द्विहस्तं तोरणशिरः ॥ कZ_०२.३.२३ ॥
dvihastaṃ toraṇaśiraḥ
Bagian kepala/atas lengkung gerbang (toraṇaśiras) harus berukuran dua hasta (dua cubit).
Uniform dimensions simplify procurement, reduce fraud in materials, and ensure structural consistency across state works.