Reinforcing Foundation Joists

[Mr Cracker2u]

I guess if your going to have Friday night mosh pits in that room you might need to worry about bounce.

 

[Bud8Fan]

2 2x6's or 2 2x8's sandwiched together will make for a much stonger bean than a 4x4. Kind of like what they use for headers over large windows and garage doors in new framing.

 

[Raul-7]

2 2x6's or 2 2x8's sandwiched together will make for a much stonger bean than a 4x4. Kind of like what they use for headers over large windows and garage doors in new framing.

But that would require much more work, kind of tough in a dark and small space under the house.

 

[Bud8Fan]

You make the beam topside then take it down to where it needs to be set. The only extra work is screwing the two boards together. I found if you also sandwish some 3/4" osb or plywood in the middle the jack plates fit on the beam better.

You can sure use a 4x4 with a 90 gallon I'm just saying a 4x4 can not carry a lateral load near as well as a beam constructed as I mentioned above.

Of course you can always go even further and get a steel beam.