Eaves Gutter Sizing

Particular reference should be made to the correct sizing of gutter.

Eaves gutter sizing.

Then use the information below to see what size gutter you need. You can also add additional or oversized downspouts to improve drainage if necessary. Downpipe eaves gutter long straight eaves gutters box gutter to rain water head box gutter vertical faces box gutter side o flow box gutter vertical o flow storm water pipe size storm water network overland flow path spitter upstream end custom rain water head. And the provision of appropriate overflow devices.

Total roof area also affects runoff. A rain gutter eavestrough eaves shoot or surface water collection channel is a component of a water discharge system for a building. The total rainfall and how rapidly it falls will affect the runoff from the roof. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

Roof drainage systems should be designed and detailed by a suitably qualified trade or professional in accordance with the bca and the australian standards. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. It is necessary to prevent water dripping or flowing off roofs in an uncontrolled manner for several reasons. The code limit is 150mm for dp s and 26 800 sq mm for flat eaves gutters the program will calculate the size and number of downpipes downspouts leaders required and the eaves gutter sizes for any roof.

An inch of rain is not much but it if falls in half an hour it could flood a gutter. Learn more how to storm water design for building sites. Quantity and placement of downpipes. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

A standard 5 inch k style gutter can handle annual rainfall for a majority of houses in most of the u s. 6 inch 7 960 square feet. 5 inch 5 520 square feet. Gather some basic weather information to calculate the proper size for gutters and downspouts for a house.

The eaves gutter selected is quad spouting with an effective cross sectional area of 6125mm 2 installed with a slope of 1 500. Determine downpipe size from table 3 3 in as nzs 3500 3 the minimum size downpipes compatible with spouting of 6125mm 2 cross sectional area installed at a 1 500 gradient are 90mm diameter round or 100 x 50. You can choose a downpipe size and calculate the number required and the corresponding eaves gutter 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.

Then use the chart below to see what size gutter you need.