Anonymous ID: e5b9c3 Oct. 20, 2021, 9:16 p.m. No.14825033   🗄️.is 🔗kun   >>5085

>>14825020

Basements generally run with the outside supporting walls of the house. Earthquake shaking can dislodge and cause the house to collapse into the basement.

 

Tunnels are usually self supporting.