# Tips for Parametrization

### Tips & Tricks

001052

23 June 2015

For recurring elements such as certain structural components or standard parts, it is possible to use the parameterization of a basic model. In the program, the main elements do not represent components but the corresponding node and therefore, they have to be parameterized. For example, a member is not defined by the length, but by the start and end nodes. In this way of modeling, complex formulas may occur especially in the case of three-dimensional structures.

Here are some tips for an efficient and successful parameter model:

1. In order to avoid parametrization of intermediate nodes on lines, you can use the ‘Node on Line’ type. If partial lines between ‘nodes on line’ are required, you can additionally create lines on the line.
2. In the case of circles or arcs consisting of three points, it is necessary to parametrize all nodes individually. You can avoid this by using the ‘Circle via Center and Radius’ type. It can be parameterized via the radius. If more segments on the circle are required, you can also use the ‘Node on Line’ type and thus create partial lines using the ‘Arc by Three Nodes’ type.
3. When using reference nodes, it is possible to move a whole point cloud via only one parameterized node. The points have to be entered solely as reference nodes of the desired node.
4. It is often useful to divide a large structure into individual elements to avoid parametrization of the entire structure. Then, the individual elements are saved as a block and the block parameters are adjusted during import. The advantage is that the parameters are lost after the import and therefore, you can modify the model only by deleting and reimporting the data.
5. Especially when creating many formulas that are the same due to large area, exporting to Excel (with the subsequent import to RFEM/RSTAB) can save a lot of time, because editing of the tables is even easier (formulas can be exported).