# Getting Started with OpenSees -- Summary of Model-Building Input File

The following is a compilation of all the commands necessary to build the model:

```Tcl model basic -ndm 2 -ndf 3

  1. nodal coordinates:

node 1 0 0 node 2 504 0 node 3 0 432 node 4 504 432

  1. bondary conditions:

fix 1 1 1 1 fix 2 1 1 1 fix 3 0 0 0 fix 4 0 0 0

  1. nodal masses:

mass 3 5.18 0. 0. mass 4 5.18 0. 0.

  1. transformation:

geomTransf Linear 1

  1. element connectivity:

element elasticBeamColumn 1 1 3 3600 4227 1080000 1 element elasticBeamColumn 2 2 4 3600 4227 1080000 1 element elasticBeamColumn 3 3 4 5760 4227 4423680 1

  1. recorders

recorder Node -file Node3.out -time -node 3 -dof 1 2 disp recorder Element -file Element1.out -time -ele 1 force ```

The above commands can be input line by line at the OpenSees command prompt:

RunExample.jpg

Otherwise, they can be saved into an input file called example.tcl. This file can then be sourced in from the OpenSees command line:

RunSourceExample.jpg

Return to Getting Started with OpenSees