What are the best methods for securing bottom support beams and framing in a sunroom with treated 2×4 and cement?

Hey, quick update on my progress! Since my last update, I’ve been making some serious headway here. Check it out:

✅ Sunday – Made 3 trips to the dump (over 1k lbs each time)
✅ Monday – Scored some support beams on the marketplace
✅ Also on Monday – Made 7 trips to the hardware store
✅ Tuesday – Got rid of siding, window, and tongue and groove
✅ Wednesday – Stocked up on lumber and built a support wall

A few things I’ve learned along the way:

1. Demo work is not as exciting as I thought it would be 😅
2. Just a heads up, I’m pretty much doing everything solo
3. Driving a flex makes hauling beams and lumber a whole production
4. Turns out, my trusty oscillating Dremel was the hero all along – no need for all those extra saws and blades!
5. Removing siding and tongue and groove was like performing surgery – had to be careful with my cuts
6. Building a support wall alone requires some serious creative thinking!

I’ve got a couple questions for you:

– Best way to secure the bottom support beams? Screw it to the