Concrete House Plans What Would Cause The Concrete Floor In 70 Yr Old House To Suddenly Crack And Drop?

What would cause the concrete floor in 70 yr old house to suddenly crack and drop? - concrete house plans

My house is 70 years and never had a structural problem. The basement is concrete with vinyl records for them. Approximately 2 months, cracked the floor and fell over 1 / 4-1 / 2 inches in a circle around the beam - about 1.5 meters from the blast.

I realized today that began in other areas of the plant to lift and the word has several starting points slight increase. All that has changed is cut down a large tree on the way back in April was the backyard.

I intend to get a structural engineer, but I wondered what should get a plumber in search of a broken pipe under the house. What could cause to say such a thing? Any idea is welcome.