© 2015, glabe consulting services, inc. - colorado · you need to know • the nature of any...
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SCAFFOLDING
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SCAFFOLDING
How do YOU know it’s safe??
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YOU NEED TO KNOW
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YOU NEED TO KNOW
• The nature of any electrical hazards, fall hazards and falling object hazards;
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YOU NEED TO KNOW
• The nature of any electrical hazards, fall hazards and falling object hazards;
• The correct procedures for dealing with those hazards;
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YOU NEED TO KNOW
• The nature of any electrical hazards, fall hazards and falling object hazards;
• The correct procedures for dealing with those hazards;
• How to remove and install the fall protection system;
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YOU NEED TO KNOW
• The nature of any electrical hazards, fall hazards and falling object hazards;
• The correct procedures for dealing with those hazards;
• How to remove and install the fall protection system;
• The proper use of the scaffold and the proper handling of materials on the scaffold;
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YOU NEED TO KNOW
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YOU NEED TO KNOW
• The maximum intended load and the load-carrying capacities of the scaffolds used;
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YOU NEED TO KNOW
• The maximum intended load and the load-carrying capacities of the scaffolds used;
• All pertinent requirements of the OSHA scaffolding standards.
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YOU NEED TO KNOW
• The maximum intended load and the load-carrying capacities of the scaffolds used;
• All pertinent requirements of the OSHA scaffolding standards.
Finally,
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YOU NEED TO KNOW
• The maximum intended load and the load-carrying capacities of the scaffolds used;
• All pertinent requirements of the OSHA scaffolding standards.
Finally, OSHA expects you to be retrained if you
forget any of this stuff. © 2015, Glabe Consulting Services, Inc.
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The 5 Hazards are……
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What exactly is a scaffold?
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A Scaffold is any – Temporary Elevated Platform
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A Scaffold is any – Temporary Elevated Platform
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A Scaffold is any – Temporary Elevated Platform
And it’s supporting Structure -
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A Scaffold is any – Temporary Elevated Platform
And it’s supporting Structure used for
Supporting employees or materials or both
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Is this a scaffold?
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Is this a scaffold?
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Is this a scaffold?
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Is this a scaffold?
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What’s wrong here?
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A Scaffold is any – Temporary Elevated Platform
And it’s supporting Structure used for
Supporting employees or materials or both
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The Five Most Serious
Scaffold Hazards 1. Falls
2. Unsafe Access
3. Struck by falling objects
4. Electrocution
5. Scaffold Collapse
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What Should I Know Before I Use a Scaffold
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Here’s what you need to know to use a scaffold!
• Adequate Foundation • Proper Access • Fall Protection • Falling Object Protection • Scaffold Structural Integrity • Allowable Load • Decent Platform • Electrocution
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Scaffold Foundations
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Scaffold Foundations
All scaffolds must have an adequate foundation
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What makes a good foundation?
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Is this an adequate foundation?
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Scaffold Access
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What is safe access?
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ACCESS
• MAXIMUM FIRST STEP = 24”
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Scaffold Access
Note: All Portable Ladders must comply with OSHA Subpart X – Stairways and Ladders
Extension Ladder
Ladder extends 36” above platform
Ladder Strength Type 1A – 300 Pounds Type 1 – 250 Pounds Type 11 – 225 Pounds Type 111 – 200 Pounds
¼ of L
Caution! Make sure the ladder
doesn’t knock the scaffold over!
• Portable Ladders – Extension Ladders
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Scaffold Access • Attachable Ladders (Clamp-on Ladders)
Maximum first step = 24”
11 ½ minimum Rung length
Rungs uniformly spaced 16 ¾” maximum
Rest Platform at least every 35 feet
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Scaffold Access • Integral Prefabricated Scaffold Access
END FRAME (Mason’s Frame)
11-1/2” min
Uniform
16 ¾” maximum
16 ¾” max
Ladder steps & rungs shall line up vertically between rest platforms
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Scaffold Access
14” max Horizontally
24” max Vertically
• Direct Access Floor, Catwalk or other Surface
Scaffold Platform
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Scaffold Platforms
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PLATFORM ?? One plank
wide is
NOT
enough for anyone.
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Scaffold Platform Construction
Distance from front edge of platform and the face of work = 14”
Platform shall be fully planked or decked between the front uprights and the guardrail supports
Maximum Space between Platform units = 1” Exception: Space can be greater to fit around uprights.
1”
1”
Minimum Platform Width = 18”
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2 x 10 Plank Scaffold Platform Construction
12”
DO NOT DO THIS! This is not Overlap
Span of Plank
Overhang Min = 6” Max = 12’/18”
Minimum Overlap = 12” Plank Support (Bearer)
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Safe Platform?
What’s the max gap?
Overhang?
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Where’s the
platform?
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Is this a good
platform?
How’s the access??
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Electrocution
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How close can the scaffold be to the electrical wires?
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ELECTROCUTION
• 3 FEET FOR 300 VOLTS (Insulated) • 10 FEET (Uninsulated) • 10 FT UP TO 50,000 VOLTS (Insulated) • 0.4” (13/32”) FOR EVERY ADDITIONAL
1,000 VOLTS • HOW DO YOU MEASURE THAT??? • THE LOUDER IT HUMS-THE FARTHER
AWAY YOU SHOULD BE!!! © 2015, Glabe Consulting Services, Inc.
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Scaffold Guardrail Systems
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Guardrails
10’-0”
39’ – 45”
Toprail: 200 # Midrail: 150 #
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Would You use this?
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Scaffold Falling Object Protection
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Scaffold Falling Object Protection
Do what you have to so objects don’t fall off and hit an
employee below
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The human falling object!
He better hope his co-workers
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Would you use this?
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Rolling Towers
(Mobile Scaffolds)
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Height to Base Ratio
The maximum height to base ratio is 4
For a scaffold 5’ wide, the max height is 20 feet
5 feet x 4 = 20 feet
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Rolling Towers— Potential Deathtraps!!
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Rolling Towers— Potential Deathtraps!!
PIN THE CASTERS!!!
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Rolling Towers— Potential Deathtraps!!
PIN THE CASTERS!!!
LOCK THE CASTERS!!!
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Make sure your
insurance premiums are paid!
If you ride a Rolling Scaffold?
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Load Capacities
You should know this so you don’t overload the scaffold
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Allowable Loads • Frame Scaffolds: 2,000 pounds per leg
• 8” Scaffold Casters: 500 pounds • 4” Scaffold Casters: 250 pounds
• Scaffold Grade Plank: – 10’ Span: 250 pounds – 7’ Span: 500 pounds – 5’ Span: 750 pounds
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What are the 5 Hazards?
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Look familiar?
Platform
Guardrails
Access
Stability
Foundation
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Let’s get it right:
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Let’s get it right: • Guardrails are needed at what height?
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Let’s get it right: • Guardrails are needed at what height? 10 feet
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Let’s get it right: • Guardrails are needed at what height? 10 feet • How much must the top rail hold?
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Let’s get it right: • Guardrails are needed at what height? 10 feet • How much must the top rail hold? 200 pounds
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Let’s get it right: • Guardrails are needed at what height? 10 feet • How much must the top rail hold? 200 pounds • What is the height range of a top rail?
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Let’s get it right: • Guardrails are needed at what height? 10 feet • How much must the top rail hold? 200 pounds • What is the height range of a top rail? 39” – 45”
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Let’s get it right: • Guardrails are needed at what height? 10 feet • How much must the top rail hold? 200 pounds • What is the height range of a top rail? 39” – 45” • Can you use personal fall protection
instead of a guardrail system?
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Let’s get it right: • Guardrails are needed at what height? 10 feet • How much must the top rail hold? 200 pounds • What is the height range of a top rail? 39” – 45” • Can you use personal fall protection
instead of a guardrail system? Yes
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Let’s get it right:
• How much load can a frame scaffold hold?
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Let’s get it right:
• How much load can a frame scaffold hold? 2,000 pounds per leg
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Let’s get it right:
• How much load can a frame scaffold hold? 2,000 pounds per leg • When is access required?
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Let’s get it right:
• How much load can a frame scaffold hold? 2,000 pounds per leg • When is access required? 24 inches height between platforms
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Let’s get it right:
• How much load can a frame scaffold hold? 2,000 pounds per leg • When is access required? 24 inches height between platforms • What is the minimum width of a platform?
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Let’s get it right:
• How much load can a frame scaffold hold? 2,000 pounds per leg • When is access required? 24 inches height between platforms • What is the minimum width of a platform? 18 inches
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Let’s get it right:
• What is the minimum overhang of a plank?
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Let’s get it right:
• What is the minimum overhang of a plank? 6 inches
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Let’s get it right:
• What is the minimum overhang of a plank? 6 inches • What is the maximum overhang?
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Let’s get it right:
• What is the minimum overhang of a plank? 6 inches • What is the maximum overhang? 12 inches or 18 inches
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Let’s get it right:
• How much can a 2x10 scaffold plank hold when it spans 10 feet?
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Let’s get it right:
• How much can a 2x10 scaffold plank hold when it spans 10 feet?
250 pounds
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Let’s get it right:
• How much can a 2x10 scaffold plank hold when it spans 10 feet?
250 pounds • How about 7 feet?
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Let’s get it right:
• How much can a 2x10 scaffold plank hold when it spans 10 feet?
250 pounds • How about 7 feet? 500 pounds
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What were those 5 Hazards? I forgot!
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The 5 Hazards are……
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The 5 Hazards are…… The Five Most Serious
Scaffold Hazards
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The 5 Hazards are…… The Five Most Serious
Scaffold Hazards 1. Falls
2. Unsafe Access
3. Struck by falling objects
4. Electrocution
5. Scaffold Collapse
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94
??
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SCAFFOLDING Now you know when it’s safe!!
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GLABE CONSULTING SERVICES, INC.
Scaffold Safety
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