Rope, sheet rope and twine are different items
Build 42 has three cord items, and recipes treat them differently. Rope is the heavy binding cord, weighing 0.8. Sheet Rope is a knotted bed sheet that also weighs 0.8 and counts as rope in most building recipes. Twine is a light drainable spool, 0.5 when full with 5 uses (one source), and it is used mainly for traps, fishing gear and small bindings.
Twine does not turn into rope. No recipe in our sources combines twine spools into a rope, so plan on making rope from fiber or finding it. Many outdoor builds accept any of the three, plus ripped sheets, so check the ingredient list before you spend your best rope.
A bundled form, the Rope Bundle, weighs 8.0 and can be split back into single ropes (one source). It is a rare find on tool and rigging loot tables.
