Last updated: 2010-03-16
Test report from Trondheim
from SINTEF Coast and Harbour Research Laboratory by Arne Erling Lothe
Summary
The tests show that the Grip has a proven ability to create a lee-zone in steady current, which will cause a break in the transport of bed load and near-bottom sediment flows. The reefs are expected to be efficient against local erosion. Structures that are located inside the lee-zone will experience a significant reduction in bottom shear stresses and consequently have less erosion around them.
Read more 
Norwegian