Browse Forums General Discussion Re: Has anyone rectified slab heave successfully 4May 19, 2013 11:27 am 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Has anyone rectified slab heave successfully 6May 20, 2013 1:29 pm Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Has anyone rectified slab heave successfully 11Apr 09, 2014 8:17 pm Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Has anyone rectified slab heave successfully 13Apr 10, 2014 10:06 am http://camdenbuild.blogspot.com.au/ by invite only please pm me Re: Has anyone rectified slab heave successfully 16Apr 10, 2014 1:43 pm Robbie 55, having a competent and experienced structural engineer is the first major hurdle. Whether you know one or a builder who uses the same guy to design their jobs and you can check previous work is another good step. We were lucky in that all our work was done by the same firm for quite a few years - old school who had been there and done that on a lot of different type of sites over forty years. From what I've read in Victoria a building designer can call up a standard slab design depending on the soil type but I could be wrong ? In NSW as far as I know every DA has to have engineers drawings as part of the CC which has always been the case going back a long way. Tailor made drawings for each house sounds like a way better solution to me. Quote: Is it just the thickness/reo/MPa? Kind of but they have to take into consideration things like point load, where the upper storey rests on the ground floor walls etc too so each slab is pretty much designed from scratch although I'm sure in a lot of cases they have stock drawings that just get altered a bit. Stewie Re: Has anyone rectified slab heave successfully 17Apr 11, 2014 10:21 pm qebtel Not that I am querying Adam.M's authenticity, but it would seem if this is true, that one should just do a raft slab whenever on a H soil? But I am aware that plenty of waffle pods are going down on is H+ sites, even when they are on the low side of the road, and beneath the level of the road. Why is this? Just cost? Wow this is digging up an old post! First of all I am not a structural engineer. My knowledge only goes as far as reading through AS2870, researching and talking to actual structural engineers. From my search, I have heard many different view points. From what I have gathered is this:
- The reality is, it doesn't take much to incorrectly install a waffle pod - A raft slab is much more forgiving - A raft slab takes a few more days and many $1,000's extra - Consumers want a cheaper deal and builders give them what they want! If you read AS2870 in it's entirety and the CSIRO's guide on slab maintenance, you will see that not many houses comply. Eg. next doors house that sits 400mm under my house's level, built using a waffle pod with no fall what so ever. All in all, not everyone will agree with my statement. But as I said, I have heard engineers on both sides and it seems they can't even make up their own minds! Re: Has anyone rectified slab heave successfully 18Apr 11, 2014 11:47 pm Adam.M qebtel Not that I am querying Adam.M's authenticity, but it would seem if this is true, that one should just do a raft slab whenever on a H soil? But I am aware that plenty of waffle pods are going down on is H+ sites, even when they are on the low side of the road, and beneath the level of the road. Why is this? Just cost? Wow this is digging up an old post! First of all I am not a structural engineer. My knowledge only goes as far as reading through AS2870, researching and talking to actual structural engineers. From my search, I have heard many different view points. From what I have gathered is this:
- The reality is, it doesn't take much to incorrectly install a waffle pod - A raft slab is much more forgiving - A raft slab takes a few more days and many $1,000's extra - Consumers want a cheaper deal and builders give them what they want! If you read AS2870 in it's entirety and the CSIRO's guide on slab maintenance, you will see that not many houses comply. Eg. next doors house that sits 400mm under my house's level, built using a waffle pod with no fall what so ever. All in all, not everyone will agree with my statement. But as I said, I have heard engineers on both sides and it seems they can't even make up their own minds! I agree with you Adam.m I think it will be sorted out in court and the main arguments will be who is responsible for drainage . is it the builder ,did they follow the engineers drainage design ? is the engineers drainage design adequate , did it comply with AS2870 ? is it something the owner has done regarding drainage ? I my opinion builder and engineer will carry the responsibility and the builder taking the largest load. Re: Has anyone rectified slab heave successfully 19Apr 12, 2014 1:19 pm To answer OP question, I have been a builder for over 40 years and I don't know how to fix a slab heave. The reason is that when soil heaves up due to ingress of moisture is that it will stay up even after it dries out. It seems that in domestic construction the loads are not enough to push soil back down. In my reports I have recommended partial demolition and reconstruction of slab to get down to designed levels. It would be interesting if anyone else has different experience. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Has anyone rectified slab heave successfully 20Apr 12, 2014 3:07 pm I think it is a bit of the old locking the gate after the horse has bolted unfortunately. Once it has happened I don't think it can be easily fixed. Mostly it appears that the site drainage has a much bigger impact on this occurring than most builders and clients think. I wonder how these guys are going to cope in the future viewtopic.php?f=19&p=1161877&sid=1d065577add46708c5234806432739cb#p1161877 Stewie Hi All, we are starting to think of building with Masterpiece Builders in Victoria, has anyone had any feedback or experience with them 0 13469 Hi we are looking to talk to people who have built with them recently. We have signed mid range built contract but identified that a lot of things are not included.… 0 630 I work with owner, he/she is my man on the ground and I instruct them when to visit the site and take photos and I have other tools in the bag. 4 15020 |