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rotated through angular offset 68 from the original orien-
                                                              tation of axis of symmetry 66. The rotation is shown with
                                                              vertex  82 being the center of rotation, but this need not
                                                              always be the case.
                                                               The reason for the angular offset may be readily discerned
                                                              by studying figure 8. In this view, the reader will observe
                                                              how parabola 56 has been angularly offset. Axis of symme-
                                                              try 66 is angularly offset from central axis 51 of anchor 18.
                                                              A portion of the parabola is then used to define parabolic
                                                              wall 45, which is rotated around central axis 51 to define the
                                                              shape of the internal passage. Inclining the parabola allows
                                                              the creation of tangency point 74 at the neck anchor bound-
                                                              ary (The tangency refers to the parabola being tangent to
                                                              the cable exterior as the cable exits the anchor).
                                                              Cable based vehicle barrier fence
                                                              Pat. 9,303,375 U.S. class 1/1 Int. class E04H 17/04
                                                              Inventor: Jack Gregory Sloane, Boise, ID., Collin Ray Sloan,
                                                              Boise, ID.
                                                              Assignee: SLOAN SECURITY GROUP, INC., Boise, ID.
                                                               This patent presents a vehicle barrier fence for arresting
                                                              an impacting vehicle of substantial mass within a selected
                                                              distance of the fence. The fence having, in part: a retaining
                                                              structure, at least one cable having a first end comprising
         Figure 7: Elevation view, showing a parabola rotated about its vertex   a  cable  terminator,  a  post  having  an  orifice  defined  there
         by an angular offset.
                                                              through sized to receive the cable terminator into the post,
         within mid region 24 is desirable. Transition region 52 has   and a cable retainer for retaining the cable terminator with-
         been identified between neck region 22 and mid region 24,   in the post.
         because the inventors have discovered that the wall slope   Figure 9 illustrates a first exemplary vehicle barrier fence
         within this transition region is significant to the ultimate   120. The vehicle barrier fence 120 is designed to arrest an
         breaking strength of the termination. Transition wall 54 is a   impacting vehicle of substantial mass within a selected dis-
         portion of the profile in which the slope varies in a controlled   tance of the fence 120. The vehicle barrier fence 120 com-
         fashion between the slope of tangent wall 32 and the slope   prises a plurality of terminal posts 100 which are separated
         of shoulder 34.                                      from one another by a desired distance (e.g., ten feet apart,
           It is preferable to have the wall slope over the neck region,   one  hundred  feet  apart, six  hundred  feet  apart). Adjacent
         the transition region, and the mid region controlled by a   posts 100 are interconnected to one another by a plurality
         single function, rather than having to employ multiple func-  of cables 110. The posts 100 preferably connected to each
         tions with tangent conditions at the intersections between   other via from two to six wire ropes (aka “cables”). The num-
         the functions. The inventors have discovered that a parabola   ber of cables needed, and the width and structure thereof,
         can serve well in this capacity, provided that it is appropri-  can vary based upon what fence requirements are needed
         ately manipulated.                                   for a particular installation. The posts function as retain-
           Figure 6 shows parabola 56. It is symmetric about axis   ing structures for anchoring the vehicle barrier fence. Other
         of symmetry 66, which passes through vertex 82. In order   non-post retaining structures could also be used as a “retain-
         to be useful in creating appropriate wall geometry for a re-  ing structure” (e.g., anchoring to a building, anchoring to a
         volved wall profile, it is necessary to rotate the parabola   dead-man anchor, anchoring to a structure).
         shown in figure 6. Figure 7 shows parabola 56 after it is   Some posts can comprise structural posts for supporting
                                                              the cables, which extend therethrough, above a ground sur-
                                                              face, assisting the terminal posts in taking up some of the
                                                              load associated with the vehicle impact, and keeping the ca-
                                                              ble from sagging out of the proper alignment. Support posts
                                                              can utilize a bracket that allows the cable to be supported
                                                              during installation. A cover plate can then be installed to
                                                              keep the cable from separating under vehicle load. Such a
                                                              bracket can be attached to a small post, such as 2” schedule
                                                              40 Steel, set in a concrete footing with u-bolts allowing the
                                                              bracket to be adjusted for elevation. After final cable eleva-
                                                              tion is reached, a self-drilling screw can be inserted through
                                                              the bracket into the post to keep the bracket from slipping.
                                                               Referring  to  figure  10,  illustrated  is  an  end  post  20
                                                              which comprises an internal cavity 20a. The end post 20
                                                              comprising a rectangular post having four side walls, in-
                                                              cluding a first wall 40 and a second wall 42. Each of the
                                                              walls having an outside surface and an inside surface. For
                                                              instance, first wall 40 has an outside surface 47 and an
         Figure 8: Sectioned elevation view, showing the use of a parabola to   inside surface  48.  The  first  wall  40 having at least one
         create a wall profile.                                                                continued on next page

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