In order to build a roof for a large shed you needs the following.
How far apart roof rafters for shed.
An syp 2 6 rafter at 24 o c.
There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.
Span length for 2 6 rafters.
Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter.
A 18 pieces of 2 4 lumber 20 3 4 9 pieces of 2 4 lumber 38 1 2 long intermmediate rafters.
The roof rafters provide integral structural support to the roof.
A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel.
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.
A 18 pieces of 2 4 lumber 92 long both ends cut at 30º rafters.
2 6 shed roof rafters are enough for nearly any type of shed a homeowner wants to build.
While a 2 6 might be nearly double the cost of a 2 4 you can likely space the 2x6s further apart negating the added expense of increasing your lumber width.
For standard shed roof rafter spacing see rafter span chart.
A 9 pieces of 2 4 lumber 145 1 4 long cut at 60º at both ends bottom rafters.
Wider panels allow for greater spacing between rafters.
To determine how far apart to set rafters measure the width of the metal panel and then the width of the first hill and valley of the panel.
For instance 2 grade 2x4s at 16 on center will span just over 9.