At first my apologies. I was running into a lot of trouble uploading photos on Imageshack. It took me nearly 6 weeks to isolate the issue. It will take me another week or so to resolve the issue.
Venkus wanted photos of my UPS cabinet. I am showing them below.
This is the cabinet as seen from outside. Fortunately I had a U shaped alcove in the wall, and I made the cabinet to fit inside that. The cabinet has been designed and made to stand the weight of two full size batteries as well as an inverter.
Another view of the cabinet with it doors open.
Here is view of the cabinet's bottom. What I did was as follows. I got a solid Teak wood block of 2 inches by 2 inches by 70 inches. I got one diagonal of the block carved in a wood lathe. The wood block was cut to the appropriate sizes and a 'V' joint was cut in the corners to fit into each other at the back. I now had three wooden block - two of approximately 14 inches long and one of 42 inches length. The longer one goes on the back wall and the shorter ones on the side wall.
I sank 12 metal wall plugs (that uses a nut instead of a screw) into the wall - 3 on each side and 6 on the back wall. I drilled small holes into the teak wood block as needed after measuring the exact position of the wall plugs. The holes in the wood block were sunk using a drill bit that matched the diameter of the wall plug nut. This went all the way through. Then using another bit that matched the diameter of the nut head, another 1/4 inch hole was sunk on top of the existing hole. This way the nut will go completely into the wood and can be covered with putty. I now had a solid shelf holder ready.
I fixed the wooden block on the wall. I then got a solid teak plank that was 42 inches (length) by 14 inches (width) by roughly 2 inches (thickness). I just placed the plank in top of the wooden shelf holder.
On the outer edges of the cabinet I got a small frame constructed using teak ply, and go two doors fixed on the frame. the frame was fixed to the wall using plastic wall plugs and ordinary wood screws.
A view of the left corner bottom.
A view of the right corner bottom.
I am quite confident that this cabinet will hold close to 100 kg without any issue, though I may never need to load it that much.
Cheers