Just floored...
Just floored...
So, given that a rough estimate of the weight (including when people are hanging around looking at the tank) is ~7000 lbs, I got a structural engineer to draw me up some plans for floor reinforcement. Just got back from vacation, and the contractors (amongst other things) have laid the concrete pads, and then the vertical 4x4's that support a lattice of horizontal 4x4's directly underneath the tank.
On the above image, you can see the original piers that supported the house floor above the crawlspace. Then you can see the new ones in the foreground. The {red, black, blue} water lines are {NSW, waste, NFW} respectively, for the old tank. The new system will be the same, but use 2" pipes rather than 0.25" pipes. Hey, if I'm paying plumber to do it, I'll get it done properly
The above image shows that these new piers are 3' on centre apart. They're actually arrayed in a 4x3 configuration, to cover a 9'x6' space, with the tank centred in that rectangle. This is in *addition* to the existing flooring... There ought to be plenty of support
Simon