Document ID: chunk:federal_register_of_legislation:F2016L00409:body:0:p26
Version: federal_register_of_legislation:F2016L00409
Segment Type: other
Provision Reference: 
Character Range: 66056–68972

openings before the commencement
of the demolition work.
Walls and gables should be demolished course by course. All work should be performed from safe working platforms. Workers should not work from the top of a wall or partition being demolished. A wall or partition should not be permitted to stand, unless it is effectively supported against collapse including being supported against lateral loads from wind and other forces.
If the demolition work involves the demolishing course by course of any walls, columns, piers
or other vertical structural members, the demolition contractor should check that:
    * risks to persons and property from falling collapsing and rebounding material are eliminated or minimised, and
    * the remaining portion of the building or structure, if any, can withstand any loads, impacts and vibration caused by felling or other environmental factors such as wind.

Manual demolition of floors and members
All floors and other surfaces used to support workers, plant, equipment or materials should be assessed as capable of supporting the load. Suspended floors and their supporting members should not be loaded by workers, plant, falling or accumulated debris/materials to the extent that there is excessive deflection, permanent deformation or danger of collapse. If water is used, the increased weight of the watered debris should be taken into account. For further information refer to AS 260: The demolition of structures.
Openings in floors, through which a person may fall, shall be properly guarded or boarded
over and the boarding secured against accidental removal. Any covers or boarding of openings in floors should be of sufficient strength to withstand any expected loads that may be imposed on the floor, for example elevating work platforms, people and material. Drop zones should be isolated and/or guarded to protect workers and the public from falling objects.
When jack hammering concrete floors, sufficient reinforcing steel should be left in position as protection against collapse or to prevent persons falling through the floor.

Manual demolition of frameworks
Before any framework is demolished or removed, all reasonably practicable precautions should be taken to prevent the rest of the building collapsing as a result.

A competent person (for example a structural engineer) should undertake an assessment to determine the necessary supports required when cutting members. Members should not be cut unless they are supported safely and effectively. Measures should be taken to prevent sudden spring, twist, collapse or other movement of the framework when it is cut, released or removed.

Any framework which is not demolished should be strong enough to remain safely in position,
or should be guyed or otherwise supported to ensure that it will be stable in any adverse
weather conditions.

Framework members should be lowered in a controlled manner.