Thanks Kbird1, I was able to get the slab created as you described, and add columns in Home Designer Pro 2015 from the library, but I couldn't get the zipped file you mentioned to open correctly. I'm guessing incompatible software versions. I also couldn't figure out how to get the beam above the columns. I'll attach a pick of what I've got so far, and look through the reference manual to see what I'm not doing correctly.