Box Gutter Regulations Nsw

Understanding the ncc gutter and downpipe provisions for housing includes information for building designers hydraulic consultants plumbers builders and other onsite trades about the selection and installation of gutters and downpipes including overflow measures.

Box gutter regulations nsw.

This will prevent water damage in the event of gutters overflowing either due to high rainfall or a blockage. Required gutter slope 1 40 to 1 200. For commercial projects the minimum allowable width is 300mm. High front guttering advisory committee report in 2010 the high front guttering advisory committee was established to investigate concerns that high front guttering products and installation techniques may be.

The regulations require that guttering has allowances for water to overflow gutters in a way that does not cause water to flow back into the structure. Box gutters allowable width slope and length. This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg. The depth shown in the calculations is at the upstream end.

You do not want to put extra pressure on the system. Code box gutter requirements the minimum width allowed for domestic projects is 200mm. A box gutter must be installed with a fall not less than 1 100 and be designed in accordance with the joint australian and new zealand standard as nzs 3500 3 or section 5 of as nzs 3500 5. There is always some confusion as to how the slope affects the overall depth.

Always check the measurements of your building and work out exactly how much downpipe will be serving each gutter. Rainhead overflow or specific box gutter overflow must be at least 30mm below the height of the back of the box gutter. Box gutters must be straight no bends. Minimum width 300 mm for commercial construction and 200 mm for domestic construction.

Pre manufactured gutter mitres and gutter angles for many guttering profiles reduce the need for creating mitres on site therefore simplifying the installation. Downpipes should not serve more than 12 metres of gutter length for each downpipe. Stratco gutters are strong yet lightweight making them easy to handle. All domestic box gutters must be a minimum of 200mm wide and 75mm deep.

In victoria the installation of box gutters is regulated plumbing work that must be carried out and certified by suitably registered licensed plumbers. Plumbers must install a box gutter system in accordance with as nzs 3500 3 as nzs 3500 5 hb 114 and hb 39. There is detailed government legislation regarding the design installation and maintenance of guttering.