IS 4130:1991 is the Indian Standard (BIS) for demolition of buildings. This code prescribes safety requirements, precautions, and the systematic sequence of operations for the safe demolition of buildings to protect workers, the public, and adjacent properties.
Lays down methods and safety precautions for the demolition of buildings and structures.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Minimum Height of Protective Hoarding | Not less than 2.4 m from the ground level. | Typically 2.4 m, but must be 'of sufficient height' based on risk assessment and local authority requirements. | BS 6187:2011 |
| Unsupported Wall Height Limit | No part of a wall shall be left standing more than one storey high without lateral support. | No wall section, which is more than one story in height, shall be permitted to stand alone without lateral bracing. | OSHA 29 CFR 1926.854(b) |
| Enclosure of Debris Chutes | Chutes at an angle of more than 45° to the horizontal shall be entirely enclosed. | Material chutes at an angle of more than 45 degrees from the horizontal shall be entirely enclosed. | OSHA 29 CFR 1926.852(b) |
| Removal of Asbestos | General mention of controlling dust which is injurious to health, without specific asbestos protocols. | Mandates a formal asbestos survey and removal by licensed specialists before any other demolition work begins. | BS 6187:2011 |
| Opening in Floors | All floor openings to be protected by a substantial guard rail and toe-board or planking. | All floor openings shall be planked over or enclosed by a guardrail system. | AS 2601:2001 |
| Structural Engineering Input | Supervision by a competent 'engineer-in-charge' is required. | Explicitly requires a competent structural engineer for the design and planning of complex demolition sequences, especially for pre-weakening or induced collapse. | BS 6187:2011 |