Lifting Operation

RA-2026-wThQ7C45 Completed

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Risk Assessment Matrix

SN Activity Hazard Consequence Groups Exposed Controls Initial Risk Additional Controls Residual Risk Actions
1
Mobilization and transit of heavy mobile telescopic cranes to construction site
- Overturning on public roads or internal haul roads - Collision with third-party light vehicles and pedestrian traffic - Overhead contact with live overhead utility lines - Structural bridge collapse due to exceeding axle weight limits - Brake fade or mechanical steering failure on inclined approach ramps
- Multiple fatalities or permanent catastrophic disabilities - Severe structural damage to public and site infrastructure - Prolonged vehicular blockage and civil liability claims - Hazardous fluid spillage into public storm drainage
Crane Operator, Escort Vehicle Drivers, Site Logistics Marshals, General Road Users
- Conduct Route Survey Assessment prior to dispatch specifying road load capacities - Secure transportation permits from local transport authorities (e.g., DOT, RTA, ADM) - Provide certified escort vehicle with amber flashing beacon trailing at 30m distance - Strictly observe designated maximum haul road speed limit of 15 km/h on site - Verify driver possesses valid heavy articulated vehicle license and defensive driving certification - Deploy banksman with high-visibility vest at site entry access gates - Confirm clear overhead clearance of at least 1.5m above crane boom travel profile
P 4 × S 5
20
- Implement real-time GPS tracking and driver telematics to monitor speed violations - Restrict crane movement strictly to off-peak road hours (22:00 to 05:00) - Require mandatory pre-dispatch mechanical brake and tire pressure audit checklist - Comply with ISO 45001:2018 – Occupational Health and Safety Management Systems - Comply with ILO Convention C155 – Occupational Safety and Health
P 2 × S 3
6
2
Ground condition assessment, soil compaction testing, and outrigger pad civil verification
- Punching shear failure of crane outrigger foot through soft soil - Setting up over hidden underground voids, drainage culverts, or live utilities - Uneven ground settlement leading to crane out-of-level tilt - Soil wash-out or embankment slope failure caused by rain or dewatering - Insufficient outrigger mat surface contact area
- Catastrophic crane tip-over and structural boom collapse - Crushing injuries and fatalities of surrounding workers - Major utility pipeline rupture and site-wide flooding - Severe asset damage exceeding crane total loss
Lifting Engineer, Geotechnical Surveyor, Crane Operator, Lifting Supervisor
- Obtain geotechnical Plate Load Test / California Bearing Ratio (CBR) report prior to setup - Maintain minimum safety clearance of 1.5 times trench depth from edge of un-shored excavations - Mandate structural engineer sign-off on allowable bearing capacity (minimum 200 kPa) - Use certified steel spreader mats or engineered hardwood timbers sized via outrigger load calculations - Locate all buried utilities using Ground Penetrating Radar (GPR) and obtain excavation clearance permits - Ensure crane level indicator (spirit bubble) confirms 0.0-degree deviation - Inspect ground integrity daily before and after heavy rainfall or high-tide shifts
P 4 × S 5
20
- Install automated settlement monitoring pins around the crane base perimeter - Require Appointed Person (Lifting) to formally inspect and sign the Crane Pad Handover Certificate - Mandate re-verification of compaction following any nearby civil trenching activities - Comply with ISO 45001:2018 – Occupational Health and Safety Management Systems - Comply with ILO Convention C155 – Occupational Safety and Health
P 2 × S 3
6
3
Deployment and fully extended leveling of hydraulic crane outriggers and stabilizers
- Crushing of fingers and hands during mechanical outrigger extension - Structural failure of internal hydraulic stabilizer rams or check-valves - Incomplete extension of outrigger beams contrary to duty chart settings - Slippage of outrigger float from non-level or contaminated spreader plates - Outrigger sinking during hydraulic pressure transfer
- Traumatic amputation of rigger digits - Sudden crane tilting during load pickup - Total structural failure of crane chassis - Fatal crush injury against nearby fixed structures
Rigging Crew, Mobile Crane Operator, Banksman, Mechanics
- Verify 100% full extension of all outrigger beams unless load chart explicitly supports intermediate mode - Ensure mechanical safety locking pins are fully engaged on all outrigger slider beams - Position crane floats squarely in the center of timber/steel outrigger mats - Elevate crane wheels completely off the ground to clear tires of all load bearing - Verify operational integrity of hydraulic pilot-operated check valves prior to set-up - Maintain visual contact between Crane Operator and Rigger during cylinder stroke - Keep hands clear of pinch zones marked with hazard warning stripes
P 4 × S 4
16
- Install proximity warning alarms or interlock sensors confirming outrigger deployment - Conduct daily visual leak audit of all outrigger hydraulic hoses and fittings - Prohibit crane operations if any single outrigger shoe is not fully planar to the mat - Comply with ISO 45001:2018 – Occupational Health and Safety Management Systems - Comply with ILO Convention C155 – Occupational Safety and Health
P 2 × S 2
4
4
Tower crane foundation structural inspection, anchor stool embedment, and torque verification
- Anchor bolt failure due to insufficient concrete cure strength - Anchor stool bolt shearing caused by improper torque tightening - Sub-base structural cracking or shear deflection under cyclic dynamic loading - Moisture ingress leading to corrosion and fatigue failure of fixing studs - Omission of high-tensile locking washers or double-nut locking mechanisms
- Sudden catastrophic tower crane collapse - Multiple workplace and public fatalities - Total destruction of adjacent multi-story buildings - Substantial financial insolvency and legal prosecution
Structural Inspector, Tower Crane Erection Technicians, Site Engineers
- Mandate concrete cube test certification confirming 100% specified design compressive strength (e.g., 40 MPa) - Use calibrated hydraulic torque wrench to tighten anchor bolts to OEM specified values - Perform Non-Destructive Testing (NDT/Ultrasonic) on 100% of embedded anchor stools - Obtain Third-Party Structural Engineer Foundation Sign-off Certificate before assembly - Apply heavy-duty anti-corrosive grease and protective caps over exposed anchor threads - Install earth-pit bonding achieving electrical grounding resistance under 10 Ohms - Re-torque all foundation bolts within 100 operational crane hours post-commissioning
P 3 × S 5
15
- Implement weekly precision surveyor monitoring for tower plumbness (max allowable 1:1000) - Require OEM technician sign-off prior to handing over the anchor base for erection - Fit vibration telemetry sensors on tower stool to detect dynamic cyclic displacement - Comply with ISO 45001:2018 – Occupational Health and Safety Management Systems - Comply with ILO Convention C155 – Occupational Safety and Health
P 1 × S 3
3

Activity Log

System • created
4 weeks ago