Demolition Flashcards
What is demolition?
Removing any building structure or part of it in a pre- planned and controlled manner.
What are the demolition principles?
Design life
The destroying of a building in a controlled manner.
What are the 3 times demolition is needed?
When the building is old or damaged and needs removing.
If any internal changes are to be made
When the design life of the building is complete.
What 5 risk assessments are used for demolition?
Risk to operatives during demolition
Risk to the future structural integrity of the building
Risk to the public during demolition work
Risk arising form hazardous materials present
Risk from the disposal of the demolition
What are the legislations of demolition?
Building regs 2010
Construction (design and management) regs 2015
Town and country planning direction 1995
Environmental protection act 1990
Building act 1984
Control of substances hazardous to health reg 1999
British standard code of practice for demolition bs6187
What surveys are required for demolition?
Building survey
Structural survey
What is a demolition plan, what is it based on and who is it submitted to?
A plan for demolition, it is prepared on the basis of the building survey. It is submitted to the local authority.
What are 10 things that are included in a demolition plan?
Plan of the building’s location
Details on the Height, structural system and the damage of the building
Layout plan
The method of demolition
Safety measures
Sequence of demolition steps
Details of machinery used
Plan of handling and disposal of debris
Arrangements for site supervision
What 6 things affects the demolition method used?
Type of structure
Size of structure
Time frame
Location
Surrounding structures
Noise, dust and company limits
What non-engineering technique is used in demolition?
Manual demolition
What are the 3 safety measures before and during demolition?
The disconnection of services (gas, electric, water, drainage, and sewage)
Placing signage, barricades, red lights.
Provide ppe, first aid box, fire extinguisher
What are the dust and noise rules?
Demolition work should not be done between 7pm-7am
Continuous water to prevent dust flying
What are the advantages of demolishing an old building?
Removing a building can increase property value and eliminate any safety risks to the public
What 9 engineering techniques are used in demolition?
Wrecking ball method
Pusher arm technique - machine with scoop
Thermic lance technique - hot metal lance used to burn concrete and steel
Concrete sawing method - used to cut sections of a building. Big circular saw used
Implosion technique
Non- explosive demolition
Deliberate collapse method
Pressure jetting method
Bursting
