Will a 2x4 rafter 16 oc be fine or do i need to use 2x6 rafters.
Shed roof rafters 2x4 or 2x6.
A stick framed roof uses 2x4 s or 2x6 s or whatever you are framing with but has a ridge board running down the middle ridge line.
You then have rafters running down from this ridge board and resting on the top wall plates.
For instance 2 grade 2x4s at 16 on center will span just over 9.
A rafter or speed square will have marks for both of these angles.
Span calculator for wood joists and rafters also available for the android os.
If you have a simple gable shed roof then using 2 4 rafters makes more sense unless you have a very large shed.
Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch.
Im building a 8x12 shed.
Will 2x4 rafters 24 inch on centre hold up my 8 x 12 shed.
For standard shed roof rafter spacing see rafter span chart.
The roof will have a 3 12 slope to match my garage.
There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.
Build gables suspend ridge board install 2x6 rafters w proper birds mouths.
The roof on this shed is a 4 in 12 slope which makes it a 18 and one half degree angle on the board ends.
2 x 6 will allow you to properly do soffit facia and overhang ladders.
If you get premium kiln dried lumber then you could span 10 5 with the same size of lumber and.
Sometimes the rafter will have a tail and extend out past the wall so that you have a soffit or overhang.
A couple of joists or collar ties further up to stop spreading and you re done.
I think you are overthinking it.
The ridge end of the rafter and often the eve end will need to be cut to the angle of the roof slope.