Another Slab on Grade Question
Another Slab on Grade Question
(OP)
A coworker is designing a slab on grade for a warehouse, about 12,000 SF; heavy forklift loads. She's of the opinion that T&S steel is needed no matter what. I'm of the opinion that it's a cost trade off between sawing and sealing joints in an unreinforced slab versus placing bars and sawing and sealing fewer joints.
The project is in a location where I doubt the concrete supplier would be capable of providing shrinkage compensating cement or fibers.
Any thoughts?
Thanks
The project is in a location where I doubt the concrete supplier would be capable of providing shrinkage compensating cement or fibers.
Any thoughts?
Thanks






RE: Another Slab on Grade Question
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RE: Another Slab on Grade Question
BA
RE: Another Slab on Grade Question
Intermodal facilities and large warehouses in Australia, for example, are often constructed with bonded (grouted) PT.
I know this does not answer your question, just thought I would add it to the discussion.
RE: Another Slab on Grade Question
bb...agree with you and SRE. I'm not a fan of steel in slabs on grade. A very flat subgrade, larger aggregate in the concrete; and proper location, depth and timing of the sawcuts are the better mitigation techniques.
I use 24 to 36 times the concrete thickness for joint spacing, 1/4 x thickness for depth and sawcut same day as placement....no matter how late that might be! No waiting till next day!
FAQ for Preventing Random Cracks in Slabs on Grade
RE: Another Slab on Grade Question
BA - I'd like to try the fibers - I've heard good things about it - but I don't think the concrete supplier would be able to do it. A few years ago at the same site the local supplier couldn't provide a mix with Type III cement. Another project I'm involved with is going to use fiber reinforced UHPC for the joints between precast panels.
Ingenuity - post-tensioning is a good idea but it would be beyond the capability of the contractors in the area. At the same site there was a contractor who thought bending a#6 bar would break it.