flatness, levelness and thickness of warehouse slab
flatness, levelness and thickness of warehouse slab
(OP)
Hey all - I'm reviewing a set of plans for a very large storage warehouse. The owner intends to lease part of it out and they're not sure what the tenants will be storing. Because of this, I'm trying to give suggestions as to how they can keep the warehouse flexible as far as storage allowances go. One of the issues that I don't have much experience with is the flatness/levelness of the slab on grade. Storage can be as high as 36 feet and I know with multi-level rack storage, the flatness will be important. I was thinking of suggesting that they specify at least a flatness of 30 and levelness of 20.
The other issue is the thickness (currently 7" unreinforced). I don't have a problem w/ unr/f - joint spacing is good and compaction of soil will need to be strictly enforced. I am going to suggest using a thicker slab however, in the event that the rack loads are higher (we don't know types of racks, loads or traffic).
Thoughts and recommendations appreciated!
The other issue is the thickness (currently 7" unreinforced). I don't have a problem w/ unr/f - joint spacing is good and compaction of soil will need to be strictly enforced. I am going to suggest using a thicker slab however, in the event that the rack loads are higher (we don't know types of racks, loads or traffic).
Thoughts and recommendations appreciated!






RE: flatness, levelness and thickness of warehouse slab
Thickness depends on the soil and consolidation as well as conc strength, fatigue, etc. You should look at a program that designs slab thickness for various loads and spacing of loads.
Dik
RE: flatness, levelness and thickness of warehouse slab
FL/FF is in the ballpark. I think we use a global 24/20 or a 20/24 I can't remember which way we usually go. Local FF/FL is more along the lines of 24/32.
RE: flatness, levelness and thickness of warehouse slab
Don Phillips
http://worthingtonengineering.com