||09-07-2010 01:36 PM
Basement Metal Support Post
I have a question regarding the potential impact of an adjustable metal support post in my basement. The house is about 100 years old and was originally constructed using a stone and mortar foundation. At some point, a concrete wall about 6" thick and 3' high was added on the inside of the basement, along with a concrete floor, and an external concrete wall around the perimeter of the house just below the sill level. The house is on a steeply sloped property and the north side of the basement often takes in water that flows out of a hole in the basement floor on the south side. The main support beam runs down the center of the house from north to south, and had 2 evenly spaced metal support beams encased in the basement concrete floor. The last stretch was without a post when I purchased the home 3 years ago. The home inspector recommended I add a 3rd post to even the load. At that time I purchased a metal support post and placed it under the beam with the thread side down. I recently noticed a small crack in the basement floor a few inches away from all 3 support posts that roughly parallels their location under the main support beam. The crack runs from one end of the house to the other, and seems to extend a bit up into the added concrete retaining wall. It is entirely possible this crack existed 3 years ago and I didn't notice it. If not, is it possible that the addition of the 3rd post caused it? I would greatly appreciate any comments and/or suggestions...