Browse Forums Paving & Concreting Re: Type of concrete design to be used ? 2Oct 13, 2009 2:49 pm Blog is now up - http://www.jbdave.blogspot.com/ Re: Type of concrete design to be used ? 4Oct 13, 2009 6:28 pm Where you are coming from is where you are going to... Re: Type of concrete design to be used ? 6Oct 13, 2009 6:49 pm Where you are coming from is where you are going to... Re: Type of concrete design to be used ? 8Oct 13, 2009 7:17 pm Where you are coming from is where you are going to... Re: Type of concrete design to be used ? 10Oct 13, 2009 9:33 pm Where you are coming from is where you are going to... Re: Type of concrete design to be used ? 12Oct 14, 2009 12:07 am Where you are coming from is where you are going to... Re: Type of concrete design to be used ? 14Oct 15, 2009 2:53 pm iTalk, I just reviewed your slab design to AS2870 (Residential Slabs and Footings). This is defined as a stiffened raft slab. Do you know the length or width of your house? The only thing that I can't verify against AS2870 is the beam spacing (thickening spacings). They should not be greater than 4.0m centre to centre. Therefore if your house is not greater than 12.3m wide or 28.3m long this should be fine (the added 0.3 is for the beams). Unfortunately the above means that any extra they are charging is not for this slab. There are other items that it could account for though: Do you have a slope on the block? - Extra excavation. There are other costs that may be beyond the "standard inclusions." The best thing to do is ask and point them to their inclusions, it may also be a mistake that might mean a change to your contract. I know that we managed to cut about $3,000 of costs that had been double counted by accident within our costing. Just read everything very carefully and if there is something that you don't understand ask here first then talk to the builder in an informed way. Good luck. View our blog at: http://room4acubby.blogspot.com/ there is only 20% difference in concrete strength between 20 mpa and 25 mpa, so check with your engineer first if it fits his calculation tolerances. There are ways to… 6 14570 Natural stone tiles like slate, travertine, and limestone add a timeless, elegant look to… 0 6391 |