> For the complete documentation index, see [llms.txt](https://docs.openbrim.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openbrim.org/developers/paramml-developer-guide/core-objects/finite-elements-objects/fesurface.md).
# FESurface
The "FESurface" Object is a component of the finite element model that represents foundations or slabs. It requires at least three different "Node" Objects and a Material object, and the thickness must also be specified using the Thickness parameter.
**Example Syntax:**
```
...
...
...
```
**Example:**
```xml
```
 In the above example, 8 "FENode", 4 "FELine", material class and finally "FESurface" were defined. To view this example in the library, see ()
**Parameters of FESurface Object:**
\| | **Label** | **Mandatory** | **Name and Type Attributes** | **Default Description and Value Attributes** | **Other Attributes** | | --- | --- | --- | --- | --- | | 1 | Node 1 | Yes | N="Node1" T="Node" | D="Node 1: The first node of the finite element." V="" | Role="Input" | | 2 | Node 2 | Yes | N="Node2" T="Node" | D="Node 2: The second node of the finite element." V="" | Role="Input" | | 3 | Node 3 | Yes | N="Node3" T="Node" | D="Node 3: The third node of the finite element." V="" | Role="Input" | | 4 | Node 4 | Yes | N="Node4" T="Node" | D="Node 4: The fourth node of the finite element." V="" | Role="Input" | | 5 | Thickness | Yes | N="Thickness" | D="Thickness: The thickness of the surface." V="0" | Role="Input" | | 6 | Material | Yes | N="Material" T="Material" | D="Material: The material property of the finite element." V="" | Role="Input" |
---
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