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u need to study about mesh convergence from any FEA book! it's an art! for usual geometries and normal problems, default values of 1.0 in etabs or safe are okay! but mesh should not affect reactions. it affects strains, displacements, stresses but the reactions in columns which are 1d elements should not be affected. i mean the equilibrium is satisfied!1 point
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mesh size of? reinforcement or finite element mesh?1 point
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