NIEE - Center of Buildings and Structures Inspection


Building structures could be affected by external factors, such  as nearby foundation construction, excavation, vibration, and  environment etc. Moreover, buildings will gradually deteriorate  along their ages without proper maintenance, building defects  will occur such as concrete spalling, steel reinforcement corrosion,  deformation and cracking, water leakage, façade delamination,  etc. Hence, DEE provides technical services including building  structural inspection & monitoring, building public component  inspection, building water leakage inspection, and aluminum  window testings. 

  • Building Structural Inspection & Monitoring

To evaluate the structural condition of buildings, visual inspection  is an essential and fundamental step. Besides visual inspection,  non-destructive tests will be performed to obtain scientifi c data so  as to allow a more competent assessment. To evaluate mechanical  properties of concrete, taking cores for compressive strength test,  rebound hammer tests are the common practices. To evaluate the  durability of the structural element, halfcell potential measurement,  chloride content determination, carbonation tests, covermeter  for rebar location and petrographic analysis will be performed.  More new types of NDT will be studied on their feasibility and  applicability in structural inspection. 




Ultrasonic Test of Concrete Beam


Taking Concrete Cores

half cell4.JPG

Half-Cell Potential Measurement for Concrete Structures


Taking Concrete Powder for Chloride Content Determination


Crack Size Measurement

rebound hammer 4.JPG

Rebound Hammer Test on Concrete Slab


Steel Reinforcement Bar Locating with Covermeter


Tensile Load Test of Anchor Bolts

When building structural problem exists, or whenever there are  site works near to the existing buildings, structural monitoring  is an essential activity to be carried out, especially during piling,  demolishing and excavation. Building inclination, foundation  settlement, crack or joint width of a building, and ambient  temperature will be the main monitoring data to be obtained  so as to trace any tendency of structural problem development.  Automatic monitoring system will be the major development in  the coming future. Moreover, 3D Laser Scanning will be adopted  more and more in the field of building monitoring in which  millions of measurement (point cloud) allow more complete and  accurate measurement of the deformation of a structure. Vibration  measurement is also important to monitor the vibration effects on  the existing buildings. 

IMG_0755-tilt plate.JPG

Inclination angle monitoring with Tilt Plates and Portable Tiltmeter

IMG_3245-tilt plate.jpg

Inclination angle monitoring with Tilt Plates and Portable Tiltmeter


Installation of equipment for joint width monitoring between buildings

IMG_7133-joint meter.JPG

Joint width monitoring with electronic joint meter


Inclination monitoring of a column with electronic clinometer

IMG_5964-ambient tempeature_2345看图王.JPG

Ambient temperature  monitoring with electronic  temperature sensor 

IMG_8222-data loggering system.JPG

Automatic Monitoring System with datalogger and data transmission system

IMG_8227- joint meter.JPG

Crack width monitoring with electronic crack meter


3D Laser Scanning of Buildings 


Inclination angle measurement by 3D Laser Scanning Method


Vibration Measurement of Pile Driving

vibration monitoring 6.JPG

Vibration Measurement of Pile Driving


Steel Structures are common types of structures adopted by  structural designers, such as stadiums, swimming pools, monuments,  etc. Corrosion, welded joint defects, crackings and deformation are  the most common problems occur in steel structures. Besides of  the quality consultancy service on new steel structures construction  projects, DEE also provides technical service on steel structure  inspection and load capacity evaluation. 

  • Quality consultancy service

DEE has prepared MCQ and ARP of steel structure works, mainly  to provide quality control procedure for the public projects.  Inspection to steel factory is an essential activity to verify the  implementation condition of quality control works in that factory,  in terms of material control, fabrication control, welding control,  coating control and delivery control. 


Steel Material Control in Factory


Welding Process in Factory


Fabrication in Factory


Steel Components before Delivery

  • Steel Structure Inspection

DEE provides inspection to evaluate the structural condition and the  durability condition of steel structures. Corrosion situation could be  identifi ed by visual inspection and verifi cation of the corroded steel  section thickness can be performed with ultrasonic thickness gauge.  As good welding works ensure a safe and good quality connection  between steel structural members, welding inspection is essential to  ensure the quality of the welding joints. Besides traditional NDT  such as Magnetic Powder Inspection (MPI) and Ultrasonic Test  (UT), LECM has introduced Eddy Current Inspection, by which the  defects of the joints of an existing steel structures (such as surface  fatigue cracks) could be inspected without the complete removal of  the surface coating.   


Arco do Oriente

IMG_2342 東方拱門.JPG

Platform for Inspection of Arco do Oriente

IMG_7557 威尼斯人 MPI.JPG

Inspection of Steel Structures


Bamboo platform for Inspection of Steel Structural roof


Welding joint inspection


Welding joint inspection

IMG_0010 科學館 MPI.JPG

MPI for steel section joints


MPI for Steel Bar Cages of Bored Piles

IMG_0022 觀光塔 UT.JPG

UT for Steel Stair Cases

DSCF4409 媽閣中樞輸紐 UT.JPG

UT for steel section joints of Diaphram Wall

IMG_2535 東方拱門 ET.JPG

Eddy Current Inspection

IMG_5057 Stud WPS VT.JPG

Welded Shear Stud Inspection

  • Load Capacity Evaluation

Load capacity evaluation could be carried out with on site structural  loading test together and structural numerical model simulation.  By measuring the deformation or stress/strain with the applied  load on the targeted structural members, the structural behavior or  any design assumption could be verifi ed. Moreover the structural  numerical model could be calibrated by the loading test results so as  to provide more solid structural assessment. 


Hanging load test of steel space frame Structure


Loading application to the steel structure


Numerical Model Simulation


Numerical Model Simulation


Loading Sand Bags applied on the steel structure


Deformation recording


Deformation measurement with digital gauges