How to DIY a weightlifting platform and which type of plywood to buy?

[bilcruise]

Hi,

I am thinking to build a weightlifting platform for my garage gym, something like this.

As you can see the bottom layer is built by about 2 x plywood.

I went to bunnings website and not sure which plywood to purchase. The thickness is also a bit strange, I couldn't find one that is an integer number, e.g. 10mm or 20mm or something. The reason is that I want to put a rubber gym mat on the sides, just like the one in the photo and usually the rubber gym mat has a thickness of 10 or 15mm.

Any advice on this?

Also, would like some suggestion on which drill I should purchase to put screws on the plywood.

Thanks a lot!

[MitchellMc]

@bilcruise,

Sorry, the air pockets I referred to would be in the adhesive if it wasn't applied correctly.

The combo of mat, timber, mat, sounds like a good idea and would likely protect the tiles much better than simply a mat on plywood.

Mitchell