Browse Forums Building Standards; Getting It Right! Re: NCC Volume 2 Rule 3.1.2.3 2Nov 04, 2016 12:08 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: NCC Volume 2 Rule 3.1.2.3 4Nov 05, 2016 2:02 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: NCC Volume 2 Rule 3.1.2.3 7Nov 05, 2016 11:16 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: NCC Volume 2 Rule 3.1.2.3 9Nov 05, 2016 1:35 pm 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: NCC Volume 2 Rule 3.1.2.3 12Nov 05, 2016 10:23 pm 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: NCC Volume 2 Rule 3.1.2.3 14Aug 08, 2022 7:24 am [quote="SaveH2O"]The way that I have always read it is that 3.1.2.3 is the minimum and that the slope can vary greater than the minimum if deemed appropriate. The slab's footprint and the surrounding topography should be factored when the site cut and slab is engineered but this is not always done to satisfaction. Hi there, I have been reading through the BCA guidelines and I haven’t been able to confirm the required angle for an outdoor area on the ground floor slab that is covered by the 1st floor slab. The two sliding doors out to this area have built in drains so there will be no step, however I’d like to confirm if I still need a 50 or 100mm fall in the first metre of the covered area if this area is 5 metres deep or is it within the last metre closest to the edge? Thank you in advance!!!! Re: NCC Volume 2 Rule 3.1.2.3 15Aug 08, 2022 1:59 pm You could always commission alternative solution if you have trouble getting OC 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: NCC Volume 2 Rule 3.1.2.3 16Aug 12, 2022 5:35 pm trooper56 Hi all As you will have seen already on this forum this topic has been beaten with a stick over and over again. I draw your attention to rule 3.1.2.3 of the NCC Volume 2 which states: Surface water must be diverted away from Class 1 buildings as follows: (a) Slab-on-ground — finished ground level adjacent to buildings: the external finished surface surrounding the slab must be drained to move surface water away from the building and graded to give a slope of not less than (see Figure 3.1.2.2)— (i) 25 mm over the first 1 m from the building in low rainfall intensity areas for surfaces that are reasonably impermeable (such as concrete or clay paving); or (ii) 50 mm over the first 1 m from the building in any other case. However, in the explanatory notes, the following is stated: The appropriate slab height above finished ground level and the slope of the external finished surface surrounding the slab may vary depending on: 1. The local plumbing requirements; in particular the height of the overflow relief gully relative to drainage fittings and ground level (to work effectively they must be a minimum of 150 mm below the lowest sanitary fixture). 2. The run-off from storms, particularly in areas of high rainfall intensity, and the local topography. 3. The effect of excavation on a cut and fill site. 4. The possibility of flooding. 5. Termite risk management provisions. Does this mean that the rule is subject to the discretion of certifying authorities? I only have 1 metre on each side of my house available and I would not like to slope the concrete pathway 50mm from the edge of the home to the boundary. I am happy to place ample stormwater run-off channel drainage along the pathway. Keen to hear your thoughts and experiences/expertise. Cheers Shanil I Think what you are proposing is better than the standards as long as the plumbing is done by a professional and can cope with a heavy downfall. Just sloping the concrete away from the house either dumps it on the ground next to your paving or dumps it on your neighbour both can have consequences. thanks guys! yes this is how I've exactly raised it with the builder. still awaiting response. 12 6026 Whats in the gap between the fence and the concrete? I assume dirt/plants etc, right? like youve shown in other parts of the pics. Im not sure how familiar you are with… 8 6034 go upvc window frames ensure insulation under colorbond. not just sarking, lighter color roof also not sure if you have seen this viewtopic.php?t=5823 last couple of pages… 4 110525 |