A structural audit is a stamped assessment of a building's load-carrying capacity by a licensed Chartered Structural Engineer. In Bengaluru, BBMP treats it as both a compliance step and a safety instrument — and for Resident Welfare Associations of buildings over 30 years old, it is no longer optional. Srushti has delivered audits across 120+ projects in Karnataka since 2010, with zero structural failures on record.
[ 01 ]
When BBMP requires an audit.
01
Age threshold
BBMP mandates an audit for buildings older than 30 years. Many Bengaluru apartments built in the 1990s are now due.
02
Visible distress
Cracks wider than hairline, spalling concrete, exposed or corroded reinforcement, water seepage tracking through slabs, or differential settlement.
03
Change of use or load
Converting residential to commercial, adding floors, installing heavy equipment, or rooftop additions like solar arrays and water tanks.
04
Post-event assessment
After a fire, flood, vehicle impact, adjacent excavation, or a seismic event — even when damage looks superficial.
[ 02 ]
The NDT process, step by step.
Non-Destructive Testing answers a single question — what is the building's true capacity today, after decades of weather, use, and unrecorded modifications? A complete NDT programme combines several techniques because no single test sees everything.
01
Visual condition survey
Systematic walk-through with photographic record. Crack mapping, deflection observation, and a defect register tied to drawings.
02
Rebound hammer
Surface hardness across columns, beams, and slabs to flag low-strength zones for deeper testing.
03
Ultrasonic Pulse Velocity (UPV)
Internal uniformity check. Identifies voids, honeycombing, and concrete that has lost integrity behind a sound surface.
04
Half-cell potential & cover meter
Maps active reinforcement corrosion and verifies rebar location and concrete cover against the original design.
05
Carbonation depth & chloride profile
Quantifies how far the protective alkalinity has receded — the leading driver of rebar corrosion in coastal-influenced Bengaluru air.
06
Core extraction & lab testing
Targeted cores from suspect members for compressive strength, density, and petrographic analysis. Patched per IS 516.
[ 03 ]
The remedial roadmap for RWAs.
An audit is only useful if the RWA can act on it. A well-written report gives the committee a defensible plan — categorised, costed, and sequenced — so corpus funds get spent on the right intervention in the right order.
01
Categorise distress
Each member is graded: serviceable, repairable, strengthen, or replace. Categories drive priority and budget.
02
Immediate safety actions
Propping, evacuation of specific units, or load restrictions where capacity has fallen below code demand.
03
Repair scheme & specification
Micro-concrete jacketing, FRP wrapping, epoxy injection, anti-carbonation coating, or section enlargement — chosen against the defect, not the catalogue.
04
Tender, execute, supervise
BoQ, contractor selection, and stage-wise supervision so the repair is built to the spec — not value-engineered into the next audit.
05
Re-audit & documentation
Post-repair NDT, an updated as-built record, and a maintenance calendar handed to the RWA so the building stays out of the distress cycle.
[ 04 ]
Frequently asked.
Is a structural audit mandatory in Bengaluru?
BBMP requires structural audits for buildings older than 30 years and for any structure showing visible distress — cracks, spalling concrete, exposed reinforcement, or differential settlement. Audits are also triggered by change of use, vertical addition, or post-event assessment.
Who can carry out a structural audit?
A licensed Chartered Structural Engineer empanelled with the local authority. The signed and stamped audit report is what BBMP and insurers accept.
How long does an apartment audit take?
Two to four weeks for a typical residential block — visual survey, non-destructive testing, core extraction and lab results, capacity re-evaluation, and the stamped report with a remediation plan.
What does NDT include?
Rebound hammer for surface hardness, UPV for internal uniformity, half-cell potential for reinforcement corrosion, cover meter for rebar location and concrete cover, and carbonation depth testing. Cores are extracted for lab compressive strength where indicated.
[ Next step ]
Need a structural audit for your Bengaluru building?
Srushti is BBMP-empanelled and has delivered 120+ projects across Karnataka with zero structural failures. We work directly with RWAs, building owners, and facility managers.