Browse Forums Building A New House 1 Aug 02, 2009 11:26 pm Hi! This is my first post here, so please excuse me if this is a stupid question, or already been asked a thousand times!! We are about to start building our new home, we have gone with Coral (the Hamilton 252) but the block we have purchased hasn't yet been registered and the roads aren't quite finished, so we can't get Coral onsite yet to get the tender organised for another few weeks. We have been told by the developer of the estate (Mirvac) that the soil is M class. Is that any good? It's a 905 sqm block and almost dead flat (there is a slight rise up from the road, but the actual building area is almost level). There is a couple of trees that will unfortunatley have to be removed, but Coral have already told us that they won't do that and we have to organise it ourselves, which is fine, so we haven't allowed for that in the site costs at all. Coral have suggested around $20k for site costs (plus the removal of the trees), but when we told them it was M class, they said it could be marginally less than that. However, I was looking at the inclusions list tonight, noticed that they state the slab is suitable for S class soil. So, can anyone point me in the direction of information about soil classifications? How does M class soil rate? Thanks for any help!! Nic. Built the Coral Homes Hamilton 252 - moved in 20/10/2010 and loving it!! https://forum.homeone.com.au/viewtopic.php?t=27215 Re: Can someone help me out with soil classifications? 2Aug 03, 2009 12:08 am Hi Nic, this is just a guide "M" class is pretty common we had a combination of M & P due to some fill on our land, I pulled this info from our soil test hope it helps Cheers Lou Methods adopted are in accordance with guidelines specified in AS 2870 - 1996, appendix D. Potential surface movement and the resultant site classification are therefore in consideration of the local depth of the zone of consideration of significant soil moisture variations and the entire ground profile. This includes the influence of “reactive” clay based soils and/or the presence of fill, as well as the effect of “stable” materials such as dense sands or shallow rock. Site classification is divided into various classes, dependent upon the “Ys” (potential movement). Class are; through moisture change. "P" Problem sites which generally have soils associated with uncontrolled fill, mine subsidence, landslip, or soft or collapsing soils. "E" Extremely reactive sites can experience extremely high amounts of ground movement. Special considerations should be taken into account when building on these sites "H" Highly reactive sites, can experience a high level of ground movement. Additional costs are generally incurred in building on such sites. "M" Moderately reactive sites, can under go moderate ground movement through moisture change, May be considered as your average site. "S" Slightly reactive sites, have only slight potential for ground movement through moisture change. "A” Most shallow rock sites and some sand sites with little potential for movement through moisture change. ..........”*A”.......... http://take2-customdesigndownslope.blogspot.com 07-10-09 omg they have cut the block 14-05-10 we finally have the keys Re: Can someone help me out with soil classifications? 3Aug 03, 2009 12:46 am Hi, We are building the Hamilton 278. We had a soil type of M but a site classification of P (Problem). The problem was that we had rock not far underneath the soil so that made excavation for the slab more difficult. Other reasons for a P classification include tall trees near by and fill on the block. Being a P site maybe added about $5000 - i'd have to check our tender for the exact amount. M is a decent soil type to build on. H and onwards start to require low ****** slab support beams etc which adds a lot of cost. Coral use a screw pier system which is completely different anyway. Al & Caitie- Building the Hamilton 278 (Coral) at Narangba Re: Can someone help me out with soil classifications? 4Aug 03, 2009 8:29 am Another Coral builder here. Ours was M/P class and what Coral quoted us is pretty much what we paid. The P is because we already had a bit of fill on the land. Thanks for your reply. I will just wait and see I guess. Trying to get some more information from our builder. 9 11713 I am not sure whether Perth has its own way of doing things in regards to this. Most of Perth has class A (sandy soil), except for some areas near rivers or hills. 2 8256 We were lucky in that our old house was so small (86 square metres) compared to the new house, they were able to take enough readings around the old backyard house before… 8 24781 |