Format for node.dat
===================

SerialNumber x-coordinate y-coordinate

Include as many lines as above as the number of nodes you have. 
Serial number is the number of the nodes.

Format for elem.dat
===================

SerialNumber Node1 Node2 beam-width beam-depth YoungsModulus

Include as many lines as above as the number of elements.
Node1 and Node1 mean the number of the nodes that make the element.

Format for the forces.dat
=========================
SerialNumber Node# dof# Force/Moment_value

Include as many lines as above as the number of forces you want to apply.

Node# is the number of the node at which you want to apply force or moment.

dof# is 1 for x direction force, 2 for y-direction force, and 3 for moment 
about the z-axis.

If at a node more than one dof is to have force/moment, you need to include more than one
line.


Format for disp.dat
===================
SerialNumber Node# dof# Displacement/Slope_value

Include as many lines as above as the number of displacements you want to fix.

Node# is the number of the node at which you want to fix displacement or slope.

dof# is 1 for x direction displacement, 2 for y-direction displacement, and 3 for slope
(i.e., the rotation about the z-axis).

If at a node more than one dof is to be fixed, you need to include more than one
lines.

The displacement/slope value can be zero or non-zero.