import rhinoscriptsyntax as rs 
allobgjs = rs.AllObjects

#draw a closed curve in rhino
rs.Command("_Curve Degree2 0,0,0 120,0,0 120,50,0 30,80,0 120,100,0 130,130,0 40,150,0 0,110,0 10,80,0 70,50,0 0,20,0 Close _Enter")
crv = rs.FirstObject(select=True)

#extrude the curve
rs.Command("_ExtrudeCrv Solid=No 300 _Enter")
srf = rs.FirstObject(select=True)

#create contourlines in z-direction and extrude them (floor plates)
rs.Command("Contour 0,0,0 0,0,1 30 _Enter")
rs.Command("_ExtrudeCrv Solid=Yes 3 _Enter")

#create contourlines in x-direction and extrude them (vertical support)
rs.SelectObject(srf)
rs.Command("Contour 0,0,0 1,0,0 2 _Enter")
rs.Command("Pipe 0.2 _Enter")