*HEADING
: I GENERAL SECTION  [B31OS]
EXTRA NODES ARE USED TO DEFINE THE BEAM SECTION ORIENTATION
*NODE
 1,  0.0, 0.0
11, 75., 0.0
101,  0.0, 0.0,-1.
111, 75., 0.0,-1.
*NGEN,NSET=ALL
 1,11,2
 101,111,2
*ELEMENT,TYPE=B31OS, ELSET=EALL
1,1,3,101
2,3,5,105
3,5,7,107
4,7,9,107
5,9,11,111
*ELSET, ELSET=FOUR
4, 
*BEAM GENERAL SECTION,SECTION=I, ELSET=EALL
1.0428572, 2.4, 3., 2., .2, .2, .2
0., 1., 1.
3.E6, 1.1538E6, .001
*BOUNDARY
1, 1, 7
*STEP,PERTURBATION
*STATIC
*CLOAD
11,2,25.
*EL PRINT
SF,
*NODE PRINT
 U1,U2,U3,COORD
 UR1,UR2,UR3,WARP,COORD
*END STEP
*STEP,PERTURBATION
*STATIC
*CLOAD
11,4,25.
*END STEP