पृथुशिलासंहतं वा शैलं कारयेत् न त्वेव काष्टमयम् ॥ कZ_०२.३.०८ ॥
pṛthuśilāsaṃhataṃ vā śailaṃ kārayet na tveva kāṣṭamayam
应当用石料建造——或用宽大的石板紧密拼接,或用整块坚实的石材;但不可用木材建造。
Timber increases vulnerability to fire, decay, and enemy sabotage; stone improves survivability under siege and reduces maintenance risk.