Email all enquiries to: testing@hendersonthomas.co.uk

Bridge Testing

Employing the latest NDT including Robotics

HTA are the leading experts in Bridge Testing, from introducing Robotics to the UK, alongside 30+ years of experience, your project will always be in safe hands.

A Multi Disciplined & Multi Skilled Approach is paramount when working on bridges, HTA offer a full remit of services therefore removing the hassle of project managing multiple companies on site.


Bridges are complex in nature and makeup
access & completion always requires careful planning
therefore it is vital to employ competent engineers


We supply the following tests on their respective bridges

The following lists are not exhaustive, however they give a good idea of the scope of work HTA can fulfil.

Bridge Testing with Multiple Teams from HTA

Concrete Bridges

  • Covermeter surveys
  • Half-cell potential surveys
  • Resistivity surveys
  • Linear Polarisation Surveys
  • Crack Surveys
  • Visual + PI Surveys
  • PUNDIT Surveys
  • Carbonation depth surveys
  • Extraction of dust and core samples for subsequent laboratory testing

Steel Bridges

  • Ultrasonic Thickness Surveys (determine corrosion)
  • Weld Testing
  • Extraction of samples for determination of material type / strength / chemical composition (for welding specifications)

Masonry Bridges

  • Strength Testing - Removal of samples of masonry / mortar for lab tests
  • Make up testing - determination of construction details via NDT & intrusive methods

Cable Stay Bridges

  • Visual Survey - using 4No. HD Cameras
  • Magnetic Flux Leakage Testing - to determine loss of metallic area - see image below

The results are represented as graphs highlighting the LMA per area​. These can be used to interpret individual strand and the defect that has occurred​. The percentage of LMA can then be used to determine the severity of the issue and the remediation methods required

Magnetic Flux Leakage Test Result - HTA

Maximise the above Bridge Testing with the following:

HTA can provide a Full Remit of services, removing the hassle of managing multiple companies on site and are able to undertake and supply the following:

  • Traffic Management - supply of Chapter 8 lane closures
  • Access including
    1. - MEWPS
      - Mobile Scaffold
      - Underbridge Units
      - Roped Access
      - Drones
  • Working near water, supply of the following:
    1. - Pontoons
      - Safety Boats
      - 'RYA' & 'DEFRA" Certificated & Trained Staff
      - Roped Access
      - Drones
  • Reinstatement including
    1. - Concrete
      - Masonry & Brickwork
      - Waterproofing
      - Trial Pits
      - Carriageway surfacing

Watch Robotics at work on a Cable Stay Bridge

In conjunction with IPC we brought this technology from the USA to the UK

Watch more videos of the HTA crew at work by clicking here


Bridge the Testing Gap with HTA

Take advantage of our Open Door Policy

Even if you do not end up using HTA we are happy to advise on the best course of action for the outcome you wish to achieve.

It is impossible for one company to carry out every project, however we can share our expertise far and wide.

Call: 01555 771 525 or Email: testing@hendersonthomas.co.uk