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Tower Construction, Tower Standards
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Historical Development of Standards
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The New Standard will incorporate t
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What is a Gin Pole• It is a devic
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Development of Gin Pole Standard•
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This was followed by full scale tes
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TR 14.7Gin Pole Sub-Committee Conce
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Advantages for the Broadcaster• A
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• 1.0 General• 2.0 Construction
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Definitions• Competent Rigger: a
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Qualified Person• Have met all th
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Rigging Plan Requirements• A rigg
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Rigging Plan ClassificationsClassDe
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Climbing Facilities• Maintain the
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Types of Hoist AnchorageLoad LineHo
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Supporting Structural Loading Durin
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Guy Wire Installation• Guy wires
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Guy Anchor Temporary Support• Sli
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Slippage Connections• When fricti
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Temporary Backup System• The back
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• Block forces transmitted to the
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Lifting Existing Loads from Structu
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Gin Pole Operation and Use• Scope
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Monitoring a Lift• Load Testing
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Tip DeflectionHelps VerifyLiftedLoa
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Changing Degrees to InchesHface
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Special Engineering Lift1. It is th
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“Special Engineered Lifts” can
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Shot Thru Transit
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Load off the Ground with Minimum Ta
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Regular Tag Situation
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Bridle Slings• Controls the stabi
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Straight and Trolley Tag Systems
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Controlling the Load Line
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• Conditions in which thestructur
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Operational and Non-Operational Win
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Tilted Gin Pole Use to be Covered
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Repairs and Modifications• Repair
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Leg Inspection Criteria• Toleranc
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Re-Use of Gin Pole Fasteners
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Bridle and Basket Forces• The gin
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Gin Pole Design Method• ASD - AIS
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Gin Pole Free Body Diagramsfor Engi
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Impact Factors for Gin Poles(Im)•
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Load Line in Center of Pole• Rest
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Rooster Head
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Track Loading and Design
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Support Conditions Affect Gin PoleC
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250’ Tower-Strength RequirementsC
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Guy Anchor Rod CorrosionFoundation
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Tower Failure due toAnchor Rod Corr
- Page 103 and 104: Under ground and thus undetected gu
- Page 105 and 106: Why does Steel Corrode?• If this
- Page 107 and 108: Basic Corrosion CellInternal or Ext
- Page 109 and 110: Causes of Electrical Current• Dif
- Page 111 and 112: External Corrosion caused byDissimi
- Page 113 and 114: Internal Corrosion caused byDissimi
- Page 115 and 116: Internal Corrosion caused by dissim
- Page 117 and 118: Why doesn’t hot dip galvanizing p
- Page 119 and 120: How to Evaluate Corrosion Risk Prob
- Page 121 and 122: Three ways to report Soil Particle
- Page 123 and 124: Aggressive Soil TypesFrom Geo-Tech
- Page 125 and 126: Moisture ContentFrom Geo-Tech Repor
- Page 127 and 128: Hydrogen Ion Activity (pH)From Geo-
- Page 129 and 130: Soils with SulfurFrom Geo-Tech Repo
- Page 131 and 132: Visual and Agriculture DataWater Le
- Page 133 and 134: Visual InspectionEvaluate Site Soil
- Page 135 and 136: Another easy way to view soil class
- Page 137 and 138: Visual InspectionBacteria sources,
- Page 139 and 140: Visual InspectionLook for evidence
- Page 141 and 142: National Pipeline Mapping System (N
- Page 143 and 144: Soil Properties, On Site TestingMeg
- Page 145 and 146: Predicting Active Corrosion Cell by
- Page 147 and 148: Predicting Active Corrosion Cell by
- Page 149 and 150: • Hand digging around anchorshaft
- Page 151 and 152: Limited ExcavationGround LevelMud
- Page 153: Total Excavation• Expensive• Ca
- Page 157 and 158: Ultrasound: Limited Surface Area, s
- Page 159 and 160: Field Application of Longitudinal W
- Page 161 and 162: Ultrasound: Shear Wave,also called
- Page 163 and 164: Ultrasound: Shear WaveLoud Entry No
- Page 165 and 166: Making Longitudinal Wave Work
- Page 167 and 168: Limiting Factors in using Ultra Sou
- Page 169 and 170: 20’ x 2-1/2” dia Rod, 25% x-sec
- Page 171 and 172: Ultra Sound Field Results
- Page 173 and 174: Concrete Encasement• Associated P
- Page 175 and 176: Associated Problems• Difficult to
- Page 177 and 178: Sacrificial AnodesAssociated Proble
- Page 179 and 180: A Better Sacrificial AnodeMAG-Rod b
- Page 181 and 182: Summary• Corrosion begins when th
- Page 183 and 184: SummaryUltra Sound is the most prom
- Page 185: Construction Standards&Guy Anchor R