- Products
- AXILOG II vibration monitoring system
- BGCMAP rate of corrosion tester
- Dynasen shock pressure sensor products
- Foundation integrity testing products
- Foundation load testing products
- PARAS parallel seismic test system
- PLATEMAN plate load tester
- SB2010 large scale shear box
- SCXT3000 cross hole sonic logging system
- Signal Lever Force Indicator (SLFI)
- SPTMAN hammer energy tester
- TDR2-S concrete slab tester
- Measurement and control
- Monitoring
- Smart Asset Management System™
- Bridge monitoring
- Building monitoring
- Rail monitoring
- Tunnel monitoring
- Wind turbine monitoring
- Request a demonstration
- Bridge crack monitoring
- Bridge strike monitoring
- Bridge deflection and displacement
- Bridge load testing
- Hidden bridge defect detection
- Over-height vehicle detection
- Scaffold and ladder testing
- Barrier and balustrade testing
- Commercial shelving and display unit testing
- Below ground corrosion assessment
- Bi-directional static load testing
- Cross hole sonic logging
- Dynamic pile testing
- Parallel seismic testing
- Pile integrity testing
- Static load testing
- Bituminous materials testing
- Chemical testing
- Concrete material testing
- Plate load testing
- Pyrite investigation and testing
- Soils and aggregate testing
- Specialist testing
- Coring and pavement analysis
- Falling weight deflectometer
- Radar surveys
- Utility reinstatement testing
- Corrosion surveys
- In-situ concrete testing
- Structure condition surveys
- Wind farm noise assessment
- Bridge bearing condition services
Falling weight deflectometer
Falling Weight Deflectometer (FWD) surveys by JFTS provide a rapid and non-destructive assessment of ground surface condition.
FWD testing offers a cost effective and accurate assessment on the structural condition of highways, flexible hard standings and airport runways. The FWD applies a dynamic load to a pavement that simulates the loading from a wheel of a moving vehicle and the surface performance is measured and logged.
We perate one of the few heavy weight deflectometers in the UK, with a Grontmij / Carl Bro PRIMAX2500 HWD trailer mounted system. Capable of applying loads in the range of 7-250kN, our system is well placed to evaluate the structural behaviour of airport runways and taxiways that are subject to extremely heavy loads on a daily basis.
FWD layer stiffness surveys are used for the following purposes:
- To assess the relative contribution to pavement strength of bound and unbound materials
- To indicate with sufficient accuracy and weak areas that need replacing or may require further consideration
- To check the severity of cracks in hydraulically bound mixtures
- To assess the equivalent surface foundation modulus prior to the design of concrete overlay
- To determine the effective stiffness modulus of sawcut, cracked and seated concrete pavements
