We implement IFC bridge in our bridge calculation software and we have found that for the reinforcement of slabs and box-girders nothing in the IFC is provided to define reinforcement layers in a global way: It is necessary to define the bars one by one. This is totally impractical unless you admit that almost the entire file contains entities of the bar type. In addition, relevant information such as the coatings, the gaps between bars, the level of the layer are not transmitted, whereas they are useful for implementation on the site. I think it is very important to improve the ifcs in this area.
To this end, I have written a proposal that I can make available to those interested.
I am waiting for your reactions.