For concrete parts, each concrete part is considered a separate cast unit. For construction purposes, you may need to merge several concrete parts into one cast unit. If you model cast-in-place concrete structures, you may need to check how to work with pours. And once you have created a model of concrete parts, you will need to reinforce the parts to gain higher strength for the parts.
Additionally, you may need to use points or construction objects as modeling aids. Points and construction objects help you to place other objects in the model.