This has led to the historically rather confusing use of a safety factor of 2 by using 200mm hr instead of 100mm hr as in new zealand the maximum rainfall for internal gutters.
Gutter dimensions nz.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
When you are completing a gutter replacement the first point to note is that gutters come in different sizes.
With clean bold lines and a high face.
Marley spouting is nz designed and manufactured for nz conditions.
727 litres min or 616 litres min minimum recommended fall.
Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
Effective cross sectional area with 15mm free board.
5 inch 5 520 square feet.
Gutters will be the same size for all the roof so use the largest plan area to work out the appropriate.
Large sized gutter for commercial and industrial applications.
They can be 4 5 or 6 inches.
1 500 2mm in 1m minimum downpipe.
Nz s leading provider of steel roofing guttering products for residential commercial customers.
All dimensions given are nominal.
Flow capacity 363 litres min minimum recommended fall 1 500.
New zealand building code clause e1 figure 15.
The basis for establishing the gutter size used in the cop was on cubic capacity using the martin and tilley work not on width although a recommendation is made that the.
What size of marley spouting and downpipes do i need.
Made form galvsteel zincalume colorsteel.
For extreme conditions where a bold look is desired.
33 550mm or 29 400mm g 600mm flow capacity.
About a popular rainwater system solution that is predominantly used in residential applications.
Then use the chart below to see what size gutter you need.
Box gutter 125mm conceals the sheet ends at the eave line and looks great with profiled longrun sheeting or tile roofing internal and external brackets are available in this profile and it is suitable for use with fascia 185 fascia 155 and fascia 135.
Dimond box 175 gutter allows rainwater or snow to be drained quickly and because of its large size it is also easy to clean out.
All dimensions given are nominal.
They don t corrode or rust and are ideal for coastal areas with salt laden air.
6 inch 7 960 square feet.