Lash-line hardware is an ancient (dating to at least the 1920s) form of temporarily joining flatwork when a scene must be set-up and struck quickly. A lash-line is typically 1/4" Cotton sash cord, attached to the top stile of the left flat via a lash line eye. Older methods had the lashline tied through a hole drilled in the corner block. The lashline then zig-zags around alternating lashline cleats, spaced about 3' apart. The bottom pair of cleats are ~3' above the deck, and nearly aligned horizontally. http://www.ia470.com/primer/scenery.htm Lashing Cleats / Lashing Hardware / Theatrical & Set Hardware / Home - Mutual Hardware Round Line Cleat / Lashing Hardware / Theatrical & Set Hardware / Home - Mutual Hardware Offset Round Line Cleat / Lashing Hardware / Theatrical & Set Hardware / Home - Mutual Hardware From http://www.ia470.com/primer/scenery.htm: At the bottom set of lash cleats the line is tied off with a quick release knot.