EP2325415B1 - A guardrail system - Google Patents

A guardrail system Download PDF

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Publication number
EP2325415B1
EP2325415B1 EP10191168A EP10191168A EP2325415B1 EP 2325415 B1 EP2325415 B1 EP 2325415B1 EP 10191168 A EP10191168 A EP 10191168A EP 10191168 A EP10191168 A EP 10191168A EP 2325415 B1 EP2325415 B1 EP 2325415B1
Authority
EP
European Patent Office
Prior art keywords
couplings
pair
guardrail system
frame
guardrail
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.)
Not-in-force
Application number
EP10191168A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2325415A1 (en
Inventor
Pat Kennelly
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.)
UI Property Ltd
Original Assignee
UI Property Ltd
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 UI Property Ltd filed Critical UI Property Ltd
Publication of EP2325415A1 publication Critical patent/EP2325415A1/en
Application granted granted Critical
Publication of EP2325415B1 publication Critical patent/EP2325415B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E04G5/14—Railings
    • E04G5/147—Railings specially adapted for mounting prior to the mounting of the platform

Definitions

  • This invention relates to a guardrail system for scaffolding and mobile towers, in particular a rail system which facilitates the safe construction of a guardrail about a level of a scaffold construction above the level at which an operator is standing, thereby ensuring that as the scaffold increases in height the uppermost level being constructed can be provided with a guardrail by an operator located on the level below. This ensures that when the operator(s) then ascends to this uppermost level the entire perimeter thereof is already enclosed by the guardrail.
  • Scaffolding and mobile towers are commonly used during construction or any associated works, or for safe access where work at height is required, providing a temporary work platform that can be easily assembled and disassembled on site.
  • Such towers comprise a modular system of frames, each frame conventionally comprising at least two vertical bars having a plurality of horizontal bars extending between the vertical bars. The ends of the vertical bars are adapted to form a "plug-and-socket" arrangement with other frames, allowing for the construction of a structure through the interlocking arrangement of various frames as required.
  • Platforms, boards or planks can be positioned between suitable horizontal bars as required, to create different levels to support operators during use.
  • a condition of various health and safety regulations is that, as towers are being constructed, a worker cannot stand on any work surface (platform or level) of the tower unless that platform is suitably guarded by a guardrail to prevent against possible falls.
  • This construction method for standard guardrails has meant that such an operation can be relatively awkward.
  • GB1528220 discloses a scaffolding component 13 forming a safety railing for a working level N+1, the guard rail 13 is attached to uprights 12 forming a lower working level N in such a way as to be attachable from the lower working level and displaceable upwardly into a position in which it serves as a railing for the upper working level.
  • the frame pieces 15 of the component 13 are pivotally mounted on the uprights 12 by the middle stirrups 18 and are fixed thereto after upwardly pivoting by the lowest stirrups 18.
  • a frame is coupled to the uprights by a parallelogram linkage or the frame is slidably attached to the uprights before raising and locking in place.
  • a guardrail system comprising a frame; a pair of upper couplings and a pair of lower couplings extending from the frame, the coupling being operable to secure the frame between a pair of support members; characterised in that the pair of upper couplings are adapted to be advanced onto the respective support member from a first direction and the pair of lower couplings are adapted to be advanced onto the respective support member from a second direction substantially opposite to the first direction.
  • the couplings are oriented to secure the frame between a pair of substantially vertical support members.
  • each coupling comprises a hook.
  • each coupling comprises an open face through which the respective support member is receivable, the open face of the upper couplings facing in a first direction, and the open face of the lower couplings facing in a second direction substantially opposite to the first direction.
  • At least one of the lower couplings is adapted to be releasably locked to the respective support member.
  • the system comprises a latch mechanism in operative association with at least one of the lower couplings, in order to releasably lock the at least one lower coupling to the respective support member.
  • the latch mechanism is operable to automatically lock the at least one lower coupling to the respective support member once the at least one lower coupling has been advanced onto the support member.
  • the latch mechanism is spring biased into the locked state.
  • At least one of the upper couplings comprises a stop which is shaped and dimensioned to cooperate with a connector of the respective support member in order to resist the horizontal translation of the coupling once the guardrail system has been secured between the pair of support members.
  • the stop is positioned such as to be brought into cooperative engagement with the connector as the pair of lower couplings are advanced onto the respective support member.
  • the stop comprises a lug which extends beyond at least one side of the coupling.
  • the lug is formed integrally with the coupling.
  • the pair of upper couplings define a first axis about which the system is pivotable, and the pair of lower couplings define a second axis substantially parallel to the first axis.
  • the frame is substantially rectangular in shape, the pair of upper couplings and the pair of lower couplings projecting beyond a perimeter of the rectangle defined by the frame.
  • the frame comprises at least one internal reinforcing member.
  • the first and second axes of the frame are spaced from one another such that with the upper couplings seated on the pair of supports above an upper pair of connectors, the lower couplings, when seated on the pair of supports, will be located below a lower pair of connectors.
  • the suitable arrangement of the couplings of the guardrail system allows for the installation of the guardrail system by seating the upper couplings on the vertical bars of a pair of opposed sides of scaffolding or mobile tower frames, which upper couplings then define a horizontal pivot axis about which to rotate the guardrail system into position from a lower level of the scaffolding or mobile tower.
  • This system allows for the already installed opposed scaffolding or mobile tower frames to provide support for the installation of the guardrail system, which can be accomplished with relative ease.
  • the particular orientation of the couplings allows for the rotation of the guardrail system about the pivot axis, such that the lower couplings are advanced towards and engage a lower section of the pair of supports of the scaffolding.
  • the components of the guardrail system can be configured such that the guardrail system may be used as a structural element of the tower, to provide sufficient tower stiffness to satisfy appropriate design regulations.
  • the guardrail system of the invention can act as a combination of both a guardrail and structural brace.
  • a guardrail system according to the first aspect of the invention onto a scaffold or mobile tower comprising the steps of:
  • the method comprises locking at least one of the lower couplings to the respective support member once engaged therewith.
  • the method comprises automatically locking the at least one lower coupling to the respective support member once engaged therewith.
  • the method comprising engaging the pair of upper couplings to the support members at a position directly above a pair of upper connectors located on the support members, and engaging the pair of lower couplings to the support members at a position directly below a pair of lower connectors located on the support members.
  • connection is intended to mean a fitting used to secure a horizontal cross member to a vertical support member of a scaffold construction such as a mobile tower or the like.
  • guardrail system for use on scaffold constructions, such as a mobile scaffold tower T as seen in figures 2 and 5 to 7 .
  • the system 10 preferably forms a structural component of the tower T or other scaffold structure, but the primary purpose thereof is to allow an perimeter guardrail to be constructed at the uppermost level of the tower T from the level below, for reasons of health and safety as detailed above.
  • the system 10 comprises a frame 12, which in the embodiment illustrated is substantially rectangular in shape, and formed from any suitable material. It is preferred that the frame 12 is formed from a light yet strong material, in order to provide sufficient structural integrity to the tower T, while being light weight enough to be handled by operators constructing the tower T. For this reason aluminium is a preferred material for the manufacture of the frame 12, although it will of course be appreciated that any other suitable material may be employed.
  • the system 10 further comprises a pair of upper couplings 14 and a pair of lower couplings 16 mounted to the frame 12, the configuration and operation of which will be described in greater detail hereinafter.
  • the frame 12 itself, in the embodiment illustrated, is formed from an upper rail 18 and a substantially parallel lower rail 20, mounted between which are a pair of vertical bars 22, 24.
  • the bars 22, 24 may be secured to the rails 18, 20 in any suitable manner, for example by welding or mechanical fixings.
  • the frame 12 further comprises a horizontal cross member 26 and a vertical post 28 extending between the cross member 26 and the lower rail 20.
  • the upper rails 18 and the horizontal cross member 26 form the guardrails of the system 10, and while the positioning of same may be varied, in many jurisdictions their presence and positioning is governed by official regulations/legislation.
  • the cross member 26 and post 28 also provide stiffness and therefore structural integrity to the system 10. It will however be appreciated that the arrangement of the various components making up the frame 12 may be significantly varied, in particular to suit intended applications or functionality, or indeed regulatory requirements.
  • FIG. 1 an enlarged view of one of the upper couplings 14 is shown, in isolation from the frame 12.
  • the upper couplings 14 are secured to the frame 12 via a short standoff 30, while the lower coupling 16 are secured directly to either end of the lower rail 20.
  • the exact mounting of the couplings 14, 16 to the frame 12 may be significantly varied, while maintaining the functionality of the invention as set out hereinafter.
  • Each of the couplings 14, 16 comprise a main body 32 which in the embodiment illustrated is hook shaped, and defines an open face 34 which is shaped and dimensioned to receive a vertical support member M of the scaffold tower T during use, again as will be described hereinafter in detail.
  • One of the support members M is shown in section in figure 3 , fully engaged within the upper coupling 14.
  • the upper and lower couplings 14, 16 are essentially identical, except for the provision of a stop in the form of a lug 36 provided on each of the upper couplings 14, the reason for which is described in detail below.
  • the lug 36 is preferably formed integrally with the body 32 of the upper couplings 14, which in the embodiment illustrated are cast from aluminium or other suitable material.
  • the tower T is composed of four of the vertical support members M, each defining a corner of the tower T, with an array of horizontal members H connecting the opposed pairs of support members M.
  • Connectors C secure the horizontal members H to the vertical support members M in conventional fashion.
  • Each pair of vertical support members M and corresponding horizontal members H are generally pre-fabricated units, and there is thus no requirement, on site, to connect the horizontal members H to the vertical members M.
  • the initial build of the tower T thus begins with a pair of the pre-fabricated frames of vertical members M and horizontal members H.
  • a base level is then constructed as per the manufacturers instructions, in order to secure the pair of pre-fabricated frames to one another.
  • Flooring panels (not shown) can then be laid between opposed pairs of the horizontal members H1, in order to provide a first flooring level on which an operator can stand.
  • This level is then enclosed by mounting a rail system 10 at the front and rear thereof, the mounting process being described below with respect to the next level of the tower T.
  • the height difference between flooring levels in normally approximately two meters, which in the embodiment illustrated corresponds to five horizontal members H.
  • next level of the tower T more flooring panels (not shown) are laid between the horizontal members H2.
  • the second flooring level on the horizontal members H2 is shown spaced from the first flooring lever H1 by a gap of only two horizontal members H, but as indicated above, in practice this would normally be a gap of five horizontal members H.
  • the rail system 10 of the invention enables an operator to provide a perimeter guard rail safely enclosing this next level, but from the lower level defined by the horizontal members H1. The steps in this process are illustrated in figures 5 to 7 .
  • An operator standing inside the tower T at level H1, initially manoeuvres the rail system 10 such that the pair of upper couplings 14 are located inboard of the tower T, while the lower couplings 16 remain on the outside thereof.
  • the upper and lower couplings 14, 16 are oriented such that the open face 34 of the upper couplings 14 face the support members M to which the rail system 10 is to be secured, and likewise the open face 34 of the lower couplings 16 also face the support members M, when the rail system 10 is in the position shown in figure 5 .
  • the open face 34 of the upper couplings 14 face the opposite direction to the open face 34 of the lower couplings 16.
  • FIG. 5 illustrates one of the upper couplings 14 with the respective support member M fully seated therein. It is important to note that the upper couplings 14 should be positioned on the support members M directly above a pair of the connectors C, the reason for which is described hereinafter.
  • the pair of upper couplings 14 then define a substantially horizontal pivot axis X (shown in Figure 1 ) about which the rail system 10 can be pivoted by the operator, such that the lower couplings 16 are advanced towards the support members M in a second direction B shown in figure 6 , until the lower couplings 16 fully engage the support members M.
  • the spacing between the upper and lower couplings 14, 16 is preferably such that with the upper couplings 14 mounted directly above the upper set of connectors C, the lower couplings 16 are then located directly beneath a lower set of the connectors C, as is illustrated in figure 7 .
  • each of the upper couplings 14 projects downwardly to overlap with the perspective connector C. This ensures that the rail system 10 cannot be pivoted inwardly out of position about the pair of lower couplings 16, as the lugs 36 will foul the connectors C, preventing displacement of the upper couplings 16 from their position on the support members M.
  • Each of the lugs 36 are positioned such that during rotation of the rail system 10 about the pivot axis X the lug 36 is moved into a position co-operating with, and effectively engaging, the respective connector C in order to prevent the subsequent displacement of the upper couplings 14 once the rail system 10 is engaged on the tower T.
  • the system 10 is locked in position by the provision of a locking mechanism (not shown) associated with at least one of the lower couplings 16.
  • This locking mechanism is adapted to releasably lock the at least one lower coupling 16 to the support member M.
  • the locking mechanism is preferably spring loaded and automatically engages once the lower couplings 16 are fully seated on the support members M.
  • the locking mechanism is also preferably designed to be manually disengagable, and from a position on the lower level H1 of the tower T. It is for this reason that it is preferable that the locking mechanisms are only provided on the lower couplings 16, as these will be easily accessible from the lower level H1 of the tower T by an operator positioned therein.
  • guardrail system 10 of the present invention enables the straightforward preparation of the required guardrail protection for the next level of the scaffolding or mobile tower T, thus providing a greater degree of safety to operators operating on the tower T.
  • the guardrail system 10 also provides structural integrity to the tower T, forming an integral component thereof.
  • the dimensions of the system 10 whereby the upper couplings 14 are seated directly above an upper set of the connectors C, and the lower couplings 16 directly below a lower set of the connectors C, the guardrail system 10 can resist forces applied to the tower T, which would otherwise result in bending or swaying of the tower T.
  • guardrail system 10 of the present invention provides for a guardrail construction of relatively easy installation, and which also replace the horizontal and diagonal braces of a standard mobile tower.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Bridges Or Land Bridges (AREA)
  • Control And Safety Of Cranes (AREA)
EP10191168A 2009-11-13 2010-11-15 A guardrail system Not-in-force EP2325415B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE20090869 2009-11-13

Publications (2)

Publication Number Publication Date
EP2325415A1 EP2325415A1 (en) 2011-05-25
EP2325415B1 true EP2325415B1 (en) 2012-03-14

Family

ID=43587517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10191168A Not-in-force EP2325415B1 (en) 2009-11-13 2010-11-15 A guardrail system

Country Status (5)

Country Link
EP (1) EP2325415B1 (es)
AT (1) ATE549472T1 (es)
DK (1) DK2325415T3 (es)
ES (1) ES2387199T3 (es)
IE (1) IES20100728A2 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2471214B (en) * 2009-06-18 2012-12-12 Product Solutions Catalysis Ltd Scaffolding
GB2496182B (en) * 2011-11-04 2014-03-19 Youngman Group Ltd An advanced guard rail
FR2990226B1 (fr) * 2012-05-07 2015-10-23 Cdh Group Installation de securite et garde-corps destine a une telle installation
JP6519916B2 (ja) * 2015-03-25 2019-05-29 株式会社蒼和 足場構造

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2336532A1 (fr) * 1975-12-23 1977-07-22 Somefran Contreventement formant garde-corps d'un niveau de travail d'un echafaudage
FR2516141B1 (fr) * 1981-11-10 1987-11-27 Philippe Robert Procede de montage d'un echafaudage et dispositif monte audit procede
FR2740514B1 (fr) * 1995-10-27 1998-01-02 Mills Element retenu par gravite pour edifice tubulaire
JPH09235871A (ja) * 1996-03-04 1997-09-09 Kobe Steel Ltd 枠組足場のブレース兼用手摺枠

Also Published As

Publication number Publication date
EP2325415A1 (en) 2011-05-25
IES20100728A2 (en) 2011-05-25
ATE549472T1 (de) 2012-03-15
ES2387199T3 (es) 2012-09-17
DK2325415T3 (da) 2012-07-09

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