A gable style roof is considered to be the easiest type of shed roof framing to work with.
How to support shed roof.
Usually trusses are put 24 inches apart.
As each truss is put up on top of opposite walls it must be put up straight and supported while the next truss is put up.
Another thing you can do inside your garden shed is installing additional support beams underneath the roof.
To hold them up until the decking of the roof is placed on top a 12 foot 1 inch by 4 inch piece of lumber is used.
Essentially you will be building a series of triangular shaped trusses based on the pitch of your roof.
In addition you may want to incorporate a shed loftwithin the roof space or a shed skylightto maximise the light in the shed.
This will ensure a more even weight distribution on the four walls and enable the structure to better handle the motions of the roof.