Browse Forums Building A New House 1 Jan 23, 2019 3:41 pm Hi All, I live in Perth in the Hills and am building a new house on a subdivision. The shire want all storm water retained on site however it is clay with 800mm of fill and won't take soakwells, hasn't got a shire drainage I can plum into and the block is sloping away from the road. I've been told I need a civil engineer to design a system to put to the shire for approval. Has anyone had this scenario. Thanks in advance. Re: M class soil/clay and drainage 2Jan 23, 2019 8:11 pm I know of people who bought a block on the low side of the road and when their housing plans were lodged for approval, the council planners directed all stormwater run off had to go into a retention tank and then get pumped back up to the road. It cost this young couple approx $14k to get this done. Re: M class soil/clay and drainage 5Jan 25, 2019 10:15 pm Hi Kevin 1, if your using a builder they would (or maybe I say SHOULD) price the stormwater engineering as part of the scope of works, don't go to a civil engineer, someone like Structerre or Enginuity Engineering can do that for you, and won't cost a huge amount. Re: M class soil/clay and drainage 6Jan 25, 2019 10:51 pm Thanks for the references Doozer, I'll get in touch with them. I'm trying to save on site works and am still getting quotes through a building broker at the moment, however it was prompt engineering who did the soil testing and reckoned a civil eng needs to look at it. Rather than it be over engineered I'll try your suggestions. Thanks I've dug some footings to embed a post anchor into. My holes are around 450mm deep which I'll put a 200mm stirrup into. The bottom of these holes seem firm enough. … 0 3443 I donβt think so as the floor area over 300 square meters then it is class 3β¦. 12 18055 The Soil classification has little to do with piers. The purpose of the classing of the soil is to identify the clay content and the "average expected range of movement… 2 9989 |