3.1 Drawing Bounds and Units
- The drawing bounds define the area where you can draw lines, piezometric surfaces and specified surfaces, ranges, point loads, and surcharges.
- Note: Search grids can be drawn outside the drawing bounds.
- To set the drawing bounds, select from the tool palette, or select Define Drawing Bounds under the Drawing Menu.
- You will be presented with four blue markers representing the current drawing bounds.
- Click a marker to edit the drawing boundary with text input.
- Drag a marker to graphically move the drawing boundary. If snap-to-grid is enabled, it will snap to the currently displayed grid lines.
- MacSlope allows the units of length, force, and stress for a drawing to be specified in either Metric (SI) or Imperial (British).
- Note: All material properties and surcharge loads must be specified with units consistent with the selected units for the drawing.
- Note: Changing the drawing units does not automatically convert any of the length, force, or stress values currently specified in the drawing. For this reason, it is a good idea to define the drawing bounds and units before drawing the slope geometry and creating materials, although they can be changed later if necessary.
- To set the drawing units, select from the right toolbar buttons, or select Set Drawing Units under the Drawing Menu..
- The standard units of length, force, and stress used in MacSlope are the following:
Unit Weight: (kN/m3)
Unit Weight: (lbf/ft3)
Unit Weight of Water
- To set the unit weight of water, select from the right toolbar buttons, or by selecting Set Drawing Units from the Drawing Menu.
- When changing units from Metric to Imperial or vice-versa, you will need to update the unit weight of water accordingly, generally to the default values listed below.
- MacSlope uses the unit weight of water to calculate pore pressures from piezometric surfaces, and to calculate forces generated from water-filled tension cracks. You should only change the unit weight of water from the default values if you are modeling fluids other than water.
- The default values for the unit weight of water are:
Unit Weight of Water: 9.81 kN/m3
Unit Weight of Water: 62.4 lbf/ft3