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Hi @Davofit,
Those 175 x 150mm brackets, unfortunately, aren’t going to be long enough to properly support a 600mm deep benchtop. They’ll take some of the weight at the rear, but you’ll need extra support at the front corners to stop sagging or pulling away from the wall over time. A common way to do this is to fix the larger brackets at the rear into studs where possible, then add a smaller angle bracket from the front corner of the benchtop to the adjacent wall to give it that extra stability. If there is no wall mounting point present, you'll want to run a vertical section of benchtop (or a panel cut from the same material) underneath at the corner to act as a leg and carry the load. That combination of rear brackets, corner support, and a vertical leg section will give you a sturdy installation without needing to reinforce the panels themselves.
I've created a rendering below to illustrate.
The only real alternative would be to use very large stayed brackets, such as the Carinya 600 x 450mm Galvanised Heavy Duty Straight Stay Bracket.
If you can draw us a sketch or take a photo of the area and indicate where the bench top and shelves are going, our members might have some other suggestions.
Please let me know if you have any questions.
Mitchell
That certainly makes a difference, @Davofit. In that case, as long as you have a few brackets along the length, then they would be capable of holding a 300mm wide bench.
The shelves are designed to work as is. I don't see any need to reinforce them.
Mitchell
