Goregaon(E) - 400065. Andheri(W) - 400058 gnassociates530@gmail.com

Structural Audits & NDT – Because Safety Comes First

Services

Structural Audit & NDT

Every building, whether residential, commercial, industrial, or heritage, is designed with a defined service life. However, due to factors such as poor construction quality, corrosion of steel, water leakages, exposure to harsh weather, and inadequate maintenance, many structures begin to deteriorate much earlier than expected. In some cases, this can even lead to partial failures or collapses before the end of their intended lifespan.

To safeguard occupants and preserve the building’s value, it is essential to monitor the health of a structure at regular intervals. A Structural Audit is a systematic technical examination carried out by licensed structural engineers to assess the condition, safety, and serviceability of a building. It not only identifies visible defects but also detects hidden weaknesses through advanced testing.

Structural audits are often the first and most important step before repairs, restoration, or redevelopment. They provide a clear picture of the building’s present health, help in planning the scope of necessary interventions, and ensure compliance with legal requirements laid down by authorities such as the BMC.

    Why structural audit is important?

  • Ensures safety of residents and occupants.
  • Identifies hidden defects and risks before they become critical.
  • Determines the scope of repairs, retrofitting, or strengthening.
  • Helps in planning budgets and timelines for building maintenance.
  • Fulfills legal requirements laid down by authorities like the BMC.
  • Gives clarity on further processes to be carried out ( eg- repair, redevelopment etc ).

    What we assess

    During a structural audit, our engineers carry out a detailed evaluation that includes:

  • Structural Cracks – Cracks in R.C.C. members such as beams, columns, and slabs.
  • Leakages & Seepage –

    Through external plaster, terraces and parapet walls

    From overhead and underground water tanks

    From bathrooms, kitchens, and plumbing lines/joints

  • Corrosion & Deterioration – Assessment of steel reinforcement corrosion, carbonation, and material quality.
  • Visual & NDT Inspections – Use of rebound hammer, ultrasonic pulse velocity, and other tests to check concrete strength and durability.
  • Appearance & Finishes – Shabby look due to damaged paint, dampness, and surface deterioration.
  • External Areas – Condition of compound paving, drainage, and other civil works.
HOW WE WORK

Non-Destructive Tests

As part of the Structural Audit, we conduct a series of tests to assess the building’s strength. These evaluations enable us to prepare a detailed report along with the estimated cost of repairs, which serves as the basis for carrying out the necessary work to enhance the building’s safety, durability, and functionality.”

Rebound Hammer Test

A simple and quick method to check the surface hardness of concrete. It provides an estimate of the compressive strength and helps identify weak or deteriorated concrete areas, making it a widely used preliminary assessment tool.

Thermal Imaging

Ultrasonic Pulse Velocity (UPV) Test

This test measures the speed of ultrasonic waves passing through concrete. It helps determine the homogeneity, presence of internal cracks, voids, or honeycombing, and provides insights into the overall quality of the structure.

Ultra Pulse Velocity

Carbonation Test

Carbonation reduces the alkalinity of concrete and makes reinforcement prone to corrosion. This test determines the depth of carbonation and helps assess the durability and remaining life of the concrete structure.

Thermal Imaging

Half-Cell Potential Test

Used to assess the probability of reinforcement corrosion in RCC structures. By measuring the electrical potential of embedded steel, it helps engineers evaluate areas most at risk and plan effective repair strategies.

Ultra Pulse Velocity

Cover Meter Test

A non-invasive test to measure the concrete cover depth and locate reinforcement bars. Adequate cover is vital for durability, fire resistance, and protection against corrosion, making this test an important quality check.

Thermal Imaging

Chemical Analysis Test

Concrete samples are analyzed to detect harmful chemicals such as chlorides, sulfates, and alkalis. These chemicals accelerate steel corrosion and structural deterioration, and the test provides insights for selecting proper repair methods.

Ultra Pulse Velocity

Core Test

Considered a confirmatory test, it involves extracting a cylindrical core sample from concrete to directly determine compressive strength and internal quality. Core testing provides highly reliable data for audits and rehabilitation planning.

Thermal Imaging