Create the shape curve, then loft it. Now you will have solid sides but holes in the top and bottom. Just choose the top and bottom isoparms and Surface>Planar
Darkon
Red bellows of flame have blackened my stones
Convulsing my frame and cracking my bones
Hell's dragons of steel who roar in their chains
Crawl into my caves to suck out my veins.....
-The Mountain P.F.M.