I designed the strips as a one way beam exactly how you just described and that's how i came up with the #4 bars each way. I followed the ACI design for the the strip widths. Thank you so much for your help and the quick response!
retired13 I included the slab self weight and a 40 psf live load with the correct load combo. and for the edge beam i meant to say 3 #5 bars top and bottom.
I was using 7 inches from the code. I'll bump it up to 8 inches for the double layer reinforcement. I'm checking the shear now and for the middle and column strips I'm using #4 bars @ 12" O.C. each way and that satisfies the minimum reinforcement.
@JLNJ I figured the plate would act like a...
@retired13 Ok i designed a beam that is 12 inches wide and 7 inches deep. I put 3 #4 bars evenly spaced and the moment capacity is roughly 16 kip-ft and the required moment is 10.6 kip-ft. I think it will work and now Ill just select some reinforcing from the CRSI manual for T/S. Am I thinking...
@retired13 I normally do a beam and treat it as a one way slab. The contractor would like a flat plate to make it easier to construct. So are you saying design a beam into the slab? Then just treat it as a one way slab?
I have the ACI 318-14 and the methods in the code are for 3 continuous spans each way. I only have 2 spans on the north side and 1 span on the west side. The code is confusing me and I'm having a hard time with this. Maybe i'm missing something obvious.
@structSU10 The slab will rest on the exterior walls. I'm normally don't work with suspended concrete slabs and I'm more of a steel guy. The client wants a concrete slab instead of a traditional wood deck. I just don't know how to calculate the punching shear on an exterior column in a flat...
I'm new to these forums and I had a quick question. I'm designing a suspended slab for a client and they want no visible beams on the exterior. two sides of the slab will connect with the house and the other two sides will be free. the two free sides will be held up with two HSS 4x4x1/4...
