i built mine for my tank . i have pics but cant figure how to post them yet . ill try again later . I took lumber from a 100 year old redwood water tank, planed it down , joined ,etc. etc. it supports a 100g and the idea is not to get into over kill but to make it strong . 1 1/8 top and bottom (i had it laying around, but over kill ) 1/2 inch back , all the redwood is 1"thick . for the most part the im happy with it but i am picky about my work .