Bridge Investigations

HTA Bridge Investigations

HTA Blend the latest Tech with Traditional Techniques

The leading experts in the investigation of Post Tensioned Bridges and the only company in the UK to robotically test a major cable stay rail bridge.

Investigating, inspecting and testing has been the backbone of HTA as a company for over 30 years.

Maximise projects & minimise problems with HTA as the Principal Contractor alongside provisional reports within 24 hours 

HTA - Bridge Investigations

HTA carry out Bridge Investigations on the following


Network Rail

London Underground

Transport for London ‘TFL’


Environment Agency

Privately Owned

English Heritage

HTA bridge projects include

This list is not exhaustive, however it gives a good idea of the range of bridge services undertaken.


‘Investigations – accurately determine the health and or construction of the bridge

PTSI Investigations

Post Tensioned Special Inspections ‘PTSI’ Void Detection – using ultrasonic testing to determine the potential voidage within tendon ducts

‘PTSI’ – using innovative technology to determine the condition of the post tensioned elements to the bridge

Bridge Testing

Testing – accurately determining the condition of various bridge construction types and materials including

HAC Investigations

HAC (beam) Bridge Investigations – determining the presence and condition of HAC elements

Bridge Inspections

Inspections – working to Highways England & Transport for London specifications

Discover more for where you are located

The following links will take you to our country dedicated websites

England & NI websites
Structural Investigations | Building Investigations

Wales websites
Structural Investigations | Building Investigations

Scotland websites 
Structural Investigations | Building Investigations

Republic of Ireland websites
Structural Investigations | Building Investigations

Warren Thomas

Written by 

Director of Henderson Thomas Associates Limited (HTA) I welcome you to connect with me and ask any questions about HTA and those we have worked alongside and completed projects for. I have been working in the testing and inspection division covering civil engineering sector for over 30 years and have run some of the largest Materials and Testing Laboratories in the UK prior to forming Henderson Thomas Associates Limited