Don't know if you decided/finished yet, but I will add that I just did this with my shop. My span is about 31' wall to wall and the loft is 8' wide. I told the engineer to design it for as big a load as she could before hitting an exponential cost increase. I also didn't want a 30" tall beam! In...
Dunno, I'm hoping the sealer will make it last, but that's why i titled it so far, so good ;)
i was actually amazed the bucket of crystals wasn't white. Its been sitting around for close to ten years.
Now for a little experiment: While I was looking for information on staining concrete I found that most of the brown stains contain some form of Iron Sulphate. It just so happened that I had a left over bucket of Copper Sulphate that was used for weed control in our pond. Hmmm, copper instead...