Environmental Engineering Reference
In-Depth Information
Types of Barriers
Physical Barriers
Management Barriers
Conduit
Hazard Analyses
Equipment and
Engineering Design
Knowledge/Skills
Line Management Oversight
Fences
Requirements Management
Guard Rails
Supervision
Masonry
Training
Protective Clothing
Work Planning
Safety Devices
Work Procedures
Shields
Warning Devices
FIgure 11.1
Types.of.barriers.to.protect.workers.from.hazards..(
Source:
.Courtesy.of.the.
U.S..Department.of.Energy.)
Industrial. operations. differ. with. respect. to. numbers. of. accidents,. speciic. con-
tributors.to.accidents,.and.the.relative.magnitude.of.the.human-versus-physical.con-
dition.problem..Each.accident,.at.any.given.operation,.is.a.manifestation.of.either.the.
presence.of.a.human.barrier.or.the.absence.of.a.physical.barrier..Any.accident.that.
can.be.prevented.will.be.prevented.by.one.or.a.combination.of.the.following.actions:
•.
Introduce.a.physical.barrier:
•.
On.the.energy.source
•.
Between.the.energy.source.and.the.person
•.
On.the.person
•.
That.separates.energy.from.people.(time.or.space)
•.
Remove.a.human.barrier.that.causes.a.lack.of.or.deiciency.in.a.person:
•.
Information
•.
Tools.or.equipment
•.
Knowledge
•.
Capacity
•.
Incentive
The.PDA.allows.us.to.determine.which.barriers.may.be.provided,.modiied,.or.
removed. to. prevent. accidents.. A. clearer. picture. of. the. distinct. difference. between.
physical. and. human. preventive. measures. is. provided. by. the. following. swimming.
pool.analogy:
