*HEADING
 ROOF SNAP THROUGH [SC8R]
*RESTART,WRITE
*NODE
*NGEN,LINE=C ,NSET=EDGE
*NGEN,LINE=C ,NSET=EDGE
*NGEN,LINE=C,NSET=ZSYMM
*NGEN,LINE=C,NSET=ZSYMM
*NFILL
 EDGE,ZSYMM,6,10
*NGEN,NSET=YSYMM
*NGEN,NSET=HINGE_A
*NGEN,NSET=HINGE_B
*NSET,NSET=N61
*ELEMENT, TYPE=SC8R, ELSET=SHELL
*ELGEN,ELSET=SHELL
*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
 HINGE_A, 1, 1.0, HINGE_B, 1, 1.0
 HINGE_A, 2, 1.0, HINGE_B, 2, 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