*HEADING
 BARREL VAULT  ( 4 X 4 MESH , S4R5 )
*PREPRINT,ECHO=YES,MODEL=NO,HISTORY=NO
*NODE,SYSTEM=C,NSET=CORNER
*NGEN,LINE=C,NSET=WALL
*NGEN,LINE=C,NSET=SYMM
*NFILL
WALL,SYMM,4,2
*NGEN,NSET=APEX
*ELEMENT,TYPE=S4R5,ELSET=ROOF1
*ELGEN,ELSET=ROOF
*ELSET,ELSET=FEW
*MATERIAL,NAME=STEEL
*ELASTIC
 3.E6,
*BOUNDARY
 APEX,YSYMM
 SYMM,ZSYMM
 WALL,1,2
*SHELL SECTION,ELSET=ROOF ,MATERIAL=STEEL
 3.0,3
*STEP
 SELF-WEIGHT
*STATIC
*DLOAD
 ROOF,BX,-0.20833
*EL FILE,ELSET=ROOF1
S,
*NODE FILE,NSET=CORNER
U,
RF,
*EL PRINT,ELSET=ROOF
*END STEP