RAM Structural System Help

Add a Slab Edge

  1. Type the Slab overhang, (measured from the centerline of the beam when laying out slab edges along beams) in the Slab Overhang edit box. This must be greater than or equal to zero. When laying out free-form slab edges (edges that aren't directly laid out on beams), it is recommended (but not required) that you use zero.

Two methods are available to assign a slab edge to the layout.

Whole Perimeter

  1. To assign the Slab Edge around the entire perimeter of a level click on Whole Perimeter button. As long as there are beams that are continuous around the perimeter of the level then the slab edge will be assigned appropriately. If the floor type has discontinuous framing (multiple diaphragms) see item 2. The slab edge can then be modified as described Delete Slab Edge and using the technique described in the Add section below.
  2. If the floor type has discontinuous framing (multiple diaphragms) a message box will be displayed asking that a beam or wall from the desired diaphragm be selected. The target cursor will appear. Select a beam or wall from the desired diaphragm to assign the slab edge to the perimeter of the whole diaphragm. Other diaphragms can be selected for assignment without returning to the dialog.

Add

  1. To enter the Slab Edge such that it will be offset to the "outside" of the click points while moving in the clockwise direction select the Left option button. To enter the Slab Edge such that it will be offset to the "outside" of the click points while moving in the counter clockwise direction select the Right option button. Inside and outside are defined relative to the inside and outside of the structure.
    Note: A slab edge entered on the wrong side of a beam might cause erroneous results.
  2. Click Add. The dialog box will disappear and the RAM Modeler will enter the Add Slab Edge Layout Mode.
  3. Click on the point at which the slab edge assignment is to begin, move the mouse over a beam segment, a full beam, a line of beams, or empty space where the slab edge will be added, and click again. A thin line will appear offset from the layout line in the applied direction. If the offset occurs on the opposite side from where you want it, you can overwrite it by dragging the mouse in the opposite direction. An Add will overwrite slab edge assignments previously made on any beam segments that you lay out along. As an alternative to clicking on the beginning and end points, coordinates can be entered directly using the Keyboard Mode Coordinate Entry command.
  4. Additional Slab Edges with the same overhang can be entered by repeating the above step. To change overhangs and add more Slab Edges, click the right mouse button, enter the new Overhang, and repeat the above two steps.
  5. Always complete the slab edge at the same point that you start laying down your edge.
  6. If you use a combination of slab edges with non-zero overhangs and slab edges with zero overhangs, you must be careful about how you close up the loop. Specifically, the zero-overhang segment must be drawn to the origin point of the non-zero segment, not the actual slab location. The origin point is the point that the short right-angle offset lines are drawn to.