I don't think you need to distribute the load on the top two levels. Since the tanks are glass, and presumably have raised bottoms (weight rests around the bottom rim) you'll have beams directly under the front and rear long edges of each tank, right? If so, that's enough to carry the load, without any cross members or plywood. The weight is all carried by the front and rear long beams. If you add plywood and cross members, they will take some of the load, but that's optional. Am I missing something?I'd like to put plywood/OSB on all three tiers. This is not really acting as much of a support but is rather distributing the load. ... I'll have joists every 10-12" even though they may be overkill!
Foam board on bottom layer with 1/4"+ since this is only tank without rim around bottom?
I think plywood and foam is a good idea for the sump (bottom) level, just to guard against point pressure from a pebble or imperfection in the wood surface
I would run a board at the front and back even with the tank. Then joist hanger for the sides. This is not rcommened, but then this is a small tank 45 gallons)
I don't think you need to distribute the load on the top two levels. Since the tanks are glass, and presumably have raised bottoms (weight rests around the bottom rim) you'll have beams directly under the front and rear long edges of each tank, right? If so, that's enough to carry the load, without any cross members or plywood. The weight is all carried by the front and rear long beams. If you add plywood and cross members, they will take some of the load, but that's optional. Am I missing something?
- RocketEngineerI painted the wood in my stand. Pressure treated lumber uses some pretty nasty chemicals including copper. Why risk it having such things around the tank when regular pin will do fine.
My smart phone changes words to what it thinks I want to say.. I have seen some stands that look like the tank sits down in the stand so you do not see the sand bed. I like that look. But some one told me that is a place to trap spilled water and cause problems. Would it look Ok to just put molding around the tank and have a flat topped on the stand.bruce either way should work if I understand you. I would just build the stand the size of the tank and cover with plywood.