*HEADING
: ARBITRARY SECTION (CHANNEL-ORIGIN AT SHEAR CENTER)  [B31OS]
*NODE
 1,  0.0, 0.0
11, 75., 0.0
*NGEN,NSET=ALL
 1,11,2
*ELEMENT,TYPE=B31OS, ELSET=EALL
1,1,3
2,3,5
3,5,7
4,7,9
5,9,11
*ELSET, ELSET=FOUR
4, 
*BEAM SECTION,SECTION=ARBITRARY, TEMPERATURE=VALUES,MATERIAL=A1, ELSET=EALL
3, 2.788787, -1.9, .838787, -1.9, .2
.838787, 1.9, .1
2.788787, 1.9, .2
0., 0., -1.
*MATERIAL,NAME=A1
*ELASTIC
 3.E6, 0.3
*STEP,PERTURBATION
*STATIC
*LOAD CASE,NAME=CASE-1
*BOUNDARY,OP=NEW
1, 1, 7
*CLOAD,OP=NEW
11,2,25.
*END LOAD CASE
*LOAD CASE,NAME=CASE-2
*BOUNDARY,OP=NEW
1, 1, 7
*CLOAD,OP=NEW
11,4,25.
*END LOAD CASE
**
**This step added for open section beam elements.  It consists of an axial
**load of 250.  The value UR1 at all nodes should equal zero.
**
*LOAD CASE,NAME=CASE-3
*CLOAD,OP=NEW
11,1,250.
*BOUNDARY,OP=NEW
 1,1,7
 ALL,5,6
*END LOAD CASE
*EL PRINT
 SF,
*NODE PRINT
 U1,U2,U3,COORD
 UR1,UR2,UR3,WARP,COORD
*OUTPUT,FIELD
*NODE OUTPUT
U,
*ELEMENT OUTPUT
S,
*END STEP