Box Gutter Sizes Australian Standards

This free online box gutter calculator will size box gutters and rain water heads in accordance with the australian plumbing code as nzs 3500 3 2003 part 3 storm water drainage.

Box gutter sizes australian standards. Particular reference should be made to the correct sizing of gutter. Must have a constant slope between 1 40 and 1 200. Examples of box gutters are shown below. The gutters downpipes and overflow gdo calculator assists in developing a better understanding of the ncc volume two part 3 5 3 gutters and downpipes acceptable construction practice acp provisions.

The building code. 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. But can be used for anywhere in the world provided you know the rainfall intensity requirements for your local area. Have a minimum depth of 75mm at the high end.

Down pipe must be vertical from sump not to the side minimum sump length is 400mm. The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep. Sides must be vertical. The building code of australia bca changes each year so it can take time to keep up to date with the requirements that apply to new homes and renovations.

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. The videos show some of the key changes to the national construction code ncc vol 1 and 2 as well as changes to the australian standards. But houses with big steep roofs or those located in climates prone to heavy downpours may need wider gutters and extra downspouts to keep rainwater from overflowing. 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. Roof drainage systems should be designed and detailed by a suitably qualified trade or professional in accordance with the bca and the australian standards. To use the gdo calculator enter information about the location roof design and types of overflow measures. And the provision of appropriate overflow devices.

Box gutters must be straight no bends. In addition to referring to australian standards as nzs 3500 3 2003 and as nzs 3500 5 2000 the bca also contains requirements for the disposal of surface water in volume one in performance requirements fp1 2 and fp 1 3 and in volume two in part 3 5 2 namely performance requirement p2 2 1 and clauses 3 5 2 1 and 3 5 2 4.