Standard Gutter Size Nz

New zealand building code clause e1 figure 15.

Standard gutter size nz.

The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website. 5 inch 5 520 square feet. 6 inch 7 960 square feet. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

Gutters will be the same size for all the roof so use the largest plan area to work out the appropriate size gutter. Nz s leading provider of steel roofing guttering products for residential commercial customers. The type of gutters you buy and the size of the gutter pieces you buy should be able to handle all the rain your home gets in a year. It s important to note that your calculations should always be based on the size of the largest section of roof.

Then use the chart below to see what size gutter you need. Made form galvsteel zincalume colorsteel. If a roof s various drainage areas call for different size gutters go for the biggest one k style. Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size.

New zealand building code clause e1 table 5. A standard 5 inch k style gutter can handle annual rainfall for a majority of houses in most of the u s. They can be 4 5 or 6 inches. This is an external gutter so using clause e1 figure 15 plot 38 40 m plan area on the.

Gutter sizing guide gutter downspout sizing methodology. Gutter sizing step 1 determine roof area to be drained. 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. Gutters come in different sizes.

The largest plan area is area a at 38 m. You can also add additional or oversized downspouts to improve drainage if necessary. 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. This ensures the gutter will have sufficient capacity for all other smaller roof sections on the building.