Demolition Work - Demolition works including demolition or dismantling of the structure or part of a structure, whether buildings, bridges and other construction. Various methods are used to either load-bearing or other relevant changes in the physical integrity of the structure. Demolition work has the potential to seriously injure or cause death. It is classified as one of high risk in construction works.
- Before demolition operations begin:
(i) adequate inspection should be made by designated person;
(ii) if necessary to prevent danger, unstable parts of the structure should be made secure; and
(iii) all utilities should be effectively disconnected or shut off at or outside the property line.
- The danger zone around the structure should be adequately fenced off or warning sign posted.
- Before the commencement of demolition work, the structure should be free from any toxic or hazardous substances (e.g asbestos materials).
- Where applicable metal scaffold enclosed with peripheral nettings should be erected around the building or structure to be demolished.
- Before demolition work is carried out, ensure that these materials are removed:
(i) glass in doors, windows, etc;
(ii) loose objects;
(iii) projecting parts and
(iv) explosive, inflammable, toxic and harmful substances
Catch Platforms for Demolition Operations
- During the demolition of the exterior walls of a structure originally more than 12.2 metres high, catch platforms shall be provided along the exterior, faces of such wall, where necessary, to prevent injury to the public.
- Such platform shall be designed by a Professional Engineer and certified for safety prior to erection and use.
- Such catch platform shall be maintained not more than 6 metres below from which the exterior walls are being removed.
- Catch platform shall not be used for storage of materials or be used as working platforms or walkways.
During Demolition
- During demolition work, the contractors should:
(i) provide workers and public the appropriate information related
to safety and health hazards during demolition works;
(ii) follow demolition sequence and method as provided by
demolition/structural engineer;
(iii) ensure the site in a safe condition and in compliance with safety and health plan requirements;
(iv) provide workers with all the appropriate personal protective equipment (PPE) related to safety and health risks they are exposed to; and
(v) take adequate steps to keep the debris or area being worked on sufficiently moist to lay the dust.
