OSHA Focus Four Hazards
What is a positioning device system?
Harness rigged to allow worker to be supported on vertical surface with both hands free
Vertical lifelines limit free fall to how far?
2 feet or less
What do you need around dangerous equipment?
Guardrails
What's the maximum arresting force of a PFAS?
1,800 lbs
What systems should be provided at a leading edge of 6 feet or more?
1. Guard rail system 2. Safety net system 3. Fall arrest system
What do workers need when they are exposed to falling objects?
1. Hardhat 2. Barrier preventing objects from falling 3. Canopy structure 4. Barricade falling area from workers
Steps to create a safe job site from falls?
1. Inspect the job site and work surfaces for hazards 2. Determine that the work surfaces are strong 3. You find that work must be done near a 6 foot edge 4. Have guard rail systems constructed and inspected 5. Select and inspect the personal fall arrest system and make sure workers know how to use them 6. Begin work and ensure workers follow safe procedures
Whats the minimum diameter of a pipe top and mid rail?
1.5 inches
What's the minimum diameter of a top and mid rail?
1/4 inch
How far do you stay away from overhead electrical lines during clean up
10 feet
The Safety Net system must extend how far when it's installed 5-10 feet below the surface?
10 feet
Where are control lines erected in a Controlled Access Zone?
10-15 feet from edge
The Safety Net system must extend how far when it's installed more than 10 feet below the surface?
13 feet
In free fall, how far can a body travel in 3 seconds?
144 feet
In free fall, how far can a body travel in 1 second?
16 feet
Warning Line stanchions must withstand what force?
16 lbs at 30 inches
Guard rail systems must be able to withstand the force of how any pounds at any point?
200
What is the minimum breaking force of a Controlled Access Zone?
200 lbs
What is the diameter of a safety net drop test sand bag?
28-32 inches
What's the minimum diameter of a structural steel top and mid rail?
2x2x3/8 inch
Self-retracting lifelines have tensile load of how much weight?
3,000 lbs
Lifeline D rings have tensile load of how much weight?
3,600 lbs
What's the maximum deceleration distance of a PFAS?
3.5 feet
In free fall, how far can a body travel in 0.5 seconds?
4 feet
How many pounds are safety net drop test sand bags?
400 lbs
What's the minimum drop distance for safety net drop test sand bags?
42 inches
What height is the top rail of a guard rail?
42 inches plus or minus 3 inches
How many pounds of force should the anchor point of a PFAS withstand?
5,000 lbs
Lifeline D rings have tensile strength of how much weight?
5,000 lbs
Vertical Lifelines have breaking strength of how much weight?
5,000 lbs
Toe boards must withstand what weight?
50 lbs
Warning Line stanchions must have a minimum tensile strength of what?
500 lbs
What's the minimum breaking weight of safety net?
5000 lbs
What's the maximum distance you can fall with a PFAS?
6 feet
Where are flags located in a Controlled Access Zone?
6 foot intervals
When more than one safety net is connected, the connection can't be more than how far apart?
6 inches
In free fall, how far can a body travel in 2 seconds?
64 feet
The Safety Net system must extend how far when it's installed 5 feet below the surface?
8 feet
What is a Safety Monitoring System?
A competent person responsible for recognizing and warning employees of fall hazards
What is a Fall Protection Plan?
A plan when normal fall protection systems are not feasible or would be more dangerous
What is a Controlled Access Zone (CAZ)?
An area below a brick laying or related work where only qualified people can be
What is a Warning Line System?
Barrier erected on a roof to warn workers that they are approaching an unprotected edge
Where is a Controlled Access Zone located?
Between 6-25 feet away from unprotected edge
What are the three parts of a PFAS?
Body harness, shock absorbing lanyard, secure anchors
What has to be added to wire rope guard rails?
Flags
Whats the first step for fall prevention?
Employer determining that the walks surfaces have the strength to support workers
How often should a warning line be flagged?
Every 6 feet
How often do you need to test safety nets?
Every 6 months, after repair, after moving, after installation
What is the leading cause of fatalities in construction?
Falls
What is an ARC flash also called?
Incident Energy
How do you know an electrical cord is safe for construction?
Marked National Electric Code Article 400.6 every 24 inches. Also marked with an "S"
What's the maximum mesh opening of safety net?
Must not exceed 36 inches or be longer than 6 inches on any side
How low can a Warning Line be placed?
No less than 34 inches from work surface
How far can Safety Net systems be installed below the surface?
No more than 30 feet
How high can a Warning Line be placed?
No more than 39 inches from work surface
Whats the minimum opening in guard rail systems?
Not more than 19 inches
What's the minimum distance between intermediate members used between posts?
Not more than 19 inches apart
How often do you install flags on top rail?
Not more than 6 feet
What's the minimum distance between a post made of structural steel?
Not more than 8 feet
Whats the minimum distance between a post made of pipe?
Not more than 8 feet
What is a PFAS?
Personal Fall Arrest System
What is required for hoisting areas if guard rail has to be removed to hoist?
Personal fall arrest system
What are the three parts of a guard rail?
Top rail, mid rail and posts and when necessary toe board
All covers must withstand what weight?
Twice the expected weight
When do you need fall protection?
When the exposure is 6 feet or more
When do you need mid rails in a guard rail?
When there is no wall of at least 21 inches
When do you protect window openings?
When they are at least 6 feet high and the bottom edge is less than 39 inches above walking height
What can guard rails be made of?
Wood, pipe, steel or wire rope
Whats required over covered walkways of at least 6 feet deep?
guardrails
Where are mid rails installed?
midway between top rail and walking level
How much weight does a positioning device system need to carry?
twice the impact load or 3,000 lbs whichever is greater