Due to the limitations of fabric widths, shades larger than noted fabric widths may have to be railroaded or seamed. When fabric is railroaded the width of the fabric is turned and now becomes the length. If the length required is longer than the width of the fabric, the fabric will be seamed at the top.
The pattern runs horizontally rather than up the roll.
Describes fabric that runs horizontally along the width of a piece of furniture and from front to back along the arms.
Railroaded refers to a fabric with a pattern that runs horizontally rather than up the roll.