![]() ![]() ![]() NCMA is limited to geosynthetic reinforced segmental retaining walls (SRW). Hence, the two programs MSEW+ and ReSSA+ complement each other.ĪASHTO98/02 and NCMA are based on allowable stress design ( ASD) whereas AASHTO 20 are based on load and resistance factors design ( LRFD). This LE has been implemented in program ReSSA+. Its unique feature is its ability to rationally deal with internal stability. Note: An alternative method for designing geosynthetic walls allowed in AASHTO 2020 is based on limit equilibrium (LE). ![]() AASHTO 2020 – Simplified Stiffness Method for geosynthetics which can be used instead of the Simplified AASHTO.Simplified AASHTO Method for geosynthetics and metallic reinforcement as well as an option for using Coherent Gravity Method for metallic. FHWA-NHI-10-024 (as related to traffic barrier load and some of the bridge abutment methodology).MSEW+ is an interactive program for the design and analysis of mechanically stabilized earth walls.
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