This is called prescriptive solutions.
Overlapping roof rafters.
Overhangs can vary in width from a few inches to several feet.
On sheds and homes overhangs are commonly referred to as eaves or rakes depending on where they are located.
With roofs this is done to improve the load value of rafters when installing.
Benefits of roof overhang on sheds.
When placing rafters for a tin roof also frequently referred to as corrugated metal or steel it is common to set the distance between rafters based on the size of the roofing panels.
Sister refers to attaching an additional framing member alongside an existing member.
The fact is that there are many things carpenters do that are allowed because we all know they work.
If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters.
How to sister a roof rafter.
The roof rafters provide integral structural support to the roof.
Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal.
Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.
Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof.