विष्कम्भचतुरश्रमट्टालकमुत्सेधसमावक्षेपसोपानं कारयेत्त्रिंशद्दण्डान्तरं च ॥ कZ_०२.३.१० ॥
viṣkambhacaturaśramaṭṭālakam utsedhasamāvakṣepasopānaṃ kārayet triṃśaddaṇḍāntaraṃ ca
He should build a square watchtower with the prescribed breadth (viṣkambha), with stairways proportioned to the tower’s height and ascent/descent; and he should keep an interval of thirty daṇḍas between such towers.
Uniform spacing optimizes surveillance coverage and defensive fire support, while simplifying planning, budgeting, and inspection.