jbaglieri When they run a fabric "sideways," so the width of the fabric is the top and bottom, and if you run it, say, along the back of a sofa, you don't have to seam it. Most drapery fabric is meant to run vertically (these stripes are printed to run vertically), but the designer had it run horizontally (railroaded) and seamed the widths together that way.
Bellagio Custom Drapery You can find fabric with these big horizontal stripes. This would be preferable to railroading as the way the fabric hangs over a period of time may be compromised with horizontal seams.