Accropodes are designed to absorb wave energy through voids created by the interlocking structures they create when in position.
'They are placed using accurate and systematic methods beginning at the toe of the revetment, where concrete piles in the foreshore secure the first row, and then in interlocking rows up to the top of the armouring, ' said Scarborough Borough head of engineering John Riby.
The first three rows of Accropodes were placed accurately to Sogreah's plans, Riby told NCE. The rest were placed randomly but interlock to form a tightly integrated revetment.
Removal of the damaged Accropodes near the toe cannot be done without moving the units above it. This could take several months.