In weaving, this refers to the configuration of cords or chains linking the foot pedals (treadles) to the shafts (harnesses). By pressing one treadle, the weaver raises or lowers a specific combination of shafts to create the shed. The tie-up dictates the structural pattern of the woven cloth, working in tandem with the threading and treadling sequence.
Heard on the job
I need to crawl under the loom and change the tie-up for a broken twill draft.
Insider tip
Always double-check your tie-up draft before throwing the first pick, as one misplaced cord will ruin the entire pattern structure.