GB2568303A - Device for testing the structural integrity of a barrier, and associated method - Google Patents

Device for testing the structural integrity of a barrier, and associated method Download PDF

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Publication number
GB2568303A
GB2568303A GB1718723.8A GB201718723A GB2568303A GB 2568303 A GB2568303 A GB 2568303A GB 201718723 A GB201718723 A GB 201718723A GB 2568303 A GB2568303 A GB 2568303A
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United Kingdom
Prior art keywords
barrier
frame
linear actuator
end portion
testing
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GB1718723.8A
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GB201718723D0 (en
GB2568303B (en
Inventor
Martin Wedgwood Jonathan
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BAE Systems PLC
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BAE Systems PLC
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
    • G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means
    • G01L5/0038—Force sensors associated with force applying means applying a pushing force
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure

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  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The device 100 can be moved into position to test the structural integrity of a barrier 200. The barrier 200 extending, in a vertical direction, from a surface. The device 100 comprising: a frame 101 arranged to be supported on the surface; and a linear actuator 103 supported by the frame 101. The linear actuator 103 comprising a first end portion 105 arranged to move towards and/or away from the barrier 200 in ahorizontal direction so as to apply a horizontal force to the barrier 200. The linear actuator 103 comprising a stationary second end portion 107. A method for testing the structural integrity of the barrier 200 using the device 100 is also provided.

Description

DEVICE FOR TESTING THE STRUCTURAL INTEGRITY OF A BARRIER, AND ASSOCIATED METHOD
The present invention relates to a device for testing the structural integrity of a barrier, and an associated method. In particular, the present invention is concerned with a device for testing the structural integrity of a handrail of the type comprising a rail spaced apart, in a vertical direction from a surface.
Background
It is desirable to test the structural integrity of a barrier. This is because building standards and regulations may require that barriers are able to withstand particular forms of design load. For example, British Standard BS 6180: 1982 requires that the maximum displacement of a barrier at a duty loading of either 0.74 kN/m or 0.36 kN/m (depending on the type and application of barrier) may be no more than a predetermined displacement, such as 25 mm. The standard further requires that the load is a horizontal uniformly distributed load, and is applied at a notional height of 1100 mm above the surface (e.g. the floor level).
A first existing device for testing the structural integrity of a barrier comprises a linear actuator. The linear actuator is clamped between a barrier and another vertically extending surface for the linear actuator to react against. The vertically extending surface may be a wall or another barrier. When energized, the linear actuator engages and applies a horizontal load to the barrier and the reactive surface at the same time. This existing arrangement can be complicated to install, and requires a reactive surface such as a wall or opposing barrier which limits its application.
A second existing device for testing the structural integrity of a barrier comprises a frame which supports a linear actuator at a 45 degrees angle with respect to the surface, such that it is arranged diagonally with respect to the surface and the barrier. The linear actuator comprises a first end portion arranged to move towards the barrier in the diagonal direction so as to apply a load to the barrier. The applied load being in the diagonal direction means that it has a horizontal component and a vertical upwards component. The linear actuator further comprises a stationary second end portion, and thus distinguishes from the first existing device for which both end portions of the linear actuator are moveable so as to engage the opposing barriers.
It is an object of the present invention to provide an improved device for testing the structural integrity of a barrier, or at least provide an alternative to the existing devices.
Summary
According to the present disclosure there is provided a device and method as set forth in the appended claims. Other features of the invention will be apparent from the dependent claims, and the description which follows.
According to a first aspect of the invention, there is provided a device for testing the structural integrity of a barrier, the barrier extending, in a vertical direction, from a surface, the device comprising:
a frame arranged to be supported on the surface;
a linear actuator supported by the frame, the linear actuator comprising a first end portion arranged to move towards and/or away from the barrier in a horizontal direction so as to apply a horizontal force to the barrier, and a stationary second end portion.
By “horizontal direction” we mean that the linear actuator moves substantially in the horizontal direction. In other words, the movement of the linear actuator is substantially entirely in the horizontal direction and does not have a substantial vertical component.
By “horizontal force” we mean that the linear actuator moves substantially in the horizontal direction so as to apply a substantially horizontal force to the barrier. In other words, the force applied to the barrier has substantially entirely a horizontal component and does not have a substantial vertical component.
Significantly, the device of the first aspect of the invention combines the benefits of the first and second existing devices without having the same disadvantages. In particular, like the first existing device, the device of the first aspect of the invention applies a horizontal force to the barrier rather than a diagonal force. Applying a horizontal force is beneficial as several standards, such as BS 6180: 1982 require that the load be applied in a horizontal direction. The second existing device applies a diagonal load which may require calculations to be performed to derive the horizontal component of the diagonal load. Further, the application of the diagonal load may be undesirable as the vertical component of the diagonal load may act to lift the barrier upwards from the surface. Further, like the second existing device, the linear actuator of the device of the first aspect of the invention has a stationary second end of the linear actuator. This means that the device does not need to be clamped between two opposing barriers, and is thus more versatile and easier to install than the device of the first aspect of the invention.
The linear actuator may be arranged to apply a horizontal, controlled, variable load of between 0.2 and 3.5 kN/m to the barrier. The particular load to be applied may be varied as desired based on the type of barrier, the type of test being performed, and the standard to which the barrier is being tested for conformance to. The load may be between 0.2 and 1 kN/m and/or between 2.5 and 3.5 kN/m. The load may be between 0.3 and 0. 5 kN/m and/or between 0.6 and 0.8 kN/m and/or between 2.7 and 3.2 kN/m. The load may be 0.36 kN/m and/or 0.74 kN/m and/or 3 kN/m.
A load of 0.36 kN/m may be used for testing the displacement of a medium handrail for use in light pedestrian traffic routes in industrial and storage buildings except designated escape routes, for example. A load of 0.74 kN/m may be used for testing the displacement of a heavy handrail for use in stairs, landings, corridors, ramps, footways and pavements adjacent to basement/sunken area, for example. A load of 3 kN/m or higher may be used for testing panic barriers or crash barriers for use in roadways.
It will be appreciated that there may be a trade-off between the amount of load able to be applied by the device and the portability of the device. This may mean that a device for applying a load of 3 kN/m may be less portable than a device for applying a load of 0.74 kN/m or less.
The stationary second end portion may be fixed relative to the frame such that the second end portion does not move relative to the frame.
The device may be a free standing device. This means that the device may standalone in an upright configuration without requiring a barrier for support.
The device may further comprise a measuring device. The measuring device may be operable to measure at least one of the force applied to the barrier by the linear actuator and the displacement of the first end portion of the linear actuator relative to the frame. The measuring device may be attached to or incorporated in the frame or the linear actuator. In another example, the measuring device may be separate from the device and communicatively coupled by a wired or wireless connection.
The frame may comprise a first support member arranged to support the stationary second end portion of the linear actuator. The first support member may be fixedly coupled to the second end portion of the linear actuator such that the second end portion of the linear actuator is not able to move relative to the first support member/frame.
The frame may further comprise a second support member arranged to support the first end portion of the linear actuator. The second support member may comprise an aperture arranged such that the first end portion of the linear actuator may move towards and/or away from the barrier via the aperture. That is, the first end portion of the linear actuator may move through the aperture so as to engage the barrier.
The frame may comprise a horizontal base member. The first support member and/or second support member may extend from the horizontal base member, the support members may extend in the vertical direction. The frame may further comprise a first bracing member extending diagonally between the first and second support members. The first bracing member may be held under tension between the first and second support members.
The frame may further comprise a second bracing member extending diagonally from the frame towards the surface. The second bracing member may be arranged to be held under compression between the frame and the surface. The second bracing member may be removable from the frame.
The device may further comprise at least one actuator arranged to raise and/or lower the frame relative to the surface. This means that the at least one actuator may raise and/or lower the height of the linear actuator relative to the surface such that the position at which the force may be applied to the barrier may be changed.
The device may be a movable device. The device may be moved to different locations such that it may test the structural integrity of different barriers or of the same barriers in different locations. The device may be moveable though use of a trolley provided with the device. The frame may be mounted on at least one wheel. That is, the frame may comprise at least one wheel so that the device may be moved via the at least one wheel into a desired position.
The device may further comprise an anchoring arrangement for anchoring the frame to the surface. The anchoring arrangement may comprise at least one electromagnet arranged, when energized, to anchor the frame to a magnetic surface.
The device may comprise at least one foot arranged to rest on the surface. The at least one foot may comprise the at least one electromagnet.
The anchoring arrangement may comprise at least one weight arranged to rest on the surface. The frame may be arranged to be tethered to the at least one weight.
The device may further comprise a cup portion attached to the first end portion of the linear actuator. The cup portion may be removable from the first end portion. That is, the cup portion may be releasably attachable to the first end portion. The cup portion may define a contact region for contacting the barrier. Different cup portions with different sized contact regions may be used depending on the height or other properties of the barrier. In this way, a force may be applied to barriers of different heights without requiring change to the height of the frame.
The first end portion of the linear actuator may be arranged to apply the horizontal force to the barrier at a height of between 900 mm and 1300 mm relative to the surface. The horizontal force may be applied at a height of between 1000 mm and 1200 mm. The horizontal force may be applied at a height of 1100 mm. The application of the horizontal force at other heights relative to the barrier is within the scope of the present invention.
The barrier may be a handrail, and thus the device may be for testing the structural integrity of a handrail. The handrail may comprise a rail spaced apart, in the vertical direction, from the surface. For testing the structural integrity of a handrail, it is generally preferred that the horizontal force is applied by the linear actuator at a height of 1100 mm. In other examples, the barrier may be a pedestrian barrier. In existing arrangements, pedestrian barriers may be tested using the first existing device. In this existing arrangement, the linear actuator is positioned between the pedestrian barrier and a large wheel from an articulated vehicle. The wheel acts as the reactive surface that the linear actuator pushes against. A problem with this arrangement is that the roadway has to be closed while the testing takes place. This is because the roadway adjacent to the pedestrian barrier is occupied by the large wheel used as the reactive surface. The device of the present invention improves on this arrangement as it does not require a reactive surface such as a wheel from an articulated vehicle. The device of the present invention can be used to test the pedestrian barrier from the footpath side rather than the roadway. This means that the roadway does not need to be closed while the testing takes place.
The barrier may also be a crash barrier for use in roadways. As explained above, larger forces may be required for testing such a crash barrier which may mean that the device is less portable.
The frame may have between 1000 mm and 1500 mm long. The frame may be between 1100 mm and 1300 mm long. The frame may be 1250 mm long. Other sizes of frame are within the scope of the present invention.
According to a second aspect of the invention, there is provided a method for testing the structural integrity of a barrier, the barrier extending, in the vertical direction, from a surface, the method comprising: positioning a device as claimed in any preceding claim in proximity to the barrier; and energizing the linear actuator of the device to apply a horizontal force to the barrier.
The method may further comprise measuring at least one of the force applied to the barrier by the linear actuator and the displacement of the first end portion of the linear actuator relative to the frame.
The method may further comprise moving the device to a second position in proximity to the barrier, and energizing the linear actuator of the device to apply a horizontal force to the barrier.
The method may further comprise moving the device to a third position in proximity to another barrier, and energizing the linear actuator of the device to apply a horizontal force to the barrier.
Brief Description of the Drawings
Examples of the present disclosure will now be described with reference to the accompanying drawings, in which:
Figure 1 shows a schematic view of a device according to aspects of the present invention; and
Figure 2 shows a process diagram of a method according to aspects of the present invention.
Detailed Description
Referring to Figure 1 there is shown a device 100 according to aspects of the present invention. The device 100 is for testing the structural integrity of a barrier 200 extending in a vertical direction from a surface (not shown). The surface may be a floor. The barrier 200 in Figure 1 is shown in the form of a handrail 200.
The device 100 comprises a frame 101 that is supported on the surface and a linear actuator 103 that is supported by the frame 101. The linear actuator 103 comprises a first end portion 105 that can move towards and/or away from the barrier 200 in a horizontal direction so as to apply a horizontal force to the barrier 200. The linear actuator 103 further comprises a stationary second end portion 107. The stationary second end portion 107 is fixedly coupled to the frame 101 such that the stationary second end portion 107 does not move relative to the frame 101.
The linear actuator 103 shown in Figure 1 is in the form of a pneumatic cylinder 103. When energized, the first end portion 105 of the linear actuator 103 moves in the direction indicated by the arrow F such that the first end portion 105 moves towards the barrier 200 so as to apply a load to the barrier 200. The first end portion 105 of the linear actuator 103 moves in a horizontal direction as indicated by the arrow F such that a horizontal load is applied to the barrier 200.
A cup portion 121 is attached to the first end portion 105 of the linear actuator 103. The cup portion 121 defines a contact region for contacting the barrier 200 when the first end portion 105 of the linear actuator 103 moves towards the barrier 200. The cup portion 121 may be preferred as it typically has a larger surface area than the first end portion 105. The cup portion 121 may be releasably attachable to the first end portion 105. In this way, different cup portions 121 with different sized contact regions may be used depending on the height or other properties of the barrier 200. As a result, a force may be applied to barriers of different heights without requiring change to the height of the frame 101.
The device 100 further comprises a measuring device 109 incorporated onto the frame 101. The measuring device 109 is not limited to this particular position, and can be positioned anywhere where it can measure at least one of the force applied to the barrier 200 by the linear actuator 103 and the displacement of the first end portion 105 of the linear actuator 103 relative to the frame 101. In some examples, the measuring device 109 has a display for displaying the force and the displacement. In some examples, the measuring device 109 can transmit the measurement data to an external processing device (not shown) such that the data may be stored and processed. The transmission of the data may be over a wired or wireless communication protocol.
The frame 101 of the example shown in Figure 1 comprises a first support member 113 that supports the stationary second end portion 107 of the linear actuator 103, and a second support member 115 arranged to support the first end portion 105 of the linear actuator 103. The first support member 113 has a coupling arrangement 119 that receives the second end portion 107 of the linear actuator 103 and fixedly holds the second end portion 107 in place such that the second end portion 107 does not move relative to the frame 101. The second support member 115 terminates in an aperture 117 sized such that the first end portion 105 of the linear actuator 103 may move towards and/or away from the barrier 200 via the aperture 117. In particular, part of the first end portion 105 of the linear actuator 103 may move through the aperture 117 so as to engage the barrier 200. In this way, the second support member 115 is able to support the first end portion 105 of the linear actuator 103 while still allowing movement of the first end portion 105 of the linear actuator 103.
The first and second support members 113, 115 extend vertically upwards from a horizontal base member 111 of the frame 101. In this way, the first and second support members 113, 115 are upright support members 113, 115. The frame 101 further comprises a first bracing member 121 that extends diagonally between the first and second support members 113, 115. The first bracing member 121 is held in tension and thus helps form a rigid frame 101, and helps reduce any relative movement between the first and second support members 113, 115. The frame 101 further comprises a removable second bracing member 123 that extends diagonally from the frame 101 towards the surface. The second bracing member 123 is shown removably coupled to the coupling arrangement 119 of the second support member 113. In use, the second bracing member 123 is held under compression between the frame 101 and the surface. The second bracing member 123 acts as a further support for the frame 101 and helps hold the frame 101 in an upright configuration. The second bracing member 123 may be removed, for example, if the frame 101 is positioned against a wall or other rigid vertical support.
Therefore, the device 100 of the present invention provides a free-standing frame 101 that may stand along in an upright configuration without requiring a barrier for support. The frame 101 supports a linear actuator 103 that moves horizontally to apply a horizontal force to a barrier 200.
In some arrangements, an anchoring arrangement (not shown) may be used for anchoring the frame 101 to the surface. The anchoring arrangement may be used such that the frame 101 is held in a rigid position while the force is applied to the barrier 200 by the linear actuator 103.
In one example, the anchoring arrangement comprises at least one electromagnet (not shown). The electromagnet, when energized, acts to anchor the frame 101 to a magnetic surface (e.g. a stainless steel floor). The device 100 may comprise at least one foot (not shown) arranged to rest on the surface, and the at least one foot may comprise the at least one electromagnet. In another example, the at least one electromagnet may be separate from the frame 101, and the frame 101 may be tethered to the at least one electromagnet. In another example, at least one weight is used instead of or in addition to the electromagnet. The at least one weight may be separate from the frame 101 and may be arranged to rest on the surface. The frame 101 may be arranged to be tethered to the at least one weight.
In some examples, the device 100 further comprise at least one actuator arranged to raise and/or lower the frame 101 relative to the surface. This means that the at least one actuator may raise and/or lower the height of the linear actuator 103 relative to the surface such that the position at which the force may be applied to the barrier 200 may be changed.
The first end portion 105 of the linear actuator 103 may be arranged to apply the horizontal force to the barrier 200 at a height of between 900 mm and 1300 mm relative to the surface. The horizontal force may be applied at a height of between 1000 mm and 1200 mm. The horizontal force may be applied at a height of 1100 mm. A height of 1100mm is generally preferred as some standards, such as BS 6180: 1982, require that the horizontal load is applied at a notional height of 1100 mm above the surface (e.g. the floor level).
In the above examples, the device 100 is a movable device, such that the device 100 may be moved to different locations for testing the structural integrity of different barriers 200 or of the same barriers 200 in different locations. In some examples, a trolley (not shown) is provided for transporting the device 100. In other examples, the frame 101 may be mounted on at least one wheel (not shown).
Referring to Figure 2 there is shown a process diagram of a method according to aspects of the present invention.
In step 101, the device is positioned in proximity to the barrier.
In step 102, the linear actuator of the device is energized to apply a horizontal force to the barrier.
The method may further comprise measuring at least one of the force applied to the barrier by the linear actuator and the displacement of the first end portion of the linear actuator relative to the frame.
The method may further comprise moving the device to a second position in proximity to the barrier, and energizing the linear actuator of the device to apply a horizontal force to the barrier.
The method may further comprise moving the device to a third position in proximity to another barrier, and energizing the linear actuator of the device to apply a horizontal force to the barrier.
The described and illustrated embodiments are to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiments have been shown and described and that all changes and modifications that come within the scope of the inventions as defined in the claims are desired to be protected. It should be understood that while the use of words such as “preferable”, “preferably”, “preferred” or “more preferred” in the description suggest that a feature so described may be desirable, it may nevertheless not be necessary and embodiments lacking such a feature may be contemplated as within the scope of the invention as defined in the appended claims. In relation to the claims, it is intended that when words such as “a,” “an,” “at least one,” or “at least one portion” are used to preface a feature there is no intention to limit the claim to only one such feature unless specifically stated to the contrary in the claim. When the language “at least a portion” and/or “a portion” is used the item can include a portion and/or the entire item unless specifically stated to the contrary.
In summary, there is provided a device 100 (Figure 1) for testing the structural integrity of a barrier 200, and associated method. The device 100 can be moved into position to test the structural integrity of a barrier 200. The barrier 200 extending, in a vertical direction, from a surface. The device 100 comprising: a frame 101 arranged to be supported on the surface; and a linear actuator 103 supported by the frame 101. The linear actuator 103 comprising a first end portion 105 arranged to move towards and/or away from the barrier 200 in a horizontal direction so as to apply a horizontal force to the barrier 200. The linear actuator 103 comprising a stationary second end portion 107. A method for testing the structural integrity of the barrier 200 using the device 100 is also provided.
Attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

Claims (15)

1. A device for testing the structural integrity of a barrier, the barrier extending, in a vertical direction, from a surface, the device comprising:
a frame arranged to be supported on the surface;
a linear actuator supported by the frame, the linear actuator comprising a first end portion arranged to move towards and/or away from the barrier in a horizontal direction so as to apply a horizontal force to the barrier, and a stationary second end portion.
2. A device as claimed in claim 1, further comprising a measuring device, the measuring device being operable to measure at least one of the force applied to the barrier by the linear actuator and the displacement of the first end portion of the linear actuator relative to the frame.
3. A device as claimed in claim 1 or 2, wherein the frame comprises a first support member arranged to support the stationary second end portion of the linear actuator.
4. A device as claimed in claim 3, wherein the frame further comprises a second support member arranged to support the first end portion of the linear actuator, the second support member comprising an aperture arranged such that the first end portion of the linear actuator may move towards and/or away from the barrier via the aperture.
5. A device as claimed in claim 4, wherein the frame comprises a horizontal base member, and wherein the first support member and/or second support member extend from the horizontal base member in the vertical direction.
6. A device as claimed in claim 4 or 5, wherein the frame further comprises a first bracing member extending diagonally between the first and second support members.
7. A device as claimed in any preceding claim, wherein the frame further comprises a second bracing member extending diagonally from the frame towards the surface, and optionally wherein the second bracing member is removable from the frame.
8. A device as claimed in any preceding claim, further comprising at least one actuator arranged to raise and/or lower the frame relative to the surface.
9. A device as claimed in any preceding claim, wherein the frame is mounted on at least one wheel.
10. A device as claimed in any preceding claim, wherein the device further comprises an anchoring arrangement for anchoring the frame to the surface.
11. A device as claimed in claim 10, wherein the anchoring arrangement comprises at least one electromagnet arranged, when energized, to anchor the frame to a magnetic surface.
12. A device as claimed in claim 11, wherein the device comprises at least one foot arranged to rest on the surface, the at least one foot comprising the at least one electromagnet.
13. A device as claimed in claim 10, wherein the anchoring arrangement comprises at least one weight arranged to rest on the surface, and wherein the frame is arranged to be tethered to the at least one weight.
14. A device as claimed in any preceding claim, wherein the device is for testing the structural integrity of a handrail, the handrail comprising a rail spaced apart, in the vertical direction, form the surface.
15. A method for testing the structural integrity of a barrier, the barrier extending, in the vertical direction, from a surface, the method comprising:
positioning a device as claimed in any preceding claim in proximity to the barrier; and energizing the linear actuator of the device to apply a horizontal force to the barrier.
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DE19932084A1 (en) * 1999-07-12 2001-02-01 Johannes Habrichs Mast rigidity testing method, evaluating difference between sideways deviations of mast for two different forces applied on mast
EP1416259A2 (en) * 2002-11-02 2004-05-06 Christa Reiners Procedure and device for testing the stability of a pole
CN204461778U (en) * 2015-01-27 2015-07-08 浙江大唐家具有限公司 A kind of seat proving installation with the chair back
KR20170103437A (en) * 2016-03-04 2017-09-13 (주)건설기술원 Device for testing guard post

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GB2091888A (en) * 1980-12-18 1982-08-04 Gilmat Engineering Ltd A testing unit for crash barriers
GB2250825A (en) * 1990-10-27 1992-06-17 Gilmat Engineering Limited A testing unit for crash barriers
DE19540319C1 (en) * 1995-10-28 1997-04-03 Christa Reiners Test equipment for rigidity of mast anchored into ground
DE19932084A1 (en) * 1999-07-12 2001-02-01 Johannes Habrichs Mast rigidity testing method, evaluating difference between sideways deviations of mast for two different forces applied on mast
EP1416259A2 (en) * 2002-11-02 2004-05-06 Christa Reiners Procedure and device for testing the stability of a pole
CN204461778U (en) * 2015-01-27 2015-07-08 浙江大唐家具有限公司 A kind of seat proving installation with the chair back
KR20170103437A (en) * 2016-03-04 2017-09-13 (주)건설기술원 Device for testing guard post

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