In such cases, the techniques used for the guy assembly, the connection of the guy wire to the anchor, and the tension adjustments must be determined for the detailed installation plan or the appropriate antenna technical manual. For example, preformed wire helical guy grips are sometimes used for attaching guy wires to the adjusting turnbuckles. On some installations, other procedures for tensioning guys may be necessary because of the type of guys and hardware supplied with the antenna. With the tower properly plumbed to a vertical position, only one guy at a given level need be tested with the dynamometer. Step C shows the guy in final position secured in place with clamps. The second coffing hoist is operated until sufficient tension is applied to cause the reading on the series dynamometer to fall off. The lower end of this tackle is provided with a second cable grip that is' attached to the guy tail previously threaded through the turnbuckle. In step B, an additional cable grip and hoist or tackle are attached above the cable grip shown instep A. A turnbuckle is shown in position to receive the guy tail. With gripping teeth could penetrate and damage the protective coating of guy cables and should not be used In step A of figure 8-38, the coffing hoist is shown in series with a dynamometer to measure the tension.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |