RAM Concept Help

Define the ultimate seismic east loading

  1. Choose Layers > Loadings > Ultimate Seismic East Loading > All Loads Plan.
  2. Choose View > Visible Objects ().
  3. Click the Drawing Import tab.
  4. Click Show All, and then click OK.
  5. Turn on Snap to Intersection ().
  6. Double click the Line Load tool () and in the Default Line Load Properties dialog box:
    1. Set the elevation above the slab surface to 360 inches [9000 mm].
    2. Set Fx to 4.1 kip/ft [60 kN/m].
    3. Set all other items in the dialog box to 0.
    4. Click OK.
  7. Draw a line load by snapping to the wall intersection points, as shown in the following two figures.

    East Seismic: All Loads Plan

    East Seismic: All Loads Plan [METRIC]

  8. Double click the Line Load tool () and in the Default Line Load Properties dialog box:
    1. Set Fy to -12.8 kip/ft [-174 kN/m].
    2. Click OK.
  9. Draw a line load by snapping to the wall intersection points, as shown in the following two figures.
  10. Double click the Line Load tool () and in the Default Line Load Properties dialog box:
    1. Set Fy to (+)12.8 kip/ft [(+)174 kN/m].
    2. Click OK.
  11. Draw a line load by snapping to the wall intersection points, as shown in the following two figures.

East Seismic: All Loads Plan (second set)

East Seismic: All Loads Plan (second set) [METRIC]

Note: The seismic loads are approximations for a five-storey building. The load elevation is the average floor height (third storey).
Note: The loads in the y-direction cancel the couple about the mat centroid.
Parent topic: Define the loads