MASS User Documentation

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Multi-Storey Design

Bug Notification

Notification: Seismic Shear Forces Amplification Change for Elements Above Critical Section

The storey-by-storey design approach currently in MASS can excessively amplify shear forces beyond expected results   In cases where a bug or other issue is found in the MASS software, announcements are posted on the software’s known bugs page, as well as on this page here. It is always encouraged Read more…

By Brad Crumb, 1 year1 year ago
Technical

Slab Assumptions in Multi-Storey Shear Wall Design

MASS does not design floor slab systems but allows for them to be modeled within Multi-Storey Shear Walls for the software to design the masonry supporting and spanning between them.    Slabs are basically rectangles on the cross section that appear between designed shear wall elements. It is assumed that Read more…

By Brad Crumb, 2 years2 years ago
Technical

Understanding the Minimum Boundary Element Length Limits on Strain

While not explicitly listed as a strain limit, the minimum boundary element size can have a large effect on how high maximum compressive strain can be increased.   As part of the process of addressing a shear wall design with inadequate ductility, MASS will increase the maximum compressive strain, εmu Read more…

By Brad Crumb, 3 years2 years ago
Recent Posts
  • Change Notification: Lambda Values for Beam Density and Shear
  • Bug Notification: Drift Values instead of Elastic Deflections used for Inelastic Rotational Demand
  • Bug Notification: Seismic reinforcement spacings applied to all shear walls resisting an earthquake load
  • Notification: Seismic Shear Forces Amplification Change for Elements Above Critical Section
  • Bug Notification: Non-Seismic Lateral Companion Loads Amplified for Seismic Effects
  • Version 4.0 Feature Spotlight: Ductility Verification
  • Version 4.0 Feature Spotlight: Simplified National Building Code Seismic Design
  • Bug Notification: Out-of-Plane Shear Resistance checked only at location of maximum shear
  • Known Bugs in MASS
  • MASS Version 4.0 is now available – adds multi-storey design and more earthquake design options
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