michael Ward | Temporary guard rail for mounting on a scaffolding level |
GB2476955B (en) * | 2010-01-15 | 2012-01-04 | David Michael Ward | Temporary safety rail for scaffolding |
US20130043095A1 (en) * | 2011-08-16 | 2013-02-21 | Stephen H. Thacker | Masonry scaffold system with truss level rosettes |
JP2018021419A (en) * | 2016-08-05 | 2018-02-08 | 日建リース工業株式会社 | Staircase handrail for work platform, and method for using the same |
EP3540148A1 (en) * | 2018-03-12 | 2019-09-18 | Krause-Werk GmbH & Co. KG | Method for mounting a scaffold |
CN110259108A (en) * | 2018-03-12 | 2019-09-20 | 克劳塞工厂有限公司 | Method for installing scaffold |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTO (1972) INC., CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DUPLESSIS, BENOIT;REEL/FRAME:013967/0524 Effective date: 20030326 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |