Structural Engineering Calculation Software

Rigid Diaphragm Torsion

Module Summary

  • Analyzes a rigid diaphragm to determine the distribution of loads to resisting elements
  • Incorporates user-specified diaphragm force and two options for specifying optional orthogonal force
  • Considers user-specified point of application of diaphragm force
  • Automatically incorporates accidental torsion due to minimum eccentricity as required by ASCE 7
  • Creates a load application point at a user-specified number of locations around an ellipse defined by the eccentricities along the two axes of the diaphragm
  • Applies the vector sum of the primary and orthogonal force components in a user-specified number of directions at each load application point, or varies the load in an elliptical pattern between two specified magnitudes that occur at 90 degrees to each other
  • Convenient input tools facilitate the data entry for up to 160 resisting elements of walls, beams, or general resisting elements of specified stiffness
  • Offers the convenience of fill-in-the-blanks style forms and instantaneous recalculation to facilitate the evaluation of “what-if” scenarios
  • Provides highly efficient results summaries as well as generous detail in the on-screen and printed results

Working view of the Rigid Diaphragm Torsion module

Consistent with all ENERCALC modules, inputs are on the left, while graphics and numerical results are displayed on the right.