Joists with bathroom wooden beam on the upper floor 1/5 plan. 195 or cc 600, truss 120cc. Have fortified and reinforced by screwing on existing beams. Can't reach to frame 300cc, have to go out to the crawl space, and even if I demolish some slat I might be able to attach 2 more beams. Is that enough for a tiled bathroom and standard bathtub? Attached are the truss drawings, red is the bathroom.
It is a bit difficult to assess with regard to the drawing material. Since it is an asymmetrical load (closer to one support), it might possibly work. A floor plan and a closer description of how you have done the reinforcement would be good.
Thank you for the quick response. Simply screwed and glued 170x45 where I've reached 3 of them, from support legs towards the blue lines, 1860mm at the longest. Partly to have support for new chipboard and to reinforce. Battened where I've been able as well. The bathroom is 1.85x2.85. There will be 22m of chipboard and floating/screed afterward. There used to be a bathtub in the same place but with a plastic mat.
This means you have at least three beams that you have not reinforced. A simpler yet more effective way to reinforce is to screw-glue 4 slats (e.g., 22x60 mm) at the top and bottom on both sides of the existing 45x195 beams, so that it looks like an I-beam. I think all the beams in the bathroom should be reinforced. The bathtub isn't a big problem if it gets a good placement near the center of the house. It's rarely filled with water. Self-leveling compound + ceramics are worse.
Thank you for the response. I'm feeling uncertain. I will at least reinforce all the studs, wouldn't it be better with 90x45/70x45? In the worst-case scenario, I could tear down the sparse structure and get out into the crawl space and connect the studs all the way. Is the worst that can happen cracked tiles or the whole house collapsing?
No, the house isn't collapsing, but you may have wasted a dangerous amount of money for no benefit. I don't think it's worth the effort to go into the attic space relative to the trouble, even if it is the best option. You can use any dimensions for reinforcement as long as you utilize the height of the existing beams. Reinforcing with a 25x195 mm board provides as much strength as with a 45x170 mm. Mimic I-beams or U-beams.
