If you want to build a shed garage or other similar type of building then 4 to 6 is a preferable pitch type.
Garage pitched roof construction.
This shows the existing extension fitted with a flat roof which was probably in excess of 20 years old.
The simplest way to replace the flat garage roof with a pitched roof is to use prefabricated roof trusses.
Minor repairs had been made over the last 3 or 4 years to repair rotten chipboard.
Medium pitched roofs most roofs in america follow these dimensions where pitch range is kept between 3 to 7 1 2.
If it is a pitched roof or if you plan to build a room above the garage with a pitched roof in the future the requirements will be different than if you are dealing with a flat roof with less than 10 degrees of pitch.
In the end most of the front view of the roof had rotted away which resembled the bottom of a rabbit s cage.
You should put a truss over every second joist.
Measure the width of the garage to know how long you need them to be and count how many joists there are along the length.