The run or the base number is 12 inches.
Sloped roof to truss.
A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof.
A flat roof has a slope of 2 in 12 or less.
That is the roof s rise.
There are two main categories of roofing.
Measure the outline of the structure to be roofed with a tape measure or get dimensions from a house plan.
The maths behind this number is that it is the square root of rise run 2 1.
The rise will be the elevation change over the 12 inches.
A king post then runs from the apex to the centre of the tie beam.
Use prefabricated mono trusses for the easiest and best framing on a single slope roof.
A mono truss roof allows for more sunlight and visual space proper drainage and relatively cheaper.
A mono truss is a one sloped truss that forms a right angle triangle.
Roof slope style.
It s often used for sheds garages or extension of an existing roof.
Select an angle of slope away from a house into an area with good drainage and complementary to an existing house or other building.
It consists of a triangle formed from a tie beam at the base and two sloping rafters joined at the top.
A low slope roof is anywhere from 2 in 12 to 4 in 12.
The run always remains constant at 12 inches.
Conventional slope roof range between 4 in 12 and 8 in 12.
Roof truss designs king truss.