• Demolition Plan and Stability Report including CalculationsDemolition Plan

A Demolition Plan shall include the following :

• A plan showing :
  • the location of the building to be demolished;
    • a detailed topography of the site and its surrounds together with ground level contours and sections of the slopes and ground supported by the building where appropriate;
    • details of ground removal and/or backfilling; and
    • the distances from the building to be demolished to its adjacent buildings, streets, structures and significant street furniture.

• A layout plan of all floors of the building to be demolished, with adequate sections, showing :
  • the occupancy usage of the floors;
    • the structural support systems;
    • principal materials of construction;
    • the condition of the building e.g. the degree of deterioration; and
    • the relationship of the building to be demolished with neighbouring properties affected by the demolition, which include all adjoining buildings and unauthorized structures, shared staircases, party walls, truncating continuous frames, slopes, retaining wall, overhead cables, guy wires and underground utility services.

• A plan showing the structural arrangement and construction of all unconventional structural elements, such as prestressed concrete structures, precast concrete members, stressed skin structures, steel framed structures, hangers, hanging ties, trusses or Vierendeel girders, deep beams, long span beams (greater than 10m), arches, transfer plates, transfer girders, earth retaining or basement structures, buildings which also act as earth-retaining structures supporting adjacent ground, flat slabs, hollow block ribbed slabs and large cantilevered structures;
  • A plan showing the procedure for the demolition of the building; detailed sequence of demolishing particular structural members; and the method of demolition to be adopted including the restrictions on the use of any particular type of equipment;
    • In the case when powered mechanical plants and equipment are used, a plan showing the route of movement of powered mechanical plants and equipment including the method of lifting mechanical plant, where necessary, onto the top floors of the structure; any structural alterations required to suit the demolition, e.g. temporary strengthening to suit early removal of any ground floor/or cockloft structure to facilitate vehicular movement at ground floor, or strengthening of deteriorated key structural members; and any shoring, temporary supports and/or floor propping required;

• A plan showing all precautionary measures for the protection of the public including hoardings, covered walkways, catch platforms, catchfans, scaffolding, protective screens and safety nets;

• A plan showing the proposed shoring and precautionary measures for all affected adjacent buildings, slopes, retaining structures and services at each stage of the demolition works;

• A plan showing the proposed shoring and temporary support to be provided to the building to be demolished;

• A plan or descriptive notes on the proposed methods for handling and disposal of debris including :

• the permissible temporary accumulation of building debris at upper floors and at ground floor;
  • method of handling demolished building debris;
    • the routing and movement of debris from each floor to on grade holding area prior to leaving the site;
    • means of transportation of debris off the site;
    • time and frequency of debris disposal off site;
    • record scheme on the tonnage of each truck load, truck licence plate, driver’s name, trip tickets and location of dump site;
    • the site supervisory personnel responsible for the debris management system; and
    • a temporary parking layout for mobile machines and trucks, if necessary;

• Stability Report including Calculations

According to Building (Administration) Regulation 8(4), the Demolition Plan must be accompanied by a Stability Report with supporting calculations. The Stability Report shall include the following parts :

• a report on the stability of the building to be demolished during all stages of demolition;

• in the case when powered mechanical plants or equipment are used, a report on the stability of the building with supporting calculations to demonstrate that the use of the plants and equipment will not render inadequate the margin

of safety of, or cause damage to any building, structure, street, land and services;

• in the case when powered mechanical plants or equipment are used, structural calculations for all temporary supports and bracings;

• a report on the stability of neighbouring buildings, adjoining properties as stated in 2.1.1.(B)(5), party walls, streets, land and services which may be affected by the demolition work;

• in the case when temporary or permanent supports are required to these neighbouring buildings, adjoining properties, and party walls, structural calculations for these temporary and permanent supports; and

• a report with calculations demonstrating that the demolition work will not render inadequate the margin of safety of, or cause damage to any building, structure, street, land and services.

A checklist for preparing a Demolition Plan and Stability Report with Calculations is depicted in Appendix B.