Need help !!!! floor supports for 260g tank

I believe the black pipeline is for your gas, just that alone would not try to jack the joist up, or put the aquarium in that area.

Little over 2100 lbs+.......I'd consider building load bearing walls underneath and blocking the joist solid......that's alot of weight on 2 or 3 parallel joist

Sent from my SAMSUNG-SGH-I317 using MonsterAquariaNetwork App

Looks like you are putting it over a gas line... It also looks like those are engineered joists and not solid wood. I don't know the strength ratios, but if you had notched a solid joist like that (at the bottom and not in the middle) you would have weakened the integrity of the joist. Sounds like a bad idea to me, but I am not a structural engineer, and that is who you should be asking imo.

appak said:

Looks like you are putting it over a gas line... It also looks like those are engineered joists and not solid wood. I don't know the strength ratios, but if you had notched a solid joist like that (at the bottom and not in the middle) you would have weakened the integrity of the joist. Sounds like a bad idea to me, but I am not a structural engineer, and that is who you should be asking imo.

Click to expand...

+1. Perhaps 2 railroad ties right up against the subflooring supported by 4 joist jacks

fast said:

The black pipe is the gas line and you are right, if the floor crash and break that line then im in big trouble

Click to expand...

Perhaps there's an option to reroute the pipes

xraycer said:

Perhaps there's an option to reroute the pipes

Click to expand...

If it was me I would replace the two notched joists too, or sister them.

Sent from my Nexus 5 using MonsterAquariaNetwork App

I am going the other way. I think you are in fairly good shape. That type of joist is actually stronger than the dimensional lumber that would be used in place of it. Holes in the web of 1.5" or less are generally not a problem. The glue lam beam on one end of the tank is the main reason I think you are in good shape. It makes for a short span with three joist under the tank. The only thing I might be concerned about is the joist hangers on the other end. I would probably put up a 2"x6" header spanning 4 joist and two jack stands at that end. You can make the header with 2 2"x6"s and a piece of OSB in the middle of them. Drive nails in at an angel on both sides to make the sandwich then install with the 6" side vertical, so you can see the OSB on the bottom of the beam.

I looked at the picture again and it looks like the joist are setting on the seal plate and not using hangers. If that is the case I would not change anything. But you should do what you think is best. I might be missing something just from looking at a picture.

I would not try to sister directly to the joist. The way they are made will make it hard to do much good with a sister joist. If you can fit an extra joist between each of the existing ones, going from the glue lam beam to the foundation, it would make for good insurance.