The most critical variable in potential failure of an ACB system is block protrusion (when one block sticks up relative to another in the direction of flow). Enviroflex® eliminates block protrusion with a vertically overlapping edge that locks the blocks together. Enviroflex® is also tapered at the block interface and holes to eliminate any sharp edges. Most other horizontally interlocking blocks, especially when installed in large mats, have significant gaps between blocks that result in no interlock and the blocks are free to move up and down relative to each other. Even a tightly spaced horizontally interlocking block has the ability to move up and down relative to other blocks.
No. All systems are flume tested without the use of cables or connection devices. Enviroflex® does not need to have all the blocks cabled together because the vertical interlock eliminates the ability to remove one block from a matrix. Enviroflex® is a palletized product that is either placed with a grappling machine or by hand. In other systems, cables are mostly used for installation of large mats and to keep the blocks together due to lack of interlock. In case of terminal ends or sections butting up to existing or proposed structures, Enviroflex® is cast with holes to allow for cables or pins to tie off into a closure pour of concrete.
Generally, an experienced, licensed general engineering contractor can easily install Enviroflex®. Further, a contractor with experience in fine grading and construction of revetment systems is best suited.