This unit focuses on the practical competencies and underpinning knowledge required to safely dismantle and demolish masonry and concrete structures on sit
Topic Synopsis
This unit focuses on the practical competencies and underpinning knowledge required to safely dismantle and demolish masonry and concrete structures on site. Learners must demonstrate the ability to interpret project information, apply relevant health and safety legislation (e.g., CDM 2015), select appropriate resources and techniques, and protect the surrounding environment while completing work to the specified contract requirements within allocated timeframes.
Key Concepts & Core Principles
- Risk Assessment and Method Statements (RAMS): Understanding how to identify hazards, assess risks, and develop safe systems of work for demolition activities, including structural collapse, dust control, and noise management.
- Demolition Techniques: Knowledge of mechanical demolition (using excavators with attachments), explosive demolition (controlled blasting), and manual demolition (hand tools) for different structures like concrete, steel, and masonry.
- Asbestos Awareness and Removal: Recognition of asbestos-containing materials (ACMs), legal requirements under the Control of Asbestos Regulations 2012, and safe removal procedures to prevent fibre release.
- Structural Engineering Principles: Understanding load paths, building stability, and how to sequence demolition to prevent uncontrolled collapse, including the use of temporary supports and propping.
- Environmental Management: Compliance with waste hierarchy (reduce, reuse, recycle), segregation of materials, and disposal of hazardous waste in accordance with Environmental Protection Act 1990.
Exam Tips & Revision Strategies
- Photograph every stage of the demolition process, including pre- and post-task area inspections, to provide strong visual evidence of safe working and area protection.
- Maintain a daily site log recording weather conditions, personnel, tasks completed, and any unexpected occurrences—this supports time management and problem-solving criteria.
- Cross-map each piece of evidence to the specific learning outcomes using a tracking sheet to ensure full coverage before submitting your portfolio.
- If working as part of a team, secure a detailed witness statement from your supervisor that explicitly describes your individual contribution to dismantling activities and adherence to specifications.
Common Misconceptions & Mistakes to Avoid
- Overlooking a pre-demolition structural survey, leading to risks such as unanticipated pre-stressed concrete elements or hidden live services.
- Using excessive mechanical force near fragile adjoining structures, causing collateral damage to retained walls, foundations, or neighbouring properties.
- Neglecting to wear appropriate respiratory protection when cutting or breaking concrete, resulting in inhalation of respirable crystalline silica.
- Failing to damp down debris regularly, allowing airborne dust to spread beyond the site boundary and breaching environmental controls.
- Misinterpreting temporary works requirements, leading to inadequate propping and potential partial collapse of the structure before planned demolition stages.
- Omitting to segregate hazardous materials (e.g., asbestos sheets concealed within masonry) identified during the works, violating waste management legislation.
Examiner Marking Points
- Award credit for accurately interpreting risk assessments, method statements, and engineering drawings prior to commencing any demolition activity.
- Evidence must show selection and correct use of demolition tools and equipment (e.g., hydraulic breakers, hand saws, or diamond drilling) appropriate to the masonry/concrete material and structural condition.
- Credit for demonstrating safe working practices including the erection of exclusion zones, debris chutes, and installation of temporary propping or shoring where required.
- Provide evidence of implementing dust suppression measures and wearing correct RPE to control silica dust exposure during concrete demolition.
- Assessor to verify that work was completed within the agreed programme, with any delays promptly communicated and recorded.
- Portfolio evidence must demonstrate compliance with contract specifications, such as achieving the required finish levels or sorting materials for recycling as per the waste management plan.