चतुरशीत्यङ्गुलो व्यामो रज्जुमानं खातपौरुषं च ॥ कZ_०२.२०.१७ ॥
caturaśītyaṅgulo vyāmo rajjumānaṃ khātapauruṣaṃ ca
vyāma は 84 aṅgula であり、縄尺(rajju-māna)で、また「掘削人」(khāta-pauruṣa)の基準にも用いられる。
Rope standards enable repeatable site checks; officials cannot easily inflate excavation lengths/depths to overbill the treasury.