: Ideally, for a regular structure, the center of mass should coincide with the center of geometry. Significant deviations may indicate a potential torsion problem.
: It reveals if elements meshed between stories are lumping mass to the wrong level. etabs mass summary by story better
Story Mass (UTotal) = Σ(Dead load + applicable live load) / g : Ideally, for a regular structure, the center
Architects often provide cladding as a line load. Ensure these are applied to the perimeter beams and that the mass source is set to include "Specified Load Patterns." Story Mass (UTotal) = Σ(Dead load + applicable
Engineers often apply live load reduction factors (for gravity design) to the mass source. For seismic mass, use unreduced live loads multiplied by the code factor (e.g., 0.25). Never apply area reduction to mass.
: Output values often require conversion; for example, dividing by 1,000 to match specific project units (e.g., from kg to Tonnes). Meshing Warning