Browse Forums General Discussion Re: Do I really need an agi pipe? 8Mar 30, 2013 12:58 pm An ag pipe sits under the dirt, is surrounded with gravel and then is covered with soil. The ag pipe itself will have a "stocking" Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: Do I really need an agi pipe? 9Mar 30, 2013 2:16 pm Interestingly many drainage pipes that 'leak' draw sand and soil from under a concrete structure. This can lead to a condition called 'sand jacking'. Sand jacking is where sand is compacted further down the line and jacks up concrete. You will have seen thison many occasions without knowing it. ie where a foot path with no trees near by amazingly and miraculously become higher than the preceding or following panel ( slab). A substitute is always a substitute and compromising a site well never be an exact science. IMHO Where you are coming from is where you are going to... Re: Do I really need an agi pipe? 11May 29, 2013 9:26 am I have seen so many ag drains silt up and become useless. There are alternatives that won't silt up but the subject is complex. The BCA says grade the soil away from the house, but if anyone does do that, the slope will not remain intact for long. cheers Re: Do I really need an agi pipe? 12May 29, 2013 12:09 pm leighton The BCA says grade the soil away from the house, but if anyone does do that, the slope will not remain intact for long. Regardless, the BCA regs require a 1:20 slope over the first metre and it must be provided. If the homeowner wants to regrade it later, the consequences are then their problem. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. do not pay until you are satisfied with workmanship windows require flashing over the head archithrave and up under weatherboards 3 25312 OK it's been a little while! I've been busy getting time where I can to work on this. I started by grading a pad (borrowing a… 26 17380 yep sounds good make the footing bigger to to allow for the pipe in the middle 3 5291 |