Can I get back to you in the morning?
What exactly is the span of the beam and what will be the joist length on each side of the beam? Will it support any ceramic tile?
I assume this will be supporting this single floor only and nothing else?
Is there a wall above where this beam will go? If not then it won't support the roof
Thank you. I'm running numbers now.
You can plan for a W5x19 beam ASTM A992 Gr. 50. It's 5" deep x 5" wide and weighs 19 pounds per foot
So right now there is a load bearing wall near the mission of joists? With no wall or beam below the joists at that location? That doesn't sound right. I will size the beam for that if you want me to, but that doesn't sound right. It would be exceptionally uncommon to have a bearing wall load joists and not have a beam or wall below
I will assume it's supporting the roof, too. What is the city and state so I can look at snow loading?
Yes. That's completely unstable.
Yes. That's relying on the joists to keep it stable. That's not prudent if the load resultant is directly over the post. It will not be, which makes it much worse. Two posts are critical
Exactly. You need two posts for the beam
21'? I thought the beam only needed to be 10' long maximum. If it's going to be 21' that will make a big difference.
How much of the joist depth is cut away? Do you have utilities running through the joists?
A picture would be great. Bid the sag only in the couple joists that were notched?
What is the smallest unobstructed dimension from the bottom of the subfloor to the highest obstruction on the side with the highest obstruction at the lowest elevation?
Anything that would prohibit sistering the joists