Box Gutter Sump Regulations

Sizes the depth shown of the box gutter is the depth at the upstream end.

Box gutter sump regulations. State of victoria victorian building authority 2017 published june 2017. Box gutters must be straight no bends. Must have a constant slope between 1 40 and 1 200. 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.

Trial box gutter width the minimum width allowed for domestic projects is 200mm. The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep. Have a sole width which is not reduced discharge at the downstream end without. Have a minimum width of 300mm for commercial installations 200mm for domestic installations.

Overflow devices need to discharge to the atmosphere in such a way as to prevent damage to buildings and property. This will prevent water damage in the event of gutters overflowing either due to high rainfall or a blockage. For commercial projects the minimum allowable width is 300mm. Experiment with this figure to get the depth of box gutter you require.

Down pipe must be vertical from sump not to the side minimum sump length is 400mm. Read more about compliant guttering options what does it mean for installers. For the associated box gutter outlet. However any width can be entered.

Sumps are to be appropriately sized in accordance with as nzs 3500 3 with a minimum length of 400 mm and when fitted with a high capacity overflow device with a depth of not less than 150 mm when either one or two box gutters enter the sump. Vertical faces enter the full vertical face area.