rev: 8-2011 section 2 fall protection systems. rev: 8-2011 learning objectives: section 2 identify...
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Section 2Fall Protection Systems
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Learning Objectives: Section 2Learning Objectives: Section 2
• Identify when fall protection is required.
• Identify types of “conventional” fall protection systems.
• Determine which protection system to use for a given fall hazard.
• Identify key requirements and basic safety practices for each protection system.
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When Is Fall Protection RequiredWhen Is Fall Protection Required??
OSHA §1926 Subpart M• Where workers on a residential construction site
are exposed to vertical drops of 6 feet6 feet or more, OSHA requires that employers provide fall protection in one of three ways before work begins:
1) Conventional Fall Protection
2) Other Work Methods (Section 5)
3) Alternative Fall Protection (Section 6)
6’
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““Conventional” Fall Protection Conventional” Fall Protection OptionsOptions
We’ll look at each of these.
1) Guardrails 3) Personal Fall Arrest System
(PFAS)
2) Covers
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Guardrail SystemsGuardrail Systems
• Barrier built to OSHA specifications; constructed to prevent workers from falling to lower levels
• Protects against these hazards:– Window and Wall Openings– Unprotected Sides and Edges– Floor Holes
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Guardrail Systems Are Needed For:Guardrail Systems Are Needed For:
• Stairwell Openings• Open-sided Wall Openings• Second and Third Story Non-loading Bearing
Walls When the Studs Are 24” OC• Low (Less Than 39”) Silled Windows• Second and Third Story Deck Floor Holes for
Open Foyers or Cat Walks• Sliding Glass and French Door Openings Onto
Decks and Porches• Skylight Openings Cut Into the Roof
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Requirements for GuardrailsRequirements for Guardrails
• Height Requirements– Toprail
• 42 in. (1.1 m)
– Midrail • 21 in. (50 cm)
– Toe Board• Minimum of 3-1/2 in. (4 in. nominal) (10.2 cm)
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Requirements for Guardrails, Requirements for Guardrails, cont.cont.
• Vertical Supports – Install no more than every 8 ft. (2.4 m)
• Weight Requirement– Must support at least 200 lbs. (90.9 kg) of
force outward and downward along top edge
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Unguarded floor openingsUnguarded floor openings
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Unguarded Stair Opening Unguarded Stair Opening
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Top-rail @ 42”Top-rail @ 42”Top-rail @ 42”Top-rail @ 42”
Mid-rail @ 21”Mid-rail @ 21”Mid-rail @ 21”Mid-rail @ 21”
Toeboard min. 3-1/2”Toeboard min. 3-1/2”Toeboard min. 3-1/2”Toeboard min. 3-1/2”
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Wall openings greater than 18” need to be protected
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Wall openings greater than 18” need to be protected
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24” On Center Studs need guardrails
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Guardrails During Drywall InstallationGuardrails During Drywall Installation
• Prevent the need to remove guardrails during drywall installation: – Build guardrail uprights 6 to 12 in. (15.4 to
30.5 cm) away from where drywall will be placed
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A boot type system, shown here, will allow guardrails to be installed approximately 12 in (30.5 cm) from drywall placement.
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Job Built GuardrailsJob Built Guardrails
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Cut The Post Through The Floor, Cut The Post Through The Floor, nail LVL or Floor Trussnail LVL or Floor Truss
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A Free Standing Guardrail SystemA Free Standing Guardrail System
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Rear Doors Must Be ProtectedRear Doors Must Be Protected
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Install Permanent Guardrail As Soon Install Permanent Guardrail As Soon As Door Is SetAs Door Is Set
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Alternate Solution – Reverse Locks Alternate Solution – Reverse Locks to Inside and Key Lock Doorto Inside and Key Lock Door
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Guardrails For Elevated WorkersGuardrails For Elevated Workers
• When using stilts, increase the height of the top edge of the top rail to an amount equal to the height of the stilts.
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Double Top Rail for Workers on Stilts
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Unprotected Sides/EdgesUnprotected Sides/Edges
• Completed decks
• Lofts
• Stair landings
• Ramps or runways
• Open-sided balconies and platforms
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Greater Than 6’ Fall
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Requirement for Window OpeningsRequirement for Window Openings
• Window openings with a 6 ft. fall hazard (1.8 m) require the installation of a guardrail system, if the bottom sill height is less than 39 in. (1.1 m).
For all window openings, the sill height determines the need for a guardrail.
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Less than 39”
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Working at a second story window--Working at a second story window--What type of protection is needed?What type of protection is needed?
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Properly installed guard rails in low-sill windowsProperly installed guard rails in low-sill windows.
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Requirements for Handrails and Stair railsRequirements for Handrails and Stair rails
• Toprail– 36 in. (.9 m) above the tread vertically in line with the
riser– Install handrail 3” from wall
• Midrail – Halfway between toprail and stair stringer
• Toe Board– Minimum of 3 1/2 in. (4 in. nominal) (10.2 cm)
• Weight Requirement – At least 200 lbs. (90.9 kg)
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Install a toprail 36 in. (.9 m) high to allow one railing to serve as both a handrail and stair rail.
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Protecting Finished Stairs: Guardrails Protecting Finished Stairs: Guardrails Installed Independent From FramingInstalled Independent From Framing
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Build Guardrails Into FramingBuild Guardrails Into Framing
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Build Guardrails Into FramingBuild Guardrails Into Framing
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Hole CoversHole Covers
• Secured and marked cover which protects workers from tripping or stepping into or through a hole and keeps objects from falling through a hole
• Protects against falls through hazards in this category:– Floor Holes
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Hole Covers Are Needed For:Hole Covers Are Needed For:
• Any hole larger than 2” x 2”, such as:– Fireplace openings – Skylights– Basement stair openings– Floor heating, ventilating, and air-conditioning
(HVAC) registers – Plumbing floor cutouts
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Requirements for Hole CoversRequirements for Hole Covers
Hole Covers must be:
• Capable of supporting at least two times the maximum anticipated load
• Secured from movement by nailing in place or other effective method
• Clearly marked indicating the location of the hole
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Cover floor openings larger than 2” by 2” with material to safely support the working load.
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Floor Opening HazardsFloor Opening Hazards
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Unprotected Edges During FramingUnprotected Edges During Framing
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Must be marked with the word "HOLE" or "COVER”
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Bright orange paint is a good way to make sure hazards are seen.
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A Well Guarded Stair OpeningA Well Guarded Stair Opening
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Personal Fall Arrest System Personal Fall Arrest System (PFAS)(PFAS)
• Equipment comprised of an anchorage point, connectors, and a body harness; used to keep a worker from free falling from an elevated surface
• Protects against these hazards:– Unprotected Sides and Edges– Floor Holes– Leading Edges
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Personal Fall Arrest System (PFAS), Personal Fall Arrest System (PFAS), cont.cont.
• Components of a PFAS
• Requirements for Anchor Point
• Using a PFAS
We’ll look at each of these in detail.
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OR
Components of a PFASComponents of a PFAS
• Anchor point• Lifeline• Rope grab• Shock absorbing
lanyard• Full body harness
• Anchor point• Self-retractable lifeline
– In lieu of lifeline, rope grab, and shock-absorbing lanyard
• Full body harness
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Lifeline Anchor Point
Rope Grab
Full Body Harness
Shock Absorbing Lanyard
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Calculating Fall DistanceCalculating Fall Distance
Illustration courtesy of: Miller Fall Protection, Bacou-Dalloz.
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Requirements for Anchor PointRequirements for Anchor Point
• OSHA requires that anchor points must be capable of supporting 5,000 lbs (2,273 kg) or twice the intended load.
The qualified person must determine that a structure is strong enough to support an anchor point for a PFAS.The qualified person must determine that a structure is strong enough to support an anchor point for a PFAS.
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Requirements for Anchor Point, Requirements for Anchor Point, cont.cont.
• Follow the manufacturer’s specifications regarding proper installation
• Check instructions on proper bracing techniques
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Anchor PointsAnchor Points
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Anchor Points, Anchor Points, contcont..
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Sample Engineering DataSample Engineering Data
Source: Miller Fall Protection
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Anchor Points, Anchor Points, cont.cont.
Inside
Outside
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Using a PFASUsing a PFAS
• Read the manufacturer’s information on proper use, installation, inspection, and limitations of the equipment and accessories.
• Inspect the components for damage and excessive wear. – Don’t use a PFAS that is damaged, worn, or has
previously arrested a fall.
These systems should be repaired and recertified by the manufacturer before reuse or reissue.
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Using a PFAS,Using a PFAS, cont.cont.
Proper Wear:
Locate the attachment of the body harness in the center of your back, near the shoulder level, or above your head.
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Using a PFAS, Using a PFAS, cont.cont.
Proper Wear:
If using a retractable lifeline attach it directly to the D-ring on the full-body harness.
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Inspecting a PFASInspecting a PFAS
• Inspect the harness fully before each use. This includes:– Inspecting the buckles– Inspecting the lanyard– Carefully checking the webbing for distortions– Check the hardware (D-rings) connectors for
defects – Inspect rope or lifeline for any rips, tears, or
deformities
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What if a Worker Falls? Need a What if a Worker Falls? Need a Rescue Plan!Rescue Plan!
• A rescue plan describes steps taken to rescue a fallen worker (even if they are wearing a PFAS). Steps include:– Contacting appropriate emergency personnel– Using ladders or other safe work methods to
rescue worker if they are suspended by PFAS– Ensuring the plan can safely rescue a
suspended worker within 3-4 minutes of falling.
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Safety Net Systems 1926.502(c)Safety Net Systems 1926.502(c)
• System consisting of connectors and net installed below a working surface; designed to prevent a worker from contacting a lower level or structure in the event of a fall.
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Safety Net Systems, Safety Net Systems, cont.cont.
Photo courtesy of: Guardian Fall Protection
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Positioning Device System Positioning Device System
• A body belt or body harness system rigged to allow an employee to be supported on an elevated vertical surface and work with both hands free while leaning.
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Positioning Device System, Positioning Device System, contcont..
• Are used to safely position workers away from fall hazards, or in a working position where a fall cannot occur
• NOT designed for fall arrest
• Must be rigged such that a worker cannot free fall more than 2 feet
• Must be secured to an anchor point capable of withstanding 3,000 pounds
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Hands On DemonstrationHands On Demonstration
Activity #2