Jack post inside foundation wall...
#1
08-16-11, 09:19 AM
Jack post inside foundation wall...
I am thinking I am going to cut 2 large windows into a basement 8 inch thick concrete foundation wall. I could cut one large opening if I could put a jack post in the center of the opening and then install windows on either side.
Is it possible and/or smart to put a jack post inside of an opening in the concrete wall? I am wondering if I would have issues drilling into the concrete to bolt the post with possible cracking?
Is it possible and/or smart to put a jack post inside of an opening in the concrete wall? I am wondering if I would have issues drilling into the concrete to bolt the post with possible cracking?
#3
08-17-11, 08:03 AM
Header for sure, I was just trying to keep the forum post succinct.
One detail I missed was that the concrete wall is 8 inches thick.
One detail I missed was that the concrete wall is 8 inches thick.
#4
08-17-11, 08:03 AM
Member
I don't think you can use a jack post as a permanent structural component. I know I can't in my area. You can cut a lally post to fit but there are other, easier options.
You need to put in a header properly sized for the opening.
You need to put in a header properly sized for the opening.
#5
08-17-11, 08:40 AM
What is the difference between a jack post and a lally post?
Also what are these other easier solutions?
Also what are these other easier solutions?
#6
08-17-11, 08:52 AM
Jack post inside foundation wall...
I have a large opening in a load bearing, 8 inch thick poured concrete exterior basement wall. Do you think I could install a jack post under a header within the opening in the wall?
I am concerned if I drill into the concrete it may split since it is only 8 inches thick and the jack post plates are 6" wide...
I am concerned if I drill into the concrete it may split since it is only 8 inches thick and the jack post plates are 6" wide...
#7
08-17-11, 05:38 PM
Adjustable Steel Columns
According to that site jack posts shouldn't be used for that purpose because the diameter is less than 3 inches. It also doesn't show a difference between jack & lally. If you are not filing plans with the building dept, then you can do whatever you want. I wouldn't worry about the block splitting since you can patch that at the end of the job.
Did you open the wall without installing a temporary header?
According to that site jack posts shouldn't be used for that purpose because the diameter is less than 3 inches. It also doesn't show a difference between jack & lally. If you are not filing plans with the building dept, then you can do whatever you want. I wouldn't worry about the block splitting since you can patch that at the end of the job.
Did you open the wall without installing a temporary header?
#8
08-18-11, 09:36 AM
Yes I did, it really isn't that much of a load. If it was even close I would have put up a temporary brace. Whenever I do these type of jobs I just like to overbuild them just to ensure I don't have to worry about strength.
Thanks for the article, it actually says they are legal in Canada - and that is where I am. I see jack posts holding up beams in every basement here. Still not sure if they would be OK in an exterior wall though - rust being a concern too. Leaning towards just using a couple of 2x8s now anyway - would be a 100 times easier.
Thanks for the article, it actually says they are legal in Canada - and that is where I am. I see jack posts holding up beams in every basement here. Still not sure if they would be OK in an exterior wall though - rust being a concern too. Leaning towards just using a couple of 2x8s now anyway - would be a 100 times easier.
