Gobi (Erco) and Jumbo Blocks and Mats
Wave Height Ranqe: Below five feet (blocks).
Above five feet (mats).
Runup Characteristics: Smooth.
Gobi blocks are patented units that weigh about 13 pounds each. Erco blocks are similar but they
are offered by a different licensed manufacturer. Jumbo blocks are large Erco blocks that weigh about
105 pounds each. All of these blocks are designed for hand-placement on a filter cloth or they are
factory-glued to carrier strips of filter cloth. The latter are called Gobimats (Ercomats), or Jumbo
Ercomats, depending on the size of the units. They all require machine placement. If the blocks are
glued back to-back to both sides of the carrier strip, they are called double Gobimats (Ercomats) or
double Jumbo Ercomats. Mats are preferred at sites where vandalism or theft is possible.
Gobi block and Gobimat revetments have both performed well. A large project on the Gulf of
Mexico has weathered several hurricanes and tropical storms with only moderate damage to the block
sections and little or no damage to the mat portions.
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