Construction Risk Assessment: Complete Guide for Site Safety
Construction Risk Assessment: Complete Guide
Construction is one of the most dangerous industries in the UK, accounting for around 30% of all workplace fatalities despite employing only 5% of the workforce. A comprehensive construction risk assessment is essential for protecting workers and meeting legal requirements.
Why Construction Risk Assessments Are Critical
The construction industry has unique challenges:
- Multiple contractors working simultaneously
- Changing site conditions as work progresses
- High-risk activities like working at height and excavations
- Mobile plant and vehicles sharing space with workers
- Temporary structures and unstable ground
Under CDM 2015 (Construction Design and Management Regulations), risk assessments are a fundamental requirement for all construction work.
Key Hazards in Construction
1. Working at Height
Falls from height remain the leading cause of construction fatalities.
Common risks:
- Falls from scaffolding
- Falls from ladders
- Falls through fragile roofs
- Falls from edges without protection
Control measures:
- Use scaffold towers with guardrails
- Install edge protection on roofs
- Provide fall arrest systems
- Use mobile elevated work platforms (MEWPs)
- Never work alone at height
2. Moving Machinery and Site Traffic
Construction sites have excavators, cranes, forklifts, and delivery vehicles operating alongside workers.
Control measures:
- Designated traffic routes with barriers
- Banksman/signaller for reversing operations
- Vehicle exclusion zones around work areas
- High-visibility PPE for all personnel
- Speed limits and signage
3. Excavations
Excavations can collapse without warning, causing fatal injuries.
Control measures:
- Shore or batter excavations over 1.2m deep
- Edge protection around excavations
- Gas monitoring in confined spaces
- Daily inspections by competent person
- Locate underground services before digging
4. Hazardous Substances
Construction involves cement, solvents, paints, and potentially asbestos.
Control measures:
- COSHH assessments for all substances
- PPE including respiratory protection
- Asbestos surveys before demolition
- Wet cutting to suppress silica dust
- Proper storage and handling
5. Electrical Hazards
Overhead lines, underground cables, and temporary supplies all present risks.
Control measures:
- Cable avoidance tools before excavation
- De-energise or insulate overhead lines
- Use 110V reduced voltage equipment
- Regular PAT testing of site equipment
- Safe zones for plant near power lines
How to Create a Construction Risk Assessment
Step 1: Identify All Hazards
Walk the site and identify what could cause harm:
- Physical hazards (falls, trips, struck by)
- Chemical hazards (dust, fumes, substances)
- Biological hazards (contaminated ground)
- Ergonomic hazards (manual handling)
- Psychosocial hazards (workload, lone working)
Step 2: Determine Who Might Be Harmed
Consider all people on site:
- Your own employees
- Subcontractors
- Delivery drivers
- Members of the public
- Young or inexperienced workers
Step 3: Evaluate the Risks
For each hazard, assess:
- How likely is harm to occur?
- How severe would the harm be?
- What controls are already in place?
- What additional controls are needed?
Step 4: Record and Implement
Document your findings and ensure controls are implemented. Your assessment should include:
- The activity being assessed
- The hazards identified
- Who might be affected
- The level of risk
- Control measures required
- Who is responsible for implementation
- Review date
Step 5: Review and Update
Construction sites change constantly. Review your assessment:
- When site conditions change
- When new activities begin
- After accidents or near-misses
- At regular intervals (at least weekly for dynamic sites)
Construction Risk Assessment Template
A typical construction risk assessment includes:
| Section | Content | |--------|---------| | Project details | Site address, contractor, date | | Activity | Description of work being assessed | | Hazards | List of identified hazards | | Persons at risk | Workers, public, specific groups | | Risk rating | Low/Medium/High before controls | | Control measures | Existing and additional controls | | Residual risk | Risk level after controls | | Responsible person | Who implements controls | | Review date | When to reassess |
Common Mistakes to Avoid
- Generic assessments - Each site and activity needs specific assessment
- Ignoring subcontractors - They must be included in your assessment
- Not updating - Conditions change daily on construction sites
- Paperwork only - Assessments must be communicated and implemented
- Missing temporary works - Scaffolds, excavations, and temporary structures need assessment
Legal Requirements
Construction risk assessments must comply with:
- Management of Health and Safety at Work Regulations 1999 - General risk assessment requirement
- CDM 2015 - Construction-specific requirements
- Work at Height Regulations 2005 - Falls from height
- Control of Substances Hazardous to Health (COSHH) - Hazardous substances
- Manual Handling Operations Regulations - Lifting and carrying
Create Your Construction Risk Assessment
Using our risk assessment generator, you can create a professional construction risk assessment in under 60 seconds:
- Describe your construction activity
- Our AI identifies relevant hazards and control measures
- Review and customise the assessment
- Export as PDF for your site records
Create Your Construction Risk Assessment
Summary
Construction risk assessments are essential for protecting workers and meeting legal requirements. They must be:
- Specific to your site and activities
- Regularly reviewed and updated
- Communicated to all workers
- Implemented with proper controls
Key hazards in construction include working at height, moving machinery, excavations, hazardous substances, and electrical hazards. Each requires specific control measures documented in your assessment.
Further Resources
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