Structural Diagnostics and Utility Survey
Radar survey of ducts
Non-destructive and invasive techniques to determine the location of defects in structures. Similar techniques are applied to utility detection.
FT can draw upon its NDT and chemical testing laboratories to provide a comprehensive suite of tests to evaluate the condition of structures.

Tests are typically applied to evaluate the condition of concrete by determining its thickness and locating any voids, ducts and reinforcing bars.
Benefits of using FT's service
. FT's tests such as Impact Echo and radar survey (GPR) allow one-sided testing, therefore access to both sides of a structural member is not required.
. Some of the tests are HOKLAS accredited as listed in HOKLAS Directory of accredited laboratories- see Qualifications section for links.
. FT is able to offer a choice of 3no antenna for Ground Penetrating Radar. The correct choice of radar is essential for a successful investigation.
. Related services - NDT and Survey.
Impact Echo thickness measurement of floor
Services offered include:
Carbonation test

Þ Determines the location of the carbonation front in concrete

Covermeter survey

Þ Locating reinforcing bars and concrete cover

Ground Penetrating Radar (GPR)

Þ Location of ducts, rebar, tendons and voids
Þ Utility detection

Half cell potential measurement

Þ Corrosion estimation of rebar

Impact echo

Þ Detect inhomogeneities and detect concrete thickness
Infrared thermography
Þ Detect inhomogeneities close to concrete surface, particularly walls and tiles

Radiographic survey

Þ Determination of inhomogeneities
Schmidt hammer (surface rebound hammer)
Þ Determination of inhomogeneities

Visual inspection

Þ Crack assessment by experiences inspectors
Þ Endoscope
Impact Echo result
Utility Scan with GPR

Technical Enquiry :
Mr. H.M. Siu
Tel: +852 2758 4861

Deputy Contact Person :
Mr. W.C. Yue
Tel: +852 2758 4861