MASS User Documentation

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Multi-Storey

Technical

Why doesn’t MASS consider Type 6 Structural Irregularities?

With MASS Version 4.0 moving into Multi-Storey Shear Wall design, why doesn’t the software check for something that seems squarely within its expanded scope?   Dating back a few years in the MASS development process, a lot of work was put into adding the capability for the software to check Read more…

By Brad Crumb, 2 years2 years ago
Technical

Bonus Post: What happens when you treat a Multi-Storey Design as an Element when Increasing Factored in-Plane Shear ?

Does changing the analysis method effect the final results?   The process shown here is how MASS internally performs the analysis because the design is all done at the element level. If you are interested in how Vf,seismic is determined having only the information for one element available, this page Read more…

By Brad Crumb, 2 years2 years ago
Software Tips

How MASS Aligns Vertical Bars in a Multi-Storey Shear Wall

The method used by MASS to get bars to align is fairly complicated but gets the job done.   One early point of feedback in the Version 4.0 development process is that most engineers will not want to deal with the detailing of bars terminating in one cell and starting Read more…

By Brad Crumb, 2 years1 year 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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