Skip to main content
Skip table of contents

Accidental Torsion

  • As required by Codes, the earthquake calculation is made automatically in every 4 cases by shifting the storey masses by 5%.

  • In accordance with Codes, the horizontal earthquake loads are calculated automatically by shifting (+) and (-) 5%.

  • In modeling accidental torsion, any of the static and dynamic methods that comply with the regulation can be used for analysis. Method selection is controlled by users.

International Design Codes

ASCE 7-16 : Accidental Torsion per ASCE 7-16 with ideCAD

TSC 2018 : Additional Eccentricity Modelling

Horizontal earthquake loads affecting the floor mass center or nodes is shifted by +5% and -5% of the floor dimension perpendicular to the earthquake direction considered, and earthquake calculation is also made for these cases.

Accidental torsion is a building-code requirement for both regular and irregular structures, since uneven distribution of live-load mass during lateral loading and variation between computed and actual values of structural properties.

JavaScript errors detected

Please note, these errors can depend on your browser setup.

If this problem persists, please contact our support.