Slab Design

two of course

http://civilengineersforum.com/difference-between-one-way-slab-two-way-slab/

Whichever best matches the needs. If is a slab on grade, how is it loaded? If it is elevated, how is it supported?

Being the suspicious type, and suspecting that your question is loaded, I have to ask. Why, if your home page is a civil engineering site, would you ask such an elementary question? Are you a student?

Difference between one way and two way slab in terms of their ...

Difference Between One Way Slab and Two Way Slab

Concrete slab - Wikipedia, the free encyclopedia

In Google there are several excel programs that you can punch in your data for both one and two way slabs to determine which one would be better in your situation. Since you haven't supplied any data an answer can only come from you going on your own and researching it this way.

I'd use a double henway.

Not enough information was given to provide a satisfactory answer. A host of factors which type of slab system is the most appropriate. I'm assuming that you're talking about a suspended slab and not a slab-on-grade, correct?.

Some of the factors are: clear span dimensions in each direction (x and y axises); slab thickness; reinforcement requirements and limitations; design live loading; beams or girders, or the absence thereof, to support the slab; deflection criteria; concrete compressive strength; concrete tensile strength; concrete modulus of rupture, rebar yield strength; fire code requirements and limitations; and lastly, governing Building Code requirements.

If you're a student, then I strongly suggest that you crack open your assigned text book and start studying, because your posed question is so elementary and demonstrates a true lack of understanding of the difference between both types of slabs.

Enough said.....

there isn't information to give a bad answer! haha

I prefer my slabs to be three dimensional. The two dimensional ones are thinner than paper and just don't hold up.

As an engineer; perhaps, you are interested primarily in cost. Your question has an infinite amount of variables that could affect cost. Since you have not provided the full details for your question I have simplified your question.
The slab is suspended and supported on four sides and meets the dimensions for two-way slab consideration and your design is for many symmetrical modules. If this is the case you would choose the two-way slab design.
However, slabs normally require openings and openings will require special reinforcing consideration, your supports will have openings and will require special supporting considerations for two-way supports, and if it is is suspended you may want to have uniform thickness.
Consequently you may end up with a one-way slab.
If your situation is an isolated case and you have full bearing supports at all ends and you have no openings then you could use a two way slab design.
Reference: "Plates and Shells" by Timoshenko