建筑坍塌事故有预兆吗？
Is there any sign of building collapse?
建筑坍塌预兆
Omen of building collapse
预兆一：地面突然下陷、空鼓或裂缝突然加大。
Omen 1: the ground suddenly subsides, hollows or cracks suddenly increase.
预兆二：承重柱、梁、板或墙体出现严重裂缝，并持续发展。
Omen 2: serious cracks appear in load-bearing columns, beams, slabs or walls and continue to develop.
预兆三：承重柱、梁、板或墙体产生过大的变形，木构件或连接部位严重腐朽或已被白蚊蛀蚀。
Omen 3: excessive deformation of bearing column, beam, slab or wall, serious decay of wood members or connection parts or being eaten by mosquitoes.
预兆四：墙体或天花的批荡层突然大面积剥落、脱落。
Omen four: the wall or the ceiling of the swing layer suddenly large area spalling, falling off.
预兆五：房屋突然发出异常的声音，如“噼啪声”、“喳喳声”、爆裂
Omen 5: the house suddenly makes abnormal sound, such as "crackle", "chirp", burst