Thicken slab for cmu wall
Thicken slab for cmu wall
(OP)
the cmu walls are interior partition walls about 10 ft tall, for some locations is 8" CMU , some is 6" CMU.
the cum wall will sit on slab on grade at bottom. the typical slab on grade is 4" reinforced with WWF. the wall will be braced at top to roof joists.
so obviously I need thicken the slab for those CMU walls.
I am thinking the thickened slab will be 8"x14"(wide), with (2)#4 continuous, with dowel #4 @ 32" OC to CMU from slab.
Does that sound right?
I did not check the wall its self yet. I plan to
grouted @ each course and reinforced with #4@32"0C (vertical)
Any suggestions and comments?
the cum wall will sit on slab on grade at bottom. the typical slab on grade is 4" reinforced with WWF. the wall will be braced at top to roof joists.
so obviously I need thicken the slab for those CMU walls.
I am thinking the thickened slab will be 8"x14"(wide), with (2)#4 continuous, with dowel #4 @ 32" OC to CMU from slab.
Does that sound right?
I did not check the wall its self yet. I plan to
grouted @ each course and reinforced with #4@32"0C (vertical)
Any suggestions and comments?






RE: Thicken slab for cmu wall
In situations like this, I always pour an footing below the interior walls also, similar to the perimeter. Then, the contractor can lay one course of block, perfectly level, then pour the slab around/in between walls.
This way you are no laying the block on the slab, which can be hard to pour flat and the walls are keyed at the base.
RE: Thicken slab for cmu wall
This is, of course, for non-load bearing walls. For load bearing walls, provide a real footing.
RE: Thicken slab for cmu wall
RE: Thicken slab for cmu wall
Dik
RE: Thicken slab for cmu wall
Rather than use Lally columns and a beam, I poured a footing right down the center of the basement along with the perimeter footing. I laid one course of 4" block (4" wide, 8" tall) and built a load bearing wall on the block. The advantage being that I knew the block would be level and slab would be wavy. When complete you see 4" of the block sticking up with the stud wall on it. The concrete finisher ran his saw right up to the edge of the block. Worked out great.
RE: Thicken slab for cmu wall
RE: Thicken slab for cmu wall
Arguing with an engineer is like wrestling with a pig in mud. After a while you realize that they like it
RE: Thicken slab for cmu wall
Dik
RE: Thicken slab for cmu wall
DaveAtkins
RE: Thicken slab for cmu wall
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Thicken slab for cmu wall
http://www.wbdg.org/ccb/DOD/UFC/ufc_3_320_06a.pdf
I believe that the information relevant to wall loads is in Chapter 3. Hope you find this helpful.
- The Penguin
RE: Thicken slab for cmu wall
We've generally been letting these wall rest on typical slab (non-thickened). Do you guys think a 5" building slab can't handle the self weight of a 10 foot non-load bearing CMU wall filled at 48" on center?
I don't believe we've had any problems with not thickening the slab for these walls.
RE: Thicken slab for cmu wall
RE: Thicken slab for cmu wall
Thoughts?
RE: Thicken slab for cmu wall
Arguing with an engineer is like wrestling with a pig in mud. After a while you realize that they like it