460:
232:, usually at equal angles about the structure, in trios and quads. As the tower leans a bit due to the wind force, the increased guy tension is resolved into a compression force in the tower or mast and a lateral force that resists the wind load. For example, antenna masts are often held up by three guy-wires at 120° angles. Structures with predictable lateral loads, such as electrical utility poles, may require only a single guy-wire to offset the lateral pull of the electrical wires, at a spot where the wires change direction.
352:
381:
256:
431:
488:
532:. The anchor must be adequate to resist the maximum tensile load of the guy wires; both the dead load of the tension of the wire and the maximum possible live load due to wind. Since the guy wire exerts its force at an angle, the anchor has both vertical and lateral (horizontal) forces on it. The anchor relies on the lateral shear strength of the soil to resist the forces from all of the guys attached to it. Several types of anchor are used:
549:
center. Modern forms are the plate anchor, in which the guy is attached to a rod with an eyelet extending from the center of a steel plate buried diagonally, perpendicular to the angle of the guy. In the concrete anchor, a diagonal rod with an eyelet extending in the guy direction is cemented into a hole filled with steel reinforced concrete. A sufficiently massive concrete block on the surface of the ground can also be used as a dead man.
541:
324:
32:
406:"Johnny ball" insulators (also called "egg insulators") are usually used. Non-conductive guys of Kevlar fiber (Phillystran) or extruded fiberglass rod are frequently used to not disturb the radiation pattern of the antennas. The strength and low stretch properties of Kevlar fiber approaches that of steel. However, Kevlar is very susceptible to ultraviolet degradation, so it is enclosed in a UV resistant plastic sheath.
129:
369:
320:("Johnny ball"), or a fiberglass guy strain insulator inserted near the top, to ensure that any dangerous voltages do not reach the lower end of the wire accessible to the public. The lower end where the cable enters the ground is often encased in a length of yellow plastic reflector to make it more visible, so that people or vehicles do not run into it.
557:
This type consists of a rod with wide screw blades on the end and an eyelet on the other for the guy wire. It is screwed deep into the ground, at the same angle as the guy, by a truck-mounted drill machine. These are commonly used as guy anchors for utility poles since they are quick to install with
575:
These are used in both soil and rock. A hole is drilled at the angle of the guy. A steel anchor rod with an eye is inserted, and the hole around it is filled with a liquid grout consisting of concrete and an expansion agent or a structural epoxy. When the grout hardens or expands, the anchor is
548:
In this type, a hole is excavated and an object with a large surface area is placed in it with the guy wire attached, and the hole is backfilled with earth or concrete. In the historical form of dead man anchor, a log is buried horizontally in a trench with the guy attached perpendicularly to its
450:
of the mast or for feeding the mast with the radiation power. In these cases, the guys are fixed without an insulator on the mast, but there is at least one insulator in the guy if necessary. If guys are used for feeding the mast with high frequency power it is often possible to use a grounded mast.
442:
AM radio broadcast towers are often fitted with insulators at the mast base and the RF energy is fed at that point. Some are also insulated at the center for feeding the RF energy at that point. Wire rope guys are frequently used and segmented with insulators at several points. Extensive lightning
335:
is often used. In this type the guy line extends diagonally from the top of the pole to a horizontal spar brace extending out from the middle of the pole, and from this it continues vertically to the ground. Thus, the bottom part of the guy is vertical and does not obstruct headroom, so a sidewalk
417:
caused by this static electricity can be several times larger than that generated by the transmitter. In order to avoid dangerous and unpredictable discharges, the insulators must be designed to withstand this high voltage, which on tall masts results in over-dimensioned backstage insulators. At
267:
The guys supporting a sailboat mast are called "standing rigging" and in modern boats are stainless steel wire rope. Guys are rigged to the bow and stern, usually as a single guy. Lateral guys attach to "chain plates" port and starboard attached to the hull. Multiple guys are usually installed
235:
Conductive guy cables for radio antenna masts may disturb the radiation pattern of the antenna, so their electrical characteristics must be included in the design. Usually this conductive guy cables that otherwise would consume up some of the radiation power and radiate it in some other direction
401:
of the antenna. This also applies to guy wires of neighboring masts or metal structures situated nearby. To prevent this, each guy wire is divided by strain insulators into multiple sections, each segment non-resonant at the transmitted wavelength. Cylindrical or egg-shaped
307:
are buried in the ground and have sufficient strength to stand on their own; guys are needed on some poles only to support unbalanced lateral loads due to the utility wires attached to them, or to resist ground movement. Guys are particularly needed on
426:
strikes. The insulators and arrestors must be maintained carefully, because an insulator failure can result in a mast collapse. Egg insulators have the porcelain in compression and if it fails, the end loops of the guy wires are still intertwined.
566:
A rod with a pivoted blade on the end is driven into the earth. When the guy wire is attached and tensioned, its force pulls the blade open, "setting" it into the soil. These are often used by the military for rapid mast installations.
316:) poles, where a long straight section of wire line ends, or angles off in another direction. To protect the public against faults that might allow the cable to become electrified, utility guy cables usually either have a ceramic
236:
than intended. To avoid this, the guy wire gets broken up into a couple of isolated sections that can not act as antennas on their own due to length differences and not being resonant at the transmission frequency.
459:
359:
in North Dakota, the tallest guyed mast in the world. Each guy is one member of a set of three that is located radially around the tower
591:
397:. Conductive metal guy-wires whose lengths are near to quarter wavelength multiples of the transmitted frequency can distort the
475:
may be connected to unwieldy payloads, allowing ground crew to control rotation and swaying while maintaining a safe distance.
96:
694:
115:
68:
692:
75:
704:
53:
343:, a second pole set at an angle in the ground which butts diagonally against the side of the vertical pole.
646:
594:. There are also many structures which consist of a freestanding bottom and a guyed top. These are either
82:
327:
Sidewalk guy with yellow guard, used due to the limited space between the pole and railing to the right
64:
49:
602:, the latter of which may be used temporarily to support tall buildings during their construction.
599:
672:
451:
The power to the guys is fed via wires running from a tuning unit to the feed point on the guys.
42:
268:
with spreaders to help keep the mast straight ("in column"). Temporary guys are also used on a
616:
499:
177:
526:
In ground-anchored guys, the structure which attaches the guy-wire to the ground is called an
595:
213:
422:
in the form of an arc gap is required for the purpose of over-voltage protection in case of
731:
693:
American
Society of Civil Engineers, Subcommittee on Guyed Transmission Structures (1997).
8:
447:
446:
On antennas for long-wave and VLF, the guys may serve an electrical function, either for
331:
In urban areas where the ground area around the pole is restricted, a variation called a
229:
410:
20:
89:
700:
585:
398:
209:
518:
Guys can be used to raise an extension ladder in a technique called a church raise.
393:
Electromagnetic fields from the antennas complicate the design of guys that support
435:
317:
137:
133:
351:
172:
designed to add stability to a freestanding structure. They are used commonly for
726:
468:
221:
197:
430:
380:
293:
277:
255:
173:
666:
720:
611:
419:
394:
250:
386:
AM antenna tower with guys attached through strain insulators at 120° angles
528:
356:
304:
225:
205:
185:
181:
487:
409:
The individual sections of conductive guys can develop large charges of
626:
193:
128:
204:". One end of the guy is attached to the structure, and the other is
423:
403:
289:
260:
169:
16:
Tensioned cable designed to add stability to a freestanding structure
540:
323:
31:
641:
285:
269:
217:
339:
An alternative to guy-wires sometimes used on dead-end poles is a
636:
631:
621:
414:
208:
to the ground at some distance from the mast or tower base. The
201:
544:
Concrete dead man anchor for radio tower guy lines in
Britain
355:
Closeup of anchor end of three guy-wires used to support the
281:
220:
strength of the structure, allows the structure to withstand
463:
Seabees using tag lines to steady a load during a crane lift
273:
189:
368:
296:
is the spar most commonly controlled by one or more guys.
192:. A thin vertical mast supported by guy wires is called a
19:"Guidewire" redirects here. For the software company, see
200:
are frequently of a lattice construction and are called "
276:) attached to and intended to control the free end of a
590:
Historically, guyed structures have been some of the
438:
of type used on utility pole and antenna mast guys.
56:. Unsourced material may be challenged and removed.
696:Design of Guyed Electrical Transmission Structures
718:
558:a truck mounted hydraulic powered auger drive.
443:protection is required for insulated towers.
212:in the diagonal guy-wire, combined with the
699:. USA: ASCE Publications. pp. 21–25.
346:
299:
116:Learn how and when to remove this message
592:tallest man-made structures in the world
539:
458:
429:
350:
322:
254:
127:
336:can pass between the pole and the guy.
719:
688:
686:
684:
682:
668:Garland Fire Academy - "Church Raise"
413:, especially on very tall masts. The
561:
482:
140:- nautical equivalents of guy wires.
54:adding citations to reliable sources
25:
679:
647:Bracing (aeronautics)#Bracing_wires
579:
535:
272:. A fore-guy is a term for a line (
13:
570:
454:
132:A sailboat's mast is supported by
14:
743:
259:Guy (red arrow), controlling the
675:from the original on 2021-12-22.
552:
486:
379:
367:
30:
478:
228:structures. They are installed
41:needs additional citations for
659:
224:such as wind or the weight of
1:
652:
418:each backstage insulator, a
7:
605:
196:. Structures that support
10:
748:
583:
521:
248:
244:
18:
600:additionally guyed towers
374:Guy-wire supported mast.
239:
164:, also called simply a
617:Radio masts and towers
596:partially guyed towers
545:
471:, guy wires, known as
464:
448:capacitive lengthening
439:
360:
347:Antenna mast guy-wires
328:
300:Utility pole guy-wires
264:
141:
543:
462:
433:
354:
326:
258:
249:Further information:
131:
50:improve this article
546:
498:. You can help by
465:
440:
420:lightning arrestor
411:static electricity
361:
329:
265:
142:
21:Guidewire Software
586:Dubai Creek Tower
562:Expanding anchors
516:
515:
467:When operating a
399:radiation pattern
288:with a symmetric
168:, is a tensioned
126:
125:
118:
100:
739:
711:
710:
690:
677:
676:
663:
580:Guyed structures
536:Dead man anchors
511:
508:
490:
483:
436:strain insulator
383:
371:
318:strain insulator
121:
114:
110:
107:
101:
99:
58:
34:
26:
747:
746:
742:
741:
740:
738:
737:
736:
717:
716:
715:
714:
707:
691:
680:
665:
664:
660:
655:
608:
588:
582:
573:
571:Grouted anchors
564:
555:
538:
524:
512:
506:
503:
496:needs expansion
481:
457:
455:Crane tag lines
391:
390:
389:
388:
387:
384:
376:
375:
372:
349:
341:push-brace pole
302:
280:. On a modern
253:
247:
242:
122:
111:
105:
102:
59:
57:
47:
35:
24:
17:
12:
11:
5:
745:
735:
734:
729:
713:
712:
705:
678:
657:
656:
654:
651:
650:
649:
644:
639:
634:
629:
624:
619:
614:
607:
604:
581:
578:
572:
569:
563:
560:
554:
551:
537:
534:
523:
520:
514:
513:
493:
491:
480:
477:
456:
453:
385:
378:
377:
373:
366:
365:
364:
363:
362:
348:
345:
301:
298:
294:spinnaker pole
246:
243:
241:
238:
124:
123:
106:September 2014
38:
36:
29:
15:
9:
6:
4:
3:
2:
744:
733:
730:
728:
725:
724:
722:
708:
702:
698:
697:
689:
687:
685:
683:
674:
670:
669:
662:
658:
648:
645:
643:
640:
638:
635:
633:
630:
628:
625:
623:
620:
618:
615:
613:
612:Guy (sailing)
610:
609:
603:
601:
597:
593:
587:
577:
568:
559:
553:Screw anchors
550:
542:
533:
531:
530:
519:
510:
507:December 2020
501:
497:
494:This section
492:
489:
485:
484:
476:
474:
470:
461:
452:
449:
444:
437:
432:
428:
425:
421:
416:
412:
407:
405:
400:
396:
395:mast antennas
382:
370:
358:
353:
344:
342:
337:
334:
325:
321:
319:
315:
311:
306:
305:Utility poles
297:
295:
291:
287:
283:
279:
275:
271:
262:
257:
252:
251:Guy (sailing)
237:
233:
231:
227:
223:
222:lateral loads
219:
215:
211:
207:
203:
199:
195:
191:
187:
186:utility poles
183:
182:wind turbines
179:
175:
171:
167:
163:
159:
155:
151:
147:
139:
135:
130:
120:
117:
109:
98:
95:
91:
88:
84:
81:
77:
74:
70:
67: –
66:
62:
61:Find sources:
55:
51:
45:
44:
39:This article
37:
33:
28:
27:
22:
695:
667:
661:
589:
574:
565:
556:
547:
527:
525:
517:
504:
500:adding to it
495:
479:Firefighting
472:
466:
445:
441:
434:Cylindrical
408:
392:
357:KVLY-TV mast
340:
338:
333:sidewalk guy
332:
330:
313:
309:
303:
266:
234:
226:cantilevered
165:
161:
157:
153:
149:
145:
143:
112:
103:
93:
86:
79:
72:
60:
48:Please help
43:verification
40:
732:Guyed masts
214:compression
178:radio masts
721:Categories
706:0784402841
653:References
627:Turnbuckle
584:See also:
473:tag lines,
194:guyed mast
174:ship masts
76:newspapers
65:"Guy-wire"
424:lightning
404:porcelain
290:spinnaker
261:spinnaker
673:Archived
642:Gin pole
606:See also
576:secure.
310:dead-end
286:sailboat
284:-rigged
270:sailboat
230:radially
218:buckling
206:anchored
198:antennas
158:down guy
154:guy-rope
150:guy-line
146:guy-wire
637:Ferrule
632:Shackle
622:Tie rod
522:Anchors
415:voltage
245:Sailing
210:tension
134:shrouds
90:scholar
727:Cables
703:
529:anchor
314:anchor
292:, the
202:towers
188:, and
92:
85:
78:
71:
63:
469:crane
282:sloop
263:pole.
190:tents
170:cable
160:, or
138:stays
97:JSTOR
83:books
701:ISBN
278:spar
274:rope
240:Uses
216:and
162:stay
136:and
69:news
598:or
502:.
166:guy
52:by
723::
681:^
671:.
184:,
180:,
176:,
156:,
152:,
148:,
144:A
709:.
509:)
505:(
312:(
119:)
113:(
108:)
104:(
94:·
87:·
80:·
73:·
46:.
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
