8081 HEAVY WEIGHT DEFLECTOMETER (HWD)
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8081 HEAVY WEIGHT DEFLECTOMETER (HWD) Dynatest, the original commercial developer of the Falling Weight Deflectometer (FWD) technology and the world’s largest supplier of FWD deflection based equipment has designed the Heavy Weight Deflectometer (HWD) with much higher loading capability to meet the needs of airports and pavement agencies with extra thick, stiff pavement structures. Dynatest HWD can easily simulate and measure the load levels and response of large aircraft such as the Boeing 747/777 and the Airbus A380. The HWD can produce higher and wider range of load levels suitable to both the highway and airfield applications. of rubber buffers on a bracket connected to a circular load plate. A load cell mounted on top of the plate measures the imparted load. Deflection sensors (geophones) mounted radially in and from the center of the load plate measure the deformation of the pavement in response to the load. The post processing software, Dynatest ELMOD (Evaluation of layer Moduli and Overlay Design) can be used to back-calculate the pavement layer moduli based on the impact load and surface deflection basin. The results can effectively be used for the evaluation of pavement structural condition and overlay design based on empirical or mechanistic- empirical pavement design guides. Similar to the FWD, the HWD is designed to impart a load pulse to the pavement surface simulating the load produced by a rolling vehicle wheel. The load is produced by dropping a large weight on a set The HWD data can also be used to calculate the degree of load transfer between adjacent concrete slabs, and to detect voids under slabs in rigid pavements.

■ AVAILABLE UPGRADE OPTIONS Nondestructive structural testing device Folding trailer for ease of shipment Ideal for comprehensive testing for mechanistic-empirical analysis and design Global Positioning System (GPS) Very wide loading range—6,750–72,000 lbf (30–320 kN); suitable for testing a variety of paved and unpaved roadways, parking lots and airfield surfaces Camera system for plate location or Right of Way Imaging Allowing for simulation of new large aircraft such as A-380 and B-777 Towing vehicle Excellent repeatability Rear or rear and transverse sensor extension bars Single person...