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When we have a Coupling beam, wich has a "X" reinforcement. Should we use the Aci flexural (longitudinal) reinforcement required in addition to the other reinforcement stated in chapter 21, or shall we use the ACI min flexural reinforcement? Because the SEAOC doesn't recommend the...

dear biten and chiba : in the case you are presenting, of the flat plate and columns only, the first thing is that on the structure you are using I would not recommend it as high as 3 to 4 floors, because to control the deflections on the structure should lead to larger columns. On the Rw...

thanks a ot for the advice JAE, I was thinking of that too!!! I just wanted to see what other opinions you guys could drop tanks again

I have a question concerning the behavior of the PT slabs, specially for the flat plate system. If Im working with a building that his primary lateral force resisting system are reinforced concrete shear walls, and my default building code is the ASCE 7/95, the reduction factor for the seismic...

thanks for the recomendations, I will work with the point loads. I think is more real than the distributed load

I have an issue here. I'm calculating a post tensioned residential flat slab. The thing is that the columns that support the roof fall directly onto the slab. I was wondering what type of this methods should I use : 1- apply the column loads directly onto the slab as point loads. this could...

Thanks for the answer, does that structural engineering handbook works with asd or lrfd design. Does it have other good resources for steel design??? I also have questions regardind the design of rigid single span steel frames with knees with the LRFD method. I looked at an article from aisc...

Is there any text or reference in order to make the design calculations for a stiffened column base plate??? How do I analize it

thanks for your reply qshake. I have seen that on the bottom of the single pile cap you use a minimum reinforcemnt ratio, I think is 0.0018 just like a footing. You use this reinforcement both ways on the bottom of the pilecap. The pile cap is in pure compression and I think this bottom...

When I have a single pile cap for a column. Is there any parameter or rule of thumb considering the depth of the pilecap and the amount of reinforcement required??? If you analize it theres no punching shear on the pile cap, and there is no moment applied to it, except if there is an...

Is there any literature where I can find this method???

Just to clarify what qshake wrote, you say that I should check the top steel with the tension and moment load applied to the pile cap, with the same method that I used to design the bottom mat of the pilecap?? thanks

Is there a method or parameter of reinforcement to be applied on pile caps that are under tension loads?? the theory always induce that the pilecap is in compression load applied by the column or wall that is on it. Also, I've seen that some persons use some reinforcement on the top of the...