Dismantling of the scaffolds shall coincide with the demolition progress. When the wall ties are disconnected due to the demolition of the building structure, the unsecured section of the scaffolds shall be removed accordingly. The unbraced sections shall not be higher than 2m from the nearest anchor.
The requirements of the Code of Practice for Metal Scaffolding Safety and the recommendations from manufacturer shall be followed.
Furthermore, as a minimum, the scaffold shall be able to support the live load imposed on three consecutive layers of work platform plus its own weight. Additional loading conditions, if any, shall be included in determining the allowable height for the scaffoldings. Tie to existing structure shall be in accordance with manufacturer’s recommendations.
The requirements of the Code of Practice for Bamboo Scaffolding Safety have to be complied with.
In addition, structural ties to the building structure shall be provided in accordance with manufacturer’s recommendations. Bamboo scaffold shall be tied to sound anchors at intervals of not more than 4m in both horizontal and vertical directions.
If the scaffold is higher than 15m, steel brackets anchored to the existing building structure or other support system shall be provided at interval of not more than 15m to support the scaffold.
The erection, dismantling and safety requirements of the work platforms and scaffold shall be in accordance with the Construction Sites (Safety) Regulations and the relevant codes of practice on scaffolding safety issued by the Labour Department. The works shall be carried out by trained workmen under the immediate supervision of a competent person.
Supports for the scaffolds should be of adequate strength to hold the vertical and lateral loads imposed on the scaffolds including the catchfans, work platforms, etc. In case when elevated supports are required to receive the weights of the scaffolds, be they the steel brackets and anchors fixed to the existing building or other kinds of supporting system, they shall be designed by a Registered Structural Engineer. Where working platforms are required to facilitate working at height, they shall be properly constructed and provided on the three consecutive lifts directly below the floor being demolished with toe boards provided at the outer edge. Periodic maintenance shall be performed to remove any debris accidentally falling out of the building and accumulated on the platforms.
Site Safety | Code of Practice for Demolition of Buildings 