+prog aqua urs:1
head
norm din en199x-200x
conc 1 C 25
stee 2 B 500B

sect 1 mno 1 mrf 2 btyp beam
poly type opy
  vert  1    500     0
        2      0     0
        3      0   500
        4    500   500
lrf 11  50  450  450  450 as 1[cm2/m] lay 1 mrf 2 d 20 a 100. dist full
lrf 12  50  -450  450  -450 as 1[cm2/m] lay 1 mrf 2 d 20 a 100. dist full  refa "@3'"  rfda "@3'" refe "@2'"  rfde "@2'"
end