Box Gutter Sump Regulations

Installing box gutters to achieve compliance with relevant regulations.

Box gutter sump regulations.

Insufficient number of downpipes appropriate for the roof catchment area. Rainheads are an essential design element for buildings where internal box or trough gutters are used. Plumbing regulations 2008 part 2 r 14. A rainhead or sump is a container located between the gutter and downpipe that aids the flow of water away from the roof.

Saa snz hb114 1998 ci 3 6. Method for design of eaves gutter systems. A box gutter is defined as a graded channel generally of a rectangular shape for the. 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.

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. Inappropriate overflow provision to the sump rainhead. 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.

The side with the maximum flow is used to size the 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. Overflows in box gutter. In victoria the installation of box gutters is regulated plumbing work that must be carried out and certified by suitably registered licensed plumbers.

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. 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. As nzs 3500 3 2003 ci 3 7 5 1. Either a rainhead or sump.

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. It acts as an external overflow point to reduce water surges into the stormwater system and aid the flow of water down. Saa snz hb114 1998 ci 3 4. 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.