How to build a concrete outdoor island bench?

[damianpc]

Hi. 

We are looking at building an outdoor island bench with a concrete top, poured in place. The island is not directly exposed to weather but could cop a bit, depending on the severity/angle of the weather. 

The bench will be roughly 2m L by 1m deep. Concrete top may overhang on the rear side. 

I have 2 questions:

-1) If built sturdy, will a timber frame support sufficiently a concrete top, about 3/4cm thick? As i'd prefer to build the frame from timber as opposed to brick. 

-2) We are wanting to clad in something like James Hardi stria panelling. What is the best method to prevent moisture getting inside to the frame? And what to build the frame from, to assist with this. Treated pine?

Thanks in advance. 

[Dave-1]

Morning @damianpc 

Nice sketch I dont see a problem with making that up yourself. Tho one suggestion I will make is that once made you put the concrete bags (un-used) on top of the frame work and then see fow solid it feels. Just a precaution and I would do the same with a frame I was building. I did it with my Bench seat Yeah threw myself at it and flopped at the points that wernt supported by wheels just to test it I figure if you can stress test it and it passes then its go ahead time. Just rem someone will also be sitting on the table several times over the lifespan of it BBQ's are BBQ's

Dave