ANSI/TIA-1019 DRAFT - Inti

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Summary• Evaluate the corrosion risk by knowing the soilcharacteristics, visual observations, and/or by measuringcurrent flow.• Interrupting the galvanic cell will reduce corrosion possibility.• Reversing the polarity of the galvanic cell will preventcorrosion.
SummaryUltra Sound is the most promising Inspection Method for Inspection andDetection.
Page 1 and 2:
Tower Construction, Tower Standards
Page 3 and 4:
Historical Development of Standards
Page 5 and 6:
The New Standard will incorporate t
Page 7 and 8:
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
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Under ground and thus undetected gu
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Why does Steel Corrode?• If this
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Basic Corrosion CellInternal or Ext
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Causes of Electrical Current• Dif
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External Corrosion caused byDissimi
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Internal Corrosion caused byDissimi
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Internal Corrosion caused by dissim
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Why doesn’t hot dip galvanizing p
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How to Evaluate Corrosion Risk Prob
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Three ways to report Soil Particle
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Aggressive Soil TypesFrom Geo-Tech
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Moisture ContentFrom Geo-Tech Repor
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Hydrogen Ion Activity (pH)From Geo-
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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 and 154: Total Excavation• Expensive• Ca
Page 155 and 156: Ultrasound: Longitudinal Wave
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: Summary• Corrosion begins when th
Page 185: Construction Standards&Guy Anchor R
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ANSI/TIA-1019 DRAFT - Inti

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