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Is the mass correct? Did the software double-count the dead load? Why is the seismic weight different from the gravity takeoff? And most importantly— how can you get a better, more reliable Mass Summary?
: Briefly describe the structure, including the number of stories, heights, and general building type.
Seismic forces are calculated based on mass. If your story mass is off, your base shear and lateral forces will be incorrect. This table allows you to: Verify the self-weight of slabs, beams, and columns.
A better approach involves two distinct definitions:
This pyramid represents your building. The "Mass Summary by Story" table is simply the medical chart for every person in that pyramid.
: The base level often includes half the mass of the lowest columns/walls. While this mass appears in the report and total reaction ( cap F sub z
Is the mass correct? Did the software double-count the dead load? Why is the seismic weight different from the gravity takeoff? And most importantly— how can you get a better, more reliable Mass Summary?
: Briefly describe the structure, including the number of stories, heights, and general building type.
Seismic forces are calculated based on mass. If your story mass is off, your base shear and lateral forces will be incorrect. This table allows you to: Verify the self-weight of slabs, beams, and columns.
A better approach involves two distinct definitions:
This pyramid represents your building. The "Mass Summary by Story" table is simply the medical chart for every person in that pyramid.
: The base level often includes half the mass of the lowest columns/walls. While this mass appears in the report and total reaction ( cap F sub z
