At 1 880 gpm s we will need 8 downspouts to handle the rainfall 1 880 260 8 downspouts rounded up.
Box gutter measurements.
Measure your gutter across the top from the back where the gutter meets the home to the outer edge.
Commercial box gutter material weight and thickness 0 027 aluminum 6 gutter a dimension is 5 due to coil width.
For design purposes and aesthetics let s assume you have selected an 8 gutter.
See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.
Find the width of the gutters.
Box gutter gradients shall not be flatter than 1 200 for sole widths equal to or less than 600mm wide.
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.
Metal corrosion issues all gutter and components must be the same to prevent electrolysis or electrical corrosion.
Five inch k style gutters or 6 inch half rounds the most common residential sizes are able to handle the rainfall on most houses in most parts of the country.
Also assume our guttered eave is 335 linear feet.
This will give a sump depth about 150mm.
Carefully climb up the ladder and measure the width of the opening at the top of the gutters.
The depth shown of the box gutter is the depth at the upstream end.
Learn more how to storm water design for building sites.
5 inch standard k style gutter shop 5 gutterbrush.
Deviations from the gradient must be smooth and prevent towards the outlet without a proportional permanent ponding.
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.
Choose an available dp size or any other size and enter that for the calculation of the sump.
If you are unsure if your building is going to have too much runoff for the 6 inch then sizing up might be your safest choice.
7 inch box gutters this is the middle of the box gutter sizes meaning that it is meant for commercial buildings that are larger than what the 6 inch can handle.
As a general rule egutter recommends for roof areas that exceed 2800 square feet a 6 k style size with a 3 x 4 downspout size would be appropriate.
The suggested down pipe diameter is shown for reference purposes only.
But houses with big steep roofs or those located in climates prone to heavy downpours may need wider gutters and extra downspouts to keep rainwater from overflowing.
