Step-by-step explanation:
Task 1: Pouring Concrete Slab Task Analysis:
Step 1: Site Preparation
Hazard: Uneven terrain, buried utilities, and potential environmental hazards.
Risk: Trips, falls, cuts, electrocution, and hazardous material exposure.
Control Measures: Conduct site survey, obtain site plans, mark utility lines, and provide appropriate personal protective equipment (PPE).
Step 2: Formwork Installation
Hazard: Heavy lifting, repetitive motion, and potential structural instability.
Risk: Back strain, muscle fatigue, and collapse.
Control Measures: Provide mechanical lifting equipment, design stable formwork systems, and provide appropriate PPE.
Step 3: Reinforcement Placement
Hazard: Sharp and heavy objects, repetitive motion, and potential structural instability.
Risk: Lacerations, impalement, muscle fatigue, and collapse.
Control Measures: Provide appropriate PPE, design safe lifting and placement systems, and ensure proper bracing of reinforcement.
Step 4: Concrete Mixing and Pouring
Hazard: Dust exposure, heavy equipment operation, and chemical exposure.
Risk: Respiratory problems, collision, and chemical burns.
Control Measures: Provide adequate ventilation, use personal protective equipment, ensure equipment is in good condition, and follow manufacturer’s instructions.
Step 5: Finishing and Curing
Hazard: Dust exposure, repetitive motion, and chemical exposure.
Risk: Respiratory problems, muscle fatigue, and chemical burns.
Control Measures: Provide adequate ventilation, use personal protective equipment, follow manufacturer’s instructions for finishing and curing, and ensure proper curing time is allowed.
Task 2: Roofing Installation Task Analysis:
Step 1: Site Preparation
Hazard: Uneven terrain, potential electrical hazards, and environmental hazards.
Risk: Trips, falls, electrical shock, and hazardous material exposure.
Control Measures: Conduct site survey, obtain site plans, mark utility lines, and provide appropriate PPE.
Step 2: Roof Deck Installation
Hazard: Heavy lifting, repetitive motion, and potential structural instability.
Risk: Back strain, muscle fatigue, and collapse.
Control Measures: Provide mechanical lifting equipment, design stable roof deck systems, and provide appropriate PPE.
Step 3: Underlayment Installation
Hazard: Sharp objects, repetitive motion, and potential fall hazards.
Risk: Lacerations, muscle fatigue, and falls.
Control Measures: Provide appropriate PPE, ensure safe working conditions, and use fall protection equipment.
Step 4: Shingle Installation
Hazard: Sharp objects, repetitive motion, and potential fall hazards.
Risk: Lacerations, muscle fatigue, and falls.
Control Measures: Provide appropriate PPE, ensure safe working conditions, and use fall protection equipment.
Step 5: Roof Edge and Flashing Installation
Hazard: Sharp objects, repetitive motion, and potential fall hazards.
Risk: Lacerations, muscle fatigue, and falls.
Control Measures: Provide appropriate PPE, ensure safe working conditions, and use fall protection equipment.
Identify potentially hazardous waste material used on a typical construction site: One potentially hazardous waste material commonly used on a construction site is asbestos. Asbestos is a fibrous mineral that was widely used in construction materials for its insulating and fire-resistant properties. However, when asbestos-containing materials are damaged or disturbed, asbestos fibers can be released into the air and inhaled, leading to serious health risks such as lung cancer and mesothelioma. As a result, proper handling, removal, and disposal of asbestos-containing materials are critical to protecting the health and safety of workers and the environment.