GUYED TOWER INSTALLATION TIPS
Introduction
This document is a compilation of written commentaries by many people. As such, it is meant to be a reference resource to find the opinions and experiences of our peers about topics related to communication towers. It is not an ultimately authoritative compendium of all knowledge on the subjects, so care should be exercised in applying its contents.
The original editor, Mark Lowell, N1LO, started this collection of tower related information by painstakingly sifting through the archives of the TowerTalk reflector. Below are Mark's comments from his website.
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GUYED TOWER TOPIC SUMMARY - Still under construction.. Version: 01-19-2000
Check for the latest update The existence, accuracy, content and organization of any section may change at any time as new discoveries, understandings, and concepts arise. I add new sections whenever appropriate.
By Mark D. Lowell, N1LO. First posted in November 1998
This document is a series of notes that I have made concerning guyed towers and installation that started after reading and digesting the message archives of the TowerTalk forum sponsored by the folks at . The archive is located at:
I have also combined ideas from other readings and personal experiences as well. I have paraphrased some subjects after reading the general consensus of many messages. In other cases, the originators of these messages have already addressed the topic in the most eloquent form, and I have simply copied their messages here.
I have concentrated mainly on subjects relating to standard, Rohn, guyed towers, and not crankup or self-supporting types. I most whole-heartedly agree with an opinion once expressed on the TowerTalk reflector: "There is nothing stronger, safer, or more cost effective than a good guyed tower."
***WARNING*** Tower climbing can be hazardous to your health! You can hurt yourself and others very easily while engaging in climbing and rigging. The information here is provided on an as-is basis and, naturally, I can assume no responsibility for your safety, or how you interpret or implement the techniques I have described here. Do not perform a procedure that you are not comfortable with. Think ahead, get familiar with all of your materials, and teach the people assisting you about the methods and dangers. Again, in all matters, *you* are the one who is the most in control of your own safety. A complete understanding of both the risks you take, and the solutions available to you, are the best tools at your disposal. I bid you safe journeys. ***WARNING*** This is a work in progress, growing as I gather information from individual postings by experienced professionals and amateurs in many walks of life, from all over the globe, and from my own personal experiences. I present it for personal use and benefit of all who read it and find something
of value. I have nothing to gain from this except the joy of learning itself, and the satisfaction of helping others. And, of course, it will help me put up my own tower!
If this information has helped you, I would enjoy receiving a QSL card or email from you.
Mark, N1LO - n1lo@
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Pat Thurman, K7KR, added considerable effort to take the original plain text version and convert it to .PDF format with hyperlinks to make it a very user friendly resource.
Both N1LO and K7KR have given permission for their work to be made available on the K7NV web site. Kudos go to Mark and Pat for doing such a fine job, and THANKS!
It is my hope that this document continues to grow in its scope and depth of collected knowledge about tower related things. Those wishing to contribute more knowledge to this collection may contact k7nv@
73, Kurt, K7NV
GUYED TOWER TOPIC SUMMARY
GUIDES
7
TOWER CONSTRUCTION GUIDES
7
TOWER ENGINEERING GUIDES
7
LIGHTNING PROTECTION AND GROUNDING GUIDES
7
CLIMBING GUIDES
9
TOWER TYPE SELECTION
9
BRACKET SUPPORTS
9
BASES
9
SELECTING BASE TYPE
9
DIGGING THE HOLE
10
THE RE-BAR CAGE
11
THE CONCRETE
12
CONCRETE DO'S AND DON'TS
13
CONCRETE STRENGTH
14
MAST AND BOOM MATERIAL SELECTION
14
PROPERTIES OF MATERIALS
15
STRENGTH
15
STIFFNESS AND ELASTICITY
18
THRUST BEARINGS
21
PROTECTING THRUST BEARINGS FROM SNOW AND ICE
21
ANCHORS
22
SOIL MECHANICS PRIMER
22
ANCHOR TYPES
23
SCREW ANCHORS AND STRENGTHS
23
INSTALLATION OF SCREW ANCHORS
24
GUY CABLES
24
GUY CABLES ACT LIKE SPRINGS
24
HOW GUY CABLES STABILIZE YOUR TOWER
24
ORIGIN OF THE 10% PRELOAD RULE
25
EFFECT OF GUY SIZE
25
TYPES
25
USING PREFORMED GUY GRIPS AND THIMBLES
28
TENSIONING
31
GUY TENSION MEASUREMENT
33
USING LOOS BRAND TENSION METERS FOR GUYS
33
CHECKING GUY TENSION BY COUNTING OSCILLATIONS
35
THERMAL EFFECTS ON GUY TENSION
36
MEASURING TOWER PLUMB
37
TEMPORARY GUYING
37
TEMPORARY GUYS FROM EHS
38
TEMPORARY GUYS USING ROPES
38
LIGHTNING ABATEMENT
39
LIGHTNING PROTECTION THEORY
39
HOMEBREW STATIC DISSIPATORS
40
GROUNDING FOR LIGHTNING PROTECTION
41
EXAMPLE TOWER GROUNDING METHOD FOR LIGHTNING PROTECTION
43
GROUNDING GUY CABLES
45
GROUNDING FEEDLINES
46
COMMERCIAL FEEDLINE GROUNDING CLAMPS
47
HOMEBREW FEEDLINE GROUNDING CLAMPS
47
ASSISTING FEEDLINE AND CABLE GROUNDING WITH CHOKE COILS
48
HOMEBREW GROUNDED ENTRANCE PANEL
48
GROUND ROD METAL SELECTION
51
SINKING GROUND RODS
52
IMPROVING GROUND ROD EFFECTIVENESS
52
CLIMBING GEAR
53
CLIMBING BELT
53
SOME THOUGHTS ABOUT FALL ARREST
54
CLIMBING LANYARDS
55
CARABINERS
56
CLIMBING SAFELY WITH HARNESS AND LANYARDS
56
CARRYING TOOLS
58
HOMEBREW TOOL AND PART POUCHES
58
ROPES & KNOTS
58
MAKING YOUR OWN LANYARDS
59
COWTAILS LANYARD
59
POSITIONING LANYARD
60
CORROSION PREVENTION
60
DISSIMILAR METALS AND GALVANIC ACTION
60
CATHODIC PROTECTION
67
PROTECTING ANTENNAS FROM CORROSION
67
PROTECTING THREADED FASTENERS
68
THREAD LOCKING
70
WATERPROOFING CONNECTIONS
71
ACCESSORY MATERIALS AND SERVICES
73
INSULATING MATERIAL
73
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