public bool FillBottomBars()
{
// get the geometry information of the bottom rebar
RebarGeometry geomInfo = m_geometry.GetBottomRebar();
// create the rebar
Rebar rebar = PlaceRebars(m_bottomType, null, null, geomInfo,
RebarHookOrientation.Left, RebarHookOrientation.Left);
return (null != rebar);
}