I have a condition where the beams (& edge of slab) intersect at the column at an angle. They are not aligned with each other and/or with the column face. This is a PT slab and due to the obvious reason, my service condition stress is not working because…

I am getting this warning "Inconsistent tendon half span ratios" in my PT slab model and I am unable to figure out the reason. I tried to look into the manual but didn't find anything helpful to resolve this warning. The inflection point ratio (0.2) is…

For context working on a 8in PT slab. In the banded direction in my interior bays I have 24 strands (26.8 kip/strand) for a trib width of 29 ft. Thus I have a stress of 230 psi (24'*26.8kip/ft / (28'*12*8")). When I look at Centroid stress plan under…

Hi, I'm just wondering why the slab stresses value remain the same after I adjust the tendon profile? Theoretically, the bottom tension stresses should reduce when I lower down the low profile. Please find the attached model files for your reference…

Hello, My RAM Concept Model is showing a failure at slab midspans in the Design Status: Status Plan. However, when I audit the cross section the Final Check for ACI 318-14 Service Designer Section Analysis says No Failures. For example, the attached…

Hello, My RAM concept model is showing a service design gross top stress failure and I am having trouble figuring out how RAM is calculating this value. I am trying to find the maximum negative moment overstress in order to design FRP reinforcing around…

Hello, I have recently come back from UK where I did extensive PT design to EC2/TR43 standards, I was very comfortable with the use of RAM to these codes. For 2-way slabs; Full width strip design and Top/Bottom Concrete Stress limits were very simple…

I have modeled a PT Slab and after running the calculations the Design Status shows shear failure at three strips right next to walls. When I looked at the shear capacity of those strips, I noticed that it has values of zero at mid span for the three…

Hi, Is there a way to allow Concept to check/ design Class C Prestressed Flexural members per ACI318-11 18.3.3.? We keep getting the 18.3.3 failure but the max allowable stress that is calculated limits the slab to Class T. I saw in another question…

Are the above mentioned stresses added to the stress in the orthogonal tendons when checking a PT flat plate?

Hi, I am just wondering how to model soft spot on RAM Concept. I have treated them as an opening, however, when we have walls below it doesn't work because the wall won't be attached to the slab. Any ideas? Many thanks, Leticia