| 主权项 |
1. A perimeter security barrier comprising a pair of spaced apart end posts rigidly fixed in the ground, a plurality of intermediate posts disposed between the end posts fixed in or on the ground, at least one wire rope between the end posts unwoven relative to the plurality of intermediate posts and at least one further wire rope woven relative to the plurality of intermediate posts, wherein the end posts, the plurality of intermediate posts, the at least one woven wire rope and the at least one unwoven wire rope define a plane of the barrier, the barrier being capable of arresting a vehicle impacting the barrier from a predetermined direction substantially perpendicular to, or between 25 and 90 degrees relative to, said plane of the barrier and said at least one unwoven rope is disposed only on a side of said intermediate posts to face said predetermined direction, and wherein the at least one unwoven wire rope and the at least one woven wire rope are secured at each end to respective end posts, and energy absorption means are provided at said each end for absorbing energy transmitted by the at least one unwoven wire rope and the at least one woven wire rope from the impacting vehicle, and further comprising a plurality of hooks each configured to retain one of the at least one unwoven wire rope and the at least one woven wire rope on one of the plurality of intermediate posts, respectively,
wherein the plurality of hooks include an angle configured to retain the respective unwoven and woven wire ropes through an angle of inclination of the plurality of intermediate posts of 10 degrees as a result of the vehicle impact pushing the plurality of intermediate posts back, and wherein the angle of the hook is further configured to allow the respective unwoven and woven wire ropes to separate from the plurality of intermediate posts when the plurality of intermediate posts are pushed back further to increase the angle of inclination to up to 40 degrees as the result of the vehicle impact. |
