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CHAPTER 2: SAFE METHOD OF WORKS - Coggle Diagram
CHAPTER 2: SAFE METHOD OF WORKS
2.1 Planning
Report consisting of structural calculations and all other affected buildings, structures, streets, land, and services.
2.1.1 Building appraisal and demolition
plan
Building
Survey
• Record drawings
• Structural survey items
• Hazardous materials
Structural
Survey
• Record drawings
• Structural survey items
• Structural survey for special structures
• Investigation and testing
2.1.2 Demolition Plan
Planning to undertake demolition work without creating risks and to execute it safely and orderly requires careful planning of each demolition stage.
A plan showing location, detailed topography, details of ground removal, distances
A layout plan of all floors of the building to be demolished with adequate sections showing occupancy usage of the floors, structural support systems, principal materials of construction & condition of the building.
The structural arrangements and construction of all unconventional structural elements.
The procedures for the demolition of the building.
All precautionary measures for the protection of the public.
The route of movement of powered mechanical plants and equipment including the method of lifting mechanical plant.
The proposed shoring and precautionary measures.
The proposed provision of shoring and temporary supports for the building to be demolished.
A plan with descriptive notes on the proposed methods for handling and disposal of debris.
2.1.3 Stability Report including Calculations
A report on the stability of the building to be demolished during all stages of demolition.
When the powered mechanical plants or equipment are used, a report on the stability of the building with supporting calculations to demonstrate that the use of the plants and equipment will not render inadequate the margin of safety of or cause damage to any building, structure, street, land, and services.
In the case when powered mechanical plants or equipment are used, structural calculations for all temporary supports and bracings
A report on the stability of neighbouring buildings and adjoining
properties
The engineer shall carry out the building and structural survey and then prepare a report on the demolition plan to be submitted to the local authority (Building Department).
2.2 Fire Precautions
All flammable goods shall be removed from the
site unless necessary for the works involved.
Firefighting appliances must be provided, maintained, and placed in a visible location adjacent to the staircase on each floor.
All flammable goods, including gasoline, flammable materials, oxygen, and acetylene bottles, should be stored in safe, protected areas.
All furniture, timber, doors, etc., shall be removed before any welding works are performed.
Adequate protective measures are provided to isolate the operation and prevent any potential fire from spreading.
2.3 Personnel Selection
1
Relevant
experience.
Past
performance
Understanding of the requirements.
2
Management
skills.
Compliance with the requirements of the scope of work.
Technical
skills.
2.4 Medical Services and First Aid
Before starting work, ensure prompt medical attention for serious injuries.
Ensure the nearest hospital, infirmary, clinic, or physician is located during the engineering survey, and provide the job supervisor with instructions.
Ensure proper equipment and communication systems are available at the job site for transportation and communication with ambulance services.
Post conspicuous hospital, physician, or ambulance phone numbers. A first-aid-trained person should be present if an infirmary, clinic, hospital, or physician is inaccessible.
A first aid kit, approved by an occupational physician, should be readily available at job sites, containing rubber gloves and quick eye drenching or flushing.
The kit should be checked weekly before each job to ensure items are replaced.
Local police, ambulance, and fire departments should be available at job sites for reporting traffic problems, uncontrolled fires, vandalism, unlawful entry, and accidents requiring police assistance.
2.5 Vehicular Safety
Vehicles used for transporting explosives shall be in good mechanical condition, and have tight floors, and any exposed spark-producing metal on the inside of the body shall be covered with wood or some other nonsparking material. No passengers should be allowed in any vehicle transporting explosives.
2.6 Inventory Handling and Safe Handling
All explosives must be accounted for at all times and all not being used must be kept in a locked magazine. A complete detailed inventory of all explosives received and placed in, removed from, and returned to the magazine should be maintained at all times.
2.7 Storage Conditions
Certain precautions must be taken to prevent accidental discharge of electric blasting caps from current induced by radar, radio transmitters, lightning, adjacent power lines, dust storms, or other sources of extraneous or static electricity.
These precautions shall include:
Ensuring that mobile radio transmitters on the job site that are less than 100 feet away from electric blasting caps, in other than original containers, shall be deenergized and effectively locked.
The prominent display of adequate signs, warning against the use of mobile radio transmitters, on all roads within 1,000 feet of the blasting operations.
Maintaining the minimum distances between the nearest transmitter and electric blasting caps.
The suspension of all blasting operations and removal of persons from the blasting area during the approach and progress of an electric storm.