समुच्छ्रयादर्धतले स्थूणाबन्धश्च ॥ कZ_०२.३.२१ ॥
samucchrayādardhatale sthūṇābandhaśca
At half the height of the structure (relative to its total rise), there should be a binding/tying arrangement of posts (sthūṇābandha) as well.
It encodes a minimum resilience requirement that inspectors can verify, reducing collapse risk and public liability.