Incorrect Load Weight Estimation Leading to Rigging or Crane Overload
HighDogmen must estimate load weights when documentation is unavailable or when handling materials where weight is not marked. Underestimating load weight results in selection of inadequate rigging capacity or operation of cranes beyond their rated capacity for the boom configuration and radius. Bundled materials, concrete elements with hidden reinforcement, equipment containing liquids or internal components, and loads partially buried or frozen to ground can weigh substantially more than visual appearance suggests. Overload conditions stress rigging beyond design capacity causing sling or chain failure, and can exceed crane structural or stability limits causing boom failure or crane tip-over.
Consequence: Catastrophic rigging failure causing load drop and crushing injuries or death to ground personnel. Crane structural failure or tip-over from operation beyond capacity limits. Serious injuries to multiple workers from falling loads. Major equipment damage and project delays. Regulatory prosecution for operating beyond safe working loads. Civil liability for injuries and damages.
Rigging Equipment Failure from Damage or Defects
HighLifting slings, chains, shackles, hooks, and associated rigging hardware subjected to repeated loading, abrasion, chemical exposure, and impact can develop damage compromising strength. Wire rope slings suffer broken wires, crushing, kinking, or core wire protrusion. Textile slings develop cuts, abrasion, chemical degradation, or ultraviolet damage. Chains experience stretched links, cracks, or wear at bearing surfaces. Shackles suffer bent pins, thread damage, or body distortion. Using damaged rigging equipment that appears serviceable but has lost structural capacity causes unexpected failure during loading. Dogmen may not detect internal damage or may continue using equipment beyond retirement criteria due to production pressure or limited rigging inventory.
Consequence: Sudden rigging failure during lifting causing load drop and crushing death or serious injury to personnel beneath or near loads. Partial failure causing uncontrolled load swing striking ground personnel, structures, or crane booms. Whiplash effects from failed slings striking workers. Equipment damage from dropped loads. Work stoppages for incident investigation. Potential criminal prosecution if negligence established.
Being Struck by Suspended Loads or Crane Boom During Operations
HighDogmen work in close proximity to crane booms, counterweights, and suspended loads throughout lifting operations. While directing crane movements, dogmen may position themselves in slew paths of booms or travel paths of loads without maintaining adequate clearances. Load swing from wind, rapid crane movements, or pendulum effects can cause suspended loads to travel beyond expected positions striking ground personnel. Crane boom movements during slewing or extending operations present strike hazards particularly to dogmen focused on load positioning rather than boom position. Communication breakdowns can result in crane operators commencing movements while dogmen remain in hazardous positions.
Consequence: Severe blunt force trauma including head injuries, crush injuries, or death from being struck by multi-tonne suspended loads or crane boom sections. Fractures, internal injuries, and soft tissue trauma requiring hospitalisation. Pinning or crushing between loads and fixed structures. Secondary injuries from being pushed into other hazards. Permanent disability from serious head or spinal injuries. Death of experienced dogman removing safety oversight from subsequent operations.
Manual Handling Injuries from Positioning Heavy Rigging Equipment
MediumDogmen manually lift, carry, and position rigging equipment including wire rope slings (10-30kg), chain sets (15-40kg), spreader bars (20-100kg), and shackles throughout work shifts. Rigging must be retrieved from storage, carried to load locations, positioned under or around loads in awkward postures, and attached to crane hooks at overhead reach. The repetitive nature of multiple lifts throughout a workday creates cumulative musculoskeletal loading. Working in confined spaces, on uneven ground, or from awkward positions while rigging loads compounds manual handling strain. Handling equipment in cold conditions reduces grip strength, while working in heat accelerates fatigue.
Consequence: Acute lower back strain or disc injury from lifting heavy rigging from ground level or awkward positions. Shoulder injuries from repetitive overhead reaching when attaching rigging to crane hooks. Chronic musculoskeletal disorders developing from cumulative exposure over months or years. Soft tissue injuries from manual handling while fatigued. Reduced work capacity and need for modified duties or time off work. Long-term disability from severe back injuries affecting career progression.
Hand and Finger Crush Injuries from Pinch Points in Rigging
MediumNumerous pinch points exist during rigging operations where hands or fingers can be crushed between rigging components, loads, and fixed structures. Attaching shackles requires manual handling of pins while shackle bodies are tensioned. Threading wire ropes through load attachment points risks fingers being caught as loads settle. Handling chains creates pinch points between links. As loads take weight, all rigging tightens creating crush hazards for hands in close proximity. Dogmen working quickly under time pressure may not fully withdraw hands before signalling operators to tension rigging. Wearing gloves that are too bulky or loose can catch in pinch points drawing hands into crush zones.
Consequence: Severe crush injuries to fingers or hands including fractures, tissue damage, or traumatic amputation of digits. Prolonged incapacity from hand injuries affecting ability to continue dogging work. Permanent loss of hand function or dexterity affecting career options. Infection risks from contaminated crush injuries. Psychological trauma from severe hand injuries. Loss of income during recovery periods.
Falls from Elevated Positions When Rigging Loads at Height
MediumDogmen sometimes must access elevated positions to attach rigging to loads positioned on stacked materials, elevated platforms, or partially erected structures. Working from ladders, scaffolding, or elevated work platforms while handling heavy rigging equipment creates fall hazards. Reaching over edges or guard rails to attach slings reduces stability. The physical effort of lifting rigging equipment while on elevated platforms increases overbalancing risk. Rigging loads in wind conditions while elevated compounds stability challenges. Some dogmen may climb onto unstable stacked materials or loads themselves to access rigging points, creating serious fall risks.
Consequence: Serious injuries from falls including fractures to arms, legs, or pelvis from impact. Head or spinal injuries if falling onto hard surfaces or projections. Death from falls exceeding 3-4 metres particularly if striking objects during fall. Lacerations or soft tissue trauma from contact with materials or edges during falling. Long recovery periods affecting employment. Permanent disability from serious fall injuries.
Communication Breakdown Between Dogman and Crane Operator
HighEffective communication between dogman and crane operator is essential for safe lifting operations. Hand signals can be misunderstood particularly at distance or in bright backlighting. Radio communications suffer interference, battery failures, or unclear transmission in noisy environments. Operators and dogmen may have different understandings of signal meanings if trained to different standards. Language barriers between multicultural crews create communication difficulties. Multiple dogmen providing conflicting signals to single operators cause confusion. Communication failures result in unintended crane movements, premature load releases, or continued operations when ground conditions are unsafe.
Consequence: Loads released prematurely causing drops onto personnel or property. Crane movements occurring while dogman is in hazardous positions causing strike injuries. Loads positioned incorrectly causing instability and collapse. Boom movements toward powerlines or obstacles when operator misunderstands hazard warnings. Multiple personnel endangered by confused or contradictory communications. Incidents requiring emergency response and investigation. Lost confidence between crane operators and ground crew affecting future operations.