Browse Forums Owner Builder Forum Perri You are correct, my math was wrong at 5am this morning with no coffee! I have now fixed the formula. I also think your figures of $100-200/sqm including… 6 6582 ![]() Thanks Simeon, that's very helpful. I've edited my post to add imgur links. I've given a snippet of the slab engineering plan. Could you have another look please? Yes… 2 400 You are correct. Just read through all the ncc rules and 75mm is the minimum requirement for me. 4 28470 |