Trench Safety
Chief hazard for trenches
What is a cave-in?
Define OSHA
What is the Occupational Safety and Health Administration (or Act)?
Aggregate placed beneath the pipe in a trench
What is bedding?
An Authorized (blank) is the individual who enters the confined space?
Who is the entrant?
Pic #1
Who are the Teenage Mutant Ninja Turtles?
100-140 lb/cf
What is the approximate weight of soil?
Used to control injury hazards from falling off elevated surfaces
What is a fall harness?
Feet of drop per foot of run
What is slope?
Define LFL
What is the lower flammable limit?
Pics #2
Who is Ed Norton?
Required every 25 feet if the trench is over 4 feet deep?
What is a ladder?
Height at which OSHA requires fall protection
What is 4 feet?
Micro-tunneling, jacking and boring, and directional drilling
What are types of trenchless construction?
An authorized (blank) is the person who monitors activities inside and outside the space.
Who is the attendant?
Pic #3
What is orangeburg pipe?
Two types of cave in protection
What are sloping/benching and trench box (supporting the sides)?
First thing to do before wearing fall protection
What is inspect the harness?
Required when a pipe enters 2 feet or more above the outgoing sewer?
What is a drop manhole?
Used to test for hydrogen sulfide or carbon monoxide
What is an atmospheric monitor?
Pic #4
Who is Mr Whipple?
Greatest angle above the horizontal plane at which excavated material will not slide
What is the angle of repose?
Barrier erected to prevent employees from falling to lower levels
What are guardrails?
Soil or aggregate placed from the bedding up to the springline of the pipe
What is haunching?
Three dangers of confined spaces
What is hazardous atmosphere, entrapment, and asphyxiation?
Pic #5
Who is Pennywise?