tower safety and rescue

7/28/2019 Tower Safety and Rescue

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Tower Safety and RescIn Memory of Leo Deters

Thomas Boughton Silliman, P.E.PresidentElectronics Research, Inc.


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Objectives of this PresentaDiscussion of applicable standards

Job safety

Proper equipment

Climber rescue

Rescue equipment and procedureSummary


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There are standards for tower s

Current Standards

Proposed Standards


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Applicable Current Stand TIA/EIA-222-G: Structural Standard For AntennaSupporting Structures and Antennas

OSHAASCE Standard: Design Loads on Structures Du

Construction TIA Standard: Structural Standards for Steel GinUsed for Installation of Antenna Towers and Ant

Supporting Structures FCC Standards on Human Exposure: OST


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G StandardAttachment point rated at 500

Safety climb device or attach

points every four feet


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OSHA100 % fall protection for any climber over siabove the groundRiding the load line10 : 1 Safety factor on all rigging

No more than two men at a time on the loaNo non metallic load lines

Winch must be man rated


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OSHAOSHA rf exposureOSHA requires the site owner to notifyworkers working on the site of any potsources of rf exposure

Site owner should have a tower accesin place with a recommended climbing

access plan for all areas of the structu


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Recommended Sign For To


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Gin Pole Standard Make sure that your contractors pole has been certifie Pole should have a load chartAny special pick needs to be reviewed and certified by Pole deflection limits should be specified and verif ied

pick

No picks should be made if wind speed is greater thanunless special engineered lift provisions are considere

Gin pole and rigging should be load tested


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Section .0600 Communication

Tower Standards


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FCC StandardsTower access plan with rf safety plan shbe available to insure that the tower creworking on any tower is not exposed toradiation levels in excess of the FCC lim

Note: OSHA also has radiation standathe OSHA radiation standard is one te

the FCC standard and will not govern.


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Typical Measuring Equipment

For Verification of RF Exposure


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Proposed StandardANSI/TIA Standard: StructuralStandards for Installation, Altera

and Maintenance of CommunicaTowers, Antennas, and Antenna

Supporting Structures


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Summary of Proposed

Construction Standard

New Construction Standard w

replace existing Gin PoleStandard


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Proposed Construction Wind Sp

Wind speeds for design during

constructionSEI/ASCE 37-02: Design loads on

structures during constructionSection 6.2.1 Design Velocity: UseMph 3 second peak gust wind for wind speed.


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Wind Speed vs Construction Pe

Requirements in ASCE 37-0

Less than six months:

.75 X 90 = 67.5 Mph6 weeks to one year:.80 X 90 = 72 Mph


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Wind Speed vs Construction Overall Time Requ

Proposed in new Tower Construction Stand

During day and up to 24 hour

24 hours up to 1 week

1 week to six monthsConstruction > 6 months

0.6 X 90 = 54 MPH

0.67 X 90 = 60 MPH

0.8 X 90 = 72 MPH 1.0 X 90 = 90 MPH

Additional Construction


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Additional Construction

ConsiderationsEffects of guy wire slippage and the need fo

temporary guy wiresMaximum deflection of a tower during the pload

Deflection of gin pole during engineered splifts

Load testing of gin pole, tower, and rigging performing a lift sequence


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Tower Safety Starts With Safe Cli

Tower Climbing Certification is

availableTower Owners Should Consider

Requiring Climber CertificationAnd Contractors Insurance

Verification


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Job Safety Job safety starts with a safety plan Emergency phone numbers Site location with directions Location of local hospitals RF safety plan Communications on site (cell phone) Climbing rescue plan and equipment List of trained personal on site trained in rescue File with all equipment certification

Safety Equipment


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Safety Equipment

For The Tower ClimberProper climbing harness

Approved attachments to towe

Approved fall protectionProper head gear

Proper foot gear


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Proper Climbing EquipmAny climber

climbing on yourtower should be

certified andshould have a full

body harness


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Safety Belt RequiremeBelt must hold unconscious climber right sor inverted

Shoulder strapsLeg straps

Per ANSI Z359.1-1992 (3.3.1) Torso angle sexceed 30 degrees

Dorsal D ring for fall protectionThis ring is on the back of the harness

A OSHA d li bi h


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An OSHA approved climbing harness m

have a Dorsal D Ring

For fall protection a shock lany


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For fall protection, a shock lany

must be attached to the dorsal D


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Energy Absorbers Deploy ANSI 450/900


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Energy Absorbers Deploy ANSI 450/900OSHA 1800 lbs maxBody Breaks at 2700 lbs

Equipment Tested for People 130-310 lbs6 ft tallMax 6 Fall (Dont Out Climb Equipment)

Calculated Clearances 6 EA Lanyard 17.5

Self Retracting Line 7.5Vertical Life Line 17.5 + Rope StretchLadder Climb Device 3.5

(Your work positioning hook is not considered fall protection equipment.)

Protect the Gate 220/350 lbs and it will fail

Always have a Rescue Plan. 1. Emergency Phone Numbers2. Your Location and Directions3. Communications (Radio, Cell Phone, etc..)4. Checklist of rescue equipment

5. Identification of Competent Rescuer6. Written rescue procedures

BEFORE A RESCUE ATTEMPT ALWAYS CALL 911 (just incase you both need to be r

During Rescue if victim is unconscious it is VERY important to get them to the nearest hosurface (ground or tower) due to Harness Hang Syndrome.

Harness Check(take everything out of your pockets)


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Graphic Exampl

If a pelican hook is used it must


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If a pelican hook is used, it must

locking gate to avoid roll ou

Hard Hat must meet


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Hard Hat must meet

standards

Dont let people climb


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Dont let people climb

your tower in tennis sho

Rope Fall Arrester makes a g


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Rope Fall Arrester makes a g

attachment for fall protecti

Where no climbing access is available


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Where no climbing access is available,

can be used with separate rope fall prot


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Auto Belay (ID)


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Tower Climber RescThe life expectancy for a person in aclimbing harness hanging from the bring is


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HIERARCHY OF RESC1. Rescue Prevention2. Self Rescue

3. Assisted Rescue4. Suspended Rescue


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ASSISTED RESCUEInvolves someone else tolower person to groundlevel

The Assisting Rescuer

needs to ensure they arenot exposing themselvesto unprotected risks of

falls

R ith Ad t


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Rescue ropes with Advant

The first step in climber res


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The first step in climber res

requires a mechanical advan

Rescue requires to life a climber suspenfor his climbing belt using mechanicaladvantage

Mechanical advantage can be a simple 5rope system using locking pulley, mech

hoist, or hand hoistCome along or winch can also be used

Mechanical Advantag


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Mechanical Advantag

Locking pulley


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Locking pulley

Rescue Equipmen


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Rescue Equipmen


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Summary Be aware that standards exist If gin pole is used on your tower, make sure that

certifiedGin pole pick chart on site

Pole deflections monitoredSpecial picks engineered Require safety plan for tower crew

Plan for emergencyProper equipment


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Questions?Thank you for giving ERI theopportunity to share our tow

safety and rescue plans andprocedures with all of you to


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tower safety and rescue

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