Here's the build of my tank and steel stand.
96" x 30" wide x 32" tall.
I think just one more section of the steel stand would do for yours.
( Note, I am not a professional steel tank stand designer, and anything I say
should be taken with a grain of salt )
http://www.reefcentral.com/forums/sh....php?t=2201396
Note: if you think my design might not be enough, you could always go the next size larger with the steel.