'class 1', in relation to demolition work, means demolition work of any of the following kinds:

• work comprising the total demolition of a building or structure that is 10 metres or more in height when measured from the lowest ground level of the building or structure to the highest part of the building or structure;
• work
  • comprising the partial demolition of a building or structure that is 10 metres or more in height when measured from the lowest ground level of the building or structure to the highest part of the building or structure; and
  • affecting the structural integrity of the building or structure;
• work
  • comprising the total or partial demolition of a building or structure; and
  • involving the use of load shifting equipment on a suspended floor;
• work comprising the total or partial demolition of pre-tensioned or post-tensioned structural components of a building or structure;
• work comprising the total or partial demolition of a building or structure containing precast concrete elements erected by the tilt-up method of construction;
• work involving the removal of key structural members of a building or structure so that the whole or a part of the building or structure collapses;
• work done to a building or structure involving explosives;
• work comprising the demolition or partial demolition of a building or structure that involves the use of a tower crane or any crane with a safe working load greater than 100 tonnes;
• work involving the removal of an area of brittle or fragile roofing material in excess of 200m2 from a building or structure if any part of the area to be removed is 10 metres or more above the lowest ground level of the building or structure;

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