Clarifier Slab Design Question
Clarifier Slab Design Question
(OP)
We have been contracted third party to come up with a design solution to a problem with the original design. The clarifier is 70' x ~15' tall, steel walls, flat concrete base. The original design was to ACI 318 instead of 350. The question is whether or not we can change the existing concrete slab designation to be a slab on grade if we add a membrane (whether it be concrete or other material), so that the ACI requirement changes to 318 instead of 350?






RE: Clarifier Slab Design Question
RE: Clarifier Slab Design Question
RE: Clarifier Slab Design Question
So I don't think that use of a membrane somehow deletes any requirement for using 350.
Using 350 is described in the introduction as:
ACI 350 has no legal status unless it is adopted by government
bodies having the power to regulate building design and
construction. Where the code has not been adopted, it may
serve as a reference to good practice.
I think this might be more a judgement call on the engineer to determine the ramifications of the smaller reinforcement on the long-term water tightness of the concrete and its lifetime performance.
RE: Clarifier Slab Design Question
RE: Clarifier Slab Design Question
RE: Clarifier Slab Design Question
Everyone wants a bldg. code paragraph which points to the exact same detail and conditions for anything and everything they are trying to do. And, the codes are quickly moving in that direction too, voluminously, and ever more prescriptively. Soon we won’t be able to do anything in the way of Structural Engineering, and that includes anything based on experience and good engineering judgement, if the detail isn’t explicitly shown in the codes. Of course, that does seem to be the way Structural Engineering is going these days anyway, as less and less of the experience and judgement needed are available; hell anyone should be able to do it if they can only read and understand the convoluted verbiage which is hoped to, intended to, cover every possible situation in the universe. Soon, we’ll be out of business, they can just say on the plans, “contractor to follow bldg. code and its tables, combine details 34, 278, 300683, etc., and start buildin, no engineering judgement or experience required.”
RE: Clarifier Slab Design Question
Thanks again
RE: Clarifier Slab Design Question
Dik
RE: Clarifier Slab Design Question