The 6 in 12 pitch factor 1 1 multiplied by 1 000 yields an effective area of 1 100 square feet.
How to determine a gutter angles on a house.
If a gutter angle is introduced into the rainwater gutter run the effective gutter capacity will be affected and an adjustment must be made to the maximum roof area which each rainwater system is capable of draining see code of practice.
Once a flow rate has been determined use tables 1 2 below to select the required gutter profile.
Use this handy guide to help you calculate gutter size and determine what size gutters are the best for your home.
Find the width of the gutters.
Determine the 5min 20 year ari for the locality.
Carefully climb up the ladder and measure the width of the opening at the top of the gutters.
Attach the level string to the opposite end of where the gutters will be installed.
Gutters typically come in 5 or 6 in 13 or 15 cm sizes and can be k style or half round place a sturdy 20 ft 6 1 m ladder on 1 side of your house so that you can reach the gutters.
Multiply the number of feet by 1 16 inch to determine the total slope the gutter requires.
Use a string level to ensure the string is completely parallel to the ground.
The minimal slope needed for proper gutter drainage is 1 25 cm 1 4 inch for every 3 metres 10 feet of gutter.
To get started measure the side of the house directly under the gutter to determine its length in feet.
The gutters are attached to one or more downspouts which carry water to the ground.
A house in chicago has a roof whose actual drainage area is 1 000 square feet.
To calculate gutter slope attach one end of a long piece of string to the highest point of your gutter and the other end at the location of your downspout.
Then fasten one end of the string at the highest point of the gutter and the other at the spot where the downspout will be.
Downspouts are usually placed near a corner of a house at the steepest angle to allow runoff.
The eaves gutter selected is quad spouting with an effective cross sectional area of 6125mm 2 installed with a slope of 1 500.
For example if the gutter is 16 feet long the end near the down spout must be 1 inch lower than the starting end.
Design example of house plan.
First determine the location of each one of your downspouts.
You may also move between the boxes by using the tab and shift tab key.
Effective area of gutters.
Measure the length of the string to determine the distance between the two points.
How to determine gutter slope.
They are designed to keep water away from the side of the house.
Calculate the gutter slope by dividing the length of the gutter needed by 10.
Measure the length of gutter needed.
Select eaves gutter and gutter slope.
The best way to calculate the slope of a gutter run before hanging it is to use a long string and a string level.
