*HEADING
 BARREL VAULT  (18 X 18 STRI3)        
*PREPRINT,ECHO=YES,MODEL=NO,HISTORY=NO
*NODE,SYSTEM=C,NSET=CORNER
1,300.,0.,0.
19,300.,,300.
361,300.,40.,
379,300.,40.,300.
*NGEN,LINE=C,NSET=WALL
1,361,20
*NGEN,LINE=C,NSET=SYMM
19,379,20,,,,300.
*NFILL
WALL,SYMM,18,1
*NGEN,NSET=APEX
1,19
*ELEMENT,TYPE=STRI3
1,1,2,22
2,1,22,21
*ELGEN,ELSET=ROOF
1,18,1,2,18,20,36
2,18,1,2,18,20,36
*MATERIAL ,NAME=METAL
*ELASTIC
3.E6, 
*BOUNDARY
APEX,YSYMM
SYMM,ZSYMM
WALL,1,2
*SHELL SECTION ,MATERIAL=METAL,ELSET=ROOF
3.,3
*STEP
 SELF-WEIGHT
*STATIC
*DLOAD
ROOF,BX,-0.20833
*ENERGY PRINT
*EL PRINT,FREQUENCY=0
*NODE FILE,NSET=CORNER
U, 
RF, 
*ENERGY FILE
*END STEP