Zone V retrofit for older RCC frames
Column and beam jacketing with steel angles, ties, and high-strength grout — brings pre-code Guwahati buildings closer to modern ductile behaviour.
Pre-2005 buildings often lack ductile detailing
Jacketing adds confinement reinforcement so columns can deform without brittle shear failure during earthquake.
Services
RC jacketing
Additional concrete and steel around existing column.
When: Severely under-strength columns with space available
Risk: Brittle column failure causes pancake collapse.
Steel jacketing
Steel cage with grout fill for rapid retrofit.
When: Occupied buildings needing faster execution
Risk: Delaying retrofit in Zone V is gambling with lives.
Works with NDT and structural audit
Jacketing scope driven by capacity calculation — not one-size template.
Old building in Guwahati? Seismic screening before next tremor season.