Guidelines for the Removal of Typical Unauthorized Building Works ...

5. Repair of external wall finishes,architectural features, windows etc5.1 Whilst carrying out general maintenance work to external walls ofbuilding, owners should ensure that such works are carried out withproper regard to public safety. A double bamboo scaffold withsuitable tarpaulin, netting and working platform should be erected onthe external walls to prevent the accidental falling of any debris beforethe commencement of any maintenance and repair work on externalwall. The scaffold shall be erected in double rows with transomsbetween the rows to provide a working platform at all working levelswhere work can be carried out safely. Bracing should be provided allover the inner and outer scaffold planes. Sufficient ties to the buildingstructure shall be provided to ensure stability.5.2 Catchfans shall be installed at a vertical distance of not more than 10mbelow the working platform, and at vertical intervals of not more thaneight storeys apart. A minimum clear headroom of 5.5m above streetlevel (within 500mm distance from edge of carriageway) should bemaintained to prevent any obstruction to vehicular traffic.5.3 Typical double row scaffold with working platform and catchfan hasalready been given in fig 4 and 5.Buildings DepartmentApril 2002