A roof joist is always spaced no more than 16 inches apart from another roof joist.
How far apart are roof joists on 10x10 lean to.
Measure from the ends.
In other words you would space a roof joist 15 inches apart from another roof joist but never 17 inches apart.
But they do tend to space rafters in one of several industry standard increments.
You can simplify the construction of your lean to roof even more by building your own trusses.
Cut the joists to the intended width of your shed.
430 cm long in order to cover the sloping roof and hang off of the far side.
Then use the circular saw to cut a 1 by 3 5 inches 2 5 cm 8 9 cm notch 10 25 inches 26 0 cm from the top of each rafter.
Builders aren t bound by standard rafter spacing measurements.
If the roof is not completely square you can decrease the space between joists but never increase the space.