#1 Initiale:N 
import rhinoscriptsyntax as rs

allobjs = rs.AllObjects ()
rs.DeleteObjects (allobjs)
hgt = 24

# draw aclosed curve in rhino
rs.Command("_Curve Degree=2 0,0,0 0,30,0 10,30,0 20,10,0 20,30,0 30,30,0 30,0,0 20,0,0 10,20,0 10,0,0 Close _Enter")
crv = rs.FirstObject (select=True)

# extrude the curve
rs.Command("ExtrudeCrv Solid=No {} _Enter".format(hgt))

srf = rs.FirstObject (select=True)

# use handles to change NURBS shape

# create contourlines in Z-direction and extrude them (floor plates)
rs.Command ("Contour 0,0,0 0,0,1 3.0 _Enter")
rs.Command ("_ExtrudeCrv Solid=Yes 0.3 _Enter")

# create contourlines in X-direction and use the pipe command (vertical support)
rs.SelectObject(srf)
rs.Command ("Contour 0,0,0 1,0,0 2.0 _Enter")
rs.Command ("Pipe 0.2 _Enter")

rs.DeleteObject (srf)