Tank questions

[Gools]

I have a 36"x18"x18" glass tank. It's made of 1/4" glass is that thick enough? I had originally bought it for a sump setup so it would have been only half full. But now I'm debating wether to turn it into a full tank. I also want to know if I can move the centre brace, and just have thick bracing on the ends, so I can put one halide over the centre. thanks