280g Inwall

[MitchM]

Originally Posted by Delphinus

Currently, I'm at a bit of a standstill because the joists have more flex to them than I anticipated. I only have 1/2" of clearance between the framing and the top of the tank, and it appears that if someone walking in the living room directly above, hits the "sweet spot", there is about 1/2" of flex in the whole joists. This means the framing actually can contact the tank. Not good......

Hi Tony,

If the crossbracing isn't working out, and the joist spaces have mechanicals running through them that would prevent sistering of the joists,I have a couple of other suggestions:

-It looks like your door frame wall is extending into the floor joist space above. The best way to frame and attach a wall to a ceiling is to first place blocks between the joist space above where you want the wall, then build and attach the wall to that height. Usually you place blocks every 24" for drywall backing, but the structure of the door wall will also add some stiffness to the floor above.
Glue and screw the blocks to help even more.
Maybe use that 2 x 10 for the blocks and place them every 16" or even 12".

or

-re-frame the bulkhead above the aquarium to allow for the flex and cover the space with moulding trim.

Mitch