Before commencement of demolition of a multi-storey structure, which action must be taken FIRST as per IS 4130?
Choose the correct answer
Remove all glass panes, fittings and furniture
Disconnect all utility services — electricity, gas, water and drainage
Erect scaffolding and protective netting around the perimeter
Remove non-structural partition walls from the upper floors
Correct Answer
B. Disconnect all utility services — electricity, gas, water and drainage
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IS 4130 (Safety Code for Demolition of Buildings): first step is disconnecting all services. Live electrical, gas or water lines during demolition are lethal. Sequence: services disconnected → survey and structural assessment → shoring plan → hazardous material removal (asbestos) → systematic demolition top-down. Safety is non-negotiable.
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