*HEADING
 ROOF SNAP THROUGH [SC8R]
*RESTART,WRITE
*NODE
   1,2.5431750, 0.,           0.
   7,2.5304856,  .2535769,    0.
  61,2.5431750, 0.,            .254
  67,2.5304856,  .2535769,    0.254
 101,2.5368250, 0.,           0., 
 107,2.5241356,  .2535769,    0., 
 161,2.5368250, 0.,            .254
 167,2.5241356,  .2535769,    0.254
*NGEN,LINE=C ,NSET=EDGE
 1,7,1,0,0.,0.,0.
*NGEN,LINE=C ,NSET=EDGE
 101,107,1,0,0.,0.,0.
*NGEN,LINE=C,NSET=ZSYMM
 61,67,1,0,0.,0.,.257175
*NGEN,LINE=C,NSET=ZSYMM
 161,167,1,0,0.,0.,.250825
*NFILL
 EDGE,ZSYMM,6,10
*NGEN,NSET=YSYMM
 1,61,10
 101,161,10
*NGEN,NSET=HINGE_A
 7,67,10
*NGEN,NSET=HINGE_B
 107,167,10
*NSET,NSET=N61
 61, 
*ELEMENT, TYPE=SC8R, ELSET=SHELL
 1, 101, 102, 112, 111, 1, 2, 12, 11
*ELGEN,ELSET=SHELL
 1, 6, 1, 1, 6, 10, 10
*SHELL SECTION, ELSET=SHELL, MATERIAL=ELASTIC,POISSON=ELASTIC
 1.0,
*MATERIAL, NAME=ELASTIC
*ELASTIC
 3.103E9,.3
*BOUNDARY
 ZSYMM,3,3
 YSYMM,2,2
 HINGE_A,3,3
 HINGE_B,3,3
*EQUATION
 2,
 HINGE_A, 1, 1.0, HINGE_B, 1, 1.0
 2,
 HINGE_A, 2, 1.0, HINGE_B, 2, 1.0
 2,
 61, 1, 1.0, 161, 1, -1.0
*STEP,NLGEOM,INC=50
*STATIC,RIKS
 2.E-2,1.,0.,2.E-2,.06
*CLOAD
 61,1,-3000.
*MONITOR,NODE=61,DOF=1
*NODE PRINT,FREQUENCY=2
 U, 
 RF, 
*OUTPUT, HISTORY
*NODE OUTPUT, NSET=N61
 CF, U
*NODE FILE,NSET=N61
 U,CF
*OUTPUT,FIELD
*NODE OUTPUT
 U,CF
*EL PRINT,FREQUENCY=2
 SF,
 SSAVG,
*END STEP