The structure of Huamark police station in Bang Kapi district has been ruled safe, even though the floor in part of the building suddenly subsided on Wednesday morning.
Engineers inspected the building and the collapsed floor of the 56-year-old station on Ramkhamhaeng Road on Friday.
The floor cracked and then crumpled and sank, creating a big pit up to 50 centimetres deep.
Apart from the floor collapsing in the two adjacent divisions, there was no other damage to the building structure. Officials would check the floors in other rooms at the station.
The chief of the police station said that on Wednesday morning he was informed that cracks had appeared in the floor of the traffic division. He evacuated all staff. A few hours later the whole floor collapsed.
No one was injured and damage was not major, he said.
Officials reported that the floor had been laid directly on the ground. They blamed the floor's collapse on gradual soil subsidence.
