CREATE WALLS THAT FOLLOW SITE TOPOGRAPHY

Even though a wall’s profile is used in this example, this principle could be applied to a number of other elements including, curbs, pipes, etc..

Add a building pad where the edge is at the centerline of wall shown in the Figure below. Make sure that the building pad is lower in elevation than the site topography.

Note that:

• • No elements will “join” with the site topography so a modified “intersection” method will have to be used.

  • A building pad “cuts” a site topography element and therefore a building pad will be used as the “sacrificial” element.

  • A new site topography element that just contains the boundary of the cut made from the building pad is created. It is this phenomenon that we will take advantage of.

Select the “new topography” element that contains the boundary and export it as a Dwg and save as a new name.

Add an in-place mass and insert the newly exported Dwg as origin to origin level 1, orient to view. This will place the new site topography element as a DWG and will allow its edge to be “pickable”.

Add a wall by picking the edge of original building pad and extend the top limits to any desired height. In the case shown in figure below, it is shown stepped.

Edit the wall profile and pick the edge of the inserted Dwg/in place mass and trim the edges as shown in Figure 3 below.

Site Wall following contours of site topography:

Cut in site topography and new site topography element:

Wall profile and pickable lines: