Box gutter outlets must discharge through either a rainhead or sump.
Minimum gutter fall victoria.
Different styles of gutter known as profiles are produced.
A box gutter is a deep gutter which is concealed within the structure of the roof.
Maximum allowable length between expansion joints with one end fixed.
Old goat join date oct 2006 location tallahassee fl usa age 78 posts 316.
To achieve a 1 80 fall the code of practiceread more.
Water doesn t respect national.
This applies whether the waterproofing is a polymeric single ply membrane a reinforced bitumen membrane or another type listed in bs 6229 2018 the code of practice for flat roofs with continuously supported flexible waterproof coverings.
Dimension x not greater than downpipe size see clause 5 3 3.
Roof drainage systems should be designed and detailed by a suitably qualified trade or professional in accordance with the bca and the australian standards.
Standard here is 1 inch per 20 feet.
Layout box gutters must.
Have a minimum width of 300mm for commercial installations 200mm for domestic installations.
About 25mm per 6m.
A maximum 12m gutter length served by each downpipe is to ensure effective fall and adequate capacity to discharge all water anticipated during a heavy rain period.
Particular reference should be made to the correct sizing of gutter.
The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep.
Overflow sump and gutter support have been left out for clarity.
The depth shown in the calculations is at the upstream end.
The recommended minimum fall for a flat roof is 1 80 0 72.
Quantity and placement of downpipes.
Or 42mm per 10m.
For the best results i use 12th sep 2007 01 06 am 3.
Overflow box gutters must have independent overflow provision discharging to the atmosphere.
B be located as close as possible to valley gutters and if the downpipe is more than 1 2m from a valley provision for overflow must be made to the gutter.
And the provision of appropriate overflow devices.
Required gutter slope 1 40 to 1 200 there is always some confusion as to how the slope affects the overall depth.
Have a minimum depth of 75mm at the high end.
Simplified suitable for flattish roofs with little or no vertical faces or steep roofs draining to one side of box gutter only or any roof if you are in a hurry and make the necessary allowances for all catchments.
The outlet must be no further than the diameter of the outlet to the centre of the outlet.
Box gutter with rain water head at end of box gutter.
