Following up this article..Possible uneven settlement of reactor 4
On 5/25/2012, Tepco announced that the wall on the west side of reactor 4 building bulged.
Also, the reactor 4 building is leaning to North West. They surveyed from 5/17 to 5/25/2012.
From their survey, the corner of south west come out 33mm at 13m hight from the ground.
However, Tepco states still it’s within the safety limit of Building standard law. (65mm)
The data about the leaning building is like these below.
(The safety limit of the slope regulated by Building standard law is 1/200.)
The data of the bulging wall on the west side is below.