Stand design for 90 gallon Opinions/recommendations please

[stubb86]

So im wanting to build an oversized stand for my 90 gallon to hold a 40 gallon sump. Below is a pic of the size that i have planned out.
I was thinking last night that the weight of the tank is not going to be on the top frame of the stand but the pice of 1/2 plywood that will be on the top.
i have one center brace planned in the drawing but would i need to add a few more for it to be safe?

any input would be appreciated.

 

[bearjohnson]

Yes I would. The cost a few pieces of wood to add them is nothing.

What I would strongly recommend in doing this is to use 3/4" plywood on top instead of 1/2".

Also I would buy 2x4 joist hangers Simpson Strong-Tie Z-Max Galvanized Double Shear Hanger-LUS26Z at The Home Depot at Home Depot or Lowes and use them as your supports for your cross pieces instead of relying on just nails or screws.

 

[stubb86]

The top piece is 2x6 would i need to use 2x6 as the cross pieces or could i use 2x4s?

 

[JMSKI333]

Here are some photos of my stand that I built for my 90g. It is built 100% out of 3/4" oak plywood and 3/4" pine boards. My top is 2x 3/4" pieces of plywood glued and screwed together. It has been up and running for over 4 years now. I would recommend you use at least 3/4" plywood for the top of your stand. 1/2" is only 3 ply in most cases and very weak. I hope this helps.

It also wouldn't hurt to have more center braces than needed and just make them removable so you can move big items in and out.