EP4079988A1 - Agencement de passerelle pour un toit - Google Patents

Agencement de passerelle pour un toit Download PDF

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Publication number
EP4079988A1
EP4079988A1 EP22167267.8A EP22167267A EP4079988A1 EP 4079988 A1 EP4079988 A1 EP 4079988A1 EP 22167267 A EP22167267 A EP 22167267A EP 4079988 A1 EP4079988 A1 EP 4079988A1
Authority
EP
European Patent Office
Prior art keywords
walkway
console
roof
arrangement
plane
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.)
Pending
Application number
EP22167267.8A
Other languages
German (de)
English (en)
Inventor
Rolf Hedlund
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.)
CWL Patent AB
Original Assignee
CWL Patent AB
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 CWL Patent AB filed Critical CWL Patent AB
Publication of EP4079988A1 publication Critical patent/EP4079988A1/fr
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/12—Devices or arrangements allowing walking on the roof or in the gutter
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/34—Ladders attached to structures, such as windows, cornices, poles, or the like
    • E06C1/345—Ladders attached to structures, such as windows, cornices, poles, or the like specially adapted to be installed parallel to the roof surface

Definitions

  • the present disclosure relates to a walkway arrangement for a roof.
  • Roof equipment such as snow fences, railings, ladders, walkways and safety wires with anchoring points have been a requirement for some years. Most of these are attached to the roof with roof consoles. Recently the requirements on the loads that the roof equipment can handle have been increased quite drastically. One of these requirements is that for instance an arrangement with a walkway should be able to handle static weights up to 260 kg placed on the walkway without the arrangement collapsing and in particular the consoles.
  • the walkway arrangement needs to be reinforced and one of the areas where such reinforcements may be placed is on the consoles. This may be done by choosing thicker steel plates from which the consoles are made or to introduce folded edges or ribs.
  • An objective of the present invention is to provide an improved walkway arrangement compared to prior art.
  • Another objective of the present invention is to provide a walkway arrangement being robust and having good energy absorbing properties.
  • a walkway arrangement for a roof comprises: a walkway, a walkway console and a roof console; wherein
  • in operation herein may be understood as how different parts of the walkway arrangement are arranged and/or located in relation to each other and/or to different parts of a roof, a roof structure, or a roof surface when mounted and in use.
  • the first plane may in embodiments coincide with the inclination of the roof. This may be understood such that a vector representing the inclination of the roof is parallel to and located in the first plane.
  • An inclined roof is a roof that is not horizontal but have an inclination or a slope with an angle larger than zero degrees in relation to a horizontal plane. Mentioned first plane may in examples be denoted a roof surface.
  • the second angle due to the herein defined geometry, extends outwards from the first plane.
  • an overlapping area may be considered as an area in which the walkway console and the roof console overlap with each other when attached to each other in operation. This also implies that the second attachment means and the fourth attachment means overlap with each other in the overlapping areas.
  • the present walkway arrangement With the present walkway arrangement, a robust design is provided that can withstand high static loads on the walkway and at the same time provide desired energy absorbing properties.
  • the present walkway arrangement may be a suitable part of a general fall protection system.
  • the second angle is any angle in a group comprising: larger than 45 degrees and smaller than or equal to 90 degrees: larger than 75 degrees and smaller than or equal to 90 degrees, larger than 85 degrees and smaller than or equal to 90 degrees, and substantially 90 degrees.
  • the second plane is angled to the first plane in any of the above-mentioned angle intervals. That the second plane extends outwards from the first plane implies that the second angle is larger than 0 degrees and smaller than 180 degrees. Hence, the second plane would be parallel to the first plane if the second angle would be 0 or 180 degrees.
  • the second angle may be defined as an angle between a first vector representing the inclination of the roof in the slope direction and a second vector located in the second plane and extending outwards from the first plane.
  • the first angle and the second angle have substantially the same value.
  • the roof console comprises an outward extending part in relation to the first plane, and wherein the second overlapping area is located in a distal part of the outward extending part in relation to the walkway in operation.
  • the outward extending part extends perpendicular to the first plane.
  • This location of the second overlapping area provides desired deformation/collapsing properties of the walkway arrangement.
  • the roof console comprises an elongated part extending along the first plane, in operation, and comprising the third attachment means.
  • the elongated part is attached to one side of the outward extending part.
  • an extension of the outward extending part along the first plane is larger than 50% of an extension of the elongated part along the first plane.
  • the roof console comprises at least one first deformation initiator.
  • An advantage with this embodiment is that the energy properties of the walkway arrangement can be configured for different applications.
  • the first deformation initiator is located in a proximal part of the outward extending part in relation to the walkway in operation.
  • This location of the second overlapping area provides desired deformation/collapsing properties of the walkway arrangement.
  • the roof console comprises an engagement means configured to engage with roof equipment for holding the roof equipment.
  • the second overlapping area is located in a distal part of the walkway console in relation to the walkway in operation.
  • This location of the second overlapping area provides desired collapsing properties of the walkway arrangement.
  • the walkway console is U-shaped, and wherein the first attachment means are located at the supporting legs of the U-shaped walkway console in a proximal part of the walkway console in relation to the walkway for supporting the walkway in operation.
  • An advantage with this embodiment is that a robust design with reduced amount of sheet metal for manufacturing the walkway console can be provided.
  • the walkway console comprises at least one second deformation initiator.
  • An advantage with this embodiment is that the energy absorbing properties of the walkway arrangement can be configured for different applications.
  • the second deformation initiator is located between the first overlapping area and the second overlapping area in the walkway console.
  • This location of the second overlapping area provides desired deformation/collapsing properties of the walkway arrangement.
  • the first deformation initiators and/or the second deformation initiators comprises an area with a weakening.
  • the walkway arrangement comprises a supporting beam extending in an angle from the first overlapping area to the walkway to support the walkway in operation.
  • An advantage with this embodiment is that a more robust support for the walkway is provided.
  • the second attachment means and the fourth attachment means comprise cut-outs or through holes in sheet metal.
  • cut-outs or through holes may be combined with bolts, screws or any other suitable means for attachment of the roof console to the walkway console so as to form the first and second overlapping areas.
  • the second attachment means and the fourth attachment means at least partially overlap in the first overlapping area and in the second overlapping area.
  • Measures of reinforcing a walkway arrangement may conflict with other requirements for walkway arrangements. Apart from being arranged to walk on, they may also function as anchoring points for personal fall protection systems.
  • the anchoring points used with walkways are often designed as safety wires running along the walkway, usually on an outer side of the walkway facing the eaves.
  • one requirement is that the roof equipment should be able to handle fall weights, such as a person falling off the walkway, wherein the arrangement should deform or collapse in a controlled manner, providing energy absorbing properties such that the fall is dampened or arrested. If the walkway arrangement is too rigid, the stop of the fall will be very sudden, and the falling person may be adversely affected by such a sudden stop resulting in severe injury.
  • a walkway arrangement should fulfil a number of different requirements.
  • a deformed walkway arrangement should be capable of holding a fall weight that according to current standards amounts to thousand kilos.
  • the roof should not be damaged by such a fall, which means that the walkway arrangement has to deform or collapse in a controlled manner and such that an attachment point of the personal fall protection holding the weight is moved as close as possible to the roof surface in order to reduce the leverage of the pulling forces from the weight. Otherwise, the leverage may cause the walkway arrangement to be removed from the roof or at least damage the roof seriously.
  • Fig. 1 shows a walkway arrangement 100 in a perspective view from below according to embodiments of the invention.
  • Fig. 2 and 3 show the walkway console 300 and the roof console 400 in Fig. 1 as separate parts when not being attached to each other, i.e., not mounted together in operation.
  • the walkway arrangement 100 comprises: a walkway 200, a walkway console 300 and a roof console 400.
  • the walkway console 300 comprises a first attachment means 302, 304 for attaching the walkway console 300 to the walkway 200 and a second attachment means 312, 314 for attaching the walkway console 300 to the roof console 400.
  • the roof console 400 further comprises a third attachment means 402, 404 for attaching the roof console 400 to a roof 500 and a fourth attachment means 412, 414 configured to cooperate with the second attachment means 312, 314 for attachment of the walkway console 300 to the roof console 400, or vice versa.
  • first overlapping area A1 comprising a rotation axis around which the walkway console 300 can be rotated in relation to the roof console 400 for adjusting a first angle ⁇ between a walking plane WP of the walkway 200 and a first plane P1 parallel with an inclination I of a roof 500.
  • the second attachment means 312, 314 and the fourth attachment means 412, 414 in operation, further together form a second overlapping area A2 comprising a locking mechanism for locking the walking plane WP of the walkway 200 in relation to the first plane P1 in the first angle ⁇ , wherein the second overlapping area A2 extends in the roof console 400 along and around a second plane P2 extending outwards from the first plane P1 in a second angle ⁇ in relation to the first plane P1.
  • the walkway console 300 act as an intermediate part arranged between the walkway 200 and the roof console 400 for supporting the walkway 200.
  • first plane P1 and the second plane P2 The relation between the first plane P1 and the second plane P2 is illustrated in Fig. 3 where two different second angles ⁇ 1 and ⁇ 2 are shown.
  • the second angle ⁇ may have a value within a very wide range.
  • the second angle ⁇ may be any angle in a group comprising: larger than 45 degrees and smaller than or equal to 90 degrees: larger than 75 degrees and smaller than or equal to 90 degrees, larger than 85 degrees and smaller than or equal to 90 degrees, and substantially 90 degrees.
  • some of the fourth attachment means of the roof console 400 will be placed in an area close to the roof and close to an end area of the roof console facing an eaves of the roof and cooperates with some of the second attachment means of the walkway console 300.
  • the roof console 400 comprises an outward extending part 424 in relation to the first plane P1 and the second overlapping area A2 is located in a distal part 452 of the outward extending part 424 in relation to the walkway 200, in operation, according to embodiments of the invention.
  • the first overlapping area A1 is located in the proximal part 454 of the outward extending part 424 in relation to the walkway 200.
  • the walkway console 300 may have a flat shape and when mounted in operation extend in parallel with the outward extending part 424 of the roof console 400.
  • the first overlapping area A1 may be located at the centre section of the walkway console 300 while the second overlapping area A2 is located in a distal part 352 of the walkway console 300 in relation to the walkway 200.
  • the roof console 400 may further comprise an elongated part 422 extending along the first plane P1, in operation, as shown in the Figs.
  • the elongated part 422 comprises the third attachment means 402, 404 for fastening the roof console 400 to the roof 500.
  • the elongated part 422 may be attached to one side of the outward extending part 424 in embodiments of the invention.
  • an extension of the outward extending part 424 along the first plane P1 may be larger than 50% of an extension of the elongated part 422 along the first plane P1.
  • Fig. 4 shows a walkway arrangement 100 in a first perspective view from below and Fig. 5 shows the walkway arrangement 100 of Fig. 4 in a second perspective view from below according to further embodiments of the invention.
  • the second attachment means 312, 314 and the fourth attachment means 412, 414 may comprise cut-outs or through holes in sheet metal. Mentioned cut-outs and through holes may be combined with any other suitable attachment means for attaching the different parts of the present walkway arrangement.
  • such attachment means are bolts 412', 414', 312', 314' but are not limited thereto. It may be noted that the rotational axis of the first overlapping area A1 may be defined by such a bolt in combination with cut-outs.
  • Fig. 4 is the shape of the walkway console 300.
  • the walkway console 300 has a U-shape that is arranged with its legs being attached to the walkway 200 for supporting the latter.
  • the first attachment means 302, 304 are located at the supporting legs 326, 328 of the U-shaped walkway console 300 in a proximal part 352 of the walkway console 300 in relation to the walkway 200 for supporting the walkway 200 in operation.
  • the proximal part 352 comprises the supporting legs 326, 328.
  • the walkway 200 may rest in an unfixed manner on the supporting leg closest to the roof in operation as shown in Fig. 1 .
  • no bolt or screw is arranged in the through hole 302 of the supporting leg closest to the roof.
  • the deformation of the walkway arrangement 100 will be different compared to when the walkway 200 is resting in a fixed manner on the supporting leg being closest to the roof.
  • a supporting beam or strut 212 may be arranged to extend in an angle from the first overlapping are A1 to the walkway 200 to support the walkway 200 in operation.
  • the supporting beam 212 is hence angled in relation to a supporting leg.
  • Fig. 6 and 7 respectively, shows a walkway console 300 and a roof console 400 as separate parts when not being attached to each other according to yet further embodiments of the invention.
  • the roof console 400 may comprises at least one first deformation initiator 442 located at suitable regions of the roof console 400.
  • a configuration having good deformation properties is the case when the first deformation initiator 442 is located in a proximal part 454 of the outward extending part 424 in relation to the walkway 200 in operation.
  • the first deformation initiator 442 may in further embodiments be directed towards the walkway 200. Thereby, the first deformation initiator will guide the deformation when a load exceeding a threshold load is applied at the walkway arrangement 100.
  • the roof console 400 may also comprise an engagement means 432 configured to engage with roof equipment for holding the roof equipment, not shown in the Figs.
  • the engagement means may be elongated and/or circular through holes for engagement with corresponding engagement means of roof equipment but are not limited thereto.
  • Non-limiting examples of engagement means are circular through holes in different sizes, elongated slots and slits that may or may not be combined with circular holes.
  • Other non-limiting examples of engagement means may be different types of couplings and connections such as screw connections and bolt connections.
  • Further non-limiting examples are protrusions or other protruding portions for engagement with a roof equipment. Examples of roof equipment are snow fences and ridge rails.
  • the second overlapping area A2 may be located in a distal part 352 of the walkway console 300 in relation to the walkway 200 in operation.
  • the walkway console 300 may also comprise at least one second deformation initiator 342.
  • Fig. 8 to 10 show different walkway consoles 300 having different configurations of the second deformation initiator 342 and where the second overlapping area A2 is located in the distal part 352 of the walkway console 300. Different configurations will provide different deformation properties.
  • a configuration with good deformation property is the case when the second deformation initiator 342 is located between the first overlapping area A1 and the second overlapping area A2 in the walkway console 300 as illustrated in the Figs.
  • the third attachment means of the walkway console 300 may be arranged generally along a circle sector with a radius in relation to the rotational axis comprised in the first overlapping area A1.
  • the deformation initiators will provide controlled bending or collapsing of the walkway arrangement 100.
  • the first deformation initiator 442 will cause the walkway arrangement 100 to bend and collapse when exposed to forces from a person, secured to the walkway arrangement 100 with personal fall protection equipment, falling off the walkway.
  • the walkway arrangement 100 will then act as an energy absorbing unit.
  • the controlled collapsing will move the force point towards and close to the roof such that the leverage of the force point is reduced, thereby minimizing the risk that the roof console 400 is torn off the roof.
  • the second deformation initiator 342 will also ascertain that attachment points on the walkway 200 will move towards the roof surface due to the collapsing, minimizing the leverage. This is illustrated in Figs. 11 and 12 where a walkway arrangement 100 is exposed to a test with a falling weight. Fig. 11 shows how the walkway arrangement 100 is collapsing during the fall. Due to the force/load on the roof console 400, the first deformation initiator 442 causes a break of the roof console 400 so that the upper section 424 of the roof console 400, the walkway console 300 and the walkway 200 are moved in the force direction FD.
  • the second deformation initiator 342 due to its location on the walkway console 300 will causes the walkway console 300 with the upper section 424 of the roof console 400 to bend and move the walkway 200, and thus the force point FP closer towards the roof surface.
  • the bending will continue when the fall is stopped, moving the walkway 200 and the force point FP even closer to the roof surface, as seen in Fig. 12 .
  • This controlled bending and collapsing reduces the leverage for the force and will thus reduce the risk that the upper part of the roof console 400 attached to the roof is exposed to high lifting forces, which otherwise could lead to that the roof console 400 is torn off from the roof.
  • the present walkway arrangement 100 may be produced from sheet metal parts bent in suitable shapes. Hence, sheet metal may be punched in different shapes and thereafter bent or folded for producing different parts of the walkway arrangement 100 according to embodiments of the invention. The different parts of the walkway arrangement 100 may thereafter be attached to each other by means of any suitable attachment means known in the art, such as using through holes with bolts, adhesives, and welding.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Body Structure For Vehicles (AREA)
EP22167267.8A 2021-04-19 2022-04-08 Agencement de passerelle pour un toit Pending EP4079988A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2150481 2021-04-19

Publications (1)

Publication Number Publication Date
EP4079988A1 true EP4079988A1 (fr) 2022-10-26

Family

ID=81306988

Family Applications (1)

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EP22167267.8A Pending EP4079988A1 (fr) 2021-04-19 2022-04-08 Agencement de passerelle pour un toit

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EP (1) EP4079988A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE478000C (de) * 1929-06-05 Paul Mayerhoff Laufbrettstuetze
GB2478564A (en) * 2010-03-10 2011-09-14 Kee Safety Ltd Roof walkway assembly
EP3176343A1 (fr) * 2015-12-01 2017-06-07 ATL Limited Support de fixation pour équipement de toit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE478000C (de) * 1929-06-05 Paul Mayerhoff Laufbrettstuetze
GB2478564A (en) * 2010-03-10 2011-09-14 Kee Safety Ltd Roof walkway assembly
EP3176343A1 (fr) * 2015-12-01 2017-06-07 ATL Limited Support de fixation pour équipement de toit

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