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Friday, December 4, 2020

The Leading Causes of Worker's Death at Site

The following leading causes of worker deaths on construction worksites mostly falls into four types including electrocution, struck-by moving, flying object, and caught-in/between heavy machinery, vehicle or other objects are: 

FALL FROM HEIGHT HAZARDS

IMPROPER SCAFFOLD CONSTRUCTION

  • Erection of scaffold on loose soil that could cause the collapse of the structure
  • Erection of scaffold without base plates that could cause the collapse of the structure
  • Access ladders or platforms without handrails
  • Scaffolding platforms not fully planked.
  • Scaffolding components i.e. standards ledgers transoms are not meeting OSHA standard 
  • Edge protection not being done
  • Missing guardrails above platforms 
  • Gaps in the platform
  • Scaffolding couplers insufficient or not according to the standard or not tied up properly
  • Bracing not being done to support the scaffolding structure
  • Light duty scaffolds to carry out heavy-duty work 
  • Toe boards not being installed to avoid material falling and improper distance of hand and mid-rail form the platform.
  • Untrained worker or incompetent inspector

ROOF/FLOOR OPENINGS

  • Unprotected hole in the floor
  • Barricade not being installed around the opening to indicate fall hazard
  • Unprotected edge of the excavation hole
  • Improper Access and Egress routes 

UNPROTECTED ROOF EDGES

  • Working near an edge with no railing
  • working near an edge without the use of lifeline and safety harness
  • Working without the fall arrest system

UNSAFE PORTABLE LADDERS

  • The base of the ladder not secured properly.
  • 1:4 ration not being followed while placing a ladder (75 Degree)
  • Missing rungs in the ladder
  • Not having a portable ladder extend three-3 feet above the landing
  • Slippery rungs
  • Weak or broken side rungs

STRUCK-BY HAZARDS

STRUCK-BY FLYING OBJECT

  • Drive mechanism i.e. rotation parts of equipment may break and fly off after excessive use 
  • Grinder disc may fly off while using it without the safeguard 
  • A metal piece flies off while cutting activity 
  • Accidental nail gun discharges
  • Concrete splashes during concrete work
  • Tip flying off a saw blade
  • Sandblasting, green cut
  • Cleaning with compressed air flying of sandstones
  • Rock fragments while blasting

STRUCK-BY FALLING OBJECT 

  • Loose materials tools on platforms with no toe boards
  • Scaffolding components especially joints may fall
  • Unsecured woods for shuttering
  • Concrete falling form concrete placing boom
  • Load failure while lifting work
  • Tools/materials fall off unprotected edges
  • Loose material falls from vertical slopes

STRUCK-BY SWINGING OBJECT 

  • Swing radius of crane not barricaded
  • Compressor hoses lose joints that may open
  • Staying close to the nozzle of mobile concrete pump
  • Working around excavators 
  • Standing under the suspended load

STUCK-BY ROLLING OBJECT

  • Gas cylinders placed unsecured
  • Portable equipment i.e. generator mixers placed on slopes
  • Fuel drums not staked properly
  • Large concrete pipes used in drains
  • unsecured stones or sliding of material
  • Unstack materials 

CAUGHT IN/BETWEEN HAZARD

MACHINERY THAT HAS UNGUARDED MOVING PARTS

  • Propeller shafts of concrete mixer
  • Water pump and its drive mechanism i.e. rotating belt, pulleys, motor without mesh guard
  • Conveyor belts of batching plants without any barrier
  • Batching plant mixers 
  • Generator fans without mesh guard
  • Pneumatic tools i.e hand drills
  • Machines not locked out when they are repaired
  • Compressors drive mechanism
  • Working with hand drills
  • Crawler drill chains
  • Dozers chains

BURIED IN OR BY

  • Unprotected trenches 
  • Unprotected excavations
  • Land sliding
  • Unprotected slopes
  • Confined spaces especially tunnels
  • Concrete formwork collapse while fixing reinforcing steel or pouring concrete  

PINNED BETWEEN

  • Mobilization of materials and equipment
  • Manual handling, lifting of material
  • Drilling with a hand drill
  • Working between a stationary object and moving excavator
  • Erection of different formwork plates
  • Handling of large irregular loads

ELECTROCUTION

CONTACT WITH POWER LINES

  • Work at height on scaffolds
  • Lifting works with cranes
  • Excavation work near buried services
  • Demolishing work of buildings
  • Excavation for drains
  • Snowfall may cause breakage of power lines and their contact with personnel walking around 
  • Power lines may fall over during high winds or land sliding
  • Operating equipment around overhead power lines
  • Using a metal extension ladder around overhead power lines

CONTACT WITH ENERGIZED SOURCES 

  • Working without insulated gloves
  • Lockout tag out system not followed during any repair work

IMPROPER USE OF EXTENSION AND FLEXIBLE CORDS

  • Damaged extension that produced sparks


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