Prior to carrying out any building demolition, detailed building appraisal by means of surveys and appropriate assessments shall be required. In general, the surveys shall include a Building Survey and a Structural Survey with photographs or videos taken for future reference. Based on the findings of these surveys, a demolition plan shall then be prepared
Building Survey
Prior to the Building Survey, the existing record plan, including layout plan showing adjoining properties, pedestrian walkway, roads and street, etc. shall be retrieved.
Potential dangerous areas, e.g., abnormal layouts, presence of enclosed voids, and non-ventilated light wells which may trap obnoxious gas at the bottom.
Unless the Building Survey reviews that no obvious hazardous material is present in the building, the Authorized Person shall cause proper sampling and testing for the hazardous materials;
Prior to the Structural Survey, the existing record layout, structural framing plans and structural details shall be studied. The Registered Structural Engineer shall check the presence of unusual detailing that may cause abnormal structural behavior during demolition, e.g., upward anchor of tensile reinforcement in cantilevered structures. If existing record plans are available, these plans shall be used as reference and preferably be brought along with the Structural Survey.
Demolition Plan
1) A plan showing :
the location of the building to be demolished, 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.
(2) A layout plan of all floors of the building to be demolished, with adequate sections,
(3) 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.
(4) A plan showing the proposed shoring and temporary support to be provided to the building to be demolished.
Stability Report including Calculations
(1) a report on the stability of the building to be demolished during all stages of demolition;
(2) in the case when powered mechanical plants or equipment are used, structural calculations for all temporary supports and bracings;
(3) a report on the stability of neighboring buildings, adjoining properties
(4) 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.
Utilities
Termination of Utilities (electricity, gas, water, sewage, etc.)
Effects of Demolition on Utilities should be considered.
Hoarding and Covered Walkway
Comments