Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
Formula to calculate gutter size.
To limit the effects of thermal expansion in gutters 50 ft.
Water pipe size calculator information video water pipe size calculators size every pipe in your project in seconds with just 3 clicks.
6 inch 7 960 square feet.
Overflow calculator for eaves gutters.
Enter larger gutter widths in the yellow boxes to find out how wide your gutters need to be given the length that you want to go between downspouts.
Commercial roof structures can be complex consisting of many areas shapes and configurations.
Calculate the area of a roof to work out how much guttering is required.
When selecting and.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
Then use the information below to see what size gutter you need.
Roof length x half roof width x roof height 2 roof area.
Downspout sizes must not exceed the bottom width of the gutter.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
5 inch 5 520 square feet.
Gutter sizing step 1 determine roof area to be drained.
Simplified app for android phones.
There are two things you need to know.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
Adding additional downspouts will require less gutter and downspout volume resulting in smaller gutters downspouts.
15 m is a practical maximum gutter length to be served by a downspout.
5 inch 5 520 square feet.
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.
The simple way to calculate gutter sizes.
An inch of rain is not much but it if falls in half an hour it could flood a gutter.
Remember two gutter lengths can share the same downspout so if you calculate the max gutter to be 40 feet you could put a downspout halfway in an 80 foot length.
Please lower the maximum spacing between downspouts to see this effect.
The capacity of a sloped rectangular gutter may be approximated by using a gutter cross section area not less than that of a semicircular gutter and.
Downpipe and eaves gutter calculator valley gutters generic rain water outlets for flat roofs.
To calculate the effective roof area you should use this formula.
The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website.
Gather some basic weather information to calculate the proper size for gutters and downspouts for a house.
Total roof area also affects runoff.
So for a roof that is 5 m long with a height of 4 m and the.
The gutter and downspout size required is highly dependent on the amount of gutter and the spacing of the downspouts.
Gutter sizing step 4 calculate water handling capacity for gutter downspout options.
Minimum top opening width max.
