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Thanks everyone.
In summary, basic frame made with 50x50x2mm Duragal SHS (with extra coat of paint). It will be connected using prefab connectors and Tek screws (not smart enough to weld). Basic sketch, not all members shown.
Cladding something like composite panels (similar to Luxapanel).
50mm concrete benchtop with 15mm Hardie Panel compressed sheet.
Area is covered, but can get a little wet on all four edges.
Threaded tube inserts with levelling feet (304SS) rated for 300kg each.
Hello @Paolo1
Looking at your sketch I would hazard a guess that your concrete benchtop when joined together will possibly weigh 400++ kilograms. Your choice of using SHS is ideal, but I suggest engaging the services of an engineer or draftsperson to draw up a steel frame that will hold the combined weight of the concrete benchtops. I also recommend engaging the services of a welder to join the SHS for maximum strength.
If you have any other questions we can help with, please let us know.
Eric
Hi @Paolo1
"It will be connected using prefab connectors and Tek screws"
Just an amateur's thought Paolo - but I think that would be a disaster waiting to happen. I have seen Tek screws sheared between steel plates.
Welding would be my recommendation as per @EricL based on the weight values estimated above.
I even think 50mm may look spindly and flex.
Your schematics above aren't to scale, but I like the proportions, so I was thinking four 100mm square vertical members connected with eight 90mm square members which gives a good 360mm weld around the edges with no weld protruding.
Talk to a steel fabricator and get their opinion and costs.
Powder coat?
That's 50mm under the measuring tape - 100m vertical - 90mm horizontal.
Cheers! Keep us posted!
