Builders aren't bound by standard rafter spacing measurements. But they do tend to space rafters in one of several industry-standard increments, typically either 12, 16 or 24 inches apart.
Are 2x6 OK for rafters?
You can use either 2×6 or 2×4 rafters for roofs with a 3/12 pitch or greater, but it depends on the overall size of your shed. For roofs that won't experience heavy snow loads, a gable roof can span up to 22' with 2×4 rafters.
How do you calculate rafter spacing?
This means roughly anything more than 14 feet in width. An easy way to determine your rafter spacing when working with this wider spacing is to convert the total number of feet you're working with into inches, and divide the number by 16.11 ene 2018
How far apart do ceiling rafters need to be?
But they do tend to space rafters in one of several industry-standard increments, typically either 12, 16 or 24 inches apart. These spacing intervals are measured "on center," meaning that the measurement is taken from the center of one rafter's horizontal surface to the center of the next rafter.