![]() SRWs must be properly designed and installed. The units may also be used in combination with horizontal layers of soil reinforcement that extend into the backfill to increase the effective width and weight of the gravity mass. The durable and long-lasting system consists of manufactured modular concrete units (typically dry-cast, machine-produced concrete) placed without mortar (dry stacked), which rely on a combination of mechanical interlock, unit to unit interface friction, or shear capacity and mass to prevent overturning and sliding. SRWs function as gravity structures by relying on self-weight to resist the external destabilizing forces of retained soil (backfill) and surcharge loads. Like any other system to function as planned, SRWs must be properly designed and installed. ![]() ![]() Applications include landscaping walls, structural walls for changes in grade, bridge abutments, stream channelization, waterfront structures, tunnel access walls, wing walls, and parking area supports. Segmental retaining walls have many advantages, including design flexibility, aesthetics, economics, ease of installation, structural performance, and durability. The general landscape market will continue to grow about 6% annually over the next four years, according to the National Concrete Masonry Association (NCMA) and Freedonia market research. The SRW and paver markets have grown 3% annually. ![]() The popularity of segmental retaining walls (SRWs) has exploded over the past 15 years.
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