if it has a wood frame then yes, you are protecting the glass with framing. You may want to consider other options as well for your own peace of mind. A center cross brace, euro-bracing, etc. But in doing so you allow yourself to use thinner glass which is less expensive. It is all a matter of what you feel comfortable with. In general from my experience on here with those you have used my calculator to design their aquariums most people settle around 2.2 in SF. YMMV We love drawings done in paint or sketchup here and detail makes it a lot easier for us to give feedback.