Gutters will be the same size for all the roof so use the largest plan area to work out the appropriate size gutter.
Standard gutter size nz.
5 inch 5 520 square feet.
New zealand building code clause e1 table 5.
They can be 4 5 or 6 inches.
The largest plan area is area a at 38 m.
A standard 5 inch k style gutter can handle annual rainfall for a majority of houses in most of the u s.
This is an external gutter so using clause e1 figure 15 plot 38 40 m plan area on the.
6 inch 7 960 square feet.
Gutter sizing guide gutter downspout sizing methodology.
Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size.
Gutters come in different sizes.
Gutter sizing step 1 determine roof area to be drained.
Nz s leading provider of steel roofing guttering products for residential commercial customers.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
New zealand building code clause e1 figure 15.
For saf perimeter systems commercial gutter designers contractors and building owners this gutter sizing section provides 4 steps to properly size a commercial gutter downspout configuration.
Then use the chart below to see what size gutter you need.
According to this old house while 5 inch k style gutters and 6 inch half rounds are usually suitable for homes houses with big steep roofs or those located.
Gutters come in different sizes.
It s important to note that your calculations should always be based on the size of the largest section of roof.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
This ensures the gutter will have sufficient capacity for all other smaller roof sections on the building.
You can also add additional or oversized downspouts to improve drainage if necessary.
Now architects engineers designers and contractors can easily and accurately size downspouts and gutters according to the specifications in smacna s architectural sheet metal manual 7th edition 2012.
The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website.
