अन्तरेषु द्विहस्तविष्कम्भं पार्श्वे चतुर्गुणायामं देवपथं कारयेत् ॥ कZ_०२.३.१३ ॥
antareṣu dvihastaviṣkambhaṃ pārśve caturguṇāyāmaṃ devapathaṃ kārayet
In the interior intervals he should make a devapatha (internal passage) two cubits wide, and along the sides four times as long (in proportion).
Standard widths prevent bottlenecks, enable quick reinforcement, and support predictable patrol and evacuation movement.