For AS 3600 2009 your bottom steel is probably controlled by section 8.1.6 or 9.4.3.2. For span detailing of RC and PT Two-Way Slabs - Figure 9.1.3.4 is implemented in support and span regions. Clause (b) says to use 75% of the area required by one of…

We do use the thinnest part of the failure plane for the punching shear calculations. Below is some feedback from the program development manager regarding why we took this approach: The code provisions are based upon a model introduced by B.V.…

A colleague who is more familiar with the AS 3600 code offered this help. AS 3600 breaks down total shrinkage into autogenous shrinkage and drying shrinkage, whereas Concept only has a single value for shrinkage that represents the combination. I think…

According to the program manual, for one-way slabs, two-way slabs or beams, the program checks AS 3600-2009 section 8.1.6 and 9.4.3.2. If you turn on "Controlling Criteria" through visible objects in Ram Concept you should be able to see which is controlling…

I ran your file with the CONNECT edition (v6.0). 1. I’m not seeing anything that I would call excessive reinforcement around the innder triangular core, not parallel to the walls, nor perpendicular. Since the slab terminates at the wall centerline…

Take a look at the program manual, section 60.6.7 Section 8.1.5 Ductility of Beams in Bending for details on how section 8.1.5. is implemented (in AS 3600-2009). It is noted that the challenge here is to simultaneously provide positive moment ductility…

In AS3600-2009, the Initial Service code check for a PT slab is code section 8.1.6.2. In the Concept manual, section "60.6.6 8.1.6.2 Transfer Compressive Stress Limits" we give some details about who this is implemented. Here's a copy of that, I think…

You might find the section design plot for "Shear Density" to be informative. In the case os your right middle strip, the shear demand is indeed quite small, but a plot of Strength Design - Shear density indicates ties are required at several stations…

I'm paraphrasing something from the Ram Concept development manager, but this seems to fit your situation: Question: " Could you please confirm what we would be using as the value for Creep Factor in the Calc Options menu input. We design to AS3600…