Browse Forums Owner Builder Forum 1 Jan 12, 2011 8:51 pm Hi, wondering if anyone could give me some suggestions on what would be the best way to demolish the suspended slab below in the photo. Measures about 4m x 1.5m. The slab is suspended on corregated iron with reo mesh in it and is about 150 - 200mm at some parts thick. It is also butted up against existing brickwork and house which is staying and we dont want to do too much damage. We have managed to remove the end part as it was an extension but the rest is a lot harder. Have spoken to couple of people. One person said to hire a concrete saw from Kennards. Another said jack hammer. Any suggestions is appreciated or would be better off paying someone to do this? Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Demolition of Suspended Slab - Help 2Jan 13, 2011 1:10 am Hi Bendo, i recon the person u need advice from is young Onc-artisan - ur'll see some pics of him pouring a good slab at kayandandy build. he recons he's old, never shows his face - a bit like "the stigg" of the construction industry - he's got a funny idea of old cos he's never met me anyway PM him as he knows a lot about concrete & i'm sure he'll have a suggestion or 2 about knocking it down. cheers T&V Re: Demolition of Suspended Slab - Help 3Jan 13, 2011 1:17 am A concrete saw will be the safest way to deal with it as there will be no possibility of damaging the surrounding area you want to retain. If you cut through the slab around the perimeter of the area you want to remove so as to separate it from the retained section then you can go about dealing with the demolition without fear of causing damage where you don't want it. Reinforced concrete is hard to deal with as even if you use a jack hammer to break the concrete up into smaller bits it still hangs together on the reo. You either need to jack hammer and expose the reo and then cut through it with a gas ax or angle grinder, or use the concrete saw to cut the entire slab into manageable pieces. If you plan to clear the whole area I'd be tempted to hire a saw then cut the slab up, then get a bobcat and truck in to clear it away and level the site. It may cost slightly more for the bobcat but time is money and they'll do in an hour what it will take you an entire weekend to do. Your back will thank you. I'm a little curious about what exactly is holding the floor up. Does the slab extend under the walls that you want to keep or does it look like it was poured after the walls were built? You may need to be careful if the slab is just hanging there and you do cut it up. The last thing you want to do is cut through it only to have it drop and cause damage to you the saw or your house. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Demolition of Suspended Slab - Help 4Feb 03, 2011 2:39 pm Thanks for your suggestion, in the end we hired a concrete saw and did it in blocks. It was slow work but we got there in the end. We put the blocks into a skip bin so all in all not too bad except for a sore back and arms. Fair Trading can issue orders to rectify and complete but once the matter goes to NCAT these orders are automatically vacated. You will have to terminate contract and sue… 21 29759 How are you doing Ben? Extremely interested in hearing what you are doing or plan to do! 12 15175 We had this happen to us last year and got charged a variation. Try and give away as much as you can that is usable to charity otherwise if you are in Sydney I have a… 1 4508 |