(waits to view dwzm using concrete railroad ties and steel rebar to form a structure to support that beast!)
The tank will be in the center of the home as pictured earlier in the thread. The flooring in this area is carpet, with 3/4" chipboard subfloor, on top of two layers of (original) roughly 3/4" softwood boards that formed the original subfloor for the house. So with respect to subfloor, the materials aren't the best, but it's darn thick. Directly underneath the tank's location are two main beams from the original post-and-beam structure (house is around 200 years old). One of these is about 16" square, the other is about 6" x 8". Right near the "back" end of the tank (towards the bathroom) those beams rest on an original stone foundation wall. The beams run parallel to the long direction of the tank, and span about 12'.
I screwed a 4' long 4x4 beam to the bottom of each of those beams a few feet out from that foundation wall, such that the end of the 4x4 is roughly where the end of the tank will be. These should help support the load in the event that the original beams are damaged in some way I can't detect (rotted, cracked, etc). They look solid, but you never know in an older structure.
Then, there's a 4x4 post under each of the beams.
At the bottom of the 4x4 post, I used a solid concrete pier block (as you'd use to support a deck or other outside structure). These blocks weigh 50 - 60 lbs each. I built a 2x4 frame that's about 6" bigger than the bottom of the blocks, and poured concrete around each of the blocks, to firmly set them against the basement floor.
That's the structure to
support the stand. FWIW, I had the 125g pictured earlier in the thread in this location without issue, with none of the added reinforcements.
For the stand itself, I built a 2x6 frame as seen under the tank in the above photos. This will form the top frame of the stand. It's a single 2x6 on all sides except the long "back" side, which is two 2x6 beams. I doubled up this side because there will be only one post supporting the middle, to allow room for access doors. The other three sides will get 2x4 posts regularly spaced. The bottom frame of the stand will just be 2x4 lumber laid flat.
Above the stand, I will build a "hood" structure out of 2x4 lumber. The stand and hood will be built flush with the tank. Then, I'm going to hang drywall over the whole thing, floor to ceiling. Then, cut the drywall out for viewing panels and access doors in the stand and hood. Then, finish the cut drywall edges, hang some doors over the openings, and DONE.
I'm a little undecided about the EXACT methods for the drywall hanging, since I won't be able to screw it into the tank (obviously), I'll probably use drywall adhesive to glue it on, and just hope that screwing it into the hood and stand provides enough pressure to hold it flat against the tank while the adhesive cures. Also, a little unsure about finishing the cut edges around doors and the viewing panels - I don't want to trim them out, I just want a clean, sharp edge. Luckily, my father in law is a retired drywall contractor, so he will be able to help with these details. And two of my brothers are general contractors/finish carpenters, so they'll be able to help with stand construction and finishing out the drywall, too. My uncle, the licensed electrician, is available to help if I get stuck finishing the wiring. I was born into the right family to tackle a project like this. :lol: