Cable tray compression member

Abstract

The invention is entitled "Cable Tray Compression Member". The present disclosure relates to a compression member for a cable tray. The compression member can be configured for high wind conditions. The compression member includes a support clamp for clamping to a support member, and a compression arm for holding the cable tray to the support member.

Description

Technical Field

[0001] This disclosure relates to clamping components for cable trays. Background Technology

[0002] Cable trays are typically supported by a series of parallel supports (e.g., struts, C-channels, I-beams, etc.) that are suspended and spaced apart along the longitudinal direction of the cable tray. The cable tray rests on these supports and is held in place by clamps attached to them. These clamps are designed to hold the cable tray to the supports and prevent lateral displacement of the cable tray relative to the supports. Two types of clamps are common in the industry: one type acts as a clamp to rigidly clamp the cable tray against the corresponding support; and the second type acts as a guide to loosely hold the cable tray to the support, allowing the cable tray to thermally expand and contract due to temperature changes. These clamps may not be suitable for high-load applications, such as high-wind applications. Instead, in such applications, penetrating fasteners may be required to secure the cable tray to the support. For example, fasteners may be driven through the lower flange of the cable tray's guide rails and driven into the support. Attached Figure Description

[0003] Figure 1 This is a perspective view of a cable tray held on a transverse support by a pair of clamping members disclosed herein.

[0004] Figure 2 This is an enlarged perspective view of the clamping component.

[0005] Figure 3 This is an exploded perspective view of the clamping component.

[0006] Figure 4 yes Figure 1 The enlarged segment image shows a clamping element in a clamping configuration.

[0007] Figure 5 yes Figure 4 Side view.

[0008] Figure 6 yes Figure 4 Front view.

[0009] Figure 7 yes Figure 1 The enlarged segment image shows another clamping element in the guide configuration.

[0010] Figure 8 yes Figure 7 Side view.

[0011] Figure 9 yes Figure 7 Front view.

[0012] Figure 10 This is a perspective view of a cable tray held on a transverse support by a pair of clamping members according to another embodiment of this disclosure.

[0013] Figure 11 This is an enlarged perspective view of the clamping component.

[0014] Figure 12 This is an exploded perspective view of the clamping component.

[0015] Figure 13 This is a front view of a clamping element in a clamping configuration.

[0016] Figure 14 This is a front view of a clamping element in the guide configuration.

[0017] Figure 15 This is the first side view of the clamping component.

[0018] Figure 16 This is the second side view of the clamping component.

[0019] Throughout the accompanying drawings, corresponding reference numerals indicate the corresponding parts. Detailed Implementation

[0020] This disclosure relates to clamping members for cable trays configured to hold cable trays onto supports. In one embodiment, the clamping member is non-penetrating (i.e., the clamping member does not extend through the cable tray or support) and is configured for high-load applications, such as high-wind applications. In the same or another embodiment, the clamping member may be configured to hold the cable tray onto an I-beam or other beam with flanges. The clamping member may be configured to clamp or otherwise attach to the flanges of the I-beam. In the same or another embodiment, the clamping member may be configured between a clamping configuration and a guide configuration, in which the clamping member engages or contacts the rails of the cable tray and functions as a clamp, and in the guide configuration, the clamping member functions as a guide allowing the cable tray to make some kind of movement (e.g., expansion) relative to the support.

[0021] Throughout the accompanying drawings, clamping elements having each of the aforementioned features are generally indicated by reference numeral 10. See also Figure 1A pair of clamping members 10 are used to hold the cable tray (generally indicated by 12) onto a support (generally indicated by 14). In the illustrated embodiment, the support 14 is an I-beam with an upper flange 18. The illustrated cable tray 12 is of the type comprising a pair of generally parallel side rails (each side rail generally indicated by 20) interconnected by a series of parallel, spaced-apart transverse members 22. The cross-sectional shape of the rails 20 may vary depending on the type of cable tray 12. For example, the rails 20 shown are I-beams (e.g., aluminum I-beams), each I-beam having a vertical web 24 and upper and lower horizontal flanges (indicated by 25 and 26) extending laterally outward from the web (e.g., on opposite sides of the web). The cable tray 12 can be adapted to carry various types of conduits. For illustrative purposes, one clamping member 10 is shown in a clamp configuration (also as...). Figures 4 to 6 (as shown), and another clamping member 10 is shown in a guide configuration (also as shown) Figures 7 to 9 (As shown). It should be understood that in use, each clamping element will typically be in the same configuration.

[0022] See Figure 2 and Figure 3 The clamping member 10 shown includes a support clamp (generally indicated by 27) and a clamping arm (generally indicated by 28) fixed to the support clamp. The support clamp 27 includes a body 30, an insert 32, and one or more upper threaded fasteners 34 and lower threaded fasteners 35. In the arrangement shown, the body 30, insert 32, and threaded fasteners 34, 35 are all independent components. However, other configurations are possible. The insert 32 is a locating screw bar that cooperates with the body 30 to support one or more threaded fasteners 35. Specifically, the insert 32 receives two threaded fasteners 35 and transfers the load from the fasteners to the body 30. The fasteners 34, 35 secure the body 30 to the beam or other support 14, thereby providing a multi-point (e.g., three-point) mechanical connection between the clamping member 10 and the beam. The upper fastener 34 also secures the clamping arm 28 to the body 30 of the support clamp 27. The upper fastener 34 and the lower fastener 35 may be aligned with each other in the longitudinal and / or transverse directions of the clamping member 10, or the fasteners 34 and 35 may be offset from each other.

[0023] See still Figure 2 and Figure 3The main body 30 typically includes a bottom wall 40. The main body 30 also includes a first side wall 42 and a second side wall 44. The first side wall 42 extends upward from the bottom wall 40, and the second side wall 44 extends upward from the bottom wall 40. The first side wall 42 and the second side wall 44 may be mirror images of each other. A first top wall 46 extends inward from the upper portion of the first side wall 42, and a second top wall 48 extends inward from the upper portion of the second side wall 44. The main body 30 shown is hollow and has a generally rectangular cross-sectional shape. Preferably, the first top wall 46 and the second top wall 48 overlap each other at least along their majority (e.g., substantially entirely).

[0024] The terms “top,” “bottom,” “side,” etc., are used only to provide a frame of reference for this written description. The structures and components described herein may be installed in any particular orientation, and therefore the use of these terms should not be construed as limiting in any way. Other relative or directional terms may be used herein. These terms are used in the context of the particular orientation shown and should not be construed as limiting the structure to the orientation shown in actual use.

[0025] The main body 30 may be formed from a single sheet or plate of material. In other words, the main body 30 is preferably formed as a monolithic or single-piece structure, and each of the walls 40, 42, 44, 46, and 48 is integrally related. In other words, each of the adjacent walls (e.g., the top wall 40 and the first side wall 42) is connected at a bend. Other configurations are possible.

[0026] The first sidewall 42 has an elongated first slot 52 extending through its edge 54. Similarly, the second sidewall 44 has an elongated second slot 56 extending through its edge 58. The slots 52 and 56 are preferably aligned vertically and open in the same direction, such that the body 30 defines a jaw-like shape with an opening configured to receive, for example, a flange 18 of an I-beam 14. When viewed from the side, the slots 52 and 56 may generally define an L-shape or a J-shape. A first (preferably rectangular) portion 60 of each of the slots 52 and 56 is configured to receive a flange of a beam or part of another support member 12. The size and shape of the second (preferably rectangular) portion 62 of each of the above respective slots 52 and 56 are set to receive an insert 32. The second portion 62 opens into the first portion 60 of each slot 52 and 56. A support surface or shoulder 64 is defined at the junction between the first portion 60 and the second portion 62 of each slot 52 and 56, such that a portion of the insert 32 can rest on the shoulder during assembly. The first portion 60 and the second portion 62 may each be formed by a separate slot or opening.

[0027] The bottom wall 40 has a pair of holes 68, 70, which are sized to accommodate the fastener 35 and are preferably, to a certain extent but not significantly, larger than the outer diameter of the axial portion of the fastener 35. Therefore, the holes 68, 70 restrict the radial movement of the fastener 35. Preferably, the holes 68, 70 are defined by relatively smooth walls. That is, preferably, the holes 68, 70 are not threaded.

[0028] The insert 32, which may be referred to as a locking lever, is generally elongated and rectangular, with a first end positioned in a second portion 62 of slot 52 and a second end positioned in a second portion 62 of slot 56. The insert 32 is generally perpendicular to the sidewalls 42, 44 and rests partially on the shoulder 64. The insert 32 has one or more threaded holes to receive a threaded fastener 35. Preferably, the insert 32 has a pair of threaded holes 76 and 78 adjacent to the sidewalls 42 and 44, respectively, and these threaded holes are aligned with holes 68 and 70, respectively, when the insert 32 is positioned in the body 30. Therefore, the threaded fastener 35 preferably passes through the corresponding holes in holes 68, 70 and engages the corresponding threaded holes in threaded holes 76, 78 by thread. With the insert 32 partially resting on the shoulder 64, and the threaded fastener 35 engaging the holes 68, 70 of the insert 32 and the body 30 to inhibit significant movement of the threaded fastener 35, the insert 32 is preferably held in place within the second portion 62 of the slots 52, 56. That is, the interaction between the threaded fastener 34 and the holes 68, 70 constrains the front end of the insert 32 to rotate in a downward direction, thereby preventing the insert 32 from being removed from the second portion 62 of the slots 52, 56. Conveniently, the insert 32 remains in place even when the threaded fastener 35 has retracted to facilitate the assembly of the anti-sway bracket attachment 10 to the bracket, as further described herein.

[0029] The first top wall 46 has a first opening 80 and the second top wall 48 has a second opening 82, the first opening and the second opening being aligned with each other. Figure 6 and Figure 9In the illustrated arrangement, the first opening 80 and the second opening 82 are also aligned with the openings 68, 70 of the top wall 40 in a forward-backward direction. Preferably, the openings 80, 82 are centered or substantially centered in the width direction of the body 30. The first opening 80 and the second opening 82 are configured to receive threaded fasteners 34. One of the first opening 80 and the second opening 82 may be threaded, and the other may be unthreaded. In the illustrated arrangement, the first opening 80 of the first top wall 46 (i.e., the upper one of the top walls 46, 48) is threaded, and the second opening 82 of the second top wall 48 (i.e., the lower one of the top walls 46, 48) is either unthreaded or unthreaded. However, in other arrangements, this order may be reversed, or both openings 80, 82 may be threaded. The presence of the threaded fasteners 34 within the openings 80, 82 inhibits or prevents significant relative movement between the first top wall 46 and the second top wall 48. Specifically, lateral movement of the top walls 46, 48 is suppressed or substantially prevented to suppress or substantially prevent expansion of the top walls 46, 48 and side walls 42, 44 of the body 30, thereby maintaining the strength of the clamping member 10. Therefore, the dimensions of the unthreaded openings 80 or 82 (if present) are set relative to the outer diameter of the axial portion close to the fastener 34. While the fastener 34 may be configured as a means of engaging the top walls 46, 48 to suppress or at least substantially prevent expansion of the bottom walls 46, 48, other suitable mechanisms may also be used for this purpose, including fasteners that do not contact the flanges (e.g., rivets, screws), clamps, welding, interference structures, and other suitable arrangements for securing the top walls 46, 48 relative to each other.

[0030] In the illustrated arrangement, the threaded fastener 34 (i.e., the threaded fastener passing through the upper walls 46, 48) comprises a nut / washer assembly 90 that engages the threaded shaft portion of the fastener 34 via threaded engagement. Alternatively, the threaded fastener 34 may comprise a nut without a washer or a separate nut and washer.

[0031] The clamping arm 28 of the clamping member 10 includes a base 92 having a first longitudinal end and a second longitudinal end. The base 92 may be generally rectangular in shape. Opposite first wings 94 and second wings 96 extend generally transversely to the longitudinal axis of the base 92 from their respective first and second ends. The inner surfaces of the base 92 and the wings 94, 96 together define a generally U-shape, and their dimensions and shapes are configured to nest on the top of the support clamp 27, specifically, on the top of the top wall 46 of the support clamp 27. Fastener openings 98 extend through the base 92 and are generally aligned with openings 80, 82 in the top walls 46, 48, respectively.

[0032] The first wing 94 extends further downward than the second wing 96 to define the clamping portion. The clamping portion is configured to engage and clamp the lower flange 26 of the guide rail 20. In the illustrated embodiment, the clamping portion extends downward at an angle of approximately 90 degrees relative to the base 92, but it should be understood that the clamping portion may extend downward at various angles. Figures 4 to 6 The clamping member 10 is shown mounted in a clamping configuration, wherein a portion of the base 92 covers the lower flange 26 of the cable tray 12, and the first wing 94 clamps into the flange 26 of the cable tray 12, thereby holding the guide rail 20 of the cable tray 12 in a fixed position relative to the support member 14.

[0033] See Figures 7 to 9 As shown, the second wing 96 constitutes a guide. In this configuration, the second wing 96 is not clamped to the guide rail 20 to allow the guide rail to freely expand and contract longitudinally relative to the support. The length of the second wing 96 is preferably sufficient to allow the second wing 96 to clear (but only slightly clear) the bead adjacent to the outer edge of the lower flange 26. Thus, the length of the second wing 96 is generally shorter than the length of the first wing 94.

[0034] If it can be Figures 4 to 9 As understood and observed, clamping arm 28 can be configured as a fixture in the following ways ( Figure 6 ) or bootloader configuration ( Figure 9 Orientation: The clamping arm 28 is rotated only about a transverse axis that extends transversely to the length of the clamping member 10 and through the opposing surfaces of the clamping member 10, such that the clamp (first wing 94) engages the guide rail 26 or the guide (second wing 96) extends above the guide rail 26. There is no need to reverse or flip the clamping arm 28. This makes it easier and faster for the installer to orient the clamping member. To further enhance ease of use for the installer, the base 92 of the clamping arm 98 may include a mark 104 to indicate which side (i.e., which of the first wing 94 and the second wing 96) is used as the clamp configuration and which side is used as the guide configuration. This mark 104 may also be included on any other part of the clamping member 10 (e.g., on the first wing 94 and the second wing 96) to indicate the correct orientation to the installer.

[0035] The body 30, insert or locking lever 32, and clamping arm 28 may be made of hot-rolled low-carbon steel to meet the standards set by Underwriters Laboratories (UL), Factory Mutual Engineering (FM), or other such quality control groups, but other suitable materials may also be used. Additionally, the body 30 and insert 32 may have a natural or electro-galvanized finish.

[0036] Threaded fasteners 34 and 35 may also be referred to herein as locating screws. Preferably, each threaded fastener 34 and 35 has a head portion and a threaded portion. As described above, the threaded fastener 35 extends through holes 68 and 70 and is threaded into holes 76 and 78 of the insert 32, thereby capturing the insert 32 within slots 52 and 56. The locating screw 35 is long enough to be threaded through the insert 32 to engage flanges or other structures located in slots 52 and 56. Another locating screw 34 preferably extends through holes 80 and 82 of the upper walls 46 and 48 and hole 98 of the clamping arm 28, respectively. This locating screw 34 is long enough to engage flanges or other structures located in slots 52 and 56. Each of the locating screws 34 has an end, which is preferably in the form of a relatively sharp conical point for engaging flanges or other structures. The conical point facilitates deformation of the locating screw 34 within the flange or other structure, increasing the engagement of the locating screw 34 within the flange or other structure, thereby inhibiting or preventing slippage of the locating screw 34. The conical point does not necessarily need to be sharp. A small, flat surface at the end is permissible. Preferably, any flat surface at the end 96 is less than about 0.05 inches, less than about 0.04 inches, or less than about 0.031 inches. In other arrangements, the end may be a cup point or other type of end structure, if desired or desired.

[0037] The screw head may be adapted to break at a specific torque level or within a specific torque range, which may be a threshold or a predetermined torque level or range. This feature is a convenient method for ensuring that the locating screw 34 has been properly torsioned or tightened. A portion of the shaft of the locating screw 34 may include a reduced cross-sectional area. The reduced cross-sectional area may have a specific minimum diameter (or a non-circular cross-sectional dimension) selected based on material properties, heat treatment, and / or other relevant factors, such that the screw head will break at a specific torque level, which may be a specific minimum value or a range of values. In one or more embodiments, the screw head may not be configured to break.

[0038] In the illustrated embodiment, the body 30 is approximately 0.25 inches thick. The overall peak dimensions of the body 30 are approximately 3.5 inches high, 2.375 inches wide, and 3 inches long. The lower wall 40 is preferably approximately 2.375 inches wide and the inner surfaces of the side walls 42 and 44 are spaced approximately 1.875 inches apart. The side walls 42 and 44 preferably have a peak height of approximately 3.5 inches. The first portion 60 of slots 52 and 56 has dimensions of approximately 1.5 inches by approximately 0.9 inches (length by height). With these dimensions, the clamping member 10 can be used with a flange with a thickness between approximately 3 / 8 inch and 7 / 8 inch. The second portion 62 of slots 52 and 56 has dimensions of approximately 1.031 inches by approximately 0.39 inches (length by height). The rear ends of the first portion 60 and the second portion 62 are offset from each other, such that the shoulder 64 has a length of approximately 0.156 inches. The lower portions of the bottom wall 40 and side walls 42, 44 below slots 52, 56 have a length of approximately 2.75 inches (in the forward-backward direction). The upper portions of the top walls 46, 48 and side walls 42, 44 above slots 52, 56 have a length of approximately 3 inches. Therefore, the lower portions of the edges 54, 58 of the side walls 42, 44 below slots 52, 56 are offset in the backward direction by approximately 0.25 inches in the forward-backward direction from the upper portions of the edges 54, 58 of the side walls 42, 44 above slots 52, 56. The length of the first portion 60 of slots 52, 56 is measured from the upper portions of edges 54, 58. The upper top wall 46 has a width of approximately 1.841 inches and a length of approximately 3 inches. The lower top wall 48 has a width of approximately 1.966 inches and a length of approximately 3 inches. The vertical clearance between the upper top wall 46 and the lower top wall 48 is approximately 0.063 inches. Holes 68 and 70 have a diameter of approximately 0.531 inches. The centers of holes 68 and 70 are spaced approximately 0.891 inches behind the front edge of the bottom wall 40, approximately 1.313 inches apart from each other, and approximately 0.531 inches apart from the side edge of the top wall 40. The centers of holes 80 and 82 are spaced approximately 1.141 inches from the front edges of the top walls 46 and 48, and are substantially centered along the transverse direction of the walls 46 and 48 and / or along the centerline of the body 30. Threaded hole 80 has a diameter of approximately 0.5 inches, and unthreaded hole 82 has a diameter of approximately 0.563 inches.

[0039] The insert 32 may be approximately 0.375 inches thick, approximately 1 inch wide (in the forward-backward or longitudinal direction of the assembled anti-sway bracket attachment 10), and approximately 2.5 inches long (in the lateral or width direction of the clamping member 10), allowing it to fit comfortably into the second part 62 of slots 52, 56, and causing the sidewalls 42, 44 to extend slightly outward when the insert 32 is placed in the body 30. The spacing between threaded holes 76 and 78 may be approximately 1.313 inches, setting them to substantially align with holes 68 and 70, respectively. Threaded holes 76, 78 include standard 1 / 2-inch female threads.

[0040] Each locating screw 34 has a threaded portion comprising a standard 1 / 2-inch thread. The axial portion of the locating screw 34 (including the threaded portion, end, and reduced cross-sectional portion) may be approximately 2.5 inches long, allowing the taper point to extend into the area defined between slots 52 and 56. The reduced cross-sectional portion may have a length of approximately 0.188 inches. The locating screw 34 may be made of hardened carbon steel, but other suitable materials may also be used. Of course, those skilled in the art will recognize that these and other dimensions presented herein illustrate a preferred embodiment, and alternatively, the dimensions of this disclosure may be efficiently set as needed or desired.

[0041] The clamping member 10 is capable of withstanding large forces in multiple directions. For example, the clamping member 10 is capable of withstanding large forces applied transversely to the longitudinal axis of the cable tray 12 and transversely to the axis of the support member 14, away from the support member (“cable tray pull-out” loads). The clamping member 10 is also capable of withstanding large forces applied transversely to the longitudinal axis of the cable tray 12 and along the longitudinal axis of the support member 14 (“cross-cable tray” loads). In any or both of the fixture configuration and guide, the cable tray pull-off load and the cross-cable tray load may exceed 2,000 lbf (8,896 N), exceed 2,250 lbf (10,008 N), exceed 2,500 lbf (11,121 N), exceed 2,750 lbf (12,233 N), exceed 3,000 lbf (13,345 N), exceed 3,250 lbf (14,457 N), or exceed 3,500 lbf (15,569 N), for example, 2,000 lbf to 5,500 lbf (8,896 N to 24,600 N). 88N), 2,250 lbf to 5,500 lbf (10,008N to 24,688N), 2,500 lbf to 5,500 lbf (11,121N to 24,688N), 2,750 lbf to 5,500 lbf (12,233N to 24,688N), 3,000 lbf to 5,500 lbf (13,345N to 24,688N), 3,250 lbf to 5,500 lbf (14,457N to 24,688N), 3,500 lbf to 5,500 lbf (15,569N to 24,688N).

[0042] This document also provides a method for securing a cable tray to a support member, enabling the cable tray to withstand high forces. The method typically involves positioning the clamping member 10 in the correct configuration (i.e., a clamp configuration or guide configuration) relative to the lower flange 26 of the guide rail 20 of the cable tray 12, and allowing the slots 52 and 56 of the support clamps 27 to slide over the support member 14 above the flange 18, such as... Figure 1As shown. The lower positioning screw 35 (i.e., the positioning screw of the engaging insert 32) is inserted through corresponding holes 68 and 70 in the body 30 and threaded into holes 76 and 78 in the insert 32 until the conical point of the positioning screw 35 contacts the flange. The positioning screws 35 can be tightened until their heads break off, thereby securing the positioning screws 35 in contact with the flange. Before or after inserting the positioning screws 35, the clamping arm 28 is aligned with the support clamp 28, and the upper positioning screw 34 is inserted through fastener openings 80, 82, and 98. The upper positioning screw 34 (e.g., the positioning screw of the engaging body 30) is tightened until its head breaks off. This results in the clamping member 10 being securely fastened to the flange 18 of the support member 14. As described above, the arrangement of the upper positioning screw 34 and the lower positioning screw 35 increases the engagement of the clamping member 10 on the flange 18 of the support member 14 to increase resistance to overturning (rotation) of the clamping member 10. This method allows the cable tray to withstand the forces described herein.

[0043] See Figures 10 to 16 Another embodiment of the clamping member capable of withstanding strong forces in multiple directions, as described above, is generally indicated by reference numeral 110. The clamping member typically includes a support clamp (generally indicated by 120) and a clamping arm (generally indicated by 125) coupled to the support clamp. The support clamp includes a clamp body 121, a locating screw rod 122 coupled to the body, and at least one locating screw 124 (e.g., two or more locating screws) coupled to the locating screw rod. The body 120 shown is generally C-shaped or channel-shaped, although it may have other shapes. The body 121 shown includes a rear wall 128 and opposing left and right side walls (generally indicated by 130a and 130b, respectively) extending forward from the rear wall. The rear wall 128 and the side walls 130a and 130b together define an open channel 129 having open upper and lower ends and an open front side. In the illustrated embodiment, the body 120 is integrally formed as a single, monolithic component. For example, the body 120 may be made of a sheet of metal (such as steel or other metals), which will be obvious to those skilled in the art.

[0044] Left side wall 130a and right side wall 130b define slots 138a and 138b, respectively, extending toward rear wall 128 through the front portion of the respective side wall. Slots 138a and 138b are generally aligned and opposite each other, and their dimensions and shape are configured to receive flanges (or other portions) of structural supports (e.g., flanges of beams such as I-beams). Therefore, left side wall 130a and right side wall 130b may be generally C-shaped. Left side wall 130a and right side wall 130b include upper arms 140a and 140b and lower arms 142a and 142b on opposite sides of the respective slots 138a and 138b. Figure 12As indicated, the upper surfaces 144a, 144b of the left side wall 130a and right side wall 130b (e.g., the upper surfaces of the upper arms 140a, 140b) are chamfered or beveled towards the front of the anti-sway bracket 110. The clamping arm 125 sits on these upper surfaces 144a, 144b, as explained in more detail below, such that the clamping arm is tilted or tilted forward laterally towards the attachment 110.

[0045] like Figure 12 As shown, sidewalls 130a and 130b (e.g., upper arms 140a and 140b) respectively define aligned and opposing openings 148a and 148b disposed above slots 138a and 138b. The openings 148a and 148b are sized and shaped to receive and capture the positioning screw rod 122 therein. In the illustrated embodiment, the openings 148a and 148b are generally rectangular, similar to the positioning screw rod 122, having an area slightly larger than the cross-section of the rod, such that the positioning screw rod can be slidably received therein and captured. The openings 148a and 148b are configured such that when the rod 122 is received therein, the rod tilts or leans laterally downward toward the front side of the attachment 10. Thus, as Figure 15 As best shown, the plane P2 of the rod 122 is angled relative to the axis A3 of the slots 138a, 138b. For example, the angle of the rod 122 may be between about 10 degrees and about 60 degrees, or about 15 degrees to about 30 degrees, or about 15 degrees in one example. When coupled to the sidewalls 130a, 130b, the opposite end portions of the locating screw rod 122 extend outward from the corresponding sidewalls 130a, 130b (e.g., the upper arm of the corresponding sidewall). The opposite ends of the rod 122 define an opening 150 configured to receive the locating screw 152. The opening 150 shown is threaded to receive the locating screw 152 by thread. The axis A4 of the opening 150 (and the axis of the fastener, indicated by the same reference numerals) extends at an acute angle (i.e., less than 90 degrees) from the longitudinal axis of the rod 122 and the axis A3 defined by the slots 138a, 138b to enhance the strength of the connection with beams or other structural supports. Thus, the locating screw 124 engages the flange and channel 129 of the structural support outside the body 120 at an angle of less than 90 degrees (i.e., an acute angle) when the threaded connection passes through the opening 150. For example, the locating screw 124 may engage the flange at an angle of about 85 degrees to about 60 degrees, or about 80 degrees to about 75 degrees. The locating screw 124 may have a torque-breaking head that shears off from the screw after a predetermined or threshold amount of torque is applied to the head.

[0046] Similar to the first embodiment of the clamping arm 28, this embodiment of the clamping arm 128 includes a base 192 having a first longitudinal end and a second longitudinal end. The base 192 may be generally rectangular in shape. Opposite first wings 194 and second wings 196 extend generally transversely to the longitudinal axis of the base 192 at their respective first and second ends. The inner surfaces of the base 192 and the wings 194, 196 together define a generally U-shape, and their dimensions and shapes are set to nest on top of the body 120, specifically, to sit or rest on the upper surfaces 144a, 144b. A fastener opening 198 (e.g., a non-threaded opening) extends through the base 192 and is substantially aligned with a threaded center opening 180 in the locating screw shank 122, such that a threaded fastener 126 extends through the fastener opening 198 and is threaded into the opening 180 in the locating screw shank to engage the clamping arm 128 to the locating screw shank 122 and to position the clamping arm relative to the lower flange 26. Furthermore, a locating screw 124 extends through the opening 182 (e.g., a non-threaded opening) in the base 192 and is threaded into the threaded opening 150 in the locating screw shank 122 to secure the support clamp 120 to the support member 18. The axis A4 of the opening 150 (and the axis of the fastener, indicated by the same reference numerals) extends at an acute angle (i.e., less than 90 degrees) from the longitudinal axis of the base 192 of the clamping arm 122 (and the shank plane P2) to enhance the strength of the connection to beams or other structural supports.

[0047] When fixed to the body 120, the clamping base 192 tilts or tilts downward toward the front of the clamping member 110. Thus, the plane P3 of the base 192 forms an angle with respect to the axis A3 of the slots 138a, 138b. For example, the angle of the base 192 may be between approximately 10 degrees and approximately 60 degrees, or approximately 15 degrees to approximately 30 degrees, or approximately 15 degrees in one example. The first wing 194 and the second wing 196 extend from the longitudinal axis (and plane P3) of the base 192 of the clamping arm 122 at an acute angle (i.e., less than 90 degrees), as shown by axis A4. The ends of the wings 194, 196 also taper to points, but the ends of the wings may be blunt, such that the end portions are parallel to axis A3.

[0048] The first wing 194 extends further downward than the second wing 196 to define the clamping portion. The clamping portion is configured to engage and clamp the lower flange 26 of the guide rail 20. In the illustrated embodiment, the clamping portion extends downward at an acute angle (i.e., less than 90 degrees) from the longitudinal axis (and plane P3) of the base 192 of the clamping arm 122 (and the rod plane P2) to enhance the strength of the connection with the beam or other structural support; however, it should be understood that the clamping portion may extend downward at various angles. Figure 13As shown, the clamping member 110 is shown mounted in a clamping configuration, wherein a portion of the base 192 covers the lower flange 26 of the cable tray 12, and the first wing 194 clamps into the flange 26 of the cable tray 12, thereby holding the guide rail 20 of the cable tray 12 in a fixed position relative to the support member 14.

[0049] See Figure 14 The second wing 196 constitutes a guide. In this configuration, the second wing 196 is not clamped to the guide rail 120 to allow the guide rail to freely expand and contract longitudinally relative to the support. The length of the second wing 196 is preferably sufficient to allow the second wing 196 to clear (but only slightly clear) the bead adjacent to the outer edge of the lower flange 126. Thus, the length of the second wing 196 is generally shorter than the length of the first wing 194.

[0050] If it can be Figure 13 and Figure 14 As understood and observed, the clamping arm 128 can be configured as a fixture in the following ways ( Figure 13 ) or bootloader configuration ( Figure 14 Orientation: The clamping arm 128 is rotated only about a transverse axis extending transversely to the length of the clamping member 110 and through the opposing surfaces of the clamping member 110, such that the clamp (first wing 194) engages the guide rail 126 or the guide (second wing 196) extends above the guide rail 126. There is no need to reverse or flip the clamping arm 128. This makes it easier and faster for the installer to orient the clamping member. To further enhance ease of use for the installer, the base 192 of the clamping arm 198 may include a mark 204 to indicate which side (i.e., which of the first wing 194 and the second wing 196) is used as the clamping configuration and which side is used as the guide configuration. This mark 104 may also be included on any other part of the clamping member 110 (e.g., on the first wing 194 and the second wing 196) to indicate the correct orientation to the installer.

[0051] The clamping member 110 is capable of withstanding large forces in multiple directions. For example, the clamping member 110 is capable of withstanding large forces applied transversely to the longitudinal axis of the cable tray 12 and transversely to the axis of the support member 14, away from the support member (“cable tray pull-out” loads). The clamping member 110 is also capable of withstanding large forces applied transversely to the longitudinal axis of the cable tray 12 and along the longitudinal axis of the support member 14 (“cross-cable tray” loads). In any or both of the fixture configuration and guide, the cable tray pull-off load and the cross-cable tray load may exceed 2,000 lbf (8,896 N), exceed 2,250 lbf (10,008 N), exceed 2,500 lbf (11,121 N), exceed 2,750 lbf (12,233 N), exceed 3,000 lbf (13,345 N), exceed 3,250 lbf (14,457 N), or exceed 3,500 lbf (15,569 N), for example, 2,000 lbf to 5,500 lbf (8,896 N to 24,600 N). 88N), 2,250 lbf to 5,500 lbf (10,008N to 24,688N), 2,500 lbf to 5,500 lbf (11,121N to 24,688N), 2,750 lbf to 5,500 lbf (12,233N to 24,688N), 3,000 lbf to 5,500 lbf (13,345N to 24,688N), 3,250 lbf to 5,500 lbf (14,457N to 24,688N), 3,500 lbf to 5,500 lbf (15,569N to 24,688N).

[0052] This document also provides a method for securing a cable tray to a support member, enabling the cable tray to withstand high forces. The method typically involves positioning a clamping member 110 in the correct configuration (i.e., a clamp configuration or guide configuration) relative to the lower flange 26 of the guide rail 20 of the cable tray 12, and allowing slots 130a, 130b of the support clamp 120 to slide over the support member 14 above the flange 18. Fasteners 124 are tightened to secure the support clamp 120 to the flange 18. Fasteners 126 are tightened to position corresponding wings 194, 196 of the clamping arms relative to the lower flange 26 of the guide rail 20.

[0053] In view of the above, it can be seen that several features of this disclosure have been implemented and other advantageous results have been obtained.

[0054] Having described this disclosure in detail, it will be apparent that modifications and variations may be made without departing from the scope of this disclosure as defined by the appended claims. For example, where specific dimensions are given, it should be understood that they are merely exemplary and other dimensions are possible.

[0055] When describing elements of this disclosure or its preferred embodiments, the articles “a,” “an,” “the,” and “the” are intended to indicate the presence of one or more elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that other elements besides those listed may be present.

[0056] Since various changes can be made to the above-described structures, products, and methods without departing from the scope of this disclosure, it is intended that all content contained in the above description and shown in the accompanying drawings should be interpreted as illustrative rather than limiting.

Claims

1. A clamping member for securing a cable tray to a support, the clamping member comprising: A clamping arm configured to hold the flange of the cable tray guide rail on the support without penetrating the flange or the support; A support clamp configured to clamp onto a support member, wherein a clamping arm is coupled to the support clamp, wherein the support clamp includes a clamp body defining at least one slot configured to receive a flange of the support member and a locating screw shank coupled to the clamp body, wherein at least one locating screw is threadedly coupled to the locating screw shank, wherein the at least one slot defines an axis along which the flange is slidably received, and wherein the axis of the at least one locating screw extends at an acute angle relative to the axis of the at least one slot; When a force exceeding 3,000 pounds is applied in one or more of the following directions, the clamping member is able to hold the cable tray on the support during the application of the force: i) Lateral to the longitudinal axis of the cable tray and lateral to the longitudinal axis of the support, away from the support; or ii) Transverse to the longitudinal axis of the cable tray and along the longitudinal axis of the support.

2. The clamping member of claim 1, wherein the positioning screw shank has opposing end portions disposed outside the body, each of the opposing end portions of the positioning screw shank defining a threaded opening extending through the positioning screw shank, the threaded opening being configured to receive a corresponding positioning screw among the at least one positioning screw.

3. The clamping member of claim 1, wherein the clamping body includes a rear wall and opposing left and right side walls extending forward from the rear wall, wherein the at least one slot includes a slot defined by the left and right side walls.

4. The clamping member according to claim 1, wherein the clamp body is channel-shaped, having an open upper end and a lower end as well as an open front side.

5. The clamping member according to claim 3, wherein the upper ends of the left side wall and the right side wall are chamfered downward toward the front side of the body, and wherein the clamping arm is seated on the upper end of the chamfer.

6. The clamping member according to claim 1, wherein the clamping member comprises a first wing and a second wing, the first wing extending a certain length to clamp the lower flange of the guide rail of the cable tray, and the second wing extending a shorter length than the first wing to act as a guide above the lower flange of the guide rail of the cable tray.

7. The clamping member according to claim 6, wherein the axes of the first wing and the second wing extend at an acute angle relative to the axis of the at least one slot.

8. The clamping member according to claim 7, wherein the ends of the first wing and the second wing are tapered.

9. A clamping member for securing a cable tray to a support, the clamping member comprising: A support clamp, the support clamp including a clamp body and a positioning screw bar, the clamp body defining at least one slot configured to receive a flange of the support member, the positioning screw bar being coupled to the clamp body; A clamping arm is connected to the support clamp and includes a first wing and a second wing. The first wing extends a certain length to clamp the lower flange of the guide rail of the cable tray, and the second wing extends a shorter length than the first wing to act as a guide above the lower flange of the guide rail of the cable tray. and At least one locating screw, which is threaded to the locating screw shank and configured to engage the flange of the support member. The clamp body includes a rear wall and opposing left and right side walls extending forward from the rear wall, wherein the at least one slot includes a slot defined by the left and right side walls, and wherein the upper ends of the left and right side walls are chamfered downward toward the front of the body, wherein the clamping arm sits on the upper end of the chamfer.

10. The clamping member of claim 9, wherein the positioning screw bar has opposing end portions disposed outside the clamp body, each of the opposing end portions of the positioning screw bar defining a threaded opening extending through the positioning screw bar, the threaded opening being configured to receive a corresponding positioning screw.

11. A clamping member for securing a cable tray to a support, the clamping member comprising: A clamping arm configured to hold the flange of the cable tray guide rail on the support without penetrating the flange or the support; A support clamp configured to clamp onto a support member, wherein a clamping arm is coupled to the support clamp, wherein the support clamp includes a clamp body defining at least one slot configured to receive a flange of the support member, a locating screw bar coupled to the clamp body, and at least one locating screw threaded to the locating screw bar, wherein the clamp body is channel-shaped, having an open upper end and a lower end and an open front side, and wherein the upper ends of the left side wall and the right side wall are chamfered downward toward the front side of the body, wherein the clamping arm sits on the upper end of the chamfer; When a force exceeding 3,000 pounds is applied in one or more of the following directions, the clamping member is able to hold the cable tray on the support during the application of the force: i) Lateral to the longitudinal axis of the cable tray and lateral to the longitudinal axis of the support, away from the support; or ii) Transverse to the longitudinal axis of the cable tray and along the longitudinal axis of the support.

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