Standard Gutter Size Nz

The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website.

Standard gutter size nz.

It s important to note that your calculations should always be based on the size of the largest section of roof. This is an external gutter so using clause e1 figure 15 plot 38 40 m plan area on the. Gutters come in different sizes. Nz s leading provider of steel roofing guttering products for residential commercial customers.

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. 6 inch 7 960 square feet. 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. Made form galvsteel zincalume colorsteel.

You can also add additional or oversized downspouts to improve drainage if necessary. Gutters come in different sizes. 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. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

The largest plan area is area a at 38 m. Work out the minimum gutter capacity or cross sectional area required and use this to select the right gutter. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Gutter sizing step 1 determine roof area to be drained.

Gutter sizing guide gutter downspout sizing methodology. Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size. 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. A standard 5 inch k style gutter can handle annual rainfall for a majority of houses in most of the u s.

This ensures the gutter will have sufficient capacity for all other smaller roof sections on the building. 5 inch 5 520 square feet. Then use the chart below to see what size gutter you need. New zealand building code clause e1 figure 15.