Box Gutter Sump Regulations

The side with the maximum flow is used to size the box gutter.

Box gutter sump regulations.

As an alternative the top of the rainhead may be installed so that it is no higher than 50 per cent of the flow depth of the box gutter consistent with saa hb39 installation code for metal roof and wall cladding section 5 clause 5 7 3 and figure 5 7 3 to prevent internal flooding or damage to the building or contents see figure 2. This free online box gutter calculator will calculate the size of box gutters and sumps with a side overflow in accordance with the australian plumbing code as nzs 3500 3 2003 part 3 storm water drainage. A box gutter is defined as a graded channel generally of a rectangular shape for the. Overflows in box gutter.

This has become a big issue in the past 18 months particularly in victoria and is outlined in a new section in the current update to the ncc. Saa snz hb114 1998 ci 3 4. Rainheads are an essential design element for buildings where internal box or trough gutters are used. Box gutters plumbers must install a box gutter system in accordance with as nzs 3500 3 as nzs 3500 5 hb 114 and hb 39.

It acts as an external overflow point to reduce water surges into the stormwater system and aid the flow of water down. As nzs 3500 3 2003 ci 3 7 5 1. Insufficient number of downpipes appropriate for the roof catchment area. In victoria the installation of box gutters is regulated plumbing work that must be carried out and certified by suitably registered licensed plumbers.

Each box gutter run must discharge independently to ether a sump or directly out of the building without changing the size of the gutter or changing direction. With building design being so restrictive on space these days this is the area where designers must think about how the roofing contractor will make the box gutter comply. Vba openly disclose that they do not use the bca code as it believes their regulations are far more thorough and make construction in victoria of a better standard for the. Inappropriate box gutter size for the roof catchment area.

This free online box gutter calculator will calculate the size of box gutters and sumps with a vertical high capacity overflow in accordance with the australian plumbing code as nzs 3500 3 2003 part 3 storm water drainage. Plumbing regulations 2008 part 2 r 14. Architects draftpersons builders and other. Method for design of eaves gutter systems.

Installing box gutters to achieve compliance with relevant regulations. Ensure that the overall design and installation will be compliant with relevant regulations. Inappropriate overflow provision to the sump rainhead. The total flow is used to size the sump and overflow.